Window Replacement Cost in District of Columbia
Locally calibrated hire vs. DIY cost data for window replacement projects in District of Columbia. Cited sources, permit requirements, and a full build guide, free.
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HIRE A PRO
$6,200–$17,400
Fully installed, labor + materials
DIY COST
$3,500–$9,400
Materials + rentals, your labor free
Complex project, structural or code-critical work involved.
Government Data · Government Data · Submitted Quotes (n=0)
How we got these numbers
National benchmark costs from RSMeans, Angi, Fixr, and HomeGuide are adjusted for District of Columbia using two federal datasets: the Bureau of Economic Analysis Regional Price Parity (RPP) index and the Bureau of Labor Statistics (BLS) Occupational Employment and Wage Statistics. District of Columbia's RPP is 1.2 (national baseline = 100) and its BLS labor adjustment factor is 1.30. Higher RPP means goods and services cost more relative to the national average; the BLS factor scales contractor labor rates to local wage levels. We blend these two adjustments, weighted 40% RPP, 60% BLS labor, to produce the ranges shown above.
adjusted_cost = national_benchmark × (0.4 × RPP/100 + 0.6 × bls_labor_adj)
RPP(District of Columbia) = 1.2 · BLS adj = 1.30
What's included
| Item | Qty | Unit Cost | Subtotal |
|---|---|---|---|
| Replacement windows, vinyl double-hung | 10 windows | $350 | $3,500 |
| Flashing tape and house wrap | 1 kit | $120 | $120 |
| Low-expansion foam and exterior caulk | 1 kit | $80 | $80 |
| Interior trim and shims | 1 set | $150 | $150 |
| Materials Total | $3,850 | ||
Tools you'll need
See the tools we'd buy →TOOLS YOU PROBABLY OWN
- Pry bar, utility knife, and caulk gun
- Level and tape measure
TOOLS TO RENT OR BUY
Reciprocating saw, full-frame only
Rent if you do not own one
Build sequence
- 1
Measure each opening precisely and order the right size.
COMMON MISTAKE
A window ordered to the wrong size is a costly, non-returnable mistake.
- 2
Remove the old sash and frame without damaging the surrounding wall.
- 3
Dry-fit the new window, then flash the sill and jambs to manage water.
COMMON MISTAKE
Skipping or reversing the flashing lets water into the wall.
- 4
Set the window level, plumb, and square, then shim and fasten.
- 5
Seal and insulate the gaps, then install interior and exterior trim.
Permits and code requirements
PERMIT REQUIREMENTS
Permit rules for window replacement vary by city and county in District of Columbia. Most structural, electrical, plumbing, or mechanical work needs a permit and an inspection. Confirm with your local building department, or see the District of Columbia guide for specifics.
PERMIT THRESHOLD
Varies by municipality
Disclaimer: Always verify permit requirements with your local building department before starting work. Requirements vary by municipality and are updated periodically.
Frequently asked questions
NEXT STEPS
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Get the complete step-by-step Blueprint or connect with a vetted local pro in District of Columbia.
UPDATED JUNE 2026