One of the most common questions homeowners and contractors ask before starting a project is how long the permit process will take. The honest answer: it depends entirely on the city, the project type, and whether your application is complete when submitted.
The Permit Timeline: What the Process Looks Like
Most permit applications go through several stages before approval. First, you submit your application along with any required plans and documentation. The building department then performs a plan check — reviewing the submitted documents for code compliance. Once approved, the permit is issued and work can begin. Throughout construction, inspections occur at specified milestones. At the end, a final inspection closes the permit.
The plan check phase is where most delays happen. A complete, well-prepared application with accurate plans moves through much faster than one that requires revisions. Working with an experienced contractor or permit expediter who knows what a specific city's reviewers look for can dramatically reduce review time.
Processing Times by City
| City | Simple Projects | Complex Projects | Express Option? |
|---|---|---|---|
| New York City | 6–10 weeks | 3–6 months | Self-certification for some |
| Los Angeles | 1–4 weeks | 6–14 weeks | Express Permit for simple work |
| Chicago | 1–3 weeks | 4–10 weeks | Self-certification for licensed architects |
| Houston | 1–2 weeks | 3–6 weeks | Online system, generally fast |
| Phoenix | 1–3 weeks | 4–8 weeks | Accela portal, online submission |
| Denver | 2–4 weeks | 6–12 weeks | eDevelopment portal |
| Seattle | 3–6 weeks | 8–16 weeks | Express review available |
| Miami | 2–6 weeks | 6–14 weeks | ACA portal, expedited available |
| Austin | 1–3 weeks | 4–8 weeks | Austin Build + Connect portal |
| Portland | 2–4 weeks | 6–12 weeks | PermitPortland system |
Why NYC Takes So Long
New York City has by far the longest permit timelines of any major U.S. city, for several reasons. Most residential projects require an Alt-2 application filed by a licensed architect or professional engineer. The DOB NOW portal processes a high volume of applications. And the city's complex zoning and building codes mean plan reviewers have more to check. Hiring a permit expediter — a professional who specializes in navigating the NYC DOB process — can reduce timelines significantly and is common practice for renovation projects in the city.
Express Permits: When You Can Skip the Wait
Many cities offer express or over-the-counter permits for simpler projects that don't require full plan review. Los Angeles's Express Permit program covers work like re-roofing, water heater replacements, and small additions. Chicago's self-certification program allows licensed architects to certify code compliance without a full plan review for certain project types. Houston's online system processes many residential permits the same day.
To qualify for express permits, work must be straightforward and clearly meet code without detailed review. As soon as a project involves structural changes, new plumbing layouts, or anything out of the ordinary, express programs typically don't apply.
How to Speed Up Your Permit
The single most effective way to speed up a permit is to submit a complete, accurate application the first time. Incomplete applications get kicked back for revisions, adding weeks to the timeline. Work with a contractor who has experience with your local building department and knows exactly what the plan reviewers want to see.
For complex projects in cities with backlogs, a permit expediter can be worth the cost. These professionals know the system, have relationships with department staff, and can identify potential issues before submission. In NYC, many renovation projects use expediters as a matter of course.
Finally, check your city's online portal status regularly. Many departments allow applicants to track their application status and respond to reviewer comments electronically, which can cut days or weeks off the process compared to waiting for mail correspondence.