Remodeling Permits in Prince George's County, Maryland

Prince George's County issues building, electrical and mechanical permits through DPIE, but plumbing and gas permits come from WSSC, and incorporated towns including Bowie, College Park, Greenbelt and Laurel add a step of their own. Finishing a basement needs a building permit. Remodel Now remodels basements across Prince George's County.

Three agencies issue the permits for one basement

Call the county about a basement and you will get a longer answer than you expected, because Prince George's County splits the work three ways.

The Department of Permitting, Inspections and Enforcement, known as DPIE, issues the building permit and the trade permits for electrical and mechanical work. Its residential alteration page covers interior renovation of an existing house, which is where a basement finish lands.

Plumbing is not DPIE's. The department says so on its own residential plumbing page: DPIE does not review plumbing plans and does not issue any plumbing permits. All plumbing permits are issued by the Washington Suburban Sanitary Commission, which keeps a satellite office inside DPIE and does the plumbing inspections itself. That single sentence undoes most of what homeowners assume about a basement bathroom.

Then there is the municipality. Bowie, College Park, Greenbelt, Hyattsville, Laurel and Riverdale Park are incorporated towns with their own governments. Lanham and Adelphi are not incorporated, so no town permit office exists in either place. DPIE publishes a matrix precisely because permit requirements vary depending on the municipality, and that matrix hands each category of work to the county, the town, or both.

So a finished basement in Bowie can involve a DPIE building permit, a separate City of Bowie permit, a WSSC plumbing permit if a bathroom goes in, and a DPIE electrical permit that neither you nor your general contractor is allowed to apply for. None of that is unusual here. It is just rarely explained before the contract gets signed.

What DPIE wants on a basement finishing application

The county's own answer to the basement question is short. Its FAQ on finishing a basement lists two things: complete the application form, and provide a copy of the basement floor plans. The page then points to a county document called the Finished Basement General Code Requirement for the detail behind the drawings.

Short list, real drawings. Plans have to be drawn to scale and be of sufficient quality to explain the proposed construction clearly and completely, which is the county's minimum standard for every residential project. A floor plan that shows new partition locations, the stair, the mechanical room, door swings, ceiling heights, and the location and size of any egress opening is the version that gets through review. A sketch on graph paper usually comes back.

Applications go through the county's Momentum portal. For owner occupied single family homes and townhouses, DPIE also runs a Virtual Permit Center with a walk-through review, and basement finishing sits on the list of projects that qualify, with up to three additional items allowed alongside it. Structural review is the only review that applies, since nothing outside the house is changing.

Two exclusions matter before anyone counts on that path. Properties served by a private well or septic system cannot use the virtual process at all. Properties in a historic district, the Chesapeake Bay Critical Area or a fine arts jurisdiction have to obtain that approval before DPIE will issue a permit, not after.

Whether it is a bedroom changes the whole job

The most expensive decision in a basement gets made on the floor plan, and most homeowners make it without realizing what it costs.

Maryland builds to the International Residential Code, and the county's published code list confirms it now works from the 2021 edition along with Subtitle 4, the county's own building code. Section R310.7 of that code is the one that matters here. New sleeping rooms created in an existing basement have to be provided with emergency escape and rescue openings. Other than new sleeping rooms, where existing basements undergo alterations or repairs, an emergency escape and rescue opening is not required.

Read that twice. A rec room, a home office, a gym and a bathroom in an existing basement do not trigger an egress window. Call one of those rooms a bedroom and you have committed to cutting an opening through a foundation wall.

When the opening is required, the numbers are specific. The net clear opening has to be at least 5.7 square feet, with a minimum clear height of 24 inches and a minimum clear width of 20 inches, and the bottom of that opening can sit no more than 44 inches above the finished floor. Below grade it needs an area well with a horizontal area of at least 9 square feet and a projection and width of at least 36 inches. If the well is deeper than 44 inches, it needs a permanently affixed ladder or steps. Area wells have to drain into the foundation drainage system unless the soil qualifies for the exception.

Ceiling height sets the other boundary. Habitable space needs 7 feet. Bathrooms, toilet rooms and laundry rooms need 6 feet 8 inches. Parts of a basement that contain neither habitable space nor a hallway need 6 feet 8 inches as well, and at beams, girders, ducts and other obstructions the clearance can come down to 6 feet 4 inches. In older houses around Riverdale Park and Hyattsville, the duct trunk running the length of the joist bays is often the thing that decides where the finished rooms can go.

DPIE will not give you a plumbing permit

If the basement gets a bathroom, a wet bar or a laundry sink, a second agency enters the job.

WSSC's own guidance for homeowners states the rule: in Montgomery and Prince George's counties, most plumbing projects must be done by a WSSC Water licensed plumber or gasfitter. The examples it gives include interior re-piping and all gas work, such as furnace, gas water heater and gas appliance replacements. Homeowners are allowed a narrow band of their own work under the Plumbing and Fuel Gas Code, and gas appliance installation is not in it.

DPIE reinforces the same point from its side. Installation of plumbing or natural gas piping requires an application by a Registered Master Plumber or Gasfitter licensed by WSSC. Installation of natural gas piping and appliances by anyone other than a registered master gasfitter is, in the county's words, strictly prohibited.

Ask for the plumber's WSSC license number and verify it. WSSC's licensing office takes that call at 301-206-8588. For work done under a short form permit, WSSC schedules inspections at 301-206-4004, and the homeowner or a representative has to escort the inspector for interior and backyard inspections.

The practical consequence for a basement bathroom is that two permit tracks run in parallel. DPIE holds the building permit for the walls and the electrical permit for the circuits. WSSC holds the plumbing permit and sends its own inspector. Neither agency tells the other that your rough is ready. Somebody on the job has to schedule both, and in the right order, because nothing gets covered until both have passed.

Who is allowed to pull the electrical permit

Not you, and not your general contractor.

DPIE's alteration page is explicit: electrical work for additions or alterations of existing dwellings requires an application for an electrical permit by a Master Electrician licensed by the State of Maryland. The county's homeowner permit chart carries the same footnote on every electrical line, including replacing wiring, relocating switches, outlets, lighting fixtures and sub-panels, and installing smoke detectors connected to house wiring. An electrical or mechanical contractor's license is required to obtain those trade permits.

The county enforces the 2020 National Electrical Code together with Subtitle 9, the Prince George's County Electrical Code. Master electricians apply through DPIE's online electrical process after registering with the department, which is a separate step from holding the state license. Ask whether the electrician on your job has already registered, because an unregistered one cannot file on Monday morning.

A permitted alteration also drags two alarm requirements into the house that have nothing to do with the basement. Where alterations, repairs or additions requiring a permit occur, the dwelling unit has to be equipped with smoke alarms located as required for new dwellings, and with carbon monoxide alarms on the same terms. That means a smoke alarm in each sleeping room, outside each separate sleeping area, and on each additional story including basements. Carbon monoxide alarms follow the same trigger the code sets for new dwellings, which is a fuel fired appliance in the unit or an attached garage with an opening into it, and they go outside each separate sleeping area. The code's exceptions for exterior work and for plumbing work do not cover a basement finish.

One small rule catches almost every finished basement: enclosed space under stairs that is accessed by a door or access panel has to be protected on the enclosed side with half inch gypsum board on the walls, the under stair surface and any soffits. That storage closet under the stairs gets drywalled on its inside face, and an inspector looks at it.

Use and occupancy permits are not what homeowners think

Homeowners reading through the county's permit pages run into the use and occupancy page early, and it tends to confuse them. It should not.

In Prince George's County a use and occupancy permit is a business instrument. DPIE describes it as a permit issued to state officially that the business identified meets local zoning and safety requirements and health codes and may legally operate. A new one is required when a change of tenant, occupant, use or ownership occurs and no construction is involved. The streamlined administrative version exists for a tenant moving into an existing space without changing the use of it.

A homeowner finishing a basement in their own house is not changing the use of the building and does not apply for a use and occupancy permit. What closes out a residential job is the final inspection on the building permit, plus the finals on the electrical and plumbing permits, not a separate occupancy certificate.

Two situations do connect the ideas. If the finished basement is going to be rented, occupancy and rental rules enter, and several towns in the county run those programs themselves, separately from the construction permit. And if the plan is to run a business out of the finished space, that genuinely is a use and occupancy permit from DPIE, a different application from the building permit. A guest suite for your own family is neither.

Which of these towns adds its own step

Routing every homeowner in the county straight to DPIE is where this goes wrong. DPIE's own municipal responsibility matrix assigns residential permits differently depending on which line of the map the house sits on. That matrix carries a 2014 date, so one phone call to the town is still worth making before anyone files.

  • Bowie. Building permit: DPIE. Municipal permit on top: Yes. The city requires permits for anything the county permits, and names basement remodeling on its list. Plumbing and gas permit: WSSC.
  • College Park. Building permit: DPIE. Municipal permit on top: Yes. The county's matrix assigns residential permits to the municipality and the county. Plumbing and gas permit: WSSC.
  • Greenbelt. Building permit: DPIE. Municipal permit on top: Yes. Projects needing a county building permit must also be permitted by the city. Plumbing and gas permit: WSSC.
  • Hyattsville. Building permit: DPIE. Municipal permit on top: No. The matrix assigns residential permits to the county. Plumbing and gas permit: WSSC.
  • Riverdale Park. Building permit: DPIE. Municipal permit on top: Yes. The matrix assigns residential permits in Riverdale Park to the municipality and the county. Plumbing and gas permit: WSSC.
  • Laurel. Building permit: City of Laurel. Municipal permit on top: Not on top. The city runs its own codes, portal and reviews inside its boundaries instead of the county. Plumbing and gas permit: WSSC.
  • Lanham and Adelphi. Building permit: DPIE. Municipal permit on top: None. Neither is incorporated, so there is no town permit office. Plumbing and gas permit: WSSC.

Bowie is the clearest case and the one most often missed. The city requires its own permit for any work that requires a county permit except plumbing, electrical, HVAC and fire inspection permits, and the city application asks you to upload the county permit and the approved plans. You cannot start the city permit until the county permit exists. Greenbelt states the rule in a single line on its construction permits page. The county's matrix puts College Park in the same category, with residential permits assigned to the municipality and the county together.

Laurel reverses the structure entirely. The city has adopted its own codes by reference with amendments, runs its own permit portal and publishes its own residential plan requirements, and the county's matrix hands Laurel the residential permits, the zoning review and the fire review. Laurel also requires all new residential and commercial buildings inside the city to be fully sprinklered.

Laurel addresses are the trickiest in the county for a separate reason. The mailing address reaches well past the city limits into unincorporated Prince George's County and north across the Howard County line, so the first thing to settle is which side of the boundary the house sits on. The county points homeowners at its PGAtlas map and the municipal boundary layer for exactly that question. Remodel Now remodels basements and builds home additions across Prince George's County, including Bowie, College Park, Greenbelt, Hyattsville, Laurel, Lanham, Adelphi and Riverdale Park.

What actually moves a basement to the high end here

Permits are the predictable part. The scope decisions underneath them separate a straightforward basement remodel from a long one.

Adding a bathroom is the biggest fork. If the basement slab sits below the sewer line, waste has to be lifted, which means a sealed ejector basin and a vent, and the slab gets cut and repoured. If a rough in was stubbed when the house was built, the job changes character entirely. Finding out which you have is worth doing before anyone draws a floor plan, because the location of that stub decides where the bathroom goes.

An egress opening is the second fork, and it depends on what the wall is made of. Cutting an opening and setting a well against a poured concrete wall in a newer Bowie or Greenbelt house is different work from cutting hollow block in a 1950s house in Adelphi or Riverdale Park, where the cut has to be bridged and the cores filled. Either way the ground outside comes out, and the area well has to tie into the foundation drainage.

The panel is the third. A house still on its original service may not have room for the circuits a finished basement needs, and that fix sits upstream of the basement. Low ceilings are the fourth, because dropping a soffit to hide a duct trunk eats headroom you may not have under the 7 foot rule. Posts and beams are the fifth: steel columns and the beam they carry are not optional, and designing a room around them is far less work than moving them.

Then there are the things that stop a job. A house built before 1978 puts any contractor disturbing painted surfaces under the EPA's Renovation, Repair and Painting Rule, which requires firm certification and lead safe work practices. EPA administers that program directly in Maryland. Much of the pre 1960 housing in Adelphi, Riverdale Park, Hyattsville and the older parts of Laurel falls inside it.

Dry first, framed second

A basement that leaks does not become a finished basement. It becomes a finished basement with a problem behind the drywall.

The order that works is unglamorous. Watch the walls and the slab through a wet stretch before anything gets built. Fix grading, downspout discharge and the ground around window wells from outside first, because water that is still arriving will find the inside of a stud bay eventually. Framing starts after that, not before.

Insulation is where the assembly is won or lost. Prince George's County sits in climate zone 4A, and the energy provisions Maryland adopts call for basement wall insulation of R-10 continuous or R-13 in the cavity, installed from the top of the basement wall down to 10 feet below grade or to the basement floor, whichever is less. The continuous option behaves better here. Rigid foam held tight against the concrete keeps the cold surface out of reach of humid interior air, so there is no cold face for moisture to condense on.

The failure that shows up over and over is the other approach: fiberglass batts in a stud wall held an inch off the block, with polyethylene sheeting stapled over the face of the studs. Warm humid air gets past the sheeting, reaches cold concrete and condenses. The batt stays wet because the poly will not let it dry inward and the concrete will not let it dry outward. Pick one moisture control layer and put it where the assembly can still dry in at least one direction. A contractor who cannot explain which layer is doing that job in your basement has not thought about it.

The floor matters too. A slab poured in 1958 usually has no vapor barrier under it, and carpet or engineered flooring laid straight onto it will telegraph that. A subfloor panel or a dimpled membrane that gives the slab a drying path is the difference between a floor that lasts and one that smells like a basement every August.

What to ask before you sign anything

Maryland home improvement contractors are licensed by the Maryland Home Improvement Commission, and the commission sets hard rules about what the paper has to say.

A home improvement contract must be in writing and legible, describe the work and the materials, be signed by each party, and carry the contractor's name, address and MHIC license number. It must state approximate dates for when the work will begin and when it will be substantially completed. It must include the commission's required notice, with MHIC's phone number and website and the statement that anyone can ask MHIC about a contractor. You have to receive a signed copy before work starts. A contractor cannot accept more than a third of the contract price as a deposit, and cannot accept any payment at all before the contract is signed.

The MHIC number is checkable through the commission's public license search in under a minute, and DPIE repeats the requirement on its own alteration page: unless the work is done by the homeowner, all home improvement projects require a contractor licensed with MHIC.

Beyond the license, four questions tell you most of what you need to know. Ask which permits this scope requires and who files each one. The answer should name the building permit from DPIE, the electrical permit from a Maryland licensed master electrician, the plumbing permit from a WSSC licensed master plumber, and either a municipal permit on top if the house is in Bowie, College Park, Greenbelt or Riverdale Park, or a city permit instead of a county one if it is in Laurel.

Ask whether the basement is being drawn with a bedroom in it, and make sure everyone agrees on the answer, because that is what decides whether an egress opening is in the scope.

Ask what happens if a rough inspection fails, and who pays to bring the inspector back.

Ask how the walls are getting insulated, described as an assembly rather than as an R-value, and where the one moisture control layer sits.

A basement is the one room in a house where structure, mechanical systems, the water table and the finish all meet in the same stretch of wall. Permits put a second set of eyes on the parts that disappear behind drywall for the next thirty years. To talk through what a basement in your house would actually involve, Remodel Now can be reached at (301) 798-4696, and the home additions side of the business handles the jobs that outgrow the foundation.

Sources

Frequently Asked Questions

Do I need a permit to finish a basement in Maryland?

Permit authority is the county, not the state, so the answer depends on where the house is. In Prince George's County, finishing a basement needs a building permit from the Department of Permitting, Inspections and Enforcement. The county's own guidance asks for a completed application form and a copy of the basement floor plans, and points applicants to its Finished Basement General Code Requirement document for what the drawings have to show. If the basement is getting a bathroom or a wet bar, a separate plumbing permit comes from WSSC, and any electrical work needs an electrical permit applied for by a Maryland licensed master electrician.

Who issues plumbing permits in Prince George's County?

The Washington Suburban Sanitary Commission, not the county. DPIE states on its own residential plumbing page that it does not review plumbing plans and does not issue any plumbing permits, and that all plumbing permits are issued by WSSC. WSSC keeps a satellite office inside DPIE and performs the plumbing inspections itself. WSSC rules also require that most plumbing work in Prince George's and Montgomery counties be done by a WSSC licensed plumber or gasfitter, and gas appliance installation by anyone other than a registered master gasfitter is prohibited.

Do I need an egress window to finish my basement?

Only if a sleeping room is part of the plan. The 2021 International Residential Code, which Prince George's County enforces alongside its own Subtitle 4, says in Section R310.7 that new sleeping rooms created in an existing basement must have emergency escape and rescue openings, and that other than new sleeping rooms, where existing basements undergo alterations or repairs, an emergency escape and rescue opening is not required. A rec room, office, gym or bathroom does not trigger one. Drawing the same space as a bedroom does, and that means cutting an opening through the foundation wall and building an area well outside it.

How do I find a licensed remodeling contractor in Prince George's County?

Start with the Maryland Home Improvement Commission license, because it is public and it is checkable in about a minute through the commission's license search. Maryland requires the contractor's name, address and MHIC license number to appear in the home improvement contract itself, along with a notice carrying the commission's phone number and website. DPIE repeats the requirement on its residential alteration page: unless the homeowner does the work, all home improvement projects require a contractor licensed with MHIC. Then ask separately for the master electrician's Maryland license and the plumber's WSSC license number, since those trades pull their own permits.

Does Bowie require its own permit on top of the county's?

Yes. The City of Bowie states that property owners are required to obtain permits from both Prince George's County and the City of Bowie for most improvements or alterations, and basement remodeling appears by name on the city's list of projects that need both. City permits are required for any work that requires a county permit, except plumbing, electrical, HVAC and fire inspection permits. The city application asks the applicant to upload the county permit and the county approved plans, so the county permit has to exist first. Greenbelt applies the same rule on its side.

Is Laurel different from the rest of Prince George's County?

Yes, and more than any other town in the county. The City of Laurel has adopted its own building codes by reference with amendments, runs its own permit portal and publishes its own residential plan requirements, and the county's municipal responsibility matrix assigns Laurel the residential permits, the zoning review and the fire review. Laurel also requires all new residential and commercial buildings inside the city to be fully sprinklered. Because a Laurel mailing address can sit inside the city, in unincorporated Prince George's County, or north of the Howard County line, confirming the boundary is the first step.

Do I need a use and occupancy permit after a basement remodel?

Usually not. In Prince George's County a use and occupancy permit is a business instrument. DPIE describes it as a permit stating that the business identified meets local zoning, safety and health requirements and may legally operate, and a new one is required when a change of tenant, occupant, use or ownership occurs with no construction involved. A homeowner finishing a basement in their own house is not changing the use of the building. The job closes out on the final inspections for the building, electrical and plumbing permits instead.

How long is a Prince George's County permit good for?

DPIE's permitting FAQ states that a permit under which no work has commenced within 180 days after issuance expires and becomes null and void, and cites Subtitle 4, Section 4-112. That clock runs from issuance, not from the application, which matters when a permit is pulled early to lock in a review and the job then waits on materials or financing. If a permit lapses before work starts, the application goes back in. Confirm current timelines with DPIE for your specific permit type before relying on them.

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