Building Permit

A building permit is official approval from your local government to start construction or renovation work — and skipping it to save time can cost you far more than the permit ever would.

When You Need One

Generally, you need a permit for any structural work, electrical changes, plumbing modifications, HVAC installation, new roofing, window replacements that change the opening size, additions, decks, fences over a certain height, and demolition. You typically don’t need one for painting, flooring, countertop replacement, or basic cosmetic updates.

The gray area trips people up. Replacing a water heater? Permit required in most jurisdictions. Finishing a basement? Permit required. Building a shed under 120 sq ft? Might be exempt, might not — it depends entirely on your municipality.

Costs and Timeline

Permit fees range from $50 for minor work to $2,000+ for major renovations or new construction. Some jurisdictions charge a flat fee; others calculate based on project value (typically 1-2% of construction cost). A $50,000 kitchen renovation might carry a $500-$1,000 permit fee.

Processing takes 1-4 weeks for simple projects and 2-6 months for major construction. Plan applications are reviewed for code compliance, structural integrity, fire safety, and zoning conformance. Revisions and resubmissions add time.

What Happens Without a Permit

Unpermitted work creates real problems. If discovered, the city can issue stop-work orders and fines ($500-$10,000+). They can require you to tear out completed work. At resale, unpermitted work must be disclosed and often reduces the home’s value — buyers and appraisers treat it as a liability. Insurance may deny claims related to unpermitted work. And if the work causes a fire or structural failure, you’re fully exposed.

The renovation ROI calculator factors in permit costs when estimating project returns, and the home services hub helps you find contractors who pull permits properly.