The building permit process is the sequence of approvals, inspections, and closing documents your local government requires before, during, and after construction: you confirm the work needs a permit, clear zoning and any special reviews, submit stamped plans with the right documents and fees, pass inspections at each construction milestone, and finish with a certificate of occupancy or completion. Getting this sequence right is the single most important administrative step in any project. Skipping it or botching the application leads to fines, forced demolition, and problems that follow the property for decades when you try to sell or insure it.
When a Permit Is Required
Any project that changes the structure, mechanical systems, or footprint of a building almost certainly requires a permit. Nearly every state and most local governments have adopted some version of the International Building Code for commercial properties and the International Residential Code for homes and duplexes. As of late 2025, the 2021 editions are the most widely adopted versions nationwide, though a handful of jurisdictions still enforce older editions.
Work that consistently needs a permit across jurisdictions includes new construction and additions, removing or altering load-bearing walls, roofline changes, service panel upgrades or new circuits, moving or adding supply lines, drains, or gas piping, installing or replacing furnaces and central air conditioning, attached decks and elevated structures, and water heater replacements (because of the gas, venting, or electrical connections involved).
Work That Usually Does Not Require a Permit
The model codes exempt work that doesn’t affect safety or structural performance. Under the IBC’s standard exemption list, you can generally skip the permit for painting, wallpapering, carpeting, installing cabinets and countertops, replacing existing roofing or siding with the same material, repairing fences in kind, and putting up window screens or storm windows. Small detached storage sheds for a residential property are typically exempt too, though the maximum size varies by jurisdiction. Playground equipment for a single-family home, prefabricated above-ground pools under 24 inches deep, and retaining walls under four feet tall (measured from the bottom of the footing) generally fall outside the permit requirement.
The key phrase in most exemption clauses is “replacement in kind”: you swap an existing feature for one of the same material, size, and appearance. The moment you upgrade, resize, or relocate something, you’ve likely crossed into permit territory. When in doubt, call the local building department before starting. A five-minute phone call is cheaper than a stop-work order.
Zoning Approval Comes First
Before a building department will look at your construction plans, the project typically has to clear a separate zoning review. The two approvals answer different questions. The building permit asks whether the structure is safe. The zoning review asks whether the structure is allowed on that piece of land.
Zoning regulations control how far a building must sit from property lines (setbacks), how tall structures can be, how much of the lot a building can cover, and what activities are permitted on the property. A project that meets every building code requirement can still be denied if it violates the local zoning ordinance. Most building departments will not issue a construction permit until zoning compliance is confirmed.
If your project doesn’t fit within existing zoning rules, you’ll need a variance or special exception. Variances are discretionary. The applicant typically has to prove that the property has unique physical characteristics creating a hardship, that strict application of the zoning rules is unreasonable for that lot, and that approving the variance won’t harm the surrounding neighborhood. Self-imposed hardships, like buying a lot knowing it was too small for your planned project, are routinely rejected. Variance hearings require public notice to neighboring owners and often take several weeks to schedule, so build that into your timeline.
Extra Approvals for Special Situations
Depending on where the property sits and how the building will be used, you may need approvals beyond the standard permit and zoning review. These layers catch many applicants off guard.
Flood Zones
If the property falls within a FEMA-designated Special Flood Hazard Area, a permit for floodplain development is required before construction begins. Communities in the National Flood Insurance Program must require these permits to verify that proposed construction meets floodplain management standards.1FEMA. Permit for Floodplain Development New structures in high-risk flood areas often need an elevation certificate documenting that the building’s lowest floor sits at or above the base flood elevation, sometimes both before and after construction.2FEMA (FloodSmart). Understanding Elevation Certificates Ignoring flood zone requirements risks fines and can make the property uninsurable under the NFIP.
Historic Districts
Construction in a designated historic district typically requires a certificate of appropriateness before the building department will issue a permit. A local historic preservation commission reviews the application to ensure exterior changes are compatible with the district’s architectural character, usually following the Secretary of the Interior’s Standards for Rehabilitation. Review looks at building height, window proportions, roof shape, materials, and how the project relates to surrounding structures. The process can include a public hearing, and most jurisdictions allow an appeal to the local governing body if the commission denies the application.
ADA and Energy Code for Applicable Projects
Federal law requires that all new commercial facilities and places of public accommodation be designed and constructed to be readily accessible to people with disabilities.3Office of the Law Revision Counsel. 42 USC 12183 – New Construction and Alterations in Public Accommodations and Commercial Facilities The 2010 ADA Standards for Accessible Design govern the details.4U.S. Department of Justice. ADA Standards for Accessible Design When altering an existing commercial building, changes affecting a primary function area must also make the path of travel to that area accessible, up to a cost cap of 20% of the overall alteration budget. Buildings under three stories or with less than 3,000 square feet per story are generally exempt from adding an elevator, though that exemption doesn’t apply to shopping centers, malls, or health care offices.
New residential and commercial construction also has to meet energy efficiency standards, typically based on a version of the International Energy Conservation Code.5U.S. Department of Energy. Energy Savings Analysis – 2024 IECC for Residential Buildings Your application may need energy calculations or a compliance report, and the building will need to pass a blower-door air-leakage test before final sign-off.
Documents to Include in the Application
A complete application prevents the back-and-forth that stalls most projects. Exact requirements vary, but the core documents are consistent.
- Site plan: a scaled drawing showing property boundaries, existing structures, the proposed footprint, setback distances, and utility locations. Zoning reviewers look at this first.
- Architectural drawings: floor plans, elevations, cross-sections, and construction details. Larger or more complex projects need drawings stamped by a licensed architect or engineer.
- Structural calculations: engineering demonstrating the design can handle wind, snow, seismic, and dead loads. Required for most projects beyond simple interior remodeling.
- Contractor documentation: proof of license and insurance. Owner-builders sign an affidavit instead.
- Scope of work and construction cost: a written summary and a dollar figure, which typically determines the fee.
- Parcel identification number: the tax ID linking the application to county land records.
Flood zone properties add the elevation certificate. Historic district projects add supplemental drawings showing exterior materials and design. Commercial projects may need fire protection plans, accessibility documentation, and energy code calculations. Incomplete submissions are the single most common reason applications get bounced back before review even begins.
How Fees Are Calculated
Permit fees are almost always tied to the estimated construction cost. Most jurisdictions use a sliding scale: a base fee for the first thousand dollars of project value, then an additional amount per thousand. As a rough benchmark, total permit costs (permit, plan review, technology fees) typically land between 1% and 2% of construction value for residential projects. A $50,000 kitchen remodel might generate $500 to $1,000 in permit fees; a $500,000 new home build could run several thousand.
Plan review fees are often calculated separately, commonly set at 65% to 100% of the base permit fee. Some jurisdictions charge separate fees for electrical, plumbing, and mechanical permits if those trades require independent review. Expedited review, where available, costs extra.
New construction on undeveloped land frequently triggers impact fees on top of the standard permit costs. Impact fees fund the public infrastructure (schools, parks, roads, utilities) needed to serve new development. They can add thousands of dollars to the total and are paid before the permit is issued. Not every jurisdiction charges them, but where they exist, they can significantly increase upfront cost.
Submission and Plan Review
Most building departments now accept electronic submissions through an online portal. Some still require printed plan sets delivered in person. Either way, you pay the filing and plan review fees at submission.
The plans then circulate through multiple review departments. A typical residential application might be examined by building/structural, zoning, fire, and sometimes health and environmental reviewers. Each checks the plans against their own code requirements independently. Commercial projects add reviewers for accessibility, energy code, and sometimes traffic or stormwater management.
Timelines vary enormously. Simple residential projects in smaller jurisdictions may clear review in two to four weeks. Complex commercial projects in major metro areas can take three to six months or longer, especially if the plans go through multiple correction cycles. Construction cannot legally begin until every reviewing department has approved the plans and the building department issues the permit. The permit card must be posted visibly at the job site throughout the project.
Inspections During Construction
The permit doesn’t just authorize work. It sets a schedule of mandatory inspections at critical milestones. The permit holder is responsible for calling to schedule each one, and work at the next phase cannot proceed until the current inspection passes.
A typical residential project hits these inspection points:
- Foundation and footing: after trenches are dug and forms or reinforcement are in place, before concrete is poured.
- Framing: after the structural skeleton is complete, before insulation or drywall covers it.
- Rough-in for electrical, plumbing, and mechanical: after wiring, pipes, and ductwork are installed inside the walls, while studs are still exposed.
- Insulation: after insulation is installed, before it’s covered.
- Final: after all work is complete, covering everything from finished electrical to smoke detectors.
Inspectors verify that the actual construction matches the approved plans and meets applicable codes. If something fails, the inspector notes the deficiency, the contractor corrects it, and a re-inspection is scheduled before work moves forward. The inspection record stays on the permit card, which must remain accessible on the job site at all times.
Commercial and larger residential projects often require special inspections performed by independent, qualified inspection agencies rather than the building department’s own inspectors. The IBC’s Chapter 17 mandates special inspections for categories including structural steel connections, concrete, masonry, soil conditions and fill placement, driven deep foundations, and sprayed fire-resistant materials.6International Code Council. 2021 IBC Chapter 17 – Special Inspections and Tests The project’s structural engineer typically creates a Statement of Special Inspections identifying which tests are required, and the building department won’t issue a final certificate until all special inspection reports have been submitted and accepted.
Certificates of Occupancy and Completion
Passing the final inspection doesn’t automatically mean you can move in or open for business. The building department issues one of two closing documents depending on the project.
A Certificate of Occupancy goes to new buildings intended for immediate use, such as a house you’ll live in, a restaurant that will serve customers, or a retail store. It confirms the building is safe for its intended occupancy and that all permitted work complies with the approved plans and applicable codes. You cannot legally occupy the space without one.
A Certificate of Completion goes to structures not intended for immediate occupancy, like a shell building that still needs interior tenant buildout, or to existing buildings that were renovated without changing their original use classification. The certificate confirms the permitted work is done, but it doesn’t authorize occupancy on its own. A building already operating under a prior Certificate of Occupancy that undergoes a remodel without a change in use receives a Certificate of Completion when the remodel wraps up.
If a renovation changes how a building is used, say converting an office building into a restaurant, the building department issues a new Certificate of Occupancy reflecting the new use classification.
Permit Expiration and Extensions
Building permits have built-in expiration dates to keep projects from dragging on indefinitely. Most jurisdictions void a permit if work hasn’t started within 180 days of issuance. Once construction begins, the permit also expires if work is suspended or abandoned for six months or more. These timeframes align with the model codes, though your local jurisdiction may set tighter deadlines.
If a delay is unavoidable, request an extension in writing before the current permit expires. Most building departments grant extensions in 90- or 180-day blocks, provided you can show the project is still viable and that you intend to complete it. A small administrative fee usually applies. Letting a permit lapse without requesting an extension means starting the application and fee process from scratch, and the new application will be reviewed under whatever code edition is current at that point, which may have changed since your original approval.
What Happens If You Build Without a Permit
The consequences of skipping the permit extend well beyond the initial fine.
Immediate Penalties
Building departments can issue stop-work orders the moment they discover unpermitted construction. Daily fines for continuing work after a stop-work order add up fast. Penalties for the unpermitted work itself vary widely. Some jurisdictions charge a multiple of what the permit fee would have been; others impose flat fines that escalate for repeat violations. In many places, the fine for a single unpermitted project on a home can reach several thousand dollars, and commercial properties face steeper penalties. The building department can also require you to remove or demolish completed work that wasn’t inspected, especially if it created a zoning violation or can’t be verified as code-compliant after the fact.
Retroactive Permits
Most jurisdictions allow you to apply for a retroactive or “after-the-fact” permit, but the process is more painful and expensive than doing it right the first time. You’ll typically need a licensed architect or engineer to draw plans documenting the work that was done. Inspectors will need to verify what’s behind the walls, which often means cutting open drywall so they can see the framing, wiring, and plumbing. Anything that doesn’t meet code has to be corrected before the retroactive permit is approved. On top of the standard permit fee, most jurisdictions charge a penalty surcharge for the original violation.
Real Estate and Insurance Fallout
Unpermitted work creates problems that outlast the construction. When you sell the property, most states legally require you to disclose known unpermitted work to potential buyers. That disclosure can reduce the appraised value, since appraisers may exclude unpermitted additions from their calculations entirely. A home with an unpermitted second bedroom might be valued as a one-bedroom property. Lenders may refuse to approve a mortgage for a buyer when unresolved permit issues are on record, shrinking your buyer pool to cash offers.
Insurance is equally problematic. If a loss stems from unpermitted work, such as an electrical fire in an unpermitted room addition, the insurer can deny the claim on the grounds that the work was never inspected for code compliance. Some insurers will cancel or refuse to renew a policy outright once they discover unpermitted construction during a routine inspection or claim investigation. For older homes, insurers increasingly require four-point inspections covering the roof, electrical, plumbing, and HVAC systems, and unpermitted systems flagged during those inspections can result in denied or restricted coverage.
Pulling the Permit as an Owner-Builder
Most jurisdictions allow homeowners to act as their own general contractor and pull the building permit themselves, usually by signing an owner-builder affidavit. The affidavit confirms that you understand your legal responsibilities, will comply with building codes, will schedule and attend all required inspections, and are not building the home for immediate resale. The savings can be substantial since you avoid a general contractor’s markup, but the liability you absorb is real.
As an owner-builder, you are personally responsible for every phase of the project. If a subcontractor’s work fails inspection, that’s your problem to resolve. If a supplier or subcontractor isn’t paid, they can file a mechanic’s lien against your property. If a worker is injured on your property and the subcontractor doesn’t carry workers’ compensation, you may be liable for medical costs and face a personal injury lawsuit. Your homeowner’s insurance likely won’t cover construction-related injuries.
Before going the owner-builder route, verify that every subcontractor you hire is licensed and carries their own liability and workers’ compensation coverage. Keep copies of their insurance certificates on file. The building department holds the permit holder accountable, and when that’s you, there’s no general contractor standing between you and the consequences of anything that goes wrong.