Where Can I Find My Building Permit Number?

A building permit number is usually printed on the permit itself, application paperwork, inspection notices, or a local government’s online records. The exact location and format vary by city, county, and state, and a permit number is not the same as a property tax ID or parcel number. If the paperwork is missing, the local building department can often search for the record using the project address, owner’s name, or contractor’s information.

Check the Issued Permit and Application Documents

The fastest place to find a building permit number is the issued permit. Look near the top of the first page, in a box labeled “Permit No.,” “Permit Number,” “Permit ID,” or “Application/Permit.” It may appear in a document header, barcode, or project summary rather than beside a prominent label.

Check both the permit application and the approval documents. Some agencies assign an application or case number when a request is submitted, then issue a separate permit number after approval. If a document says “application number,” “record number,” or “case number,” it may help staff locate the permit, but it is not necessarily the final permit number.

Permit numbers can include letters, numbers, dashes, or a year. For example, a jurisdiction might use a format such as “B-24-01234” or “RES-2026-1234.” These are illustrative formats, not a nationwide standard. Copy the number exactly, including any leading zeros, prefixes, and punctuation.

Look Through Inspection and Approval Records

Inspection documents are another useful source. Search for a permit number on:

• Inspection request confirmations and inspection schedules
• Inspection results, correction notices, or failed-inspection reports
• Stop-work notices or building department correspondence
• Permit renewal, extension, or revision notices
• Final inspection approvals or certificates of occupancy

The permit number may be printed in a page header or included in an email subject line. A certificate of occupancy can also help identify a completed building project, although its certificate number may be different from the original building permit number. When contacting the agency, give both numbers if they appear on your records.

Search Your Email, Paper Files, and Contractor Records

Search email accounts and cloud storage for terms such as “building permit,” “permit issued,” “inspection,” “permit number,” and the project address. Include messages from the city or county, the permit portal, the contractor, the architect, or the permit expediter. Attachments may be named by address or project type rather than by permit number.

For paper records, check closing files, renovation folders, contractor invoices, architectural plans, and documents kept with the home’s maintenance records. A contractor or design professional who applied for the permit may have the issued permit, inspection history, or portal login information. Ask for a copy of the final permit record, not just an estimate or a submitted application.

If a contractor has gone out of business, the local building department may still have the government record. A permit is generally issued and tracked by the responsible public agency, even when a private contractor handled the application.

Use the Local Government’s Permit Search

Many cities and counties provide an online permit search or public records portal. Start at the official local government website and look for “Building,” “Permits,” “Permit Search,” “Online Services,” or “Building Records.” Search engines can help locate the page, but confirm that the portal is operated by the relevant government before entering personal information or paying a fee.

Depending on the system, a search may accept:

• The property address, including a street number and street name
• The permit number or application number
• The parcel number, assessor’s parcel number, or property identification number
• The owner, applicant, or contractor name
• The project type, such as electrical, plumbing, or residential building

Try the address in more than one format. A portal may require a directional, unit number, abbreviated street type, or a street name without punctuation. For a recently assigned address or a project on a corner lot, search by parcel number or owner name as well. Older permits may be stored in a separate archive, not the current online system.

Local records systems differ. Some display the permit number in search results; others show it only after opening a record or downloading a document. A portal may list several permits for one property, such as separate building, electrical, mechanical, and plumbing permits. Match the record to the work and date in question rather than assuming the newest number covers every part of a project.

Make Sure You Are Searching the Right Agency

Building permits are handled by the authority that has jurisdiction over the property. Depending on location and project type, that may be a city, county, or another local agency. A mailing address that includes a city name does not always mean the property is within that city’s permitting jurisdiction. Some properties in unincorporated areas receive permits from the county instead.

To identify the correct office, check the property’s official local-government or assessor records, or contact the city and county building departments and ask which agency maintains permits for that address. The U.S. Census Bureau’s Building Permits Survey reports permit activity across the country, but it is a statistical program, not a national database for looking up an individual property’s permit number.

Some work is also reviewed by separate departments. For example, a building department may issue the structural permit while a fire marshal, health department, or public works office handles a related approval. Ask which permit record is needed if the request concerns a specific task, such as an addition, electrical upgrade, or sewer connection.

Ask the Building Department to Search Its Records

If an online search does not work, contact the building department’s permit counter or records office. Explain that the permit number is missing and provide the most reliable details available. Staff may be able to search by address, parcel number, owner name, contractor, permit type, or approximate issue date.

Useful information to have ready includes:

• The full property address, including unit or suite number
• The parcel or assessor’s identification number, if available
• The project description, such as a deck, roof replacement, or addition
• The approximate date the application was filed or work was completed
• The former owner’s name or contractor’s name, if relevant

For a property with multiple projects, mention which work the record should cover. For example, “the kitchen remodel permit issued around 2019” is more specific than “the permit for the house.” Staff may ask for proof of ownership or authorization before releasing certain records, depending on local rules and the type of information requested.

If records are not available online or staff cannot locate them informally, ask how to submit a public records request. The process, response time, and any copying or research fees depend on state law and local policy. The U.S. Department of Justice’s FOIA website concerns federal agencies; city and county building records are generally requested under applicable state and local public-records laws, not federal FOIA.

Know What a Building Permit Number Is—and Is Not

A building permit number identifies a particular permit record in a local system. It helps the agency connect the approved scope of work with inspections, revisions, fees, and final status. It may identify one trade or phase of work rather than every project performed at the property.

It is different from several other numbers that may appear in property paperwork:

When a form asks for a “permit number,” confirm which agency issued it and what type of work it covers. A planning approval, zoning clearance, electrical permit, and building permit can all have separate identifiers. Providing a parcel number when a form requires the issued permit number may delay processing, even though the parcel number can help the agency find the right record.

What to Do When No Permit Number Appears

A missing number does not automatically mean that the work was unpermitted. The records may use a different label, be stored under a previous address, or be filed under a contractor’s name. Older paper files may not have been fully digitized, and an online portal may show only recent records.

Ask the building department whether it can search historical records and whether the permit may be indexed under a former owner, former street address, or parcel number. For older homes, provide an approximate date range rather than one exact year. If the property has been subdivided, renumbered, or converted into units, mention that too.

If the agency finds no record, ask what its search covered and whether other departments maintain related approvals. Keep the response and any search results with the property records. Do not assume that a contractor’s statement or a real estate listing establishes that a permit was issued; the issuing agency’s record is the more reliable source.

How to Verify the Permit Record

Once a likely number is found, check that the record matches the property, project, and dates. Review the permit description, status, issue date, and inspection history. Confirm whether it is marked issued, finaled, completed, expired, or withdrawn. A permit number by itself does not prove that all required inspections passed or that the work received final approval.

For a property purchase, renovation, insurance claim, or compliance question, request the complete permit history and related final inspection or occupancy documents. Ask the local agency to explain unfamiliar status terms, since labels and procedures vary. If the records show an open permit or unresolved inspection, the building department can explain the next steps that apply locally.

Reliable starting points include the official city or county building department and its permit portal. For general information about how building codes are developed and adopted, the International Code Council provides code-related resources; however, permit records and local requirements must be confirmed with the authority having jurisdiction.