Window Replacement Cost in Gaithersburg, MD
Based on 137 window replacement building permits filed in Gaithersburg between 2015 and 2026, the typical declared project value is $5,000, with most landing between $3,000 and $10,000. These are real records from Gaithersburg's public building-permit data, declared job values, not contractor estimates or AI guesses.
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Window Replacement values over time in Gaithersburg
Median declared value moved from $3,900 in 2020 to $9,250 in 2025, up 137% over that span. Each year below is computed from the filings that actually cleared in Gaithersburg.
Recent window replacement permits in Gaithersburg
Actual filings from Gaithersburg's public permit records. Declared job values, not final paid prices.
| Filed | Declared value | Work described |
|---|---|---|
| 2026-06-02 | $3,000 | Interior work only, Remove (1) Existing basement window & replace it w/ (1) Egress to |
| 2026-03-18 | $7,000 | Customer Wants To Use ePlans Interior work only,Remove (3) existing basement windows & re |
| 2026-01-29 | $3,000 | Interior work only,Remove (1) Existing basement window & replace it w/ (1) Egress to c |
| 2025-08-11 | $1,500 | Interior work only,Replace the existing window by egress window 31'' W x 37'' H |
| 2025-07-24 | $14,688 | Enlarging existing window opening in Master Bedroom to install a sliding glass d |
| 2025-07-11 | $30,000 | Increase the existing window opening size at the rear of the house and create two new egre |
| 2025-05-08 | $3,000 | Customer Wants To Use ePlans Interior work only,Remove (1) Existing basement window & rep |
| 2025-04-30 | $2,000 | Interior work only, Bay window alteration. |
| 2025-04-24 | $8,500 | Customer Wants To Use ePlans,Installing a bay window on the side of the house. |
| 2025-04-03 | $15,183 | Interior work only,COMBINE 2 EXISTING WINDOWS TO ONE LARGE OPENING, BUILD NEW HEADER, INST |
| 2025-03-13 | $5,000 | Customer Wants To Use ePlans,Construction of an exterior CMU staircase to the basement of |
| 2025-03-04 | $16,000 | Rear COVERED porch 4' x 9'-4"" and new egress window well 4' x 4' |
| 2025-02-21 | $10,000 | Alteration to the basement window to the egress window and add one additional floor joist. |
| 2025-02-14 | $3,000 | Interior work only,Remove (1) Existing basement window & replace w/ (1) Egress to code |
| 2025-01-07 | $16,500 | Customer Wants To Use ePlans,Installation of two BK4040 Egress windows and egress wells |
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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 window replacement 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.
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