Miami-Dade County, FL Building Permits, Zoning & Septic Rules

Unincorporated Miami-Dade County, Florida requires a building permit before most construction, remodeling or repair, enforced under the Florida Building Code by the county's Regulatory and Economic Resources (RER) department¹². The county also zones unincorporated land, and many smaller improvements, from above-ground pools to a trailer or modular unit used temporarily during construction, need a separate Zoning Improvement Permit (ZIP) from RER's Development Services Division³⁴. Septic systems are permitted through the Florida Department of Health in Miami-Dade County, but the county's own Ordinance No. 22-83 requires DERM's Water and Wastewater Section to review new and replacement systems and pushes many toward advanced treatment rather than a conventional drain field⁵⁶.

At a glance

Building permit: Required for most construction, remodeling and repair¹
Zoning: Yes; the county zones unincorporated land, and many smaller improvements need a Zoning Improvement Permit (ZIP)³
Septic permit: Required, through the Florida Department of Health in Miami-Dade County; DERM also reviews new/replacement systems under county Ordinance 22-83⁵
Owner-builder exemption: Not documented on county sources; confirm directly before assuming one applies⁷
RV, trailer or modular unit: A temporary trailer or modular unit used during construction needs its own ZIP; check with Development Services before placing one long-term⁴
Manufactured home occupancy: Needs a state onsite inspection and a certificate of occupancy after installation, on top of local zoning rules⁸
Federal & conservation land: About 57% of the county is federal land, mostly Everglades and Big Cypress conservation land⁹
Property tax: About 0.8% effective rate; median bill around $3,516/year¹⁰¹¹

Who to call

Building permits

Miami-Dade Regulatory and Economic Resources (RER) - Herbert S. Saffir Permitting and Inspection Center

Reviews and issues building permits for construction, remodeling and repair in unincorporated Miami-Dade County under the Florida Building Code

786-315-2000

11805 SW 26 Street, Miami, FL 33175

Zoning

Miami-Dade RER Development Services Division (Zoning Improvement Permit)

Issues the Zoning Improvement Permit (ZIP) confirming a project complies with the applicable zoning district's land use, height, coverage and setback rules

786-315-2660

11805 SW 26 Street, Miami, FL 33175

Septic permits

Florida Department of Health in Miami-Dade County (Onsite Sewage Tanks and Disposal Systems)

Permits and inspects onsite sewage treatment and disposal systems (septic) in Miami-Dade County under Florida's Clean Waterways Act of 2020

786-654-6620

[email protected]

Online permits →

Also useful

Miami-Dade Division of Environmental Resources Management (DERM), Water and Wastewater Section

Reviews and approves new and replacement septic systems under county Ordinance No. 22-83, which pushes systems that hadn't obtained a building permit by January 1, 2023 toward advanced treatment standards

305-372-6789

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 unincorporated Miami-Dade County, Florida?

Unincorporated Miami-Dade County, Florida requires a permit before most construction, remodeling or repair, and the county's Building Division reviews plans against the Florida Building Code, zoning and safety standards before issuing one¹². Florida's statewide code sets the baseline: the state adopted the Florida Building Code, 8th Edition (2023), as its building code, with updates approved through December 9, 2025, and Miami-Dade enforces it directly rather than writing its own separate code¹². Florida law generally gives counties this authority: a permit is required before construction, alteration or demolition of a building, issued by the appropriate enforcing agency, which is why Miami-Dade's own Building Division -- not a state office -- issues the permit¹³.

Who issues building and zoning permits in Miami-Dade County, and how do you reach them?

Two Miami-Dade offices matter most for a land buyer. Building permits run through Regulatory and Economic Resources (RER) at the Herbert S. Saffir Permitting and Inspection Center, 11805 SW 26 Street, Miami, FL 33175, phone 786-315-2000². Zoning questions and the Zoning Improvement Permit (ZIP) go through RER's Development Services Division at the same address, reached at 786-315-2660 for ZIP assistance⁴. If a septic system needs review under county Ordinance No. 22-83, RER directs you to the DERM Water and Wastewater Section at 305-372-6789⁶. The septic permit itself, though, comes from a separate agency entirely: the Florida Department of Health in Miami-Dade County, reached at 786-654-6620 or [email protected]¹⁴.

Does Miami-Dade County have zoning, and what needs a Zoning Improvement Permit (ZIP)?

Miami-Dade County zones unincorporated land, and a Zoning Improvement Permit (ZIP) issued by RER's Development Services Division confirms a project complies with its zoning district's rules on land use, height, coverage and setbacks³. A ZIP is required for a specific list of smaller improvements, including above-ground pools, commercial cargo containers, decorative garden fountains, a flat wall sign up to 40 square feet, and, importantly, a trailer or modular unit used temporarily during construction⁴. Because zoning here is real and enforced, don't assume rural-sounding land is free of use, height or setback rules the way it might be in a Texas or Oklahoma county with no zoning ordinance; look up your specific zoning district on the county's GIS map before you plan anything³⁴.

How do septic permits work in Miami-Dade County?

Septic (OSTDS) permits in Miami-Dade County are issued by the Florida Department of Health in Miami-Dade County, which continues to handle permitting and inspection for septic tanks locally rather than through a state regional office⁵. On top of that state permit, county Ordinance No. 22-83 requires the DERM Water and Wastewater Section to review and approve new and replacement systems, and any septic tank that hadn't already obtained a building permit by January 1, 2023 must meet advanced treatment standards under that ordinance, regardless of when its application was submitted⁵⁶. Statewide, Florida requires a permit for the construction, installation, modification, abandonment or repair of an OSTDS, with a site evaluation required first to confirm the system suits the property¹⁵. None of Miami-Dade County's soils are rated free of severe limits for a conventional drain field, so between the soils and Ordinance No. 22-83⁵, plan on an engineered or advanced-treatment system almost anywhere in unincorporated Miami-Dade rather than a basic one¹⁶.

Can you live in an RV, trailer or modular unit on your land in Miami-Dade County?

Miami-Dade County's own sources don't spell out a single countywide answer for living in an RV or tiny home on unincorporated land; it depends on your zoning district, which is also why a trailer or modular unit set up temporarily during construction needs its own Zoning Improvement Permit (ZIP) from Development Services⁴. If you're placing a manufactured home instead, Florida requires an onsite inspection for compliance with installation standards, and a certificate of occupancy is issued only after that inspection finds it compliant, on top of whatever local zoning, setback and site-development rules Miami-Dade otherwise applies⁸. A recreational vehicle can be occupied as a transient guest in a licensed RV park permitted annually by the Florida Department of Health, but that licensing framework doesn't say anything about parking and living in an RV on your own parcel outside such a park, so confirm with Development Services before you count on it¹⁷. Because Miami-Dade actually zones unincorporated land, unlike many rural counties elsewhere, don't assume an answer here without checking your parcel's specific zoning district first³.

Building on land in Miami-Dade County: the steps, in order

Look up your parcel's zoning district on Miami-Dade's interactive GIS map before you plan any structure, since the county actually zones unincorporated land³.
Apply for your building permit through RER at the Herbert S. Saffir Permitting and Inspection Center, 11805 SW 26 Street, Miami, FL 33175, phone 786-315-2000².
If your project involves a smaller improvement such as an above-ground pool, a sign, or a temporary trailer or modular unit during construction, apply separately for a Zoning Improvement Permit (ZIP), or call Development Services at 786-315-2660 with questions⁴.
Start your septic process with the Florida Department of Health in Miami-Dade County at 786-654-6620; expect a site evaluation before any permit issues¹⁴¹⁵.
If your septic falls under county Ordinance No. 22-83's advanced-treatment requirement, coordinate with the DERM Water and Wastewater Section at 305-372-6789⁶.
Budget for property tax: Miami-Dade's effective rate runs about 0.8%, with a median bill around $3,516 a year¹⁰¹¹.

What to check before you buy land in Miami-Dade County, Florida

None of Miami-Dade County's soils are rated free of severe limits for a conventional septic drain field, and county Ordinance No. 22-83 pushes many systems toward advanced treatment, so budget for an engineered system and get a site evaluation early¹⁶⁵. About 57% of the county is federal land, largely Everglades and Big Cypress conservation land, so confirm your specific parcel's boundary and any environmental overlay before you buy anything that looks remote⁹. Terrain is flat and easy to build on, with about 99.1% of the county at 15% slope or less, but the county averages about 57.5 inches of precipitation a year, and Florida's threshold-building rules require a special inspector for structural inspections on qualifying larger buildings¹⁸¹⁹²⁰. Insurance is the other big number to plan for: a typical home insurance premium here runs around $7,089 a year, well above what you'd see in most rural counties, alongside a roughly 0.8% effective property tax rate and a median bill near $3,516²¹¹⁰¹¹. Population density averages about 1,414.2 people per square mile across roughly 2,686,867 residents countywide, though a rural or agricultural parcel out toward the Everglades will feel nothing like that average²²²³.

Watch-outs

Miami-Dade County doesn't document a countywide owner-builder exemption; if you plan to act as your own contractor, confirm directly with RER's Building Division rather than assuming a general Florida rule automatically applies here⁷².
A temporary trailer or modular unit on a construction site needs its own Zoning Improvement Permit (ZIP), not just a building permit, so apply for both before you set one up⁴.
If your septic tank hadn't already obtained a building permit by January 1, 2023, county Ordinance No. 22-83's advanced-treatment standard applies regardless of when you submit your application, so budget for that system upfront rather than assuming a basic drain field will pass⁶.

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 Miami-Dade County scores

Seclusion13100% ev.

Self-Sufficiency3291% ev.

Admin Boringness3990% ev.

Durability70100% ev.

Property Autonomy91100% ev.

Carry Cost39100% ev.

Evidence strength: 96%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$523kTypical home

0.8%Property tax

$50,161Land / acre

57.5"Annual rain

5.9% of yrsSevere drought

0.6 / yr (+0.6)Mid-century 100°F days

15.1 daysMid-century dry spell

2.68" (+2%)Mid-century 1-day rain

1.01×Wildfire change factor

100%Forward climate coverage

$7,089Home insurance / yr

0.7% / yrInsurance growth

0.33%Nonrenewal rate

county median (2+ published ZIPs)Insurance basis

166,520People within 30 min

5,938,019People within 2 hr

1,705,458Radius comparison (15 mi)

1,414.2People / sq mi

57%Federal land

99.1%Land at 15% slope or less

0%Septic soil without severe limits

0 acWorkable land screen

76.3°FAvg temp

Answers from the rulebook for Miami-Dade County

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

Miami-Dade County rules

Building permitRequired
New structures, building changes, repairs, and demolitions in unincorporated Miami-Dade County.
- Some projects may be exempt from a building permit but may require a Zoning Improvement Permit.
- Incorporated municipalities administer permits within their city limits.
“A building permit is required to build a new structure, make changes, repairs, and/or demolish a building.”
Homeowners General Permit Information ↗Re-checked Sep 25, 2026
Owner-builder exemptionAvailable (with conditions)
Residential property owners acting as their own general contractor for permitted work.
- The owner must pull the proper permits.
- The owner may perform the work and/or hire licensed subcontractors.
- An owner-builder responsibility acknowledgment must be signed before permit issuance.
“In Miami-Dade County, homeowners may be considered owner/builders – meaning, you may act as your own general contractor”
Homeowners General Permit Information ↗Re-checked Sep 25, 2026
Building code adoptedAdopted (with conditions)
Building-code review administered by Miami-Dade County.
- The county page states it is currently using the 8th Edition Florida Building Code.
- The 9th Edition (2026) becomes effective December 31, 2026; permit applications submitted on or after that date must comply with it.
current code edition: 8th Edition Florida Building Code (subject to the stated 2026 transition date)
“Miami-Dade County is currently using the 8th Edition of the Florida Building Code.”
Homeowners General Permit Information ↗Re-checked Sep 25, 2026
InspectionsRequired
New construction, remodeling, renovation, and applicable trade work in unincorporated Miami-Dade County.
- Inspections are required before covering or concealing construction.
- Required inspection categories depend on the permit and may include building, zoning, fire, electrical, mechanical, plumbing, and roofing inspections.
“Inspections are required for new construction, remodeling/renovations, and other mechanical, electrical and plumbing work.”
Inspections ↗Re-checked Sep 25, 2026
Zoning districtsPublished (with conditions)
Zoning-district classifications and associated development parameters in unincorporated Miami-Dade County.
- Each property is assigned a zoning-district classification.
- Applicable height, area, open-space, setback, and use conditions vary by the assigned district.
“Each property within Miami-Dade County is assigned a zoning district classification indicating the permitted land use activities and the conditions”
Homeowners General Permit Information ↗Re-checked Sep 25, 2026
SetbacksSpecified
Development in unincorporated Miami-Dade County zoning districts.
- Setbacks vary by zoning district and property.
- The county directs applicants to use the Land Management map or contact Zoning for the applicable property-specific requirements.
“Each property within Miami-Dade County is assigned a zoning district classification indicating the permitted land use activities and the conditions, such as height, area, open space and setbacks”
Homeowners General Permit Information ↗Re-checked Sep 25, 2026
Accessory dwellingsAllowed (with conditions)
Accessory dwelling units in unincorporated Miami-Dade County.
- A site plan showing the ADU is required for zoning and site-specific review.
- Permit application and plans must be submitted for county review and final approval.
- Certificate of Use materials state that ADUs in single-family zoned districts must meet applicable requirements and require an owner disclosure statement.
“Owners of residences located in single-family zoned districts meeting certain requirements can either build out a new unit or remodel part of their home”
Accessory Dwelling Unit (ADU) Blueprint for Homeowners ↗Re-checked Sep 25, 2026
Short-term rentalsLimited
Short-term vacation rentals in unincorporated Miami-Dade County.
- A short-term vacation rental is a dwelling or residence rented to a transient occupant for less than 30 days or one calendar month, whichever is less.
- A Certificate of Use is required and must be reapplied for annually.
rental period threshold: < 30 days (or one calendar month, whichever is less)
“This type of CU may only be obtained online and must be reapplied for annually.”
Certificate of Occupancy and Certificate of Use ↗Re-checked Sep 25, 2026
Permit feesPublished (with conditions)
Miami-Dade County building permits and related agency reviews.
- Fees vary by permit type, work performed, home type, square footage, and estimated project value.
- The revised fee schedule was adopted June 30, 2025 and became effective October 1, 2025.
- Additional fees may be assessed by DTPW, Development Services, DERM, Fire Rescue, WASD, and the State of Florida for septic tanks.
revised fee schedule effective date: 2025-10-01 (adopted June 30, 2025)
“Effective Oct. 1, 2025 the Building Division will be implementing a revised fee schedule adopted by the Board of County Commissioners on June 30, 2025.”
Building Fee Schedules, Refunds & Cancellations ↗Re-checked Sep 25, 2026
County-wide zoningPresent
Miami-Dade County zones the unincorporated area; a Zoning Improvement Permit (ZIP) issued by the Development Services Division confirms compliance with zoning district regulations on land use, height, coverage, and setbacks.
Miami-Dade County - Zoning Improvement Permit (ZIP) ↗Scouted from the county site, not yet independently re-checked

Florida rules that apply here

Certificate of occupancyRequired
Projects using Florida’s private-provider building-code inspection process after completion of required inspections.
- The applicant must submit a request for a certificate of occupancy or certificate of completion, the private provider’s certificate of compliance, all other government approvals required by law, and outstanding fees.
- The local building official must issue the certificate or identify incomplete forms or documents within 10 business days, or within 2 business days for a permit relating to a single-family or two-family dwelling.
- If the official does not provide timely notice of incomplete forms or documents, the request is automatically granted and deemed issued on the next business day; the written certificate must then be provided within 10 days.
local official response deadline: 10 business days (2 business days for a permit relating to a single-family or two-family dwelling) · automatic issuance timing after missed deadline: next business day · written certificate after automatic issuance: 10 days
“the local building official shall issue the certificate of occupancy or certificate of completion”
Florida Statutes § 553.791 — Private-provider inspections and certificates of occupancy ↗Re-checked Sep 9, 2026
Minimum dwelling sizeSpecified
Habitable attics in residential dwellings governed by the Florida Building Code, Residential, 8th Edition (2023).
- The cited provision concerns habitable attics and requires compliance with the applicable ceiling-height requirement in Section R305.
- The occupiable space must be enclosed by the roof assembly above, knee walls if applicable, on the sides, and the floor-ceiling assembly below.
minimum occupiable floor area: >= 70 square feet
“The occupiable floor area is not less than 70 square feet, in accordance with Section R304.”
Florida Building Commission Building Codes ↗Re-checked Sep 26, 2026
Camping on your landLimited
Temporary camping conducted as a recreational camp regulated under Florida Statutes Chapter 513.
- The operator must obtain a Florida Department of Health permit before establishing or maintaining the recreational camp.
- The camp must satisfy statutory and Department of Health requirements and inspection standards.
- This claim does not resolve camping on private land outside a regulated recreational camp.
permit renewal: annually · permit fee per space: 3.50-6.50 USD (Until rules setting fees are adopted, the fee is $3.50 per space.) · total permit fee: 50-600 USD (A recreational camp fee is based on an equivalency rate for which two camp occupants equal one space.)
“recreational camp in this state without first obtaining a permit from the department.”
Florida Statutes Chapter 513: Mobile Home and Recreational Vehicle Parks ↗Re-checked Sep 9, 2026
Manufactured homesAllowed (with conditions)
An off-site-constructed residential dwelling, including a manufactured home constructed in whole or in part off site and treated as real property, in a zoning district where single-family detached dwellings are allowed.
- The dwelling must be permitted as of right in a district where single-family detached dwellings are allowed.
- Local governments may apply generally applicable architectural, aesthetic, design, setback, height, or bulk standards only when those standards are applied uniformly to all single-family dwellings in the same district.
- Compatibility or design standards must be reasonable, may not exclude off-site-constructed residential dwellings, and must apply equally to single-family site-built dwellings.
- The statute does not authorize occupancy without compliance with applicable building, permitting, installation, health, utility, or other generally applicable requirements.
“An off-site constructed residential dwelling must be permitted as of right in any zoning district where single-family detached dwellings are allowed.”
Florida Statutes § 553.385, Zoning of off-site constructed residential dwellings; parity ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Limited — Occupancy of a manufactured/mobile home installed in Florida.
  “each mobile home shall be issued a certificate of occupancy if the mobile home complies with department rules regarding the installation of mobile homes.”
  Florida Statutes § 320.8285: Onsite inspection ↗Re-checked Sep 9, 2026
Who permits septicMixed (with conditions)
Florida's statewide OSTDS program, including permitting, inspections, and enforcement.
- DEP has statewide responsibility for implementing and enforcing Florida OSTDS laws and rules.
- DEP permitting and inspections have transitioned for 16 Panhandle counties and Marion County.
- Outside the transitioned counties, local county health departments continue handling septic permitting and inspections.
- The FAQ states that transition of the remaining 50 counties depends on legislative approval.
“DEP is permitting OSTDS in Northwest Florida and Marion County. The transition of the remaining 50 counties will occur depending on legislative approval.”
Onsite Sewage FAQ - Permitting ↗Re-checked Sep 26, 2026
2 more reviewed findings on this topic
- Mixed — Statewide onsite sewage treatment and disposal system permitting and enforcement in Florida.
  “During the transition period, applicants will apply for permits and services in two separate ways, depending on in which county they are requesting a permit.”
  Onsite Sewage & Septic ↗Re-checked Sep 26, 2026
- Mixed — Statewide OSTDS regulation, enforcement, permitting, and inspection in Florida.
  “The Onsite Sewage Treatment and Disposal System (OSTDS) permitting program has implemented the first phase of the transition from the Florida Department of Health (DOH) to the Florida Department of Environmental Protection (DEP). DEP is permitting OSTDS in Northwest Florida and Marion County. The transition of the remaining 50 counties will occur depending on legislative approval.”
  Onsite Sewage Program ↗Re-checked Sep 26, 2026
Septic permitRequired
Construction, installation, modification, abandonment, or repair of an OSTDS or septic tank system in Florida.
- The official application information states that a permit application is required by Florida law for any OSTDS or septic tank system.
- Permitting authority and application submission location depend on the county.
- DEP permits in the transitioned counties; local county health departments issue permits elsewhere.
- A site evaluation and required application materials are part of the process.
- Many counties may have local ordinances exceeding state OSTDS requirements.
“A permit application for any onsite sewage treatment and disposal (OSTDS or septic tank) system is required by Florida law.”
OSTDS Application Information ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Required — Installing, replacing, repairing, modifying, or abandoning an onsite sewage treatment and disposal system in Florida.
  “the department shall issue permits for the construction, installation, modification, abandonment, or repair of onsite sewage treatment and disposal systems”
  OSTDS Construction Application ↗Re-checked Sep 9, 2026
Septic inspectionRequired
OSTDS construction and final-installation approval statewide.
- Department or authorized private-provider inspection is used for construction approval.
- Private-provider inspection is optional for owners or contractors with owner authorization; the department retains final review and approval.
- Private-provider inspection results must be submitted within 7 calendar days, with required photographs and a $35 inspection-review fee for each report resulting in construction approval.
private-provider result submission deadline: 7 calendar days · inspection review fee: 35 USD per inspection report resulting in construction approval
“As of July 1, 2022, owners or contractors with owner authorization have the option to hire a private provider to perform inspections of onsite sewage treatment and disposal systems (OSTDS).”
Onsite Sewage Program ↗Re-checked Sep 26, 2026
Well permitLimited
Construction, repair, or abandonment of drinking-water wells in Florida.
- The five water management districts typically oversee drinking-water well construction, repair, and abandonment.
- Some water management districts delegate well permitting to county health departments or other local agencies.
- The Florida Department of Environmental Protection establishes statewide water-well construction requirements through section 373.309 and Chapter 62-532, F.A.C.
- County health departments delegated to perform well permitting include Baker, Brevard, Broward, Clay, Miami-Dade, Flagler, Glades, Hendry, Highlands, Indian River, Lake, Marion, Martin, Nassau, Okeechobee, Orange, Osceola, Palm Beach, Putnam, St. Lucie, Sarasota, and Volusia.
- Well-contractor licensure is distinct from any construction permit requirement; licensed water-well contractors are required for persons engaging in the business of constructing, repairing, or abandoning wells.
“The construction, repair, or abandonment of drinking water wells is typically overseen by the five water management districts. Some of these districts have delegated authority to county health departments or other local agencies.”
Well Construction in Florida ↗Re-checked Sep 26, 2026
2 more reviewed findings on this topic
- Required — Construction, repair, or abandonment of water wells in Florida.
  “Additionally, a permit must be obtained from the appropriate WMD or its delegated permitting authority prior to the construction, repair or abandonment of any water well.”
  Water Well Contractor Licensing and Permitting ↗Re-checked Sep 26, 2026
- Required — Construction, repair, or abandonment of any water well statewide.
  “Additionally, a permit must be obtained from the appropriate WMD or its delegated permitting authority prior to the construction, repair or abandonment of any water well.”
  Water Well Contractor Licensing and Permitting ↗Re-checked Sep 26, 2026
Mandatory utility hookupConditional
Existing onsite sewage treatment and disposal systems when an available publicly owned or investor-owned sewerage system exists.
- A properly functioning OSTDS, excluding an approved onsite graywater system, must connect within 365 days after written notification that the sewerage system is available.
- The sewerage system must provide at least one year’s advance notice of anticipated availability and notify the owner that connection will be required within one year of actual availability.
- An OSTDS needing repair or modification to function sanitarily or comply with applicable law must connect within 90 days after written notification from the department.
- In hardship cases, the department may approve one extension of not more than 90 days.
- A sewerage system may waive mandatory connection with department approval when connection is not required in the public interest due to public-health considerations.
- A local government or water-and-sewer district may grant a variance for a properly functioning, department-permitted performance-based OSTDS, but is not required to do so in the listed protected areas.
connection deadline for properly functioning system: 365 days (After written notification of availability.) · connection deadline for system needing repair or modification: 90 days (One hardship extension of not more than 90 days may be approved.) · advance notice of anticipated availability: >= 1 year · maximum installment period for prepaid connection charges: <= 2 years · maximum hardship installment period for investor-owned sewer connection fee: <= 5 years (Requires local governing body determination of financial hardship.)
“The owner of a properly functioning onsite sewage treatment and disposal system, excluding an approved onsite graywater system, must connect the system or the building’s plumbing to an available publicly owned or investor-owned sewerage system within 365 days after written notification by the owner of the publicly owned or investor-owned sewerage system that the system is available for connection.”
2026 Florida Statutes, section 381.00655 ↗Re-checked Sep 26, 2026
2 more reviewed findings on this topic
- Conditional — Existing properly functioning OSTDS when a publicly owned or investor-owned sewerage system becomes available, and systems needing repair or modification.
  “The owner of a properly functioning onsite sewage treatment and disposal system, excluding an approved onsite graywater system, must connect the system or the building’s plumbing to an available publicly owned or investor-owned sewerage system within 365 days after written notification by the owner of the publicly owned or investor-owned sewerage system that the system is available for connection.”
  Florida Statutes § 381.00655 ↗Re-checked Sep 26, 2026
- Conditional — Existing properly functioning OSTDS when an available publicly owned or investor-owned sewerage system becomes available.
  “The owner of a properly functioning onsite sewage treatment and disposal system, excluding an approved onsite graywater system, must connect the system or the building’s plumbing to an available publicly owned or investor-owned sewerage system within 365 days after written notification by the owner of the publicly owned or investor-owned sewerage system that the system is available for connection.”
  Florida Statutes § 381.00655 ↗Re-checked Sep 26, 2026
Agricultural exemptionConditional
Nonresidential farm buildings, farm fences, and farm signs located on lands used for bona fide agricultural purposes in Florida.
- The land must be used for bona fide agricultural purposes.
- The exemption does not apply to lands used for urban agriculture.
- The exemption is from the Florida Building Code and county or municipal code or fee.
- Floodplain-management code provisions remain applicable, including local, state, or federal provisions.
- A farm sign on a public road remains subject to the standards listed in Florida Statutes § 479.11(4), (5)(a), and (6)-(8).
- A nonresidential farm building is not intended to be used as a residential dwelling.
- The statutory definition includes temporary or permanent buildings or support structures used primarily for agricultural purposes and located on land integral to a farm operation or classified as agricultural land under § 193.461; examples include a barn, greenhouse, shade house, farm office, storage building, or poultry house.
“any nonresidential farm building [...] is exempt from the Florida Building Code and any county or municipal code or fee”
Florida Statutes § 604.50, Nonresidential farm buildings; farm fences; farm signs ↗Re-checked Sep 26, 2026
2 more reviewed findings on this topic
- Available (with conditions) — Nonresidential farm buildings, farm fences, and farm signs located on lands used for bona fide agricultural purposes statewide in Florida.
  “any nonresidential farm building, farm fence, or farm sign [...] is exempt from the Florida Building Code and any county or municipal code or fee”
  Florida Statutes § 604.50, Nonresidential farm buildings; farm fences; farm signs ↗Re-checked Sep 26, 2026
- Available (with conditions) — Nonresidential farm buildings, farm fences, and farm signs located on lands used for bona fide agricultural purposes in Florida.
  “any nonresidential farm building, farm fence, or farm sign [...] is exempt [...] except for code provisions implementing local, state, or federal floodplain management regulations.”
  F.S. 604.50 — Nonresidential farm buildings; farm fences; farm signs ↗Re-checked Sep 26, 2026
Subdividing landRegulated (with conditions)
Subdivision and platting of land statewide in Florida, subject to the state minimum requirements and additional local regulation.
- Florida Statutes Chapter 177 establishes minimum platting requirements.
- Local ordinances, laws, or regulations may impose additional provisions or regulations.
- A plat offered for recording must be prepared, signed, and sealed by a professional surveyor and mapper.
- Before approval, the plat must be reviewed for conformity by a professional surveyor and mapper employed by or under contract to the local governing body, with costs borne by the entity offering the plat for recordation.
- A subdivision plat filed for record must contain the required dedication and obtain governing-body approval.
“This part establishes minimum requirements and does not exclude additional provisions or regulations by local ordinance, laws, or regulations.”
Florida Statutes Chapter 177, Land Boundaries ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Regulated (with conditions) — Subdivision of land in Florida through county and municipal land-development regulations and the statutory platting process.
  “Local land development regulations shall contain [...] and shall at a minimum:(a) Regulate the subdivision of land.”
  F.S. 163.3202 — Land development regulations ↗Re-checked Sep 26, 2026
Permit processPublished (with conditions)
Building permit applications submitted to Florida local governments.
- The application must be complete and sufficient.
- The applicant may waive the statutory timeframes in writing.
- For an existing single-family dwelling with work valued below $15,000, the listed permit types have a 5-business-day timeframe.
- Applications for structures below 7,500 square feet generally have a 30-business-day timeframe; structures 7,500 square feet or more generally have a 60-business-day timeframe.
- The local government must provide written notice within 5 business days if information is needed to deem the application complete; failure to provide timely notice automatically deems the application properly completed and accepted.
- A local ordinance may provide more stringent timeframes.
- If deadlines are missed, fee reductions apply, subject to written extensions, applicant-caused delay, force majeure, extraordinary circumstances, or timely written notice of code deficiencies.
- If deficiencies are noticed, the applicant has 10 business days to submit revisions; the agency then has 10 business days to approve or deny after receiving revisions.
initial completeness notice: 5 business days (unless the local government timely notifies the applicant that the application is incomplete) · existing single-family dwelling permit review: 5 business days (work value less than $15,000 and listed permit types) · permit review for structure less than 7,500 square feet: 30 business days (listed permit types using a local government plans reviewer) · permit review for structure 7,500 square feet or more: 60 business days (listed permit types using a local government plans reviewer)
“A local government must approve, approve with conditions, or deny a building permit application after receipt of a completed and sufficient application within the following timeframes, unless the applicant waives such timeframes in writing:”
F.S. 553.792 — Building permit application to local government ↗Re-checked Sep 26, 2026
Campground & park staysAllowed (with conditions)
Occupancy of recreational vehicles as transient accommodations in Florida recreational vehicle parks and recreational camps regulated by Chapter 513.
- The park or camp must obtain a permit from the Florida Department of Health before establishment or operation.
- The permit must be renewed annually.
- This claim does not establish statewide private-land zoning permission outside regulated parks or camps.
park/camp permit renewal: annually
“a recreational vehicle park that rents to transient guests”
Florida Statutes Chapter 513: Mobile Home and Recreational Vehicle Parks ↗Re-checked Sep 9, 2026
county zoning authorityGeneral
Florida counties' authority to establish, coordinate, and enforce zoning, including zoning of unincorporated county areas, subject to general and special law.
- The county power is subject to general or special law.
- The zoning and business regulations may not include the prohibitions in Florida Statutes § 377.8161.
- This statewide authority grant does not identify a population threshold, named-county limitation, lake, military-base, reservoir, or similar geographic limitation.
“Establish, coordinate, and enforce zoning and such business regulations as are necessary for the protection of the public”
Florida Statutes § 125.01, Powers and duties ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- General — Florida counties adopting and enforcing zoning regulations for county territory, including unincorporated areas.
  “Establish, coordinate, and enforce zoning and such business regulations as are necessary for the protection of the public, to the extent such zoning and business regulations do not include the prohibitions in s. 377.8161.”
  Florida Statutes § 125.01 — Powers and duties ↗Re-checked Sep 26, 2026
county building authorityGeneral
Florida counties requiring building permits and enforcing the Florida Building Code for residential and other construction within county territory outside incorporated municipalities.
- The board of county commissioners may enforce the Florida Building Code and Florida Fire Prevention Code and may adopt local technical amendments at its discretion.
- The authority described in § 125.56(1) applies within county territory outside the corporate limits of any municipality.
- After adoption of the applicable code or amendment, construction, erection, alteration, repair, securing, or demolition requires a permit from the appropriate county authority, subject to reasonable fees.
- An adopted amendment remains in force throughout the county's unincorporated area until otherwise notified by the Florida Building Commission or State Fire Marshal.
- A county may provide a schedule of reasonable inspection fees and employ building-code inspectors and other necessary personnel.
“The board of county commissioners of each of the several counties of the state may enforce the Florida Building Code and the Florida Fire Prevention Code as provided in ss. 553.80, 633.206, and 633.208 and, at its discretion, adopt local technical amendments to the Florida Building Code as provided in s. 553.73(4) and local technical amendments to the Florida Fire Prevention Code as provided in s. 633.202 to provide for the safe construction, erection, alteration, repair, securing, and demolition of any building within its territory outside the corporate limits of any municipality.”
Florida Statutes § 125.56 — Enforcement and amendment of the Florida Building Code ↗Re-checked Sep 26, 2026

Still unanswered

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

Minimum lot size — Minimum lot size in unincorporated Miami-Dade County.
Lot coverage — Lot coverage in unincorporated Miami-Dade County.
Living in an RV — Residential or long-term RV occupancy on land in Miami-Dade County.
Tiny homes — Tiny-home occupancy in Miami-Dade County.
Off-grid sanitation — Off-grid sanitation systems in Miami-Dade County.

1 more unanswered

Building in a floodplain

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 Miami-Dade County, Florida

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

Miami-Dade County scores 35/100 on the Bolthole Index, a marginal county profile. Its strengths: a stronger property-autonomy legal backdrop and 57% federal land exposure. Watch-outs: about 166,520 people within a 30-minute drive and strong self-sufficiency basics: 57.5″/yr rainfall with little drought.

Do you need a building permit in Miami-Dade County, Florida?

Miami-Dade County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Florida Department of Health in Miami-Dade County (OSTDS); county DERM/Water & Wastewater review under Ordinance 22-83. 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.

How much does land cost in Miami-Dade County, Florida?

Land in Miami-Dade County runs about $50,161 per acre, based on the latest county data.

What is the water situation in Miami-Dade County?

Miami-Dade County gets about 57.5" of rain a year, with severe drought in roughly 5.9% of years.

How remote is Miami-Dade County?

A representative private-land location has about 166,520 people within a 30-minute drive and 5,938,019 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 Miami-Dade County, Florida