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What a permit search can—and cannot—prove
A construction permit is an authorization to perform described work under the applicable building code. It is not proof that the work was completed, inspected, or approved. A permit file can remain open after work stops, contain failed inspections, or lack a final certificate. Your due-diligence question is therefore not simply “Was a permit issued?” but “Does the documented scope match the building, and was that scope finally approved for its present use?”
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The local city, county, or other construction department is the authoritative record source for that question. Jurisdictions use different portals, retention periods, terminology, and access rules. Some records are searchable online; older files may be archived, scanned on request, or available only in person. Treat the portal as an index until you have reviewed the underlying documents.
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstall- Permit history: applications, issued permits, revisions, amendments, and the work descriptions.
- Approved plan set: the drawings and specifications that inspectors were expected to follow.
- Inspection record: inspection cards, reports, results, corrections, and re-inspections.
- Final approval: final inspection sign-off, certificate of completion, or equivalent closeout.
- Occupancy record: a certificate of occupancy (CO), temporary certificate of occupancy (TCO), letter of completion, or another local document establishing lawful use.
- Outstanding matters: open applications, failed inspections, stop-work orders, unpaid fees, and unresolved violations.
Filed plans establish what the jurisdiction approved for code purposes. They do not guarantee that the house matches the purchase contract, the seller’s marketing description, or the quality you expect. The New Jersey Department of Community Affairs cautions that plans on file do not determine what a builder must provide to a buyer, and that inspectors are limited to code compliance rather than contract conformity.
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Start with the correct building department
Confirm jurisdiction before searching
Use the authority that regulates the parcel—not necessarily the municipality named in a mailing address. A property may fall under a city department, a county office, a township, or a special authority. Ask which office maintains building permits, zoning records, certificates of occupancy, and violation records for the exact parcel.
Have the street address, unit number, parcel or tax ID, and any permit numbers ready. If the seller has older plans, inspection cards, or certificates, use their document numbers to cross-check the department’s search.
Ask how far back records go
Portals often have a defined start date. Philadelphia, for example, says permit information from 2006 onward can be searched in its Atlas system and provides address-based access to permit, certificate, violation, and zoning data. Long Beach provides permit history and archival records by project address. Neither example means another jurisdiction has the same coverage; ask what is digitized and how pre-digital files are requested.
Document the department’s answer
Save search results as PDFs or screenshots showing the search date, address, permit numbers, status, and record descriptions. If staff says a record does not exist, ask for that response in writing and ask whether the absence reflects a retention limit, an unindexed archive, a different parcel number, or genuinely missing records.
Search the address, parcel, and permit numbers
- Run an exact-address search. Try the street number and name, alternate abbreviations, unit numbers, and the parcel or tax ID. A multi-unit building may have permits filed to the building rather than a particular unit.
- Review every record category. Do not stop at “building permits.” Open zoning, plumbing, electrical, mechanical, demolition, fire, sign, use, certificate, and violation records where the portal separates them.
- Match the dates to visible changes. A finished basement, rear addition, deck, converted garage, attic room, new bathroom, structural wall removal, or change from one use to another should have a plausible permit trail.
- Record status codes. “Issued,” “active,” “expired,” “closed,” “finaled,” “cancelled,” and “violation” have different implications. If the portal does not define a status, ask the department rather than infer it.
- Search older owners or project names if offered. Large additions and conversions may be filed under a contractor, project number, or prior address format.
Philadelphia’s initial inspection is specifically intended to verify that the building or space matches approved permit documents. That makes the permit description and plan set useful comparison documents, not merely evidence that an application existed.
Request the underlying permit file and approved plans
What to request
Ask for a complete copy of each material permit file, including:
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- the permit application and owner/contractor information;
- the approved drawing set, specifications, and structural details;
- approved amendments, revisions, and deferred-submittal documents;
- inspection cards, reports, correction notices, and re-inspection results;
- final inspection approval and any completion or closeout document;
- the CO, TCO, certificate of completion, letter of completion, or other occupancy record;
- related zoning approvals, variances, change-of-use approvals, and fire or utility sign-offs; and
- open violations, stop-work orders, unpaid fees, or pending applications.
Understand access limits and fees
Access to plans is often more restricted than access to a permit index. Philadelphia requires the owner or an authorized agent for copies of building plans and charges copy fees. New Jersey says the local construction department maintains plans and should make them available to an owner, mortgagee, or contract purchaser with a legitimate need, subject to copying charges. A buyer under contract may therefore need to show the purchase agreement, an authorization from the seller, identification, or a formal records request.
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When the seller must help
If the department will not release plans directly to you, ask the seller to request them or sign an authorization. Put the request in writing and make access a contingency when possible. A seller who supplies only a permit number but refuses the approved drawings has not given you enough information to compare the building with the authorization.
Compare the approved scope with the building
Make a room-by-room change inventory
Walk the property with the permit descriptions and plans in hand. Mark each material change on a copy of the plan or a written floor-by-floor list. Include work that is easy to overlook because it is inside walls or above ceilings.
- Building additions, enclosed porches, and expanded footprints.
- Finished basements, attic conversions, and habitable garage or outbuilding space.
- Bedrooms, kitchens, bathrooms, accessory dwelling units, and other new rooms.
- Removed or relocated structural walls, new beams, stairs, windows, and doors.
- Decks, balconies, retaining walls, pools, and detached structures.
- New or relocated plumbing, electrical panels, gas lines, HVAC equipment, and fixtures.
- Fire separations, sprinklers, egress windows, accessibility features, and energy upgrades.
- Any change from the approved use—for example, storage to living space or one dwelling unit to several.
Use the plans as a scope test, not a quality guarantee
Check dimensions, room labels, door and window locations, stairs, structural notes, plumbing fixtures, and the number of dwelling units. A field condition that is materially different from the approved plan can indicate an unpermitted change, an unapproved amendment, or a construction defect. Conversely, a matching plan does not mean finishes are sound or that the seller’s promised features are present; that remains a contract and inspection issue.
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Bring qualified eyes to difficult comparisons
A licensed home inspector can document visible conditions, while an architect or engineer can interpret structural and life-safety drawings. Ask the professional to identify differences, not to certify legality outside their license. If walls are concealed or access is limited, have the report state what could and could not be verified.
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Verify final inspections and legal occupancy
Permit issuance is only the beginning
Confirm that every permit reached final inspection and was signed off. A permit can authorize work that was never completed, can expire, or can remain open after failed inspections. Look for finaled or closed status and the actual inspection results, not just an “issued” label.
Understand the certificate of occupancy
A CO identifies the approved legal use of a building or space. Boston describes it as confirmation that a building or space is safe and legally approved for its intended use. New York City states that no one may legally occupy a building until the Department has issued a CO or TCO. Miami-Dade describes a CO or certificate of completion as validation that construction or renovation was completed in compliance with applicable codes after approved inspections and completion holds.
Read the occupancy description, not merely the certificate number. Verify the number of dwelling units, commercial or residential use, floor area or floors covered, and any conditions or expiration date on a TCO. A certificate for a two-family dwelling does not authorize a third unit, and a TCO is not the same as permanent final occupancy.
Check that the certificate matches the current project
New York guidance says a CO records legal use and that final work must match the submitted plans. Compare the certificate with the latest approved plan set and with what you observed. If the property has undergone later work, confirm that a new or amended occupancy document was issued when required.
Check open violations, applications, and stop-work matters
Search the department’s violation and enforcement records separately from permits. Also ask whether there are pending applications, failed inspections, stop-work orders, unpaid fees, or holds that do not appear in a basic address search.
- Open application: work may be proposed, incomplete, or awaiting corrections.
- Failed inspection: the work did not pass a required inspection; confirm the correction and re-inspection.
- Stop-work order: construction may not legally continue until the authority releases the order.
- Open violation: the owner may face correction, fines, or use restrictions after closing.
- Unpaid fee or hold: the department may refuse final approval or permit issuance until it is resolved.
New York lists no open applications and no open violations among requirements for a CO. Its Letter of Completion process likewise requires all permits to be inspected and signed off. Ask the local department what equivalent clearance means in that jurisdiction and obtain confirmation of the current status close to closing.
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Handle older buildings and missing certificates carefully
The absence of a CO is not automatically proof of illegal construction. Some jurisdictions did not require one for older buildings or use different documents for minor work. New York notes that buildings constructed before 1938 may use a Letter of No Objection when a CO was not required, while minor alterations may use a Letter of Completion.
Do not rely on the building’s age, a tax record, or a seller’s statement alone. Ask the local department for a written explanation of what occupancy document applied when the building was built and whether later work triggered a new requirement. Keep that explanation with the title and closing file.
Reconcile the records with seller disclosures and title work
Read the seller’s disclosure, listing, contract, title commitment, survey, and inspection report together. Look for discrepancies such as:
- a “finished basement” in the listing but no permit or occupancy approval;
- a bedroom count that exceeds the CO or approved plan;
- a converted garage, porch, attic, or outbuilding missing from the permit scope;
- an addition shown on a survey but absent from the permit history;
- a seller’s statement that work was “grandfathered” without a department record; or
- an open violation or expired TCO that is not addressed in the contract.
A title search can reveal recorded restrictions or liens, but it does not replace the building department’s permit and occupancy records. Likewise, a clean inspection report does not cure an unpermitted use. Coordinate the records review with your title professional and real-estate attorney before a contingency deadline passes.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What to do when work is unpermitted or the records conflict
Pause the decision that would make the problem yours
Do not waive the permit, inspection, financing, or title contingency while a material discrepancy remains unexplained. Tell the seller exactly which room, feature, permit, or occupancy statement does not match and request the department’s requirements for correction.
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- Legalization or after-the-fact permit: the owner applies for the required permit, opens walls if inspections require it, completes corrections, and obtains final sign-off.
- Amended permit or revised plans: the record is corrected when the built work differs from an approved design but can comply with code.
- Removal or restoration: an unauthorized addition or use is removed or returned to the approved configuration.
- Written credit or escrow: the contract allocates money and responsibility for defined corrective work, with release conditions tied to official approval.
- Price or term renegotiation: the buyer accepts a documented risk only after professional advice and lender approval.
- Termination under the contract: if the issue affects legal use, financing, insurance, safety, or value and cannot be resolved on acceptable terms.
Have a licensed inspector or architect compare the plans to conditions, and have a real-estate attorney or title professional interpret legal-use, disclosure, indemnity, and closing consequences. Do not assume an escrow amount equals the cost of compliance: concealed work, design fees, permit fees, code upgrades, fines, and delayed occupancy can materially change the total.
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A practical document checklist before closing
| Document or check | What to verify | Why it matters |
|---|---|---|
| Address and parcel search | Correct jurisdiction, address variants, unit, parcel ID | Prevents a false “no records” result caused by searching the wrong identifier |
| Permit history | All material building, zoning, trade, demolition, and use permits | Shows what work was authorized and whether later work is missing |
| Approved plans | Latest approved drawings, specifications, amendments | Provides the scope against which the existing building is compared |
| Inspection file | Passed finals, failed inspections, corrections, re-inspections | Distinguishes an issued permit from completed approval |
| Occupancy document | CO, TCO, certificate or letter of completion, or local equivalent | Confirms the legally approved use and any conditions |
| Violation and enforcement search | Open violations, stop-work orders, fees, and unresolved applications | Identifies obligations that may survive the sale or block lawful use |
| Physical comparison | Additions, rooms, units, structure, systems, and use match records | Finds unpermitted or unapproved changes |
| Seller and title documents | Disclosures, survey, contract promises, liens, restrictions | Reconciles public records with what you are actually buying |
How to compare two properties
If you are choosing between homes, score each property using the same evidence rather than treating a newer-looking file as safer. The relevant comparison is the completeness and usability of the record, not simply the number of permits.
| Comparison point | Questions to ask |
|---|---|
| Permit history completeness | Does the file cover the visible additions, structural work, systems, and changes of use? |
| Plan availability | Can you obtain the approved drawings and amendments, and at what cost or with what authorization? |
| Final approval | Are all permits inspected, signed off, and closed? |
| Occupancy status | Does a CO or recognized alternative describe the current use and unit count? |
| Open matters | How many violations or applications remain open, how old are they, and who must resolve them? |
| Physical match | Can an inspector or architect reconcile the plans to the existing building? |
| Access and cost | How quickly and cheaply can the department supply the needed records? |
| Legal-use certainty | Is the current residential, commercial, rental, or accessory use expressly recognized? |
Common mistakes and how to avoid them
Relying on a home inspection
An inspection addresses visible condition and selected systems. It does not establish permit status, legal occupancy, or conformity with the approved plans. Order both services when both questions matter.
Accepting a permit number as proof of completion
Request the inspection record and final sign-off. An issued permit without a final is an unresolved project, not a completed approval.
Checking only the main building permit
Trade permits, zoning approvals, use changes, demolition records, and violations may be separate. Search each category the jurisdiction provides.
Assuming “grandfathered” means every later change is legal
Existing legal use may be protected under local rules, while a later addition, unit conversion, or change of use still requires approval. Obtain the department’s written determination.
Waiting until after closing
After closing, you may inherit the cost and delay of legalization and may have less leverage to obtain seller cooperation. Complete the records review while contingencies and contract remedies are still available.
Comparing documents without inspecting the site
Plans can show an approved design, not what was built. Walk the property with a qualified professional and record inaccessible areas as unverified.
Recommended order of operations
- Identify the correct local construction authority and its record-retention rules.
- Search the address, parcel, unit, and every known permit number.
- Download or request the complete permit, inspection, violation, and occupancy files.
- Obtain seller authorization or proof of contract-purchaser status if plans are restricted.
- Build a room-by-room inventory of additions, conversions, systems, and changes of use.
- Have a licensed inspector and, where needed, an architect or engineer compare the inventory with the approved plans.
- Confirm every required final inspection, certificate, letter, or local equivalent.
- Resolve open violations, failed inspections, expired permits, and missing approvals in writing.
- Give the reconciled file to your lender, insurer, title professional, and real-estate attorney.
- Decide whether to proceed, renegotiate, escrow, require legalization, or terminate under the contract.
Key questions to ask the building department
- Is this the complete permit and occupancy history for the parcel and all units?
- Are any applications, permits, violations, stop-work orders, fees, or holds open?
- What does each status code mean, and has every permit received final inspection?
- What document establishes legal occupancy for this building and its current use?
- Are plans available to a contract purchaser, and what authorization, identification, fees, and turnaround apply?
- If no CO exists, what local document or written determination replaces it?
- Does the department’s record show any approved change in unit count, use, or floor area?
Bottom line for a buyer
Buy only after the public record, approved plans, final inspections, occupancy document, physical building, and seller’s disclosures tell the same story. A missing record may be an archive or jurisdiction issue, but an unexplained mismatch is a due-diligence problem. Resolve it with the authority and qualified professionals before closing—not after you own the building and its permits.
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