Mobile County, AL Building Permits, Zoning & Septic Rules

Unincorporated Mobile County, Alabama requires a building permit for the construction, alteration, demolition or repair of a structure, issued by the county's Inspection Services department¹. The county has no zoning outside its cities, so there is no minimum lot size, setback or use restriction on unincorporated land²³. Septic systems go through the Mobile County Health Department under Alabama's statewide onsite sewage program, and Alabama lets a homeowner build their own home without hiring a licensed contractor by filing an exemption, though the county building permit itself is still required⁴⁵.

At a glance

Building permit: Required in unincorporated Mobile County for construction, alteration, demolition and repair¹
Zoning: None in unincorporated Mobile County²
Septic permit: Required; issued by the Mobile County Health Department⁴
Owner-builder exemption: Yes, statewide, by filing a Sworn Statement of Exemption; the building permit is still required⁵⁶
Minimum lot size / setbacks: None set countywide; there's no zoning ordinance to set them³
RV, tiny home or manufactured home: No zoning-based restriction; a manufactured home needs a HUD Seal and connection to required utilities³⁷
Driveway or utility work in a county right-of-way: Needs a Right of Way Encroachment Permit from Inspection Services⁸
Property tax: About 0.5% effective rate; median bill around $849/year⁹¹⁰

Who to call

Building permits

Mobile County Inspection Services

Regulates construction, demolition, alteration and repair of structures in unincorporated Mobile County, including plan review, permitting and inspection under the adopted building codes and flood damage prevention ordinance, and issues Right of Way Encroachment Permits for driveways and utility work

251-574-3507

[email protected]

1110 Schillinger Road N., Mobile, Alabama 36608

Online permits →

Zoning

Mobile County Development and Zoning

Confirms zoning status by parcel, administers commercial site plan review as the county's land-disturbance permit, and maps municipal extraterritorial jurisdictions where a city, not the county, handles permitting

251-574-8595

[email protected]

Mobile Government Plaza, 205 Government Street, Mobile, Alabama 36644-1600

Septic permits

Mobile County Health Department, Onsite Sewage Division

Permits, inspects and regulates septic (onsite sewage) systems in unincorporated Mobile County under ADPH's statewide Onsite Sewage Treatment and Disposal Rules

Contact details are copied from each office’s official page and were checked against it on September 24, 2026.

Do you need a building permit in Mobile County, Alabama?

Unincorporated Mobile County, Alabama requires a building permit before construction, alteration, demolition or repair of a structure, and the county's Inspection Services department reviews plans, issues the permit and inspects the work¹⁸. That authority covers work subject to the county's adopted building codes and its Flood Damage Prevention Ordinance, which exists to protect residents in the wake of storms and flooding along the Gulf Coast⁸. Alabama law lets a county commission adopt building laws and codes by ordinance for unincorporated areas, and Mobile County has done so through Inspection Services¹¹. If you're acting as your own contractor, Alabama's statewide owner-builder exemption lets you build or improve a one- or two-family home for your own use without a contractor's license, though the county permit is still required and any subcontractor billing more than $10,000 must be licensed⁵⁶.

Who is the Mobile County building department, and how do you reach them?

Inspection Services is the Mobile County office that issues building permits, at 1110 Schillinger Road N., Mobile, Alabama 36608, phone 251-574-3507, email [email protected], open Monday through Friday⁸. If your project needs a driveway, utility line, or drainage work in a county right-of-way, that same office issues the Right of Way Encroachment Permit, applied for online through the county's OpenGov portal⁸. Zoning status and land-disturbance site-plan questions go to a separate office: Development and Zoning, at Mobile Government Plaza, 205 Government Street, Mobile, Alabama 36644-1600, phone 251-574-8595¹². Septic permits are a third office entirely: the Mobile County Health Department's Onsite Sewage Division, reached through the health department's own site rather than the county government's¹³.

Does Mobile County have zoning?

There is no zoning in the unincorporated areas of Mobile County, in the Development and Zoning office's own words²¹². Because there's no zoning ordinance, the county sets no minimum lot size, no setback rule, no lot-coverage limit and no building-height limit anywhere in unincorporated Mobile County, and there's no zoning-based restriction on an accessory dwelling, an RV, a tiny home or a manufactured home used as a residence³. Alabama counties generally lack broad zoning authority, and the state's own county-government handbook names only Baldwin, Russell, Shelby and Jefferson Counties as having built zoning through local law; Mobile County isn't one of them¹⁴. One wrinkle to watch for: several municipalities in Mobile County exercise their own permitting authority within their extraterritorial jurisdictions, so land that looks unincorporated on a map can still be regulated by a nearby city rather than the county¹².

How do septic permits work in Mobile County?

Septic systems in unincorporated Mobile County are permitted by the Mobile County Health Department's Onsite Sewage Division, operating under Alabama's statewide onsite sewage program⁴. Alabama law requires anyone not connected to a public sanitary sewer to get a Permit to Install from the local health department before construction can begin, and only a registered engineer may design a system where soil percolation takes longer than 60 minutes or a shallow limiting zone exists¹⁵. An inspection and Approval for Use are required before you can occupy a home served by a new system¹⁶. Soils here are comparatively forgiving for the region: about 26.4% of Mobile County's land is rated free of severe limits for a conventional septic drain field, so a straightforward system is realistic on many tracts, though a site evaluation is still the way to know for a specific parcel¹⁷.

Can you live in an RV or tiny home on your land in Mobile County?

Mobile County places no zoning-based restriction on RV occupancy, tiny-home occupancy or manufactured-home occupancy on unincorporated land, because the county has no zoning ordinance to set one³². A manufactured home is recognized as a residence statewide once it carries a HUD Seal and is connected to required plumbing, heating, air-conditioning and electrical utilities⁷. Removing a zoning restriction doesn't remove Mobile County's other permits, though: a new manufactured or tiny home built as a permanent structure still needs the same building permit a stick-built house needs, plus a septic permit if it isn't on sewer⁸¹. Confirm your parcel isn't inside a municipality's extraterritorial jurisdiction first, since a nearby city's rules, not the county's absence of zoning, would apply there instead¹².

Building a home in Mobile County: the steps, in order

Confirm your parcel is in unincorporated Mobile County rather than a municipality's extraterritorial jurisdiction, using the county's GIS & Mapping department or by calling Development and Zoning with your parcel number¹².
Apply for your building permit with Inspection Services, at 1110 Schillinger Road N., Mobile, or by phone at 251-574-3507⁸.
If you're your own contractor, file Alabama's Sworn Statement of Exemption; any subcontractor whose portion costs more than $10,000 still needs to be licensed⁵⁶.
Start your septic Permit to Install with the Mobile County Health Department's Onsite Sewage Division before construction if you're not on public sewer⁴¹⁵.
If your driveway, utility line or drainage work touches a county right-of-way, get a Right of Way Encroachment Permit through the county's OpenGov portal⁸.
If you're placing a manufactured home, confirm it carries a HUD Seal and is connected to required plumbing, heating, air-conditioning and electrical utilities⁷.
Budget for property tax: Mobile County's effective rate runs about 0.5%, with a median bill around $849 a year⁹¹⁰.

What to check before you buy land in Mobile County, Alabama

Rain is the headline weather risk here: Mobile County averages about 64.5 inches of precipitation a year, with severe drought in only about 7.3% of recent years¹⁸¹⁹. Septic soils run better than in much of coastal Alabama: about 26.4% of the county's land is rated free of severe limits for a conventional drain field, though a site evaluation still matters for any specific tract¹⁷. Terrain is easy to build on: about 95.5% of Mobile County sits at 15% slope or less, and about 72.9% is wooded²⁰²¹. As a Gulf Coast county, check any parcel against FEMA's flood maps before you buy: a community participating in the National Flood Insurance Program must require a permit for development in a Special Flood Hazard Area, and an addition or improvement worth 50% or more of a structure's value generally triggers bringing the whole structure up to mapped elevations²². Federal land is minimal, at about 0.5% of the county, and population density runs about 334.8 people per square mile across roughly 411,640 residents, with the nearest metro area about 9 miles away²³²⁴²⁵²⁶. Farmland has recently valued around $4,768 an acre and a typical home around $198,842, against a roughly 0.5% effective property tax rate and a median bill near $849 a year²⁷²⁸⁹¹⁰.

Watch-outs

Land that looks unincorporated on a map can still sit inside a municipality's extraterritorial jurisdiction, where that city, not Mobile County's no-zoning rule, handles building and development permits; confirm with Development and Zoning before assuming county rules apply¹².
If any part of a parcel is in a Special Flood Hazard Area, expect a floodplain development permit and, for a substantial improvement, elevation requirements on top of the county's regular building permit²².
The Mobile County Health Department's septic contact page returned a bot-verification challenge to automated checks and no recent web archive snapshot exists; call the health department directly to confirm current phone, address and application details before you rely on them⁴.

Sources

Written September 24, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

How Mobile County scores

Seclusion61100% ev.

Self-Sufficiency68100% ev.

Admin Boringness65100% ev.

Durability53100% ev.

Property Autonomy39100% ev.

Carry Cost84100% ev.

Evidence strength: 100%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$199kTypical home

0.5%Property tax

$4,768Land / acre

64.5"Annual rain

7.3% of yrsSevere drought

5.5 / yr (+5.1)Mid-century 100°F days

16.3 daysMid-century dry spell

3.86" (+5%)Mid-century 1-day rain

1.28×Wildfire change factor

100%Forward climate coverage

$2,097Home insurance / yr

-0.2% / yrInsurance growth

0.91%Nonrenewal rate

county median (2+ published ZIPs)Insurance basis

8,394People within 30 min

1,630,120People within 2 hr

131,108Radius comparison (15 mi)

334.8People / sq mi

0.5%Federal land

95.5%Land at 15% slope or less

26.4%Septic soil without severe limits

198,701 acWorkable land screen

72.9%Wooded land

37.7 tonsBiomass / forest ac

67.2°FAvg temp

Answers from the rulebook for Mobile County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Mobile County rules

InspectionsRequired
Work subject to the adopted Building Codes and Flood Damage Prevention Ordinance in unincorporated Mobile County.
- The county describes its function as including plan review, permitting, and inspection of subject work.
“inspection of all work that is subject to the adopted Building Codes”
Inspection Services ↗Re-checked Sep 26, 2026
Certificate of occupancyLimited
Permanent electrical and water connection for buildings subject to the Mobile County Building Code.
- A temporary connection authorization is valid for 90 days from authorization.
- Permanent connection may instead be authorized by a Certificate of Completion issued by the Building Official.
temporary connection authorization duration: 90 days
“Certificate of Occupancy or Certificate of Completion”
Mobile County Building Code Adoption and Amendments ↗Re-checked Sep 26, 2026
County-wide zoningAbsent
Land use in unincorporated Mobile County.
- This does not address municipal zoning or other county development, subdivision, floodplain, health, or building-code controls.
“There is no zoning in the unincorporated areas of Mobile County.”
Development and Zoning ↗Re-checked Sep 26, 2026
Zoning districts · by state lawNo county rule
Unincorporated Mobile County: no county rule sets this, because Alabama law gives zoning power only to certain counties, and Mobile County has no zoning ordinance. Mobile County's own reviewed answer confirms it has no county-wide zoning.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Alabama counties lack broad, general land-use regulatory authority under general Alabama law.
- Limited authority may arise through county-specific local laws, including examples identified by the handbook for Baldwin, Russell, Shelby, and Jefferson Counties.
“Counties in Alabama do not have broad and general land use regulatory authority under general Alabama law, although several counties have created some form of planning and zoning authority by local law. However, as set out below, the Legislature has granted limited authority to county governing bodies to address certain special circumstances related to use of land within the territorial jurisdiction of the county.”
Alabama County Commissioners Handbook, 13th Edition ↗Re-checked Sep 21, 2026
Minimum dwelling size · by state lawNo county rule
Unincorporated Mobile County: no county rule sets this, because Alabama law gives zoning power only to certain counties, and Mobile County has no zoning ordinance. Mobile County's own reviewed answer confirms it has no county-wide zoning.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Alabama counties lack broad, general land-use regulatory authority under general Alabama law.
- Limited authority may arise through county-specific local laws, including examples identified by the handbook for Baldwin, Russell, Shelby, and Jefferson Counties.
“Counties in Alabama do not have broad and general land use regulatory authority under general Alabama law, although several counties have created some form of planning and zoning authority by local law. However, as set out below, the Legislature has granted limited authority to county governing bodies to address certain special circumstances related to use of land within the territorial jurisdiction of the county.”
Alabama County Commissioners Handbook, 13th Edition ↗Re-checked Sep 21, 2026
Minimum lot size · by state lawNo county rule
Unincorporated Mobile County: no county rule sets this, because Alabama law gives zoning power only to certain counties, and Mobile County has no zoning ordinance. Mobile County's own reviewed answer confirms it has no county-wide zoning.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Alabama counties lack broad, general land-use regulatory authority under general Alabama law.
- Limited authority may arise through county-specific local laws, including examples identified by the handbook for Baldwin, Russell, Shelby, and Jefferson Counties.
“Counties in Alabama do not have broad and general land use regulatory authority under general Alabama law, although several counties have created some form of planning and zoning authority by local law. However, as set out below, the Legislature has granted limited authority to county governing bodies to address certain special circumstances related to use of land within the territorial jurisdiction of the county.”
Alabama County Commissioners Handbook, 13th Edition ↗Re-checked Sep 21, 2026
Setbacks · by state lawNo county rule
Unincorporated Mobile County: no county rule sets this, because Alabama law gives zoning power only to certain counties, and Mobile County has no zoning ordinance. Mobile County's own reviewed answer confirms it has no county-wide zoning.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Alabama counties lack broad, general land-use regulatory authority under general Alabama law.
- Limited authority may arise through county-specific local laws, including examples identified by the handbook for Baldwin, Russell, Shelby, and Jefferson Counties.
“Counties in Alabama do not have broad and general land use regulatory authority under general Alabama law, although several counties have created some form of planning and zoning authority by local law. However, as set out below, the Legislature has granted limited authority to county governing bodies to address certain special circumstances related to use of land within the territorial jurisdiction of the county.”
Alabama County Commissioners Handbook, 13th Edition ↗Re-checked Sep 21, 2026
Lot coverage · by state lawNo county rule
Unincorporated Mobile County: no county rule sets this, because Alabama law gives zoning power only to certain counties, and Mobile County has no zoning ordinance. Mobile County's own reviewed answer confirms it has no county-wide zoning.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Alabama counties lack broad, general land-use regulatory authority under general Alabama law.
- Limited authority may arise through county-specific local laws, including examples identified by the handbook for Baldwin, Russell, Shelby, and Jefferson Counties.
“Counties in Alabama do not have broad and general land use regulatory authority under general Alabama law, although several counties have created some form of planning and zoning authority by local law. However, as set out below, the Legislature has granted limited authority to county governing bodies to address certain special circumstances related to use of land within the territorial jurisdiction of the county.”
Alabama County Commissioners Handbook, 13th Edition ↗Re-checked Sep 21, 2026
Building height · by state lawNo county rule
Unincorporated Mobile County: no county rule sets this, because Alabama law gives zoning power only to certain counties, and Mobile County has no zoning ordinance. Mobile County's own reviewed answer confirms it has no county-wide zoning.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Alabama counties lack broad, general land-use regulatory authority under general Alabama law.
- Limited authority may arise through county-specific local laws, including examples identified by the handbook for Baldwin, Russell, Shelby, and Jefferson Counties.
“Counties in Alabama do not have broad and general land use regulatory authority under general Alabama law, although several counties have created some form of planning and zoning authority by local law. However, as set out below, the Legislature has granted limited authority to county governing bodies to address certain special circumstances related to use of land within the territorial jurisdiction of the county.”
Alabama County Commissioners Handbook, 13th Edition ↗Re-checked Sep 21, 2026
Living in an RV · by state lawNo county rule
Unincorporated Mobile County: no county rule sets this, because Alabama law gives zoning power only to certain counties, and Mobile County has no zoning ordinance. Mobile County's own reviewed answer confirms it has no county-wide zoning.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Alabama counties lack broad, general land-use regulatory authority under general Alabama law.
- Limited authority may arise through county-specific local laws, including examples identified by the handbook for Baldwin, Russell, Shelby, and Jefferson Counties.
“Counties in Alabama do not have broad and general land use regulatory authority under general Alabama law, although several counties have created some form of planning and zoning authority by local law. However, as set out below, the Legislature has granted limited authority to county governing bodies to address certain special circumstances related to use of land within the territorial jurisdiction of the county.”
Alabama County Commissioners Handbook, 13th Edition ↗Re-checked Sep 21, 2026
Camping on your land · by state lawNo county rule
Unincorporated Mobile County: no county rule sets this, because Alabama law gives zoning power only to certain counties, and Mobile County has no zoning ordinance. Mobile County's own reviewed answer confirms it has no county-wide zoning.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Alabama counties lack broad, general land-use regulatory authority under general Alabama law.
- Limited authority may arise through county-specific local laws, including examples identified by the handbook for Baldwin, Russell, Shelby, and Jefferson Counties.
“Counties in Alabama do not have broad and general land use regulatory authority under general Alabama law, although several counties have created some form of planning and zoning authority by local law. However, as set out below, the Legislature has granted limited authority to county governing bodies to address certain special circumstances related to use of land within the territorial jurisdiction of the county.”
Alabama County Commissioners Handbook, 13th Edition ↗Re-checked Sep 21, 2026
Tiny homes · by state lawNo county rule
Unincorporated Mobile County: no county rule sets this, because Alabama law gives zoning power only to certain counties, and Mobile County has no zoning ordinance. Mobile County's own reviewed answer confirms it has no county-wide zoning.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Alabama counties lack broad, general land-use regulatory authority under general Alabama law.
- Limited authority may arise through county-specific local laws, including examples identified by the handbook for Baldwin, Russell, Shelby, and Jefferson Counties.
“Counties in Alabama do not have broad and general land use regulatory authority under general Alabama law, although several counties have created some form of planning and zoning authority by local law. However, as set out below, the Legislature has granted limited authority to county governing bodies to address certain special circumstances related to use of land within the territorial jurisdiction of the county.”
Alabama County Commissioners Handbook, 13th Edition ↗Re-checked Sep 21, 2026
Manufactured homes · by state lawNo county rule
Unincorporated Mobile County: no county rule sets this, because Alabama law gives zoning power only to certain counties, and Mobile County has no zoning ordinance. Mobile County's own reviewed answer confirms it has no county-wide zoning.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Alabama counties lack broad, general land-use regulatory authority under general Alabama law.
- Limited authority may arise through county-specific local laws, including examples identified by the handbook for Baldwin, Russell, Shelby, and Jefferson Counties.
“Counties in Alabama do not have broad and general land use regulatory authority under general Alabama law, although several counties have created some form of planning and zoning authority by local law. However, as set out below, the Legislature has granted limited authority to county governing bodies to address certain special circumstances related to use of land within the territorial jurisdiction of the county.”
Alabama County Commissioners Handbook, 13th Edition ↗Re-checked Sep 21, 2026
Accessory dwellings · by state lawNo county rule
Unincorporated Mobile County: no county rule sets this, because Alabama law gives zoning power only to certain counties, and Mobile County has no zoning ordinance. Mobile County's own reviewed answer confirms it has no county-wide zoning.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Alabama counties lack broad, general land-use regulatory authority under general Alabama law.
- Limited authority may arise through county-specific local laws, including examples identified by the handbook for Baldwin, Russell, Shelby, and Jefferson Counties.
“Counties in Alabama do not have broad and general land use regulatory authority under general Alabama law, although several counties have created some form of planning and zoning authority by local law. However, as set out below, the Legislature has granted limited authority to county governing bodies to address certain special circumstances related to use of land within the territorial jurisdiction of the county.”
Alabama County Commissioners Handbook, 13th Edition ↗Re-checked Sep 21, 2026
Who permits septicLocal (with conditions)
Residential and commercial onsite sewage disposal systems in Mobile County.
- The Onsite Sewage division follows the ADPH Onsite Sewage Treatment and Disposal Rules.
“Onsite Sewage division regulates the permitting”
Environmental Health ↗Re-checked Sep 26, 2026
Septic permitRequired
Residential and commercial onsite sewage disposal systems in Mobile County.
- The division regulates onsite-system permitting, installations, and inspections under ADPH Onsite Sewage Treatment and Disposal Rules.
residential application/inspection fee: 200 USD · commercial application/inspection fee: 270 USD
“permitting, installations and inspections of onsite sewage disposal systems”
Environmental Health ↗Re-checked Sep 26, 2026
Septic inspectionRequired
Residential and commercial onsite sewage disposal systems in Mobile County.
- Pump trucks require an annual inspection before use.
- This claim does not establish a recurring inspection interval for every installed septic system.
pump-truck inspection frequency: per 1 year (Prior to use.)
“requires an annual inspection of the pump truck prior to use.”
Environmental Health ↗Re-checked Sep 26, 2026
Mandatory utility hookupConditional
Electrical and water service to buildings subject to the Mobile County Building Code.
- Existing structures and occupancy must comply with the building code and Floodplain Development Ordinance.
- Mobile County Health Department approval must be obtained for the intended use.
- Buildings served must have been legally permitted, inspected, and approved.
“Electrical and water service shall not be approved”
Mobile County Building Code Adoption and Amendments ↗Re-checked Sep 26, 2026
Subdividing landRegulated (with conditions)
Subdivisions in Mobile County, subject to the jurisdictional process described by the county.
- Subdivisions within municipal limits are approved by the municipality.
- For subdivisions outside a municipal planning jurisdiction, county staff approval, notice to adjacent owners and utilities, County Commission approval, and County Engineer signature are required.
- Subdivisions subject to County Commission approval must meet the Subdivision Regulations for Mobile County.
“Subdivisions subject to County Commission approval are required to meet the Subdivision Regulations for Mobile County.”
Subdivisions ↗Re-checked Sep 26, 2026
Driveway accessRequired
Driveway work in a Mobile County right-of-way.
- The requirement also covers utility, drainage, and other permittable encroachments in a Mobile County right-of-way.
- This does not establish a county permit requirement for the portions of driveways on private property.
“A Right of Way Encroachment Permit is required for all work in Mobile County Rights of Way.”
Inspection Services ↗Re-checked Sep 26, 2026
Permit feesPublished (with conditions)
Mobile County Inspection Services permits subject to its current fee schedule.
- The county states that the current fee schedule was adopted by County Commission resolution.
- The stated effective date is July 1, 2026.
fee-schedule effective date: 2026-07-01
“Our Current Fee Schedule was adopted by resolution of the County Commission”
Adopted Codes ↗Re-checked Sep 26, 2026
Permit processPartial
County construction and development permitting in unincorporated Mobile County.
- County development permitting has a Commercial Site Plan Review phase for land disturbance and an Inspection Services phase for code review and building permits.
- The opened material does not establish a complete process for every permit type.
“Development permitting with Mobile County has two phases”
Development and Zoning ↗Re-checked Sep 26, 2026

Alabama rules that apply here

Building permitLimited
Residential construction undertakings in Alabama for which the Home Builders Licensure Law requires a residential home builders license and a local incorporated municipality, municipal subdivision, or county authority issues the building or similar permit.
- The issuing building official must refuse the permit unless the applicant provides evidence of the required license or an exemption.
- The cited provision addresses undertakings requiring a license; it does not establish that every residential project statewide requires a building permit.
- Local building-permit rules and local building codes remain applicable.
“to refuse to issue a permit for any undertaking which would require a license hereunder unless the applicant has furnished evidence”
Home Builders Licensure Law ↗Re-checked Sep 26, 2026
Owner-builder exemptionConditional
Owners building or improving one-family or two-family residences in Alabama for their own occupancy or use.
- The owner must act as the owner's own contractor.
- The owner must provide all material supervision personally.
- The residence must be a one-family or two-family residence on the owner's property.
- The residence must be for the occupancy or use of the owners and must not be offered for sale.
- The exemption is nontransferable.
- A homeowner who hires or compensates anyone to supervise the building or improvement is not acting as the owner's own contractor.
- Subcontractors hired by an exempt homeowner must be licensed if the cost of the subcontractor's portion exceeds $10,000.
- Offering the residence for sale within one year after substantial completion is presumptive evidence that construction was undertaken for sale.
subcontractor portion cost threshold: > 10000 USD (subcontractor must be licensed when the threshold is exceeded) · sale-offer period: 1 year after substantial completion (sale or offer for sale is presumptive evidence of construction for sale)
“Owners of property when acting as their own contractor and providing all material supervision themselves, when building or improving one-family or two-family residences”
Exemptions ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Available (with conditions) — Alabama Home Builders Licensure Law licensing exemption for an owner acting as the owner’s own residential contractor when building or improving a one-family or two-family residence for the owner’s own occupancy or use.
  “Owners of property when acting as their own contractor and providing all material supervision themselves, when building or improving one-family or two-family residences on such property for the occupancy or use of such owners and not offered for sale. This exemption is a nontransferable privilege.”
  Exemptions ↗Re-checked Sep 8, 2026
Building code adoptedPartial
Residential construction and improvements governed by Alabama's Home Builders Licensure Law, including construction in local jurisdictions without an already adopted residential building code.
- The Home Builders Licensure Board has sole authority to adopt the Alabama Residential Building Code and Alabama Residential Energy Code.
- The statewide residential building code is stated by the official HBLB Spring 2026 newsletter to go into effect January 1, 2027.
- The statewide code establishes minimum standards in local jurisdictions that do not already have an adopted residential building code.
- Local jurisdictions with an adopted code and enforcement do not need to make a change under the described transition framework.
- The 2025 statute provides that the Alabama Residential Building Code does not supersede a local residential building code adopted by a county or municipality in effect on January 1, 2027.
- A local building code adopted after January 1, 2027, must meet the minimum standards of the Alabama Residential Building Code and Alabama Residential Energy Code in effect when adopted; local conditions may support amendments, subject to the statutory limits.
- The Alabama Residential Building Code does not apply to an agricultural building except for a residence contained therein.
statewide residential building code effective date: 2027-01-01 · post-2027 local-code minimum: must meet the Alabama Residential Building Code and Alabama Residential Energy Code minimum standards (Local conditions may require amendments subject to statutory limits.)
“Beginning January 1, 2027, a residential home builder within this state who constructs, renovates, or repairs a residence or structure shall do so”
Home Builders Licensure Law and 2025 legislative changes ↗Re-checked Sep 26, 2026
9 more reviewed findings on this topic
- Adopted (with conditions) — State Building Code requirements administered and enforced by the Alabama Division of Construction Management for state-owned or state-funded construction, K-12 schools, public postsecondary schools, hotels and motels, movie theaters, and other work within DCM jurisdiction.
  “The State Building Code is limited to any new construction, addition, renovation, modification of mechanical, electrical, plumbing systems, sitework and generally any and all work on state-owned property and/or using state funds, on all public and private kindergarten through twelfth grade (K-12) schools, on public postsecondary schools, on hotels/motels and on movie theaters. DCM's code jurisdiction over plans and specifications of all municipal and county-owned projects is limited to such projects meeting Americans with Disabilities Act (ADA) Standards. DCM does not have jurisdiction over residential property or commercial property except for hotels/motels and movie theaters.”
  State Building Code ↗Re-checked Sep 9, 2026
- Partial — Residential construction and improvements governed by the Alabama Home Builders Licensure Law, including ordinary residential construction beginning January 1, 2027.
  “The Alabama Residential Building Code shall be enforced by local jurisdictions that have permitting and inspection programs for residential construction and improvements that are adhered to by residential home builders. The Alabama Residential Building Code shall not supersede any local residential building code adopted by any county or municipality in effect on January 1, 2027. [...] Beginning January 1, 2027, a residential home builder within this state who constructs, renovates, or repairs a residence or structure shall do so in accordance with applicable residential building code adopted pursuant to Section 34-14A-12 or, if applicable, the local jurisdiction’s residential building code.”
  Home Builders Licensure Law, Effective October 1, 2025 ↗Re-checked Sep 9, 2026
- Partial — Construction within the Alabama Division of Construction Management jurisdiction, including state-owned or state-funded work, public and private K-12 schools, public higher-education institutions, hotels, motels, and movie theaters.
  “The 2021 International Building Code [...] DCM does not have jurisdiction over residential property or commercial property except for hotels/motels and movie theaters.”
  Division of Construction Management — State Building Code ↗Re-checked Sep 9, 2026
- Partial — Construction within the Alabama Division of Construction Management jurisdiction, including state-owned or state-funded property, public and private K-12 schools, public higher-education institutions subject to the stated ACCS limitation, hotels/motels, and movie theaters.
  “The State Building Code is limited to any new construction, addition, renovation, modification of mechanical, electrical, plumbing systems, sitework”
  State Building Code ↗Re-checked Sep 21, 2026
- Partial — Residential building-code investigations by the Alabama Home Builders Licensure Board involving contracts entered into on or after February 13, 2022, in Alabama cities and counties that have not adopted a residential building code.
  “In cities and counties that have not adopted a residential building code, the Board will apply the 2015 International Residential building Code (IRC)”
  Administrative Rules and Regulations ↗Re-checked Sep 21, 2026
- Partial — Alabama's statutory framework authorizing county commissions to adopt building laws and codes for unincorporated areas and recognizing municipal building laws or codes within municipal police jurisdictions.
  “The county commissions of the several counties are authorized and empowered to adopt building laws and codes by ordinance”
  Home Builders Licensure Law ↗Re-checked Sep 21, 2026
- Partial — Residential construction and improvements statewide under the Alabama Residential Building Code framework.
  “The Alabama Residential Building Code shall not supersede any local residential building code adopted by any county or municipality in effect on January 1, 2027.”
  Home Builders Licensure Board Law Effective October 1, 2025 ↗Re-checked Sep 21, 2026
- Partial — Projects within the Alabama Division of Construction Management's State Building Code jurisdiction, including state construction and specified school, hotel/motel, and movie-theater projects; not ordinary residential property.
  “DCM does not have jurisdiction over residential property or commercial property except for hotels/motels and movie theaters.”
  Division of Construction Management Building Code Jurisdiction ↗Re-checked Sep 26, 2026
- Partial — Residential construction in Alabama where a county or municipality has a permitting and inspection program or has adopted a local residential building code; this is not a uniform DCM residential-code jurisdiction.
  “The Alabama Residential Building Code shall be enforced by local jurisdictions”
  Home Builders Licensure Board Law, Effective October 1, 2025 ↗Re-checked Sep 26, 2026
Off-grid sanitationAllowed (with conditions)
Use of an onsite septic/onsite sewage treatment and disposal system instead of connection to a municipal sewer where municipal sewers are unavailable or impractical.
- The system must comply with ADPH onsite sewage rules.
- A Permit to Install is required before construction.
- Inspection and an Approval for Use are required before occupancy.
- Site and soil suitability, professional design, and local health-department review may be required.
“Septic tank systems are used where municipal sewers are not available or are impractical.”
Septic Tank Systems ↗Re-checked Sep 8, 2026
Well permitLimited
New groundwater wells and alterations to existing groundwater wells extracting at least 50 gallons per minute when the well is in Alabama's coastal area or its 50-year capture zone extends into the coastal area.
- A permit from ADEM is required for the covered installation or alteration.
- The cited rule is limited to the specified coastal-area or capture-zone circumstances and does not establish a general statewide permit requirement for individual private wells.
- ADEM states that it does not have regulatory authority over individual private wells.
groundwater extraction rate: >= 50 gallons per minute (Applies when the well surface location is in the coastal area or the 50-year capture zone extends into the coastal area.)
“The installation of a new well, or alteration of an existing well, for the purposes of extracting groundwater”
Coastal Permitting Information ↗Re-checked Sep 8, 2026
Agricultural exemptionAvailable (with conditions)
Agricultural buildings under the Alabama Home Builders Licensure Board residential home-builder licensing rules.
- The exemption does not include a residence contained in the agricultural building.
- The agricultural building must meet the definition in Ala. Admin. Code r. 465-X-1-.01(3).
“Agricultural buildings, as defined in Ala. Admin. Code r. 465-X-1-.01(3), except for any residence contained therein.”
Alabama Administrative Code, Home Builders Licensure Board Rules and Regulations ↗Re-checked Sep 8, 2026
Building in a floodplainRequired
Development in a Special Flood Hazard Area within an Alabama community participating in the National Flood Insurance Program.
- The actual development permit is administered by the local building or floodplain official.
- More stringent local requirements may apply.
- Additions or improvements valued at 50% or more of the existing structure's market value are substantial improvements and generally trigger bringing the entire structure into compliance with mapped elevations.
substantial-improvement threshold: >= 50 percent of existing structure market value
“When a community chooses to participate in the NFIP, it must require permits for all development in the SFHA”
My house is in a floodplain. What do I do if I want to build an addition or otherwise improve it? ↗Re-checked Sep 8, 2026
county zoning authorityLimited
Alabama county authority to adopt zoning for unincorporated land.
- Alabama counties lack broad, general land-use regulatory authority under general Alabama law.
- Limited authority may arise through county-specific local laws, including examples identified by the handbook for Baldwin, Russell, Shelby, and Jefferson Counties.
- Counties may regulate land use in flood-prone areas under Ala. Code § 11-19-1 et seq.; flood-prone areas are areas with a frequency of inundation of once in 100 years as defined by qualified hydrologists or engineers using generally accepted methods.
- Counties may adopt airport zoning regulations under Ala. Code § 4-6-4 to prevent airport hazards within airport hazard areas.
- For airport zoning, the county zoning jurisdiction is unincorporated county land except within a municipality's police jurisdiction and within two miles of a municipal airport when the municipality exercises or declares its intention to exercise zoning control, unless local law provides otherwise.
- The handbook notes an exception to the airport-zoning provision for counties with a population of not less than 54,500 nor more than 56,000 according to the 1970 federal decennial census.
“Counties in Alabama do not have broad and general land use regulatory authority under general Alabama law, although several counties have created some form of planning and zoning authority by local law. However, as set out below, the Legislature has granted limited authority to county governing bodies to address certain special circumstances related to use of land within the territorial jurisdiction of the county.”
Alabama County Commissioners Handbook, 13th Edition ↗Re-checked Sep 21, 2026
One more reviewed finding on this topic
- Limited — County authority over land use and zoning in unincorporated Alabama; general Alabama law does not grant counties broad general zoning authority, but limited authority exists through special local laws and specified statutory circumstances.
  “Counties in Alabama do not have broad and general land use regulatory authority under general Alabama law”
  Handbook for Alabama County Commissioners, 13th Edition ↗Re-checked Sep 26, 2026
county building authorityGeneral
Alabama county commissions adopting and administering residential building laws and codes in unincorporated areas.
- A county commission must act by resolution to adopt building laws or codes.
- The resolution must be provided to the Home Builders Licensure Board within 10 business days.
- A local building law or code generally may not take effect until 120 days after adoption; for insurance claims requiring licensed work, the effective date is the date of adoption.
- County building laws and codes may be enforced in a municipality's police jurisdiction outside municipal corporate limits as provided by Section 11-40-10(b)(2).
- Application within municipal corporate limits requires express consent of the municipal governing body.
- The county commission may employ building inspectors and exact fees from owners of inspected property.
- A county may discontinue administration and enforcement by resolution, but discontinuation generally does not take effect until 120 days after adoption and the resolution must be sent to the Board within 10 business days.
- Counties and municipalities may enter mutual agreements, compacts, and contracts for administration and enforcement, with a copy due to the Board within 10 business days.
- Beginning January 1, 2027, residential builders must follow the applicable state or local residential building code.
resolution transmission deadline: 10 business days (Copy must be provided to the Home Builders Licensure Board.) · local-code delayed effective period: 120 days (Insurance-claim work requiring a license is effective on the local adoption date.)
“A county commission, by resolution, may adopt building laws and codes”
Home Builders Licensure Board Law, Effective October 1, 2025 ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- General — Alabama county authority to adopt and enforce residential building laws and codes in unincorporated areas.
  “There are two general statutory provisions authorizing counties to adopt building codes: the Home Builders Licensure Law found at Ala. Code § 34-14A-1 et seq. and the law on the state minimum building standards code found at Ala. Code § 41-9-160 et seq.”
  Alabama County Commissioners Handbook, 13th Edition ↗Re-checked Sep 21, 2026

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

Short-term rentals — Short-term rental use of private property in Mobile County.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Mobile County, Alabama

Is Mobile County a good place to live off-grid or homestead?

Mobile County scores 71/100 on the Bolthole Index, a strong county profile. Its strengths: manageable long-term carry cost and strong self-sufficiency basics: 64.5″/yr rainfall with little drought. Watch-outs: a weaker property-autonomy legal backdrop.

Do you need a building permit in Mobile County, Alabama?

Mobile County generally requires a residential building permit, and it has no county-wide zoning. Onsite septic is permitted by Mobile County Health Department, Onsite Sewage Division. Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

Can you live in an RV or tiny home on your land in Mobile County?

Living in an RV on your own land in Mobile County is allowed: Unincorporated Mobile County: no county rule sets this, because Alabama law gives zoning power only to certain counties, and Mobile County has no zoning ordinance. Mobile County's own reviewed answer confirms it has no county-wide zoning. Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits. Alabama counties lack broad, general land-use regulatory authority under general Alabama law. A tiny home is allowed. Confirm with the county before relying on it.

How much does land cost in Mobile County, Alabama?

Land in Mobile County runs about $4,768 per acre, based on the latest county data.

What is the water situation in Mobile County?

Mobile County gets about 64.5" of rain a year, with severe drought in roughly 7.3% of years.

How remote is Mobile County?

A representative private-land location has about 8,394 people within a 30-minute drive and 1,630,120 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

Building permits, zoning and septic rules in Mobile County, Alabama

At a glance

Who to call

Do you need a building permit in Mobile County, Alabama?

Who is the Mobile County building department, and how do you reach them?

Does Mobile County have zoning?

How do septic permits work in Mobile County?

Can you live in an RV or tiny home on your land in Mobile County?

Building a home in Mobile County: the steps, in order

What to check before you buy land in Mobile County, Alabama

Watch-outs

Sources

Mobile County in Alabama

How Mobile County scores

Find land. Bring the promising ones back.

Parcel due diligence

Answers from the rulebook for Mobile County

Mobile County rules

Alabama rules that apply here

Still unanswered

Living off-grid in Mobile County, Alabama

Is Mobile County a good place to live off-grid or homestead?

Do you need a building permit in Mobile County, Alabama?

Can you live in an RV or tiny home on your land in Mobile County?

How much does land cost in Mobile County, Alabama?

What is the water situation in Mobile County?

How remote is Mobile County?

How Mobile compares in Alabama