Building permits, zoning and rural land rules across Maryland

At a glance

Residential building permits

0 counties with none; 2 limited; 22 required²⁷⁸

Countywide zoning

1 county without countywide zoning; 23 with county zoning³⁹

No building permit and no zoning

0 counties¹⁰

Septic permits

Required from the applicable approving authority; MDE oversees delegated programs¹¹⁴

RV living

15 county answers: 0 allowed, 2 temporary-only, 9 limited, 4 prohibited; 9 unanswered⁵

Tiny homes

8 county answers: 2 allowed with conditions, 6 limited; 16 unanswered⁶

Owner-builder

Owner-performed home improvements have a contractor-license-number exception, not a blanket building-permit exemption¹²

Private wells

Well construction permit required; water-use exemptions are separate¹³¹⁴

Who to call

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Which Maryland counties don't require a building permit?

Maryland has 0 counties listed without a residential building permit requirement, 22 with a requirement and 2 with requirements classified as limited.²⁸⁷ The county comparisons concern unincorporated land; municipal building enforcement can differ under Maryland's local-jurisdiction framework.¹

Wicomico County and Charles County are the limited entries; that classification does not establish that a new home is exempt.⁷ Maryland's minimum enforcement activities include plan review, building permits, inspections and appropriate use and occupancy certificates.¹

The owner-builder guide needs a careful distinction: Maryland's exception concerns the contractor license number on a permit for owner-performed home improvements, not permission to build a new home without a building permit.¹² Ask the parcel's building office which project exemptions and fees apply.¹

Which Maryland counties have no countywide zoning?

Garrett County is Maryland's only listed county without countywide zoning, and Garrett County still requires residential building permits.³ Maryland has 23 entries with county zoning and 0 with neither a residential building permit requirement nor countywide zoning.⁹¹⁰ Start with the Maryland no-zoning guide for that countywide distinction.³

Maryland places planning and zoning controls with local government, and the Department of Planning's generalized zoning map is not a substitute for a parcel's county or municipal ordinance.¹⁵¹⁶ We could not confirm statewide numeric minimum lot sizes, setbacks or minimum dwelling sizes; ask the parcel's planning office for the applicable district standards. Countywide zoning status alone does not answer those questions.¹⁶

Who issues septic permits in Maryland?

Maryland Department of the Environment's On-Site Systems Division guides delegated septic programs, while county health departments and other local approving authorities implement them.⁴ County offices are listed as septic authorities for 20 Maryland entries, making local approval the dominant pattern.¹⁷ MDE's On-Site Systems Division can answer program questions at 410-537-3778.¹⁸

A Maryland septic system cannot be constructed without an approving-authority permit, and alterations or increased wastewater flow also require permission.¹¹ Septic permits must conform to the county water and sewerage plan and cannot be issued without a safe, adequate water supply.¹¹ No part of a septic system may be covered or used before inspection and approval.¹⁹

Before buying, ask the local approving authority about site evaluation, the septic permit fee and approval of any existing system serving the proposed home. Construction permits last no more than 2 years, with renewal at the approving authority's discretion.¹¹

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

Maryland has county-specific RV answers for 15 jurisdictions: 0 classified as allowed, 2 temporary-only, 9 limited and 4 prohibited; the remaining 9 are unanswered.⁵ These categories do not establish permission to live in an RV while building a house.⁵ We could not confirm statewide authorization for residential RV occupancy on private land; ask the parcel's zoning office about the intended stay and use.

Tiny-home answers cover 8 jurisdictions: 2 allowed with conditions and 6 limited, leaving 16 unanswered.⁶ Montgomery County identifies a tiny home as a possible accessory dwelling unit on qualifying property; Baltimore city allows qualifying tiny houses through its residential-code provisions.⁶ See the Maryland tiny-home guide for those distinctions.⁶

Maryland's accessory-dwelling framework concerns land with an existing single-family detached primary dwelling and retains building-code and public-facility standards; it does not establish that a tiny home can be the first dwelling on vacant land.²⁰

Where are the best Maryland counties for a bolthole?

Garrett County leads the Bolthole Index at 80 out of 100, followed by Dorchester County and Worcester County at 70, Wicomico County at 68 and Somerset County at 66.²¹ Allegany County scores 65, Washington County 61 and Talbot County 59.²¹

All those counties have county-level septic authorities; Garrett lacks countywide zoning, the others have county zoning, and all require residential building permits except Wicomico's limited classification.²¹

The median county farmland value is $9,467 per acre; Garrett's figure is $5,541 and Allegany's is $6,375.²² Those figures describe county farmland values, not individual residential parcel prices.²² Maryland's median county effective property-tax rate is 0.9%, and the median county property-tax bill is $3,314 annually.²³ Use the county pages to narrow the search, then ask the approving authority to assess the proposed home and wastewater system together.¹¹

What water, well and driveway approvals does Maryland require?

Every well constructed in Maryland requires a well construction permit.¹³ Maryland's domestic or agricultural water-use exemption below 10,000 gallons per day concerns appropriation permits, so that exemption does not remove the well construction permit requirement.¹⁴¹³ MDE's Wastewater Permits Program answers well construction questions at 410-537-3599.²⁴

A Maryland property already connected to community sewerage generally cannot install septic without departmental authorization, and an approving authority may require connection when community sewerage is adequate and economically available.²⁵ Ask about the county water and sewerage plan before treating a tract as suitable for independent utilities.¹¹

Construction or modification of residential driveways within State right-of-way requires coordination with the applicable MDOT State Highway Administration district office for a driveway permit.²⁶ MDOT SHA publishes district contacts on its access-management page.²⁷ Development in mapped floodplains requires local floodplain approval, and wetland or floodplain construction can also require MDE authorization.²⁸

Watch-outs

• Municipal building enforcement and zoning can differ from county comparisons; ask the office serving the parcel's actual jurisdiction.¹¹⁶
• The owner-performed home-improvement exception does not waive building permits for new-home construction.¹²
• Garrett County's lack of countywide zoning does not remove Maryland septic or floodplain approvals.³¹¹²⁸
• We could not confirm statewide permission for private-land RV living or tiny-home occupancy; ask the parcel's zoning and building offices before moving a unit onto the land.⁵⁶

Sources

1. Maryland: Maryland Public Safety Article § 12-505, quoted and re-checked
2. Bolthole Index county rulebook, 24 Maryland counties, as of October 10, 2026: Maryland counties that do not require a residential building permit in unincorporated areas
3. Bolthole Index county rulebook, 24 Maryland counties, as of October 10, 2026: Maryland counties with no county-wide zoning
4. Maryland: On-Site Systems Division, quoted and re-checked
5. Bolthole Index county rulebook, 24 Maryland counties, as of October 10, 2026: Maryland counties' answers on living in an RV on your own land
6. Bolthole Index county rulebook, 24 Maryland counties, as of October 10, 2026: Maryland counties' answers on living in a tiny home on your own land
7. Bolthole Index county rulebook, 24 Maryland counties, as of October 10, 2026: Maryland counties that require a residential building permit only in some cases (for example floodplain or certain structures)
8. Bolthole Index county rulebook, 24 Maryland counties, as of October 10, 2026: Maryland counties that require a residential building permit in unincorporated areas
9. Bolthole Index county rulebook, 24 Maryland counties, as of October 10, 2026: Maryland counties with county zoning
10. Bolthole Index county rulebook, 24 Maryland counties, as of October 10, 2026: Maryland counties with neither a residential building permit nor county-wide zoning
11. Maryland: COMAR 26.04.02.03 On-Site Sewage Disposal Permits, quoted and re-checked
12. Maryland: Maryland Business Regulation Article § 8-504, quoted and re-checked
13. Maryland: Well Construction Permit Applications and Forms, quoted and re-checked
14. Maryland water rights and groundwater management: National Agricultural Law Center and Bolthole Index groundwater review
15. Maryland: Maryland Code, Local Government Article, quoted and re-checked
16. Maryland: Geospatial Applications and Modeling (GAM), quoted and re-checked
17. Bolthole Index county rulebook, 24 Maryland counties, as of October 10, 2026: Who issues septic permits across Maryland's counties: a state agency, a multi-county health district, or the county
18. Maryland Department of the Environment — On-Site Systems Division (mde.maryland.gov)
19. Maryland: COMAR 26.04.02.02 General Provisions, quoted and re-checked
20. Maryland: Maryland Land Use Article §4-502, quoted and re-checked
21. Bolthole Index county rulebook, 24 Maryland counties, as of October 10, 2026: The 8 highest-scoring Maryland counties on the Bolthole Index (off-grid and homestead land score out of 100), with each one's building-permit, zoning and septic answers
22. Bolthole Index county rulebook, 24 Maryland counties, as of October 10, 2026: Median farmland value per acre across Maryland's counties (USDA census, the middle county's value; USD/acre), with the five least expensive counties
23. Bolthole Index county rulebook, 24 Maryland counties, as of October 10, 2026: Median of Maryland's county effective property tax rates and median county property tax bills
24. Maryland Department of the Environment — Wastewater Permits Program (mde.maryland.gov)
25. Maryland: COMAR 26.04.02 Sewage Disposal and Certain Water Systems for Homes and Other Establishments in the Counties of Maryland Where a Public Sewage System Is Not Available, quoted and re-checked
26. Maryland: Access Management/Permits - MDOT SHA, quoted and re-checked
27. MDOT State Highway Administration — Access Management (roads.maryland.gov)
28. Maryland: Floodplain Permitting in Maryland, quoted and re-checked

Written October 10, 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.