To apply for a building permit, gather your project plans and supporting documents, submit the package with the required fees to your local building department, work through plan review by answering any correction comments, and then schedule inspections at each stage of construction until the project passes a final sign-off. The details differ from city to city, but the sequence is broadly the same across the country because most jurisdictions adopt some version of the same model codes.
Confirm the Work Actually Needs a Permit
Before you spend time on an application, make sure your project requires one. The general rule: if the work changes the structure, layout, or major systems of a building, you almost certainly need a permit. That covers new construction, additions, load-bearing wall changes, substantial rewiring, new plumbing runs, HVAC installations, decks above a certain height, pools, larger fences, demolition, reroofing beyond a like-for-like replacement, and converting a space to a different use such as turning a garage into a bedroom.
Some minor work is exempt. The International Residential Code, which most jurisdictions adopt in some form, commonly exempts painting and other cosmetic work, cabinet and countertop swaps, one-story detached sheds under 200 square feet, freestanding decks not exceeding 200 square feet and sitting 30 inches or less above grade, fences under 7 feet, retaining walls 4 feet or shorter, sidewalks and driveways on grade, and minor repairs like replacing a faucet or a light fixture. Exempt work still has to meet code; the exemption just spares you the paperwork. If your city has stricter local amendments, those control. When you aren’t sure, call the building department before starting. A five-minute phone call can save months of trouble.
Documents and Information to Gather
The International Building Code requires every permit application to include a written description of the proposed work, the property’s legal description or street address, the intended use of the structure, the estimated project value, and construction documents showing the work in detail. Most departments post a standard form on their website that walks you through these items.
Construction Documents and Plans
Plan requirements scale with the project. A water heater replacement might only need a one-page application. A new home needs a full set of architectural, structural, electrical, plumbing, and mechanical drawings. Under the IBC, construction documents must be dimensioned, drawn clearly enough to show the location and nature of all proposed work, and demonstrate compliance with applicable codes.
A site plan is required for most projects involving new construction. It has to show property boundaries, the size and location of new and existing structures, distances from lot lines, street grades, and proposed finished grades. In flood-prone areas the site plan also needs to identify flood hazard zones and design flood elevations. Building officials can waive the site plan for minor alterations and repairs where it would serve no purpose.
Many jurisdictions require a licensed architect or engineer to prepare and stamp the plans, especially for structural work, commercial projects, and larger residential additions. Check your local rules before hiring a drafter who is not licensed. Unsigned plans are one of the most common reasons applications get kicked back at the front counter.
Supporting Paperwork
Along with the plans, expect to provide proof of property ownership, your contractor’s license number and insurance information, energy code compliance calculations (often a Title 24 or IECC report, depending on your area), and any zoning variance approvals. If the property sits in a historic district, a floodplain, or an area governed by a homeowners’ association with architectural review, you may need additional sign-offs before the building department will even accept your application.
Decide Who Pulls the Permit
In most jurisdictions, either the property owner or a licensed contractor can apply. When you hire a contractor, they typically handle the whole permit process. The permit is issued in their name, and they carry professional liability for code compliance, workers’ compensation for their crew, and responsibility for scheduling inspections.
Pulling the permit yourself as an “owner-builder” shifts all of that onto you. You are the party of record, you are responsible for making sure the work meets code, and you have to manage inspections. If you hire workers who are not licensed contractors, you may count as their employer under state and federal law, with obligations for payroll taxes, workers’ compensation insurance, and unemployment contributions. Your homeowner’s insurance may not cover injuries to unlicensed workers on your property. Owner-builder liability can also follow you after a sale, particularly if construction defects show up later. Most building departments will ask you to sign an acknowledgment that you understand these risks before issuing the permit.
Submit the Application and Pay the Fees
Once your documents are assembled, submit the complete package to your local building department. Many jurisdictions now accept applications through online portals, which can speed up intake and let you track status electronically. In-person submission is available nearly everywhere, and some departments accept mailed applications for simpler projects.
Permit fees are usually due at submission or when the permit is issued, depending on local practice. Calculation methods vary. Some jurisdictions charge a flat fee based on the type of work, others use a sliding scale tied to estimated construction cost, and many combine a base fee with a percentage-of-value calculation. Minor projects like a water heater swap or a small deck often land in the low hundreds of dollars. Larger residential remodels and additions commonly run from several hundred to a few thousand. New home construction runs higher once plan review fees, utility connection fees, and impact fees are added in.
After the department accepts your application and payment, you will get a confirmation number or receipt. Keep it. You will need it to check status, respond to reviewer comments, and eventually pick up the approved permit.
Plan Review and Corrections
Plan review is where your application spends most of its time. Multiple reviewers examine the documents for compliance with building, fire, zoning, electrical, plumbing, and mechanical codes. Simple residential projects can clear review in a few days to a couple of weeks. Larger residential remodels typically take two to four weeks. Commercial and industrial projects can take one to six months, and large developments requiring zoning changes, environmental review, or public hearings can stretch to a year.
Expect the reviewers to return your plans with correction comments. That is not a rejection. You or your design professional address each comment, revise the drawings, and resubmit. Each correction should be clearly marked on the plans with a date and the designer’s initials so the reviewer can find changes quickly. Most departments allow two or three review cycles before requiring a meeting to resolve outstanding issues.
Respond promptly. Many departments will archive your application if you do not respond within a set period, often 120 to 180 days, and you will have to start over with a new application and new fees. If the application is denied outright, the denial must include written reasons identifying which code provisions the project violates. You can usually revise and resubmit, or appeal to a local board of appeals if you believe the denial was incorrect.
After the Permit Is Issued
When every reviewer signs off, the department issues the permit. Before construction starts:
- Post the approved permit at the construction site where it is visible from the street or public right-of-way throughout the project.
- Keep a set of the stamped, approved construction documents at the project location for inspectors to reference.
- Know which inspections are required and at what stages you need to call for them before covering up work.
Construction has to follow the approved plans. If you want to change something mid-project, submit a revision or amendment to the permit. Minor field adjustments may be handled informally with the inspector, but anything affecting structure, safety systems, or the building footprint requires a formal plan revision.
Inspections During Construction
Inspections are how the permit system enforces the code. At each critical stage, you or your contractor call the building department to schedule an inspection before the work gets covered by the next phase. The inspector verifies the work matches the approved plans and meets code.
The typical sequence for new residential construction goes:
- Foundation, after footings are excavated and reinforcement is placed but before concrete is poured. On slab-on-grade foundations, a plumbing rough-in inspection usually happens at the same time.
- Framing, after the structure is framed (bearing walls, ceiling joists, rafters, roof bracing, windows, exterior doors, anchor bolts) but before insulation and drywall.
- Rough-in for electrical, plumbing, and HVAC, while wiring, piping, and ductwork are still visible. These often run concurrently with or just after framing.
- Insulation, after rough-in inspections pass but before drywall.
- Final, once everything is complete and the building is ready for occupancy. Each trade gets its own final sign-off, and then a building final confirms the whole project.
If an inspection fails, the inspector notes the specific deficiencies. You correct them and call for a re-inspection. Some departments charge a re-inspection fee, especially after multiple failures. One rule holds across every jurisdiction: never cover up work before the inspector signs off. Burying unapproved wiring behind drywall is a reliable way to earn a stop-work order and an expensive tearout.
Final Inspection and Certificate of Occupancy
The final inspection is the last step. Once the inspector confirms the completed project matches the approved plans and meets code, the permit is closed out. For new buildings, major additions, changes in occupancy type, and commercial spaces, the building department issues a certificate of occupancy certifying that the structure is safe and legal to use for its intended purpose.
Occupying a building that requires a certificate of occupancy before one is issued is illegal in most jurisdictions. Lenders, insurers, and future buyers will want to see this document, so do not treat it as optional. For smaller renovation projects that do not change the building’s use, a final inspection sign-off without a formal certificate of occupancy is typical.
Keep the Permit From Expiring
Building permits do not last forever. Most are valid for about six months from the date of issuance if no work has started. Once construction begins, the permit typically stays active for one to two years, though this varies by jurisdiction. If no inspection activity happens for an extended period, the permit can expire even if the project is not finished.
Working with an expired permit carries the same risks as working without one. If yours lapses before the project is done, you may be able to renew it or request an extension, often for a fee of roughly half the original permit cost. If the permit has been lapsed for more than a year, some departments require an entirely new application and new fees. If codes have changed during the lapse, your project may need to meet the updated requirements, which can force expensive redesign work. The easiest way to avoid this is to maintain steady inspection progress. Even when construction slows, scheduling the next required inspection keeps the permit clock from running out.
Why It Is Worth Doing Right
Building without a permit exposes you to real financial risk. Inspectors patrol neighborhoods and spot active work; an unpermitted project can trigger an immediate stop-work order, daily fines, and in some jurisdictions penalties several times the original permit fee. If the work does not meet code, the municipality can require full removal rather than a fix in place. Retroactive permitting typically costs double or triple the standard rate, requires “as-built” plans prepared by a professional, and may involve opening walls or ceilings to verify concealed work. Homeowner’s insurance policies commonly exclude coverage for faulty construction, and some contain explicit exclusions for damage arising from unpermitted modifications. When you sell, most states require you to disclose known unpermitted work; buyers may walk away or demand a price cut, lenders may balk, and appraisers may exclude unpermitted square footage from the home’s value entirely.
If you have already completed unpermitted work, contact your building department about retroactive permitting sooner rather than later. The longer it sits, the more complicated and expensive it becomes to legalize.