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The Thomas Point Shoal Lighthouse standing in the Chesapeake Bay off Annapolis, Maryland.

Tiny Homes in Maryland: Laws, Rules and Communities

Updated November 4, 2026. Some laws may have changed since then. Confirm with your county or city before you buy land or a home.

The short answer

Yes, you can live in a tiny home full time in Maryland, on a foundation and where local zoning allows it. Maryland's statewide building code includes the tiny house appendix, Appendix AQ, for homes of 400 square feet or less, though a county or city can amend it. A tiny home on wheels has no category of its own in state law, so local zoning decides where you can live in one. A state law in effect since October 1, 2025, required local governments to adopt laws allowing accessory dwelling units by October 1, 2026. Maryland has the 7th highest cost of living of the 50 states, an income tax of 2.00 to 6.50 percent (plus a local income tax of up to 3.3 percent), an effective property tax rate of 0.92 percent (21st highest), and homeowners insurance averaging $2,375 a year. We do not have a Maryland tour to list yet.

On this page. Quick facts, the rules in plain words, where to start, living in Maryland, communities and common questions.

In Maryland, the state sets the building code and your county or city enforces it and decides zoning. A tiny home on a permanent foundation, anchored to a base built into the ground like a slab or piers, is a house under the state code, and the code has its own relaxed rules for very small houses. A tiny home on wheels, built on a trailer so it can be towed, is harder. We found no state law that sets a category for one, so where you can live in it depends on your county or city.

This guide covers the state code and its tiny house appendix, homes on wheels, manufactured and modular homes, the new ADU law, septic near the Chesapeake Bay, and where to start.

Quick facts

  • On a foundation: a house under the Maryland Building Performance Standards, based on the 2021 International Residential Code. New homes need fire sprinklers under the state code.
  • Tiny house rules: Appendix AQ, adopted statewide for homes of 400 square feet or less, not counting lofts. A county or city can amend the state code.
  • Next code update: a proposal to move to the 2024 codes was withdrawn on October 16, 2026, so the 2021 codes stay in force for now.
  • On wheels (built on a trailer): no category of its own in state law. Local zoning decides.
  • ADUs (a second, smaller home on the same lot as a house): local governments had to adopt an ADU law by October 1, 2026. Under the state definition, an ADU can be up to 75 percent of the size of the main house.
  • Manufactured and modular homes: since January 1, 2025, a county or city may not ban a new modular home, or a new manufactured home converted to real property, in a zone that allows single-family homes.
  • Septic: permitted through your county health department. In the Critical Area, land within 1,000 feet of tidal waters or tidal wetlands, new and replacement septic systems need nitrogen-reducing technology.

Can you live in a tiny home full time in Maryland?

Yes, on a foundation where local zoning allows it. On wheels, it depends on your county or city.

  • On a foundation, a tiny home is a house. It has to meet the state building code, including Appendix AQ if your county or city uses it as written, and it needs sewer or a permitted septic system.
  • On wheels, we found no state law that allows or bans living full time in one. Local zoning decides.
  • Maryland sets no statewide minimum house size that we found. Ask your county or city whether it does.

The rules in plain words

Building code

Maryland's building code is the Maryland Building Performance Standards. They adopt the 2021 International Building Code, the 2021 International Residential Code and the 2021 International Energy Conservation Code, with Maryland changes. The current version of that rule took effect May 29, 2023. Counties and cities enforce the code, issue permits and inspect, and they have 12 months to put a state code change into effect. Plumbing, electrical and mechanical work fall under separate state and local codes.

The state code keeps the national code's rule that new one- and two-family homes have automatic fire sprinklers, and state law says a county or city may not weaken that rule. The one exception in the law lets a county or city relax it for a property not connected to an electric utility. The state planning department says the rule covers newly built ADUs too, and notes an Attorney General opinion that no state law requires sprinklers in manufactured homes, though local rules may. Plan for sprinklers in a new tiny home on a foundation, and if the home will be off the grid, ask your county whether it uses that exception.

The state proposed moving to the 2024 codes in June 2026. It withdrew the whole proposal, with a notice published October 16, 2026, while it works through comments on the energy rules. Ask your building department which edition it enforces when you apply.

The tiny house appendix (Appendix AQ)

The national residential code has an appendix with rules for tiny houses. In the 2021 code it is called Appendix AQ, and Maryland's code says Appendix AQ is "adopted as part of the IRC." It covers a dwelling of 400 square feet or less, not counting lofts.

Under Appendix AQ:

  • Ceilings in living spaces and hallways must be at least 6 feet 8 inches. Bathrooms, toilet rooms and kitchens can be as low as 6 feet 4 inches.
  • A loft must have at least 35 square feet of floor and be at least 5 feet wide in every direction. Parts of a loft with less than 3 feet of headroom do not count toward that area, or less than 16 inches under a gable roof with a slope of at least 6 in 12.
  • A loft can be reached by stairs, a ladder, an alternating tread device or the other options the appendix lists.
  • The home still needs emergency escape openings like any other house.

Whether Appendix AQ applies in your county is not settled statewide, and the reason is in the same rule. The state code adopts the appendix. The same rule lets each county or city change the code for local conditions, and says the local change wins where the two conflict. The rule lists what local changes may not weaken, the energy code, sprinklers in homes and townhouses, and wind design, and the tiny house appendix is not on that list. The sources lean toward Appendix AQ applying unless your county or city changed it, but we did not check every local code. Ask your building department whether it uses Appendix AQ as written before you design around its loft and ceiling rules.

If you would rather skip the loft, see tiny home layouts without a loft.

Tiny homes on wheels

We found no Maryland law that gives a tiny home on wheels a category of its own, so how one is treated is not settled. Three things point different ways.

  • The MVA says a trailer may need to be titled and registered "depending on its weight and how it's used." Its page does not cover homemade trailers.
  • Appendix AQ defines a tiny house as a dwelling, and the parts we read say nothing about wheels or a chassis. Whether a building official will apply it to a home on a trailer is a local call.
  • The 2024 manufactured and modular home law below does not cover homes on wheels or on temporary foundations, and Anne Arundel County's cottage home law requires a permanent foundation.

What it means for you. The label can decide where zoning lets you live in the home and how it is titled, so get your county's answer in writing before you buy land or a home, and ask the MVA how it will be titled. Where you can live in one is a local zoning question.

Modular and manufactured homes

A 2024 law, the Housing Expansion and Affordability Act (HB 538), took effect January 1, 2025. It says a county or city "may not prohibit the placement of a new manufactured home or modular dwelling in a zone that allows single-family residential uses" when the home is either a modular home set on an approved foundation, or a manufactured home that is or will be converted to real property. The law also covers new homes on certain large former military sites.

The state housing department explains what that conversion takes. A permanent foundation, the same owner for the home and the land, and a recorded affidavit. Local building, zoning and other rules still apply, there is no exemption for historic districts, and the law does not require allowing mobile homes on wheels or on temporary foundations.

The ADU law

Maryland's ADU law, HB 1466 of 2025, took effect October 1, 2025. It required each county and city legislative body to adopt a local law allowing accessory dwelling units by October 1, 2026, on land with a single-family detached house.

  • An ADU is a second home on the same lot, attached as an addition or in a separate building, and "not greater than 75% of the size of" the main house. The state planning department reads that to mean a local law cannot cap ADUs below 75 percent of the main house.
  • ADUs do not count toward density limits or local growth limits for the lot.
  • Side and rear setbacks for an ADU can be no larger than the setbacks the county or city already sets for accessory structures.
  • A county or city can require extra off-street parking only after a parking study, and it must offer a way to waive it.
  • Deeds, HOA rules and other private restrictions cannot put an "unreasonable limitation" on building or renting an ADU, as long as the owner has the exclusive right to use the property and follows the law. A limit on short-term rentals does not count as unreasonable, and the rule does not apply to historic properties listed in, or found eligible for, the Maryland Register of Historic Properties.
  • The same law lets an HOA's governing body treat an ADU as a separate lot for HOA votes and for levying assessments, so an HOA can charge an ADU its own assessment.

What the state law does not settle. It does not say whether the owner must live on the property, so counties decide. Howard County, for example, passed new rules in February 2026, in effect since April 8, 2026, that allow attached and detached ADUs and keep its owner occupancy rule, so the owner must live in the main house or the ADU. The state law also does not say whether a tiny home on wheels can be an ADU, so ask your county. Check your county's current ADU law before you plan, since counties such as Howard changed their ADU rules in 2026 to line up with the state law. If you want a small home in a backyard, see how one owner did it.

Other recent laws

  • The Maryland Housing Certainty Act (HB 548 of 2026) took effect October 1, 2026. It says the decision on a housing project application is governed only by the laws and rules in effect when a substantially complete application was submitted, with some exceptions, such as health and safety rules needed to address immediate threats.
  • Anne Arundel County passed a cottage home law (Bill 92-25) in February 2026. Cottage homes can be up to 800 square feet, not counting lofts, on a permanent foundation, in developments of at least 10 homes, with income limits for buyers. Each development must connect to public water and public sewer.

Septic and wells

Your county health department permits septic systems and wells, under programs the Maryland Department of the Environment hands to the counties. In Garrett County, for example, the permit starts with a percolation test, and you mark out a 100 by 100 foot disposal area and install the system in the upper third, with the rest kept for future repairs.

Where the land is matters as much as the soil.

  • Within the Chesapeake and Atlantic Coastal Bays Critical Area, mapped land within 1,000 feet of tidal waters or tidal wetlands, a new or replacement septic system must use a nitrogen-reducing system, called Best Available Technology or BAT. State rules require the owner to keep it maintained for the life of the system, through a management entity, an operating permit or a certified service provider, and under the service provider option it is inspected and serviced at least once a year.
  • Outside the Critical Area, state rules have allowed conventional septic systems for new homes since November 24, 2016. Your county can still require a nitrogen-reducing system to protect health or water.
  • The state lists waterless toilet systems as one class of nitrogen-reducing technology, with its own application process. If you plan to use a composting toilet, ask your health department how that changes your septic requirements, since the home will still produce sink and shower water.

Where to start

  1. Not sure which office covers your land? USA.gov's local government finder points to a directory of Maryland's counties and cities, with their websites and contacts.
  2. Call the county planning and zoning office, or the city if the land is inside city limits. Ask whether tiny homes and ADUs are allowed, whether a tiny home on wheels can be lived in there, and get the answer in writing.
  3. Ask the building department which code edition it enforces, whether it uses Appendix AQ as written, and what it requires for fire sprinklers.
  4. If the land is not on public sewer, ask the county health department about a percolation test and septic permit before you buy.
  5. Check whether the land is in the Critical Area, within 1,000 feet of tidal waters or tidal wetlands. The Critical Area Commission has a lookup on its website.
  6. For an ADU, ask for your county's current ADU law and whether the owner must live on the property.
  7. For a tiny home on wheels, ask the MVA how it will be titled.
  8. Before buying land, check deed restrictions and HOA rules too.

Living in Maryland

How Maryland compares with the other 49 states on the things people weigh before a move. Figures as of November 2026.

  • Happiness score (WalletHub 2026). 62.01 out of 100, 5th happiest
  • Cost of living (MERIC, Q2 2026; U.S. average is 100). 118.8, 7th highest
  • State income tax. 2.00 to 6.50 percent, plus local income tax of up to 3.3 percent
  • Property tax, effective rate on owner-occupied homes (Tax Foundation, 2024 data). 0.92 percent, 21st highest
  • Homeowners insurance, average a year with $400,000 in dwelling coverage (NerdWallet 2026; U.S. average $2,490). $2,375
  • Health care (U.S. News Best States). 5th
  • Education (U.S. News Best States). 24th
  • Average temperature, 1991 to 2020. 55.4 degrees F
  • Average precipitation, 1991 to 2020. 45.23 inches a year
  • Sunshine in Baltimore. 57 percent of daylight hours, 105 clear days a year

Maryland ranks 5th happiest in WalletHub's 2026 study and 5th in health care in U.S. News. Its cost of living is above the national average, 7th highest of the 50 states. The state income tax runs from 2.00 to 6.50 percent, and local income taxes can add up to 3.3 percent more. Homeowners insurance averages $2,375 a year with $400,000 in dwelling coverage, compared with a U.S. average of $2,490.

Rankings mix many factors, and statewide averages hide big differences between regions. Western Maryland's mountains, the Baltimore and Washington suburbs, southern Maryland and the Eastern Shore differ in weather, land prices and local rules, so look at the area where you plan to live.

Tiny home communities in Maryland

As of October 2026 we could not confirm a tiny home community in Maryland, or an RV park that takes tiny homes for long stays, on its own website. Some directory listings for the state turned out to be vacation cabins or had no operator we could find. We will add communities here when we can confirm them. Contact any community directly before you plan around it.

Tours we have filmed in Maryland

We do not have a Maryland tour to list here yet. When we do, it will be listed here. Our tours from other states are at Tiny Home Tours by State.

Get new tours and guides

Every other Friday we send real tours, results from our audience polls, and parking and legal lessons from people living tiny. Join the Tiny Home Tours newsletter.

Frequently asked questions

Is it legal to live in a tiny house in Maryland?

Yes, on a foundation, if it meets the state building code, including fire sprinklers in a new home, and local zoning, with sewer or a permitted septic system. For a tiny home on wheels, local zoning decides.

Does Maryland use Appendix Q for tiny houses?

Yes. Maryland's code adopts the 2021 version, called Appendix AQ, statewide for homes of 400 square feet or less, not counting lofts. A county or city can amend the state code, so ask your building department whether it uses Appendix AQ as written.

Can I park a tiny home on wheels on my own land in Maryland?

It depends on your county or city. We found no state law that allows or bans living full time in a tiny home on wheels, so local zoning decides. Get the answer in writing, and ask the MVA how the home will be titled.

Can I build a backyard tiny house in Maryland?

It depends on your county's or city's ADU law. State law required local governments to adopt one by October 1, 2026, for lots with a single-family detached house. An ADU can be up to 75 percent of the size of the main house, and counties set rules like owner occupancy. Ask your county for its current ADU law.

Do I need a septic permit for a tiny home in Maryland?

Yes, if the land is not on sewer. Your county health department issues the permit. In the Critical Area, land within 1,000 feet of tidal waters or tidal wetlands, new and replacement septic systems need a nitrogen-reducing system.

Sources

This page explains the rules in general terms and is not legal advice. Local rules vary. Confirm with your county or city before you buy land or a home.

Hero photo: Thomas Point Shoal Lighthouse, by Joey Graziano on Unsplash.

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