Washington County, MN Building Permits & Zoning

Building permits in Washington County, Minnesota are required, but the city or township where the property is located issues them, not the county¹². The Washington County Development Code controls unincorporated areas, while parcels outside county map coverage must get zoning information from their township³⁴. Washington County handles septic permits⁵.

At a glance

Building permit: Required; issued by your city or township, not the county¹²
Zoning: Yes in unincorporated areas; township or city controls may apply elsewhere³⁴
Septic permits: Washington County Public Health and Environment (SSTS)⁵
Owner-builder exemption: Available if you occupy the home yourself, not for resale or speculation⁶⁷
Driveway/access permit: Washington County Public Works; $150 for a residential driveway plus a refundable deposit²
Septic install permit: $868 for a single-family system⁸
Inspections: Any permitted work is subject to inspection and can't be covered until approved⁹
Septic soils: Only 6.6% of soils rate free of severe limits for a conventional drain field¹⁰

Who to call

Zoning

Washington County Public Works Department - Planning & Zoning

Administers the Washington County Development Code, which zones the county's civil townships and unincorporated areas; issues zoning permits and maintains zoning maps

651-430-4300

11660 Myeron Road North, Stillwater, MN 55082

Roads & driveways

Washington County Public Works Department - Access Permits

Issues access permits for new driveways, field entrances and street connections onto Washington County highways; the county's own guidance directs building-permit questions to the city or township where the property sits

651-430-4300

11660 Myeron Road North, Stillwater, MN 55082

Septic permits

Washington County Public Health and Environment - Septic (SSTS)

Permits, inspects and enforces compliance for on-site septic (SSTS) systems countywide, including new installation, repair, abandonment and point-of-sale compliance inspections

651-430-6655

[email protected]

Washington County Government Center, Room 4600, 14949 62nd Street North, Stillwater, MN 55082

Online permits →

Contact details are copied from each office’s official page and were checked against it on September 27, 2026.

Do you need a building permit in Washington County, Minnesota?

Yes, but Washington County itself does not issue it. The county's own guidance says plainly: "Building Permits To obtain a building permit, contact the city or township in which the property is located"². Minnesota's State Building Code applies statewide and supersedes any municipal code, and construction covered by a permit is subject to inspection by the building official¹¹⁹. An owner of residential real estate who personally builds or improves it, and intends to occupy it rather than resell or speculate, is exempt from Minnesota's residential contractor licensing requirement — but that exemption doesn't waive the permit, inspection or zoning process itself⁶⁷.

Who handles zoning, septic and driveway permits in Washington County, and how do you reach them?

Washington County Public Works administers the Development Code in unincorporated parts of Washington County³¹². The county publishes zoning maps for Baytown, Denmark, Grey Cloud Island, May, Stillwater and West Lakeland townships, but the maps are only references; a property outside a shaded area must get zoning information directly from the township¹³¹⁴. Washington County Public Works also issues access permits for a new driveway, field entrance or street connection onto a county highway². Washington County Public Health and Environment is the separate county office for septic permits⁵. Call the zoning and road offices at 651-430-4300, or reach the septic program at 651-430-6655 or [email protected]¹⁴²⁸.

Does Washington County have zoning, and what does that mean for RVs, tiny homes and setbacks?

Yes. The Washington County Development Code controls unincorporated parts of Washington County, while incorporated municipalities may have their own controls³¹². Published county maps identify districts in Baytown, Denmark, Grey Cloud Island, May, Stillwater and West Lakeland townships, but a parcel outside a shaded area must get zoning information directly from its township¹³. The available sources do not establish one countywide answer for setbacks, minimum lot size, minimum dwelling size, RV occupancy or tiny-home occupancy, so ask the zoning authority for the parcel before designing or buying. Minnesota's recreational-camping license applies to an area accommodating five or more tents or recreational camping vehicles, not automatically to one RV on a private residential lot¹⁵. A new manufactured home installed for occupancy in Minnesota must receive the federal-standard installation inspection¹⁶.

How do septic permits work in Washington County?

Washington County Public Health and Environment issues septic (SSTS) permits and requires licensed professionals for design, installation and inspection⁵. A single-family dwelling installation permit costs $868, and a non-single-family or commercial installation permit costs $1,298; a soil and site review application runs $237 plus $102 per lot⁸. If you start installing without a permit, the county adds a $343 penalty on top of the regular fee⁸. Before you sell or transfer land with a septic system, you generally need a compliance inspection — unless one was already completed within the last 3 years, or a new system was installed within the last 5 years and still has a valid certificate of compliance⁸. Statewide, most septic systems are permitted locally by the county, city or township; only large systems designed for more than 10,000 gallons a day need a state MPCA permit instead¹⁷. Before you buy, know that only 6.6% of Washington County's soils rate free of severe limits for a conventional drain field, so a soil and site review is worth doing before you close¹⁰.

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

Minnesota requires a state Department of Health license for any recreational camping area hosting five or more tents or RVs, with special-event areas capped at two operating periods a year of no more than 14 consecutive days — but that licensing scheme governs commercial and organized camping areas, not a single RV parked on your own residential lot¹⁵. Whether your specific parcel's zoning district allows year-round RV or tiny-home living is a question for Washington County Public Works if the county administers your township's zoning, or your own township or city if it doesn't¹⁴. If you're off municipal sewer, sanitary waste from a tiny home or RV must still go to a permitted septic system; Minnesota's rules for primitive dwellings only cover how a privy's septage gets disposed of, not a general right to skip septic permitting¹⁸⁸. A manufactured home needs a federal installation inspection regardless of where the parcel sits¹⁶.

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

Confirm whether Washington County Public Works or your own township/city administers zoning for your parcel, and check your district's setbacks and minimum lot size before you buy¹⁴.

Have Washington County Public Health and Environment review your soil and site for septic; the review fee is $237 plus $102 per lot, and a single-family installation permit is $868⁸.

If your driveway or field entrance will connect to a county highway, apply for an access permit from Washington County Public Works; a residential driveway permit is $150 plus a refundable deposit².

Apply for your building permit with the city or township where the property is located, since Washington County does not issue building permits itself².

Keep the work accessible for inspection at each stage the building official requires; noncomplying work can't be covered or concealed until it's corrected and approved⁹.

If a floodplain, wetland or shoreland is anywhere near your site, check whether a floodplain development permit applies before you place fill or build — Minnesota requires one for projects like building a house or placing fill in the floodplain¹⁹.

What to check before you buy land in Washington County

Washington County's typical home value is about $451,458, and the USDA farmland value is about $11,320 per acre²⁰²¹. Population density is about 725 people per square mile, and the nearest city of 100,000 or more is about 13 miles from the county center²²²³. About 44% of the county is wooded, while roughly 91% of its land has a slope of 15% or less²⁴²⁵. Washington County receives about 33 inches of precipitation annually, and severe drought occurs in about 7% of years²⁶²⁷. Only 6.6% of county soils rate free of severe limits for a conventional septic drain field, so complete the county's $237 soil review plus $102 per lot before relying on a conventional system¹⁰⁸. The effective property-tax rate is about 1%, the typical annual property-tax bill is about $4,012, and the typical home-insurance premium is about $2,468 a year²⁸²⁹³⁰. Before closing, identify the zoning authority, confirm septic feasibility, check floodplain constraints and determine which road authority controls access⁴⁵¹⁹³¹.

Watch-outs

Washington County publishes zoning maps for Baytown, Denmark, Grey Cloud Island, May, Stillwater and West Lakeland townships, but parcels outside shaded areas must get zoning information directly from the township¹³.
Washington County does not issue building permits; that comes from your city or township even on land the county zones directly²¹.
Whether you can live full-time in an RV on your own land in a specific Washington County township or city is not confirmed by any source in this guide; ask that jurisdiction's zoning office before you buy or move one in¹⁴.

Sources

Written September 27, 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 Washington County scores

Seclusion14100% ev.

Self-Sufficiency53100% ev.

Admin Boringness45100% ev.

Durability75100% ev.

Property Autonomy65100% ev.

Carry Cost46100% 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 →

$451kTypical home

1%Property tax

$11,320Land / acre

33"Annual rain

7.3% of yrsSevere drought

2.3 / yr (+2.3)Mid-century 100°F days

14.7 daysMid-century dry spell

1.71" (+4.9%)Mid-century 1-day rain

1.72×Wildfire change factor

100%Forward climate coverage

$2,468Home insurance / yr

2.8% / yrInsurance growth

0.47%Nonrenewal rate

county median (2+ published ZIPs)Insurance basis

573,159People within 30 min

4,972,795People within 2 hr

582,667Radius comparison (15 mi)

725People / sq mi

1.2%Federal land

90.5%Land at 15% slope or less

6.6%Septic soil without severe limits

12,858 acWorkable land screen

43.8%Wooded land

38 tonsBiomass / forest ac

45.1°FAvg temp

Answers from the rulebook for Washington County

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

Washington County rules

County-wide zoningPresent (with conditions)
Washington County Development Code controls in unincorporated parts of Washington County.
- The county code applies only to unincorporated areas and listed overlay or subject areas; incorporated municipalities may have their own controls.
“The 10 chapters in the Development Code are used to guide development in civil townships or unincorporated parts of the county.”
Zoning and Land Use ↗Re-checked Sep 25, 2026
Local zoningVaries (with conditions)
Aggregate of county, township, and municipal land-use controls across Washington County.
- The county's zoning maps identify districts for townships in county jurisdiction; properties outside the shaded areas require contacting the township directly.
- The county development code is described as applying in civil townships or unincorporated parts of the county.
“Zoning Maps identify the zoning districts for each township in Washington County's jurisdiction. If a property is outside of the shaded area, please contact the township directly for zoning information.”
Zoning and Land Use ↗Re-checked Sep 25, 2026
Zoning districtsPublished
Zoning districts and maps for Washington County townships and applicable unincorporated areas.
- The county zoning page identifies zoning districts for each township in county jurisdiction.
- Properties outside the shaded map areas require contacting the township directly.
“Zoning Maps identify the zoning districts for each township in Washington County's jurisdiction. If a property is outside of the shaded area, please contact the township directly for zoning information.”
Zoning and Land Use ↗Re-checked Sep 25, 2026
One more reviewed finding on this topic
- Partial — Published Washington County zoning maps identifying zoning districts for Baytown, Denmark, Grey Cloud Island, May, Stillwater, and West Lakeland townships within the county's jurisdiction.
  “Zoning Maps identify the zoning districts for each township in Washington County's jurisdiction. If a property is outside of the shaded area, please contact the township directly for zoning information. The maps should be used for reference purposes only. Baytown Township (PDF) Denmark Township (PDF) Grey Cloud Island Township (PDF) May Township (PDF) Stillwater Township (PDF) West Lakeland Township (PDF)”
  Zoning and Land Use | Washington County, MN ↗Re-checked Sep 25, 2026
Building permitRequired
Minnesota's statewide building code applies; the county directs residents to obtain building permits from the city or township where the property is located.
Washington County Permits ↗Scouted from the county site, not yet independently re-checked

Minnesota rules that apply here

Owner-builder exemptionAvailable (with conditions)
An owner of residential real estate who personally builds or improves residential real estate, as an exemption from the residential contractor licensing requirement.
- The owner must occupy or intend to occupy the residential real estate for residential purposes, or retain ownership for rental purposes after completion.
- The exemption does not apply when the owner constructs or improves residential real estate for resale or speculation.
- An owner is presumed to be building or improving for speculation if the owner constructs or improves more than one property within any 24-month period, unless the properties will be retained for rental purposes.
- This is a contractor-licensing exemption and does not waive applicable building permits, inspections, or certificates of occupancy.
speculation presumption threshold: > 1 additional property within 24 months (The presumption does not apply if the properties will be retained by the owner for rental purposes.)
“The license requirement does not apply to: [...] an owner of residential real estate who builds or improves residential real estate”
Sec. 326B.805 MN Statutes ↗Re-checked Sep 11, 2026
Building code adoptedAdopted (with conditions)
Construction, reconstruction, alteration, repair, and use of buildings and other structures of the type governed by the Minnesota State Building Code throughout Minnesota.
- The State Building Code supersedes the building code of any municipality.
- The State Building Code does not apply to agricultural buildings except for the state inspections and rulemaking identified in Minnesota Statutes section 326B.121, subdivision 1, paragraph (c), clause (1), and the structural-support requirement for translucent panels or other skylights without raised curbs in clause (2).
- The 2020 Minnesota State Building Code is effective March 31, 2020, except the Minnesota Mechanical Fuel Gas Code, which is effective April 6, 2020.
- Municipal enforcement generally requires adoption by local ordinance, subject to statutory requirements for certain municipalities and statutory enforcement responsibilities where no adoption ordinance is in effect.
- The 2024 Minnesota Commercial Energy Code is effective January 5, 2024.
- Requirements for adult changing stations are effective August 15, 2025, and requirements for window-cleaning safety features are effective November 7, 2025, according to the Department of Labor and Industry update page.
2020 Minnesota State Building Code effective date: 2020-03-31 (Minnesota Mechanical Fuel Gas Code effective 2020-04-06) · 2024 Minnesota Commercial Energy Code effective date: 2024-01-05 · Adult changing station supplement effective date: 2025-08-15 · Window-cleaning safety feature supplement effective date: 2025-11-07
“(a) The State Building Code is the standard that applies statewide for the construction, reconstruction, alteration, repair, and use of buildings and other structures of the type governed by the code.”
2025 Minnesota Statutes, section 326B.121 ↗Re-checked Sep 11, 2026
InspectionsRequired
Construction or work for which a Minnesota State Building Code permit is required.
- The work must remain accessible and exposed until approved.
- The permit applicant must cause the work to remain accessible and exposed for inspection.
- The building official identifies required inspections; the permit holder must maintain the inspection record card until final approval.
- Work may not proceed beyond each successive inspection point without building-official approval; noncomplying portions must be corrected and may not be covered or concealed until authorized.
“Construction or work for which a permit is required is subject to inspection by the building official”
1300.0210 INSPECTIONS ↗Re-checked Sep 11, 2026
Camping on your landLimited
Private or public areas accommodating five or more tents or recreational camping vehicles on a daily, nightly, weekly, or longer basis
- An annual license from the Minnesota Department of Health is required before establishing, maintaining, conducting, or operating a recreational camping area.
- The license requires application, payment of the statutory fee, and approval for operation including plan review.
- A recreational camping area excludes children's camps, industrial camps, migrant labor camps, United States Forest Service camps, state forest service camps, qualifying state wildlife-management or state-owned public-access areas, qualifying temporary holding areas adjacent to motorsports facilities, and a privately owned area used by a private club no more than once annually and no longer than seven consecutive days.
- A special event recreational camping area operates no more than two times annually and for no more than 14 consecutive days.
- The statute does not resolve local zoning or land-use requirements.
minimum accommodated tents or recreational camping vehicles: >= 5 units (Statutory exclusions apply.) · special event operating frequency: <= 2 times annually (Special event recreational camping area.) · special event duration: <= 14 consecutive days (Special event recreational camping area.) · annual license base fee for recreational camping area with 24 or fewer sites: 100 USD (Additional $8 per licensed site; special event areas are excluded from that per-site paragraph.) · annual license base fee for recreational camping area with 25 to 99 sites: 410 USD (Additional $8 per licensed site; special event areas are excluded from that per-site paragraph.) · annual license base fee for recreational camping area with 100 or more sites: 610 USD (Additional $8 per licensed site; special event areas are excluded from that per-site paragraph.)
“"Recreational camping area" means any area, whether privately or publicly owned, used on a daily, nightly, weekly, or longer basis for the accommodation of five or more tents or recreational camping vehicles free of charge or for compensation. [...] "Special event recreational camping area" means a recreational camping area which operates no more than two times annually and for no more than 14 consecutive days. [...] No person, firm or corporation shall establish, maintain, conduct or operate a manufactured home park or recreational camping area within this state without first obtaining an annual license from the state Department of Health.”
2025 Minnesota Statutes, Chapter 327 ↗Re-checked Sep 11, 2026
Manufactured homesLimited
New manufactured homes installed for occupancy statewide in Minnesota
- Inspection is required under Federal Installation Standards Programs, CFR 3285 and 3286.
- Manufactured-home alterations require documentation submitted for review to the Department of Labor and Industry or the local authority having jurisdiction before work begins.
- Local building officials and local code enforcement may apply depending on the municipality.
“All new manufactured homes installed in Minnesota for occupancy are required to be inspected according to the Federal Installation Standards Programs, Code of Federal Regulations (CFR) 3285 and 3286.”
Manufactured home information ↗Re-checked Sep 11, 2026
Who permits septicMixed
Minnesota subsurface sewage treatment systems statewide.
- MPCA establishes the statewide regulatory framework.
- Counties, cities, and townships implement and enforce the rules through local ordinances.
- Local government units may impose requirements stricter than the minimum state requirements.
- Counties, cities, and townships issue construction permits for most SSTS; MPCA permits large systems designed for flows greater than 10,000 gallons per day.
large SSTS permitting threshold: > 10000 gallons per day
“Counties, cities, and townships review designs and issue construction permits for most SSTS in Minnesota, but large sub-surface sewage treatment systems (LSTS) — designed to manage a flow of greater than 10,000 gallons a day — must be permitted by the MPCA”
SSTS design ↗Re-checked Sep 11, 2026
Septic permitRequired
Construction of most Minnesota SSTS, with construction permits issued by the applicable county, city, or township; large SSTS require MPCA permitting.
- Local authority and local ordinance requirements vary.
- Large SSTS designed for a flow greater than 10,000 gallons per day must be permitted by MPCA.
- Local government units may adopt stricter requirements.
large SSTS design flow: > 10000 gallons per day (Systems at or below this threshold are generally reviewed and permitted by counties, cities, or townships.)
“Counties, cities, and townships review designs and issue construction permits for most SSTS in Minnesota, but large sub-surface sewage treatment systems (LSTS) — designed to manage a flow of greater than 10,000 gallons a day — must be permitted by the MPCA”
SSTS design ↗Re-checked Sep 11, 2026
Off-grid sanitationLimited
Primitive dwellings using toilet-waste treatment devices in low dwelling-density areas, and privies governed by Minnesota SSTS rules.
- Septage disposal by the owner must follow local ordinances.
- If no local ordinance exists, septage must not be discharged to surface waters, drainageways, steeply sloping areas, or wet areas in a manner or volume harmful to the environment or public health or that creates a nuisance.
- Material must be buried or covered with soil.
- If site conditions do not meet the rule, solids disposal must be performed under the applicable rule by a licensed maintenance business.
- Privy solids must be removed when the privy is filled to one-half capacity.
- Abandoned pits must have sewage solids and contaminated soil removed and be filled with clean earth and slightly mounded.
privy solids removal threshold: 50 percent capacity
“For primitive dwellings using toilet waste treatment devices in low dwelling density areas, septage disposal from these devices by the owner must be in accordance with local ordinances. If no ordinance exists, the septage must not be discharged to surface waters, drainageways, steeply sloping areas, or wet areas in a manner or volume that is harmful to the environment or public health or that creates a nuisance. The material must be buried or covered with soil.”
Minnesota Administrative Rules, part 7080.2450 Maintenance ↗Re-checked Sep 11, 2026
Subdividing landRegulated (with conditions)
Subdivision regulation by Minnesota municipalities that adopt subdivision regulations under Minnesota Statutes section 462.358.
- A municipality may adopt subdivision regulations by ordinance; the statute does not establish one uniform ordinance applicable to every municipality.
- Regulations may apply only to certain classes or kinds of subdivisions and must be uniform for each class or kind.
- A municipality may extend its subdivision regulations to unincorporated territory within two miles of its limits, subject to the statutory exception for towns that have adopted subdivision regulations.
- Regulations may address lot size, location, grading, improvements, utilities, site planning, floodplains, shorelands, soils, water, vegetation, energy, air quality, and geologic and ecological features.
- Regulations may prohibit certain classes or kinds of subdivisions when consistent with the comprehensive plan and statutory purposes.
- All subdivisions creating five or more lots or parcels that are 2-1/2 acres or less in size must be platted when subject to the municipal subdivision regulations.
municipal extension distance: <= 2 miles (Unincorporated territory; not in a town which has adopted subdivision regulations.) · mandatory platting threshold: >= 5 lots or parcels (Each lot or parcel is 2-1/2 acres or less in size.) · maximum parcel size for mandatory platting: <= 2.5 acres (Applies to subdivisions creating five or more lots or parcels.)
“a municipality may by ordinance adopt subdivision regulations establishing standards, requirements, and procedures for the review and approval or disapproval of subdivisions.”
2025 Minnesota Statutes, Section 462.358: Official Controls: Subdivision Regulation; Dedication ↗Re-checked Sep 11, 2026
Driveway accessLimited
Additional ingress to or egress from a public highway for property with a right of direct private access.
- The access must facilitate efficient use of the property for a particular lawful purpose.
- The access is subject to reasonable regulation by and a permit from the road authority.
- Regulation and permitting may address interference with highway construction, maintenance, safe use, appurtenances, and public use.
“The owner or occupant of property abutting upon a public highway, having a right of direct private access thereto, may provide such other or additional means of ingress from and egress to the highway as will facilitate the efficient use of the property for a particular lawful purpose, subject to reasonable regulation by and permit from the road authority as is necessary to prevent interference with the construction, maintenance and safe use of the highway and its appurtenances and the public use thereof.”
Minnesota Statutes, section 160.18: Access to roads; approaches ↗Re-checked Sep 11, 2026
Building in a floodplainRequired
Building a house, placing fill, or installing a culvert or bridge in portions of a Minnesota floodplain.
- Construction and fill are generally permitted only where they comply with the community’s floodplain management ordinance.
- The cited examples require a floodplain permit.
- Floodway, flood fringe, mapped floodplain, local zoning, and engineering requirements may affect the result.
- Local governments administer the applicable floodplain permit in the ordinary case.
“Construction and fill is generally permitted in portions of the floodplain, provided they adhere to their community’s floodplain management ordinance. Such projects as building a house, placement of fill, or installing a culvert or bridge would all require a floodplain permit.”
Floodplain Regulations ↗Re-checked Sep 11, 2026
Permit feesVariable (with conditions)
Minnesota State Building Code permit fees administered by adopting local municipalities.
- Fees are determined and established by the local municipality.
- Fees must cover costs associated with administration and enforcement of the State Building Code.
- Fees may use a fixed-fee basis, a construction-value sliding fee schedule, or a combination.
- Fees must be commensurate with services provided.
“Permit fees are to be determined and established by the local municipality. Permit fees must be established so that they cover all costs associated with administration and enforcement the State Building Code - to run a functioning building department. Permit fees can be developed on a “fixed fee” basis and on a construction “value” type of sliding fee schedule, or a combination of both.”
Minnesota State Building Code Adoption Guide ↗Re-checked Sep 11, 2026
Permit processPublished (with conditions)
Building-permit administration under the Minnesota State Building Code where the code has been adopted or otherwise applies.
- A certified building official or certified limited building official administers and enforces the code.
- The building official reviews and approves building-code requirements and issues building permits.
- Construction-related applications complying with the building code must receive a building permit.
- Other local zoning or ordinance requirements may separately affect approval.
- Some agricultural buildings on qualifying agricultural land are exempt from the building-permit requirement and fee.
“However, it is only the building official that can review and approve building code requirements and subsequently sign-off on and/or issue building permits. If such an application is construction related only and the work complies with the building code, the building official must issue a building permit. Other building permits may be denied (by the local board or commission) if the proposal does not comply with other local zoning codes or ordinances.”
Minnesota State Building Code Adoption Guide ↗Re-checked Sep 11, 2026
county zoning authorityLimited
County planning and zoning authority over unincorporated areas of Minnesota.
- The authority applies to a county having less than 300,000 population according to the 1950 federal census.
- The statute authorizes county planning and zoning activities generally within the qualifying counties; it does not identify a separate unincorporated-area limitation in this section.
- Except as otherwise provided, a county regardless of population must not enact, amend, or enforce an ordinance eliminating or terminating a lawful use by amortization.
- The amortization prohibition does not apply to adults-only bookstores, adults-only theaters, or similar adults-only businesses as defined by ordinance.
- The amortization subdivision does not prohibit nuisance-prevention or nuisance-abatement enforcement or elimination of a use determined to be a public nuisance without payment of compensation.
population threshold: < 300000 persons (According to the 1950 federal census)
“having less than 300,000 population according to the 1950 federal census is authorized to carry on county planning and zoning activities.”
Minnesota Statutes 2025, section 394.21: Authority to Carry on County Planning and Zoning ↗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.

Certificate of occupancy — Certificates of occupancy for buildings in Washington County.
Minimum dwelling size — Minimum dwelling size in county-regulated unincorporated areas.
Minimum lot size — Minimum lot size in county-regulated unincorporated areas.
Lot coverage — Lot coverage in county-regulated unincorporated areas.
Living in an RV — RV occupancy on private land in Washington County.

2 more unanswered

Tiny homes
Short-term rentals

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.

Water rights & wells in Washington County

Whether a new home can legally get its own water here — the sub-state groundwater regime, from Minnesota’s water agency.

Actively managed

This basin is under active state management — new water use is scrutinized, though a domestic well is usually still allowed.

Household wellExempt up to a limit

Regulated-riparian: appropriation permits apply above 10,000 gpd / 1 million gal/yr. Domestic use under those thresholds is exempt; a well-construction notification to the MN Dept. of Health is still required. Household use is far below the cap.

Limit: <=10,000 gpd and <=1,000,000 gal/yr serving <=25 persons

Minnesota DNR — Do I need a water permit? ↗

North and East Metro Groundwater Management Arealocalized of county
DNR-designated GWMA (all of Ramsey and Washington; portions of Anoka and Hennepin) managing Prairie du Chien-Jordan aquifer appropriations amid lake-level declines (e.g. White Bear Lake). New/expanded appropriation permits get heightened review; domestic wells remain exempt.
Minnesota DNR — North and East Metro GWMA ↗

Regulated-riparian state (large uses permitted). Groundwater rules change and basin boundaries follow the aquifer, not the county line — confirm current well and appropriation rules with the Minnesota state water agency before you buy or drill.Groundwater governance as of Jul 2026, cited to each administering agency.

Living off-grid in Washington County, Minnesota

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

Washington County scores 42/100 on the Bolthole Index, a marginal county profile. Its strengths: mixed durability signals and a stronger property-autonomy legal backdrop. Watch-outs: about 573,159 people within a 30-minute drive.

Do you need a building permit in Washington County, Minnesota?

Washington County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Washington County Department of Public Health and Environment. 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 Washington County, Minnesota?

Land in Washington County runs about $11,320 per acre, based on the latest county data.

What is the water situation in Washington County?

Washington County gets about 33" of rain a year, with severe drought in roughly 7.3% of years. On water rights, Washington County lies in the North and East Metro Groundwater Management Area — DNR-designated GWMA (all of Ramsey and Washington; portions of Anoka and Hennepin) managing Prairie du Chien-Jordan aquifer appropriations amid lake-level declines (e.g. White Bear Lake). New/expanded appropriation permits get heightened review; domestic wells remain exempt..

How remote is Washington County?

A representative private-land location has about 573,159 people within a 30-minute drive and 4,972,795 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 land rules in Washington County, Minnesota

At a glance

Who to call

Do you need a building permit in Washington County, Minnesota?

Who handles zoning, septic and driveway permits in Washington County, and how do you reach them?

Does Washington County have zoning, and what does that mean for RVs, tiny homes and setbacks?

How do septic permits work in Washington County?

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

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

What to check before you buy land in Washington County

Watch-outs

Sources

Washington County in Minnesota

How Washington County scores

Find land. Bring the promising ones back.

Parcel due diligence

Answers from the rulebook for Washington County

Washington County rules

Minnesota rules that apply here

Still unanswered

Water rights & wells in Washington County

Living off-grid in Washington County, Minnesota

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

Do you need a building permit in Washington County, Minnesota?

How much does land cost in Washington County, Minnesota?

What is the water situation in Washington County?

How remote is Washington County?

How Washington compares in Minnesota