How Long Does Permit Approval Really Take?

The honest answer: it depends, and here's why

Every jurisdiction in the country runs its own building department, with its own staffing levels, its own queue, and its own review process. A permit for a home addition might clear review in under two weeks in one county and take two months in the next county over, even for a nearly identical scope of work. That's not a knock on any particular department. It reflects real differences in how many reviewers are on staff, how many applications are in the queue ahead of yours, and how the department is structured to review residential projects.

Anyone, including a drafting company, a contractor, or a well-meaning neighbor, who gives you a specific number without knowing your jurisdiction and project scope is estimating, not reporting fact. Treat any timeline you hear before you've talked to your local building department as a rough guess, not a plan you can build a schedule around.

What actually drives permit timelines

While no two jurisdictions work exactly alike, the factors that push a timeline longer or shorter are consistent. Understanding them helps you set realistic expectations and spot where delays are likely to creep in.

There's a fifth factor worth calling out on its own, because it's the one most homeowners don't see coming: revision and resubmission cycles. If a reviewer sends your plans back with corrections, you don't just lose the time it takes to fix them. You often lose your place in the queue and wait for the next available review slot. One round of corrections can add real weeks. Two or three rounds can turn a project that should have taken a month into one that takes a season.

Why a genuinely permit-ready set is the biggest lever you control

You can't control your jurisdiction's staffing or their current backlog. You also can't control whether your project needs structural engineering review. What you can control is the quality and completeness of what you submit.

A rough sketch, a plan pulled from a generic template without adaptation to your local code, or a drawing set missing key details isn't a submission, it's an invitation for correction comments. Incomplete or unclear plan sets are a top cause of extended timelines, because every round of corrections means resubmitting and waiting again. A plan set that's genuinely permit-ready, meaning it anticipates what your local reviewer needs to see and includes it correctly the first time, is the single biggest lever a homeowner has to avoid self-inflicted delay.

We've written in detail about what separates a permit-ready set from a plan that only looks finished. If you want the full breakdown, read what "permit-ready" actually means. And if you want to understand the specific mistakes that trigger rejections in the first place, see the common reasons house plans get rejected at plan check. Both tie directly back to the timeline question, because avoiding those mistakes is largely the same thing as avoiding delay.

What to ask your local building department

Since jurisdiction is the biggest variable in the entire equation, the most useful thing you can do early is call or check the website for your specific building department. Ask directly:

• What is the current average review time for a residential project like mine (be specific: addition, ADU, new construction, remodel)?
• Is there an expedited or over-the-counter review option for smaller projects, and does my project qualify?
• What outside approvals or referrals (fire, health, engineering, HOA, environmental) does my project typically require, and how long do those take?
• What are the most common reasons plans get sent back for corrections in your department, so I can make sure my set addresses them upfront?
• Is the department currently experiencing any backlog or staffing gaps that are extending review times?

Only your local building department can give you a real, current estimate. Their answer today may be different from their answer six months ago, so don't rely on secondhand timelines from other homeowners' projects, even in the same city.

How Apex approaches permit-readiness

Because timeline is so dependent on local review, we build permit-readiness into a plan set from day one instead of treating it as a final check before submission. That means drawing to the specifics of the jurisdiction the project will actually be submitted in, providing the structural, dimensional, and code-related detail a reviewer needs to sign off without asking follow-up questions, and coordinating with structural engineers or other outside approvals when a project requires them. Our Permit-Ready Drawings & As-Builts service is built around this exact goal: avoiding the most common, and most avoidable, causes of delay.

We can't control a jurisdiction's backlog and won't claim to. What we can do is make sure the part of the timeline that's actually within a homeowner's control, the completeness and clarity of the submitted plan set, isn't the reason your project sits in review longer than it needs to.

Frequently asked questions