Key takeaways
- Cost vs. Value 2025 puts a basement remodel at $51,409 in job cost in the South Atlantic region, which includes Maryland, with 76% recouped at resale.
- That Cost vs. Value scope is a 20-by-30-foot finished room with a wet bar and a 5-by-8-foot full bathroom.
- Baltimore County does not require a building permit to finish a basement unless you add a bedroom, excavate, make structural changes, or the house is in a flood zone, historic district or the Critical Area.
- Baltimore City charges $0.30 per square foot of affected floor area for alterations to one- and two-family homes, with a $50 minimum.
- The MHIC Guaranty Fund pays up to $30,000 per claimant, and it is not available to homeowners who hire unlicensed contractors.
Finishing a basement in the Baltimore area costs about the same as the rest of the South Atlantic region in the 2025 Cost vs. Value report. The report puts its basement remodel, a finished room with a wet bar and a full bathroom, at $51,409 in job cost for the region, and $52,757 in Washington, DC, the nearest city in the report. A simpler finish without a bathroom or bar costs much less. Water problems, a bathroom and egress windows are what move the number most.
How to read these numbers: figures credited to a named report are quoted from it. The range labeled “Renovexus planning estimate” is ours: we take the lower of the South Atlantic and Washington, DC basement job costs minus 25 percent, and the higher one plus 25 percent, rounded to the nearest $1,000. The band exists because the report prices one defined basement, and yours will differ in size and finish. Get written bids before you set a budget.
Costs at a glance
| Scope | Job cost | Source |
|---|---|---|
| Basement remodel with wet bar and full bath, South Atlantic region | $51,409 | Cost vs. Value 2025, South Atlantic |
| Same project, Washington, DC | $52,757 | Cost vs. Value 2025, Washington, DC |
| Same project, national average | $52,012 | Cost vs. Value 2025 |
| Basement finish with a bathroom and bar, Baltimore area | $39,000 to $66,000 | Renovexus planning estimate (method above) |
| Basement finishing, national range | $15,000 to $75,000 (average $32,000) | Angi, 2026 |
| Basement finishing, national per square foot | $7 to $23 per sq ft | Angi, 2026 |
| 1,000 sq ft basement, national | $7,000 to $23,000 | Angi, 2026 |
Which region is Maryland in? The Cost vs. Value report does not print a list of states for each region. Its region names follow the U.S. Census Bureau’s divisions, and the Census Bureau places Maryland in the South Atlantic division, with Delaware, DC, Virginia and the Carolinas, not in the Middle Atlantic. The report has no Baltimore page, so we show Washington, DC as the nearest city.
Why Angi and Cost vs. Value look so different. Angi’s per-square-foot range covers everything from a half-finished basement to a full build-out. The Cost vs. Value project is a specific, fairly complete job that includes a full bathroom and a wet bar with cabinets and an under-counter refrigerator. If your plan is a family room with no plumbing, expect to land well below the Cost vs. Value figure. If it includes a bathroom, start from it.
What the Cost vs. Value basement includes
The project description finishes the lower level into a 20-by-30-foot entertaining area with a wet bar and a 5-by-8-foot full bathroom, plus 24 linear feet of partition to enclose the mechanical area. Walls and ceilings are painted drywall, exterior walls are insulated, and there are five six-panel doors. The bar has 10 linear feet of oak cabinets with laminate counters, a stainless bar sink and an under-counter refrigerator. The main room gets 15 recessed lights, three surface-mounted fixtures and laminate flooring. The bathroom has a toilet, a vanity with cultured marble top, vinyl flooring, a fiberglass shower, a fan-light and a recessed medicine cabinet.
The report estimates that project recoups 76 percent of its cost at resale in the South Atlantic region, 75.7 percent in Washington, DC and 71 percent nationally.
What drives the cost
All figures in this section are national, from Angi.
Water first. Angi puts basement waterproofing at about $4,400 on average, or $5 to $10 per square foot, and a sump pump at around $575 installed. Fix moisture before anyone frames a wall.
A bathroom. Angi lists shower installation at $1,100 to $8,500, a toilet at $225 to $530 and a sink at $215 to $660, before the plumbing to reach them. The bathroom is a large part of why the Cost vs. Value basement costs what it does.
Egress windows. Angi puts an egress window at $200 to $950 per window for the window and installation, and says you will pay more for permits and for excavation if a window well has to be dug.
Walls, ceilings and floors. Angi lists framing at $7 to $16 per square foot, drywall at $1.50 to $3, a ceiling at $9 to $13, and flooring at $1,500 to $4,500 for a typical basement.
Heating and cooling. Angi puts HVAC for a basement at $2,000 to $3,000.
Labor. Angi says professional labor is roughly 20 percent of the total, with a general contractor’s fee built into the quote.
Code basics: egress and ceiling height
The figures below come from the 2021 edition of the International Residential Code, a model code. Your county may enforce a different edition or local amendments, so confirm with its permit office. In the 2021 IRC:
- R310.1: basements and every sleeping room need at least one operable emergency escape and rescue opening, and a basement with sleeping rooms needs one in each sleeping room.
- R310.2: the opening needs a net clear area of at least 5.7 square feet, a clear height of at least 24 inches, a clear width of at least 20 inches, and a sill no more than 44 inches above the floor.
- R305.1: habitable space, hallways and the parts of basements that contain them need a ceiling height of at least 7 feet. Bathrooms and laundry rooms need at least 6 feet 8 inches.
If your basement falls short on ceiling height or has no window that can become an egress opening, ask about it before you get bids. Both are expensive to fix after the fact.
Permits in Baltimore City and the surrounding counties
Baltimore County. The county’s basement alteration page says a building permit is not required to convert unfinished basement space into finished space unless the job adds one or more bedrooms, involves excavation, makes structural changes or moves a bearing wall, or the property is in a flood zone, historic district or the Chesapeake Bay Critical Area. Plumbing, gas and electrical work still need trade permits pulled by a master plumber or electrician licensed with Baltimore County. Applications go through the county’s online permit portal.
Baltimore City. Building Code § 109 sets alteration fees for one- and two-family homes at $0.30 per square foot of affected floor area, with a $50 minimum. The application fee is $25 without plan review or $125 with it, and a 5 percent permit tax is added. As our own arithmetic for a 600-square-foot basement (the Cost vs. Value size) with plans: $180 plus $125 plus $9 in tax, or about $314 before trade permits. DHCD’s worked example, a 1,400-square-foot rowhouse renovation with new plumbing, electrical and a 200-amp service, comes to about $737. Apply through the city’s E-Permits system. § 105 exempts interior painting, papering, tiling, carpeting, cabinets and countertops from a building permit.
Howard County. The FY2027 schedule charges a $25 nonrefundable filing fee for alterations to single-family homes, plus $50 for a single room or area of 200 square feet or less, or $100 for more than that. A 10 percent technology fee is collected on all permits.
Anne Arundel County. The county fee table (effective October 1, 2024) bases building permits on the estimated value of the work: $242 for $20,001 to $25,000, then $242 plus 0.010 times the cost above $25,000. A $43 application fee is added. Residential electrical for an alteration with no service change is $95 for any number of devices, and plumbing is $51 for the first fixture plus $8 for each additional one. As our own arithmetic, a $50,000 basement comes to $492 plus $43 for the building permit, and a three-fixture bathroom adds $67 in plumbing, before the $95 electrical permit.
Check the contractor’s MHIC license
In Maryland, only contractors licensed by the Maryland Home Improvement Commission may contract with homeowners for home improvement work. The MHIC’s consumer page says it is a criminal offense to do home improvements without a license.
- Look it up. Search the company on the Maryland Department of Labor’s home improvement license search.
- Know what the license buys you. The Guaranty Fund can repay up to $30,000 per claimant or the amount paid to the contractor, whichever is less, with a cap of $250,000 across all claimants against one contractor. It is not available to homeowners who hire unlicensed contractors.
- Follow the MHIC’s tips. Check references, get a copy of the contractor’s current liability insurance certificate, always get a written contract, pay no more than one-third of the contract price as a down payment, and if a building permit is needed, ask to see it before work starts.
In Baltimore County, also check that the plumber and electrician pulling the trade permits are licensed with the county. Our Maryland license guide shows each step.
How to compare quotes
- Ask about water first. Every bid should say whether waterproofing or a sump pump is included, or why it is not needed.
- Compare the same scope. Square footage, whether there is a bathroom, how many egress windows, and the flooring and ceiling type. A no-bathroom family room and the Cost vs. Value basement are different jobs.
- Ask which permits apply in your jurisdiction. In Baltimore County, a straightforward finish may need only trade permits. In Baltimore City, Howard and Anne Arundel, ask for the building permit fee in the quote.
- Check the MHIC license and the trade licenses before you pay a deposit, and keep the deposit at or under one-third.
- Get line items for the bathroom and egress windows. They are the most expensive single items in most basement jobs.
FAQ
How much does it cost to finish a basement in Baltimore?
The 2025 Cost vs. Value report puts a basement remodel with a wet bar and a full bathroom at $51,409 in the South Atlantic region, which includes Maryland, and $52,757 in Washington, DC. Our planning estimate for that kind of finish in the Baltimore area is $39,000 to $66,000. Angi’s national range for all basement finishing is $15,000 to $75,000, averaging $32,000.
Do I need a permit to finish a basement in Baltimore County?
Not a building permit, unless the job adds a bedroom, involves excavation or structural changes, or the house is in a flood zone, historic district or the Chesapeake Bay Critical Area. Plumbing, gas and electrical work still need trade permits pulled by a master plumber or electrician licensed with Baltimore County.
What does a basement permit cost in Baltimore City?
Baltimore City charges $0.30 per square foot of affected floor area for alterations to one- and two-family homes, with a $50 minimum, plus a $25 or $125 application fee and a 5 percent permit tax. By our arithmetic, a 600-square-foot basement with plan review comes to about $314 before trade permits.
Does a basement bedroom need an egress window?
Yes. Under the 2021 International Residential Code, every basement sleeping room needs an emergency escape and rescue opening with at least 5.7 square feet of net clear area, at least 24 inches of clear height, at least 20 inches of clear width, and a sill no more than 44 inches above the floor.
What protects me if a Maryland contractor does not finish the job?
The MHIC Guaranty Fund can repay up to $30,000 per claimant, or the amount paid, whichever is less, but only if the contractor was licensed by the MHIC. Check the license before you sign and pay no more than one-third of the contract price up front.
Looking for basement contractors around Baltimore? Browse license-checked pros in Maryland, or by town in Baltimore, Ellicott City, Columbia, Annapolis and Glen Burnie. County lists: Baltimore City, Baltimore County, Howard County, Anne Arundel County.
Sources
- JLC/Remodeling Cost vs. Value 2025: South Atlantic Region jlconline.com
- JLC/Remodeling Cost vs. Value 2025: Washington, District of Columbia jlconline.com
- JLC/Remodeling Cost vs. Value: Basement Remodel project description jlconline.com
- U.S. Census Bureau: Census Regions and Divisions of the United States www2.census.gov
- Angi: How Much Does It Cost to Finish a Basement? (updated Jul 9, 2026) angi.com
- ICC: 2021 International Residential Code, Chapter 3 (R305 ceiling height, R310 emergency escape) codes.iccsafe.org
- Baltimore County: Basement Alteration Permit baltimorecountymd.gov
- Baltimore City Building Code § 109: Fees codes.baltimorecity.gov
- Baltimore City Building Code § 105: Permits codes.baltimorecity.gov
- Baltimore City DHCD: Building Permits baltimorecity.gov
- Howard County DILP: Building Permit Fee Schedule (Resolution #83-2026, effective July 1, 2026) howardcountymd.gov
- Anne Arundel County Inspections and Permits: Permit Fees aacounty.org
- Maryland Home Improvement Commission labor.maryland.gov
- MHIC: Guaranty Fund FAQ labor.maryland.gov
- MHIC: Consumer Advice labor.maryland.gov
- Maryland Department of Labor: Home Improvement license search dllr.state.md.us
