How to Get a Building Permit — Where to Apply and What You Need

Apply for residential or commercial permits at the building department.

Where to go

Residential and commercial permits are issued by your city or county building department. Browse every building department in our directory →

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Completed permit application
Plans / drawings
Site plan and construction drawings, often required in PDF or 3 paper copies
Proof of property ownership
Deed or recent tax bill
Contractor license
If using a contractor, their state license number
Payment
Fees scale with project value — bring card or check

Requirements vary by state and county — call the office to confirm before driving in.

Most building departments accept walk-ins but counter waits can be 1-2 hours. Submitting online or scheduling a plan-review meeting is faster.

Starting work before the permit is approved can trigger double fees or a stop-work order.
Plans often need a licensed architect or engineer's stamp for structural work.
Inspections must be scheduled — they're not automatic after approval.
Permits expire — usually 6-12 months without progress.

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Do I need a permit for small jobs?

Cosmetic work usually doesn't, but electrical, plumbing, structural, and roof work almost always do.

How long does approval take?

Simple residential permits: same day to 2 weeks. Commercial or new construction: 4-12 weeks.