Home Renovation Permits — What Requires One, What Happens If You Skip It, and How the Process Works
Skipping a permit is the single riskiest thing you can do in a home renovation. The short-term savings can cost you 10x when you sell, file an insurance claim, or need to fix someone else's unpermitted work.
Do I Need a Permit?
Select your project type to find out if a permit is typically required.
1Why permits exist and what they actually do
Why permits exist and what they actually do
Permits trigger inspections by your local building department. Those inspections verify that the work meets code — structural safety, electrical safety, fire safety, energy efficiency.
Without inspections, no one verifies the work was done correctly. The permit and inspection process is the only consumer protection you have against hidden bad workmanship.
2What typically requires a permit — reference table by project type
What typically requires a permit — reference table by project type
Always requires a permit
- Any structural work (removing walls, adding beams, foundation work)
- Any electrical work beyond simple fixture replacement
- Any plumbing beyond fixture replacement
- Any HVAC installation or replacement
- New construction of any kind
- Additions of any square footage
- Decks over 30 inches above grade in most jurisdictions
- Finishing a basement
- Any work that changes the home's footprint or height
- Fences over 6 feet in most jurisdictions
- Retaining walls over 4 feet
Usually requires a permit
- Reroofing (in most jurisdictions)
- Window and door replacements that change the opening size
- Water heater replacement
- Generator installation
- Swimming pool or spa installation
Usually does not require a permit
- Cosmetic work (paint, flooring, cabinetry that doesn't touch plumbing or electrical)
- Like-for-like fixture replacement (same location, same type)
- Landscaping
- Driveways in most jurisdictions
Varies by jurisdiction
- Bathroom remodels (depends on whether plumbing moves)
- Kitchen remodels (depends on scope)
- Fence installation
The rule of thumb:
If it involves structural changes, electrical, plumbing, HVAC, or changes to the building envelope — assume a permit is required and verify.
3The consequences of unpermitted work
The consequences of unpermitted work
When you sell
Unpermitted work must be disclosed in most states. It reduces your sale price, can kill deals, and may require retroactive permitting or removal before closing.
Retroactive permits
Getting a permit after work is completed typically costs 2–3x the original permit fee and requires opening walls to show inspectors what's inside. Sometimes the work must be removed entirely if it can't be verified.
Insurance claims
If you have a house fire caused by unpermitted electrical work, your insurer may deny the claim.
Mortgage refinancing
Appraisers flag unpermitted square footage. Lenders may refuse to include it in the appraised value.
Safety
Unpermitted work is simply more likely to be done incorrectly. The permit process exists because inspectors catch real problems.
4The permit process demystified
The permit process demystified
Who pulls the permit
Almost always the licensed contractor, not the homeowner, for permitted work. If a contractor says "you should pull the permit as the homeowner" — ask why. Sometimes this is legitimate for homeowner-owner-builder projects; often it's the contractor avoiding accountability.
What the contractor submits
Permit application, scope of work description, sometimes drawings or plans depending on complexity.
Plan review
For complex projects, the building department reviews submitted plans before issuing the permit. Timeline: 1–4 weeks for residential in most jurisdictions, up to 3–6 months in major metros.
Inspections
Occur at specific stages of construction (rough-in before walls are closed, final when work is complete). The contractor schedules these. You should know they're happening.
Certificate of Occupancy or Completion
Issued when final inspection passes. This is your documentation that the work was done and inspected.
5The permit fee question — who pays
The permit fee question — who pays
Permit fees should be included in your contractor's quote. If they're listed as a separate homeowner responsibility, that's unusual and worth questioning.
Typical permit fee ranges
| Permit Type | Fee Range |
|---|---|
| Simple plumbing or electrical permit | $50–$200 |
| Kitchen or bathroom remodel | $200–$500 |
| Addition | $500–$2,000+ |
| New construction | 0.5–2% of construction value |
6Dealing with your municipality
Dealing with your municipality
Most building departments have online portals to check permit status, find inspection results, and look up permit history on a property.
Looking up permit history before buying
Always pull permit history on any home you're buying. Unpermitted additions, finished basements, converted garages — all show up in the absence of a permit on record.
When to call the building department directly
If you're unsure whether your project requires a permit, call and describe what you're doing. They'll tell you. They'd rather you call than skip a required permit.
7Buying a home with unpermitted work
Buying a home with unpermitted work
How to identify it
Permit history lookup, appraisal flagging, visible work that doesn't match the listed square footage or bedroom/bathroom count.
How to negotiate
- Price reduction to cover retroactive permit cost
- Seller must obtain permit and pass inspection before close
- Escrow holdback
The home inspector's role
Good home inspectors flag "appears unpermitted" for work that looks like it was done without a permit — no permit notices in panel, additions that don't match the original construction style or quality.
Find contractors who always pull proper permits
Get matched with vetted local contractors who handle permits the right way — every time.