Permit type guide · ranked #11 nationally
Window & door replacement permits — complete guide (2026)
Like-for-like window replacement often doesn't require a permit. Creating a new opening or changing the size almost always does. Energy code compliance is a key driver of permit requirements.
National avg: $50–$250
Approval: 1–5 days
All 50 states
#11 by volume
~130KIssued annually
$50–$250National avg cost
1–5 daysTypical approval
1–2%Share of all permits
The key question is whether you're changing the size of the opening. Same-size replacement in the same opening: usually no permit. Enlarging a window, adding a new window, or converting a window to a door: permit required in virtually all jurisdictions.
When you need a window and door permit
| Work type | Permit required? | Notes |
|---|---|---|
| Enlarging an existing opening | Always | Structural header change |
| New window in solid wall | Always | New structural opening |
| Converting window to door | Always | Load-bearing change |
| Adding egress window (basement) | Always | Size requirements apply |
| Like-for-like replacement (same size) | Usually not | No structural change |
| Storm window addition (exterior) | Usually not | No structural change |
| Door hardware replacement | Never | No structural work |
How to get a window and door permit — step by step
1
Determine if your project triggers a permit
Measure your existing opening. If the new window or door is the same size and you're not touching the framing, you likely don't need a permit.
2
Check energy code requirements
Even for like-for-like replacements, some states require new windows to meet current energy codes (U-factor, SHGC ratings). California and Washington are the strictest.
3
Apply if needed
Submit opening dimensions, window/door specs, and head height for egress windows. Most jurisdictions process these quickly.
4
Installation
For structural opening changes, a rough inspection before drywalling may be required. For simple replacements, a single final inspection is typical.
Cost by project type
| Project | Permit fee range | Typical timeline |
|---|---|---|
| Like-for-like window replacement | $0–$50 | Same day if needed |
| Window enlargement | $75–$200 | 1–3 days |
| New window in solid wall | $100–$250 | 2–5 days |
| Egress window (basement) | $100–$250 | 2–5 days |
| Exterior door replacement | $50–$150 | 1–3 days |
| Sliding door addition | $100–$250 | 2–5 days |
Frequently asked questions
Do I need a permit to replace all my windows?
If you're replacing every window with the same size in the same opening, typically no permit is required. However, California, Washington, and a few other states have energy code requirements that may trigger a permit even for replacements.
What is an egress window?
An egress window is a window large enough for a person to escape through in an emergency. Building codes specify minimum opening dimensions (typically 5.7 sq ft, 24 inches high, 20 inches wide). Required in all sleeping rooms.
Can I do window replacement myself?
Yes. Window replacement is one of the most common DIY projects and rarely requires a permit for like-for-like replacement. For new openings, you'll need a permit and may need a structural engineer to design the header.
What is a U-factor?
U-factor measures how well a window insulates. Lower is better. Most states now have minimum U-factor requirements for replacement windows under energy codes — typically U-0.30 or lower.
Data sources: Shovels.ai national permit aggregator · US Census Bureau BPS · IRC/IBC 2024