Building Permit

Building permits apply to both residential and commercial properties, with approximately 1.43 million issued in the U.S. in 2025. For business owners, they are a critical component of local compliance, particularly when opening a new location, expanding an existing space, or making structural modifications to a leased or owned property.

How a building permit works

The permit process begins with an application submitted to the local building authority, typically a city or county department. The applicant provides detailed plans, including architectural drawings, project specifications, and the intended use of the space. The department reviews these materials to verify compliance with local building codes and zoning requirements before issuing approval.

Once the permit is issued, construction may begin. Inspections are typically required at key stages of the project, such as after framing, electrical rough-in, or plumbing installation, to confirm that the work meets code requirements. A final inspection is conducted upon project completion, and a certificate of occupancy may be issued before the space can be legally used or occupied.

The timeline for permit approval varies by jurisdiction and project complexity. Simple permits may be issued within days; larger commercial projects can take weeks or months. Some states have legislated specific deadlines, such as California's requirement for review within 30 to 60 business days, depending on project size.

Why a building permit matters

Operating without a required building permit exposes property owners and business operators to significant legal and financial risk. Local authorities can issue stop-work orders, impose fines of up to $15,000 per violation in New York City, or require that unpermitted work be demolished and redone at the owner's expense. In California, the Contractors State License Board can impose civil penalty assessments of up to $5,000 per violation and suspend or revoke a contractor's license.

Unpermitted construction can also complicate property sales, insurance claims, and financing, as carriers can deny coverage or cancel policies entirely for work performed without required permits. Lenders and buyers routinely conduct due diligence that surfaces unpermitted work, which can delay or derail a transaction.

For businesses, a building permit is often a prerequisite for obtaining a certificate of occupancy, the document that legally authorizes use of a space for a specific purpose. Without it, a business cannot legally open to the public.

Common uses and examples of building permits

Building permits are required across a wide range of construction and renovation activities. Common scenarios include:

• New construction. A business owner constructing a new retail storefront or warehouse must obtain a building permit before breaking ground.
• Interior renovations. A restaurant operator who reconfigures a kitchen layout, adds a partition wall, or installs a commercial hood system typically needs a permit.
• Tenant improvements. A commercial tenant building out a leased office space, adding conference rooms, upgrading electrical systems, or installing HVAC generally requires permits before work begins.
• Additions and expansions. A property owner adding square footage to an existing structure, such as extending a warehouse or adding a second floor, must secure a permit.
• Demolition. Tearing down a structure or a significant portion of it typically requires a separate demolition permit.

Minor cosmetic work, such as painting, flooring replacement, or cabinet installation, often does not require a permit, though requirements vary by jurisdiction.

Key characteristics of a building permit

Building permits are jurisdiction-specific. Requirements, fees, and timelines differ significantly across cities, counties, and states—for instance, King County, Washington, increased most permit-related fees by 49% effective January 2025. A project that requires a permit in one municipality may not require one in another.

Permits are tied to the specific project described in the application. Deviating substantially from approved plans, changing the scope of work, materials, or structural elements, typically requires a permit amendment or a new permit.

Most permits have an expiration date. If construction does not begin within a specified period, or if work is suspended for an extended time, the permit may lapse and require renewal.

Permit records are generally public documents. Local building departments maintain records of issued permits, inspections, and code violations, which are accessible to prospective buyers, lenders, and insurers.

Building permit vs. zoning permit

A building permit and a zoning permit are distinct authorizations that serve different purposes. A zoning permit confirms that a proposed use of land or a structure is allowed under local zoning laws, for example, that a commercial business can legally operate in a particular zone. A building permit, by contrast, governs the physical construction or modification of a structure and ensures it meets safety and code standards.

In many jurisdictions, zoning approval must be obtained before a building permit is issued. Both may be required for the same project.

Considerations and best practices

Verify permit requirements early. Before signing a lease, purchasing property, or contracting with a builder, confirm which permits are required for the intended project. Requirements are set at the local level, are not uniform across jurisdictions, and evolve as states adopt updated building codes.

Work with licensed contractors. Many jurisdictions require that permit applications be filed by or in conjunction with a licensed contractor. Using unlicensed workers on permitted projects can void the permit and create liability.

Keep permit documentation. Retain copies of all issued permits, inspection reports, and certificates of occupancy. These records are important for insurance purposes, future property transactions, and demonstrating regulatory compliance.

Understand that a building permit is one of several local permits a business may need. Depending on the nature of the business and the work being performed, a fire department permit, a health permit, or a sign permit may also be required.

Related terms and next steps

Building permits are one category within the broader landscape of local business compliance. Understanding which permits and licenses apply to a specific business and location is essential to operating legally. Related terms and concepts include:

• Business permit. A general term for government authorizations required to conduct business activities, of which a building permit is one type.
• Zoning permit. Confirms that a land use or structure is compliant with local zoning regulations; often a prerequisite to a building permit.
• Business license. A broader authorization to operate a business within a jurisdiction, separate from construction-specific permits.
• Home occupation permit. Required in many jurisdictions when operating a business from a residential property; may trigger building permit requirements if physical modifications are made.

Identifying all required local permits, including building permits, before beginning construction or opening a business location helps avoid fines, delays, and compliance gaps. LegalZoom's business license report service can help identify the federal, state, and local permits applicable to a specific business and location.

FAQs about building permits

How much does a building permit typically cost?

Permit fees vary by jurisdiction and are generally calculated based on the project's scope, type, or square footage, with residential and commercial minimums commonly ranging from $200 to $250 and scaling upward from there. The most common approach bases permit fees on a percentage of total construction value, often ranging from 1% to 2%, though methods vary by jurisdiction. Some municipalities charge a flat fee for minor work, while others apply a per-square-foot rate or a percentage of the project's estimated construction value, with commercial projects typically ranging from 1–5% of the total construction value plus mandatory plan review fees.

What happens if construction deviates from the approved plans after a permit is issued?

Substantially changing the scope of work, materials, or structural elements after a permit is issued typically requires a permit amendment or an entirely new permit before the modified work can proceed. Proceeding without updating the permit exposes the property owner to the same stop-work orders, fines, and demolition requirements that apply to unpermitted construction—and retroactive permits often carry double or triple the original permit cost.

Can a tenant apply for a building permit, or does the property owner have to apply?

In most jurisdictions, a commercial tenant can apply for a building permit for work within their leased space, though the application typically requires the property owner's consent and may need to be filed in conjunction with a licensed contractor. Lease agreements often address permit responsibilities directly, so tenants should review their lease terms before initiating any permitted work.

How long is a building permit valid before it expires?

Most permits expire if construction does not begin within a specified period after issuance, commonly six months to one year, or if work is suspended for an extended time, with many jurisdictions setting that threshold at 180 days of inactivity. In Tennessee, for example, a building permit expires two years from the date of issuance or upon issuance of a certificate of occupancy, whichever occurs first, unless an inspector determines that substantial progress has been made.

Is a building permit required for work done on a leased space before a business opens?

Tenant improvement work, such as adding partition walls, upgrading electrical systems, or reconfiguring plumbing, generally requires a building permit regardless of whether the space is leased or owned. Because a certificate of occupancy is typically required before a business can legally open to the public, securing the necessary permits before tenant improvements begin is a prerequisite to opening, not an optional step.

Are building permit records publicly accessible, and who typically looks them up?

Permit records are generally public documents maintained by local building departments, and they are routinely reviewed by prospective buyers, lenders, and insurers during due diligence on a property. Unpermitted work that surfaces during this process can delay or derail a property sale, complicate financing, or result in denied insurance claims, which is why retaining copies of all issued permits and inspection records matters well beyond the construction phase itself.