Basement Finishing Cost in Gaithersburg, MD
Based on 111 basement finishing building permits filed in Gaithersburg between 2015 and 2026, the typical declared project value is $20,000, with most landing between $20,000 and $40,000. These are real records from Gaithersburg's public building-permit data, declared job values, not contractor estimates or AI guesses.
No neighbor receipts in Gaithersburg yet. Paste a quote to see how it compares to these permit values, or add what you paid to start the real price record here.
Basement Finishing values over time in Gaithersburg
Median declared value moved from $23,500 in 2017 to $20,000 in 2025, down 15% over that span. Each year below is computed from the filings that actually cleared in Gaithersburg.
Recent basement finishing permits in Gaithersburg
Actual filings from Gaithersburg's public permit records. Declared job values, not final paid prices.
| Filed | Declared value | Work described |
|---|---|---|
| 2026-06-10 | $50,000 | We are finishing the basement that is completely unfinished. There is a gym area, full bat |
| 2026-03-25 | $8,000 | Interior work only,FINISH BASEMENT BY CONSTRUCT PARTITIONS FOR TWO NEW BEDROOMS WITH TWO N |
| 2026-02-17 | $28,000 | Customer Wants To Use ePlans Interior work only,Add bathroom to existing finished basemen |
| 2026-01-20 | $37,500 | Customer Wants To Use ePlans Interior work only,FINISHING BASEMENT |
| 2025-12-23 | $9,500 | Dividing a section of the unfinished basement area and finishing it to convert it into a g |
| 2025-12-18 | $13,500 | Revision 1136794 - Moved one window from the back to the right side wall in the front Cust |
| 2025-11-13 | $10,000 | Interior work only,Finishing basement, adding rec room, office and den. Also finishing rou |
| 2025-10-01 | $86,000 | Customer Wants To Use ePlans Interior work only,Alter existing finished basement, add show |
| 2025-10-01 | $35,000 | Upgrade existing finished basement by remove one existing partition wall and reframe for a |
| 2025-09-17 | $20,000 | Finish basement with rec area, wet- bar (rough-in only), bathroom, bedroom, office and unf |
| 2025-09-02 | $68,000 | Remodel the existing finished basement to include a gym, recreation room, snack bar, bathr |
| 2025-08-21 | $20,000 | Finish the basement and add two egressed windows. |
| 2025-07-21 | $50,000 | Interior work only, Finished basement basement will have a standard bathroom , a gym area, |
| 2025-05-12 | $70,000 | Interior work only, FINISH BASEMENT - NO STRUCTURAL CHANGES. ADD ONE FULL BATHROOM ADD ONE |
| 2025-04-24 | $75,000 | Interior work only,We are finishing a basement to include a large recreation area, a |
Paid for basement finishing in Gaithersburg? Your receipt becomes the first real neighbor price on this page.
Add your price →How to read these numbers
A permit's declared value is the job cost the owner or contractor stated when they pulled the permit. It tracks the real cost of the work but can run a bit under what was actually paid, since it often leaves out some labor and finish costs. Treat the range as a grounded starting point. What basement finishing actually costs in Gaithersburg comes down to home size, materials, and scope.
Where this comes from
Every figure is pulled from Gaithersburg's public building-permit records and classified by the work described. Nothing is estimated or AI-generated. How the data works. The moment a Gaithersburg homeowner adds a real receipt, this page upgrades to show what neighbors actually paid next to these permit values.
Paid for basement finishing in Gaithersburg?
Add what you actually paid. It's anonymous, takes a minute, and turns this permit estimate into a real neighbor price the next homeowner can trust.
Add your price →