The 7 Steps of the Building Permit Process
The permit process follows the same general sequence in every US jurisdiction, though timelines and specific requirements vary significantly by city and project type.
Before spending money on plans, verify your project is allowed on your property. Visit your city's zoning portal or call the planning department to confirm setbacks, height limits, and use requirements. If you are in Texas, also review your deed restrictions — many Texas subdivisions have covenants that prohibit secondary structures or specific project types regardless of city zoning.
Most permit applications require construction drawings prepared by a licensed architect or designer. Plans must show floor plans, elevations, sections, and all applicable code compliance details including electrical, plumbing, and structural layouts. For simple projects, a draftsperson may suffice. For structural changes, an engineer stamp is required.
Submit your application through the city's portal (online submission is now standard in most major cities) or in person at the building department. Your application package typically includes: completed permit application form, construction drawings (2 to 3 sets), site plan showing property lines and structure location, energy compliance documentation (required in California), and payment of the permit fee.
Plan reviewers check your submitted drawings for compliance with local building codes, zoning requirements, fire safety standards, and energy codes (Title 24 in California). This is the step that takes the longest in high-volume cities. San Francisco's median plan review time is 209 days. Austin averages 22 days. Most cities fall between 3 and 8 weeks. You will receive a correction list if the plans do not pass on the first review.
Once plans are approved, the city issues the permit upon payment of all remaining fees. At this point you receive a physical permit card (or digital permit number) that must be posted at the job site in a visible location throughout construction. Construction cannot legally begin until the permit is in hand.
Most building permits require multiple inspections at defined stages of construction — foundation, framing, rough electrical, rough plumbing, rough HVAC, insulation, and final. Each inspection must be requested in advance (typically 24 to 48 hours notice) and passed before the next phase of work can proceed. A failed inspection adds 1 to 2 weeks for corrections and re-inspection.
After all required inspections pass, the building department issues a Certificate of Occupancy (CO) or a final sign-off on the permit. The CO is the legal document confirming the structure is safe and code-compliant. New construction and ADUs require a CO before legal occupancy. Most remodels receive a final inspection sign-off rather than a separate CO. In most cities, the CO is issued within 2 to 4 weeks of final inspection.
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Permit Timeline by Project Type
Timeline estimates cover the period from application submission to permit issuance. Inspection time during construction is additional.
| Project Type | Total Timeline | Plan Review | Inspections Required |
|---|---|---|---|
| Simple Repair (OTC) | 1–3 days | Same day | 1 |
| Bathroom Remodel | 3–8 weeks | 1–2 weeks | 2–3 |
| Kitchen Remodel | 4–10 weeks | 2–4 weeks | 2–4 |
| Room Addition | 6–16 weeks | 3–8 weeks | 4–6 |
| ADU (California) | 8–14 weeks | 4–8 weeks | 5–8 |
| ADU (Texas) | 4–10 weeks | 2–5 weeks | 4–7 |
| New Home | 8–24 weeks | 4–12 weeks | 6–10 |
| New Home (San Francisco) | 6–18 months | 3–7 months | 6–10 |
Documents Required for a Building Permit Application
| Document | When Required | Notes |
|---|---|---|
| Permit Application Form | Always | Available on city website or at building department |
| Site Plan / Plot Plan | Almost always | Shows property lines, existing structures, and proposed work location |
| Floor Plans | Almost always | Dimensioned drawings showing layout of each level |
| Elevations | New construction / additions | Front, rear, and side views of the structure |
| Structural Calculations | Structural work | Required when removing or adding load-bearing elements |
| Energy Compliance (Title 24) | California only | Required for all new construction and major remodels in CA |
| Soils Report | New construction | Required in some jurisdictions, especially for hillside or poor-soil sites |
| Contractor License Number | Always | CSLB in California; TDLR in Texas |
Related Permit Tools and Guides
Free — all project types, all US cities
→National Permit Cost GuideAverage costs by project type and state
→Do I Need a Permit?Full checklist — what requires a permit
→California Permit GuideLA, SF, San Diego permit costs
→Texas Permit GuideHouston, Dallas, Austin permit costs
→Bid AnalyzerIs your contractor quote too high?
→Frequently Asked Questions
How long does the building permit process take?
The building permit process takes 1 day for simple OTC (over-the-counter) permits to 18 months for complex new construction in high-volume cities like San Francisco. Most residential projects fall between 3 and 12 weeks. The biggest variable is plan review time. Austin averages 22 days for plan review. San Francisco averages 209 days based on 2026 permit data. Submitting a complete, code-compliant application the first time is the single most effective way to reduce timeline.
What documents do I need to apply for a building permit?
The standard permit application package includes a completed permit application form, a site plan showing the property and structure location, floor plans drawn to scale, elevations for additions or new construction, and payment of permit fees. California requires Title 24 energy compliance documentation for all new construction. Structural changes require engineer-stamped structural calculations. Simple OTC projects (water heater replacement, electrical panel upgrade) typically require only the application form and payment.
What is an over-the-counter (OTC) permit?
An over-the-counter (OTC) permit is a building permit that is reviewed and issued at the building department counter on the same day — no plan review queue required. OTC permits are available for simple, standardized projects like water heater replacements, electrical panel upgrades, roofing permits, and minor plumbing repairs. Many cities also offer OTC approval for small ADU projects using pre-approved plan sets. If your project qualifies, OTC can reduce your permit timeline from weeks to hours.
How many inspections are required during construction?
The number of required inspections depends on the project type. Simple remodels require 2 to 4 inspections (rough work and final). Room additions require 4 to 6 inspections. New construction and ADUs require 6 to 10 inspections at defined construction stages: foundation, framing, rough electrical, rough plumbing, rough mechanical, insulation, and final. Each inspection must be requested in advance (24 to 48 hours notice) and passed before work can proceed to the next phase.
Can I start construction before the permit is approved?
No. Construction cannot legally begin until the permit is issued and posted at the job site. Some cities allow early foundation or site work permits for large projects, which allow grading and foundation work to proceed before the full building permit is issued. In most cases, any work performed before permit issuance is considered unpermitted and subject to fines, stop-work orders, and mandatory permit-after-the-fact fees at 1.5 to 3 times the standard cost.
What is a Certificate of Occupancy and do I need one?
A Certificate of Occupancy (CO) is the legal document issued by the building department after all inspections pass, confirming the structure is safe and code-compliant for occupancy. New construction and ADUs require a CO before legal occupancy. Most remodels receive a final inspection sign-off rather than a separate CO. The CO is required for home sales, mortgage financing, and rental compliance. Keep your CO in your permanent property records — it may be requested years later during a sale or refinancing.
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