How to Check Building Permit History Before Buying a House

Short answer: search the address (or parcel number) in the permit portal of the city or county that issues building permits, save the results, and match every remodeled feature in the listing to a finaled permit. Ask the building department about open or expired records before your inspection contingency ends.

The listing photos show a bright basement suite and a kitchen that clearly isn’t original to 1987. Your agent loves the price. Your inspector hasn’t walked the house yet. Before you fall for the quartz, ask a quieter question: what does the building department already know about this address?

Checking building permit history before buying won’t catch every handshake remodel. It will catch a surprising number of them — open permits, expired decks, electrical upgrades that never finaled, and additions that tax records somehow forgot to argue with. You can do most of it yourself in an afternoon: find the right portal, read the statuses, line the records up against the listing, and then decide whether to buy, ask for a credit, or walk.

This one is written for the buyer’s side of the table. If you own the house and are getting ready to list, see selling a house with unpermitted work instead. PermitCove is not a brokerage; confirm every rule with the city or county that covers the property.

Why buyers search permits (not just “recent updates”)

A finished basement can be a bonus room or a liability. The difference often shows up in three places:

• Safety and code path — Was the work inspected while it was open?
• Value and lending — Will the appraiser and underwriter count the space?
• Your future self — Will you inherit an open permit, a zoning problem, or a legalization bill?

Oregon’s Building Codes Division puts the zoning-vs-building distinction bluntly for homeowners: land-use laws decide if you can build something; building codes decide how. That split matters when a garage “bedroom” never cleared planning. See Oregon BCD on residential permits.

Step 1: Find the right AHJ portal

Start with the city or county that issues building permits for the situs address — not necessarily the mailing city on the listing. Search terms that usually work:

• “[City] building permit search”
• “[County] permit portal”
• “[City] Accela / EnerGov / CitizenServe / Tyler / ViewPermit”

Some places still require an in-person records request or an email to the building department. Budget a day, not five minutes, if the portal is thin.

Shortcut: our Building Permit Lookup by State lists the official permit search portals for major cities in all 50 states, plus each state's building code agency.

Chicago’s online Guide to Building Permits is one large-city example of how a department packages homeowner guidance; your market may use a different stack, but the idea is the same — public records exist so buyers and owners can see what was permitted.

Step 2: Search the exact address (and the parcel if needed)

Use the property’s legal situs address exactly as the assessor lists it. Try:

1. Street number + street name (with and without unit/apt)
2. Alternate spellings (Saint vs St, numbered streets)
3. Parcel / APN / PIN if the address search returns nothing
4. Owner name only as a last resort — noisy and easy to misread

Print or PDF the result set. Screenshots without a date and URL are weaker when you later ask for a repair credit.

How to read open, expired, issued, and final

Status labels vary. Translate them into risk language:

An open or expired permit is not automatically a deal-killer. It is a negotiation and diligence item. Closing out or renewing may be straightforward — or it may require exposing work and hiring trades. Our guide to expired or open permits covers how those get closed, and the forward process is in how to apply for a building permit. For a permit that is still open, our permit expiration calculator shows roughly when it lapses under the common 180-day rule.

Step 3: Compare the portal to the listing and the walkthrough

Make a simple two-column list.

Listing / house shows: finished basement, new bath, deck, garage conversion, kitchen with island sink, solar, ADU, panel upgrade.

Portal shows: matching building/electrical/plumbing/mechanical permits with finals — or silence.

Red-flag remodel types that deserve a hard look:

• Finished basement or attic marketed as a bedroom
• Garage conversion
• Moved kitchen or bath plumbing
• Removed walls / open-concept gut jobs
• New decks, covered porches, or ADUs
• Service panel upgrades and whole-house rewires

Cosmetic paint, flooring, and many cabinet-only kitchen updates often leave no permit trail — and that can be fine. If you’re unsure whether a scope needed a permit in the first place, start with Do I Need a Building Permit? and then ask the AHJ about this address.

Step 4: Ask the building department about unclear records

Portals truncate comments. A status of “expired” might mean the contractor vanished after rough-in, or it might mean only a final was never scheduled after everything passed. Call or email with:

• Permit number(s)
• Address
• Your role (buyer under contract / making offer)
• The specific question: remaining inspections, renewability, whether a final is on file

Staff won’t always give legal advice. They will often tell you what the computer shows and what form closes the loop.

Contingencies that actually protect you

A generic home inspection contingency helps. A sharper package helps more:

1. Inspection contingency — covers visible defects and “permit status unknown” language in the report. If the house was ever heated with oil, ask whether the tank was removed or abandoned under a permit; our oil tank removal permit guide explains the paperwork.
2. Document / records contingency or rider — seller delivers known permits, finals, and contractor contacts by a date.
3. Appraisal contingency — protects you if the “fourth bedroom” doesn’t count.
4. Financing contingency — underwriters sometimes condition on closed permits for recent major work.

Work with your agent and, when the dollar risk is real, a real estate attorney in that state. Disclosure and contingency forms are state-specific.

Buy, credit, or walk — a practical decision tree

Lean buy (or small ask) when permits for the remodeled areas are final, scopes match what you see, and the inspector’s only note is “verify with city” that you already verified.

Lean credit / escrow holdback when an open or expired permit looks fixable: renew, schedule finals, expose a limited area, or complete a known punch list with a licensed contractor.

Cap the holdback with a written scope and a deadline that fits your rate lock.

Lean walk (or a large price reset) when you see illegal dwelling units, setback-busting additions, floodplain red flags, or major work with zero paper and a seller who won’t engage. FEMA’s homeowner FAQ is blunt that building departments are local — and floodplain rules can change the cost of “just fix it.” See FEMA Frequently Asked Questions for Homeowners.

Buying in New York City: whose penalty is it?

A question buyers rarely think to ask: if the city later writes up work the seller did without a permit, who pays the penalty? New York City answers it in its own rules, and the answer is a useful example of why the paperwork around the closing matters.

The Department of Buildings charges a civil penalty for work without a permit, and it generally has to be paid before a permit is issued to legalize the space (how that penalty is calculated is in what happens if you renovate without a permit). But the rule also lets the department waive that penalty when the current owner is a “subsequent bona fide purchaser” and the previous owner did the work. To ask for the waiver, you supply a copy of the deed and a notarized affidavit stating, among other things, that you had no relationship with the prior owner and did not receive the property as a gift (1 RCNY §102-04). The request is made on the department’s L2 form (NYC DOB L2 instructions).

Two practical takeaways, even outside New York. Keep your deed and closing file where you can find them, because they may be the evidence that the work predates you. And a waived penalty does not make the work legal: you still need the permit, the inspections, and whatever corrections they turn up. Ask your own city whether it has a similar rule before you count on one.

Selling instead? What to gather before listing is in selling a house with unpermitted work.

A one-hour buyer checklist

1. Identify the correct building department for the address.
2. Run the portal search; save PDFs.
3. List remodeled features from photos and disclosures.
4. Match each feature to a closed permit — or mark a gap.
5. Email/call AHJ about open or expired records.
6. Share findings with your inspector and agent before the contingency clock dies.
7. Decide buy / credit / walk with numbers, not vibes.

Match the listing to the records

Oregon's Building Codes Division explains the split between land-use and building approvals (Oregon BCD).

Title, tax, and HOA records — useful cross-checks

Permit portals are not the only public trail. Cross-check:

• Assessor / tax records — Living area, bedroom/bath counts, and year-built notes that disagree with the listing.
• Prior listings — Old photos showing a garage where a suite now sits.
• HOA architectural approvals — Separate from city permits; some associations require both.
• Survey or GIS layers — Setbacks, flood zones, and accessory structures.

None of these replace an AHJ answer. Together they tell you where to aim your questions. If flood zone overlays appear, read FEMA’s homeowner FAQ and then call the local floodplain manager before you treat a basement finish as a simple credit item.

The short version for buyers

Permit history is one of the cheapest diligence tools in home buying. It won’t replace a good inspector, and it won’t invent records that were never filed. It will keep you from discovering an open deck permit three days before funding.

Confirm everything with the local AHJ. PermitCove explains process; we don’t issue permits or broker deals. Read our disclaimer and about pages.

FAQ: checking permit history before you buy

Buyer diligence basics. Always verify with the building department that covers the address. Not brokerage or legal advice.

Why check permits if I already hired an inspector?

Inspectors see what’s visible today. Permit portals show what the city already reviewed — or didn’t. Open, expired, or missing records are negotiation and risk items, not vibes.

What if the portal shows no records but the house looks remodeled?

That can mean cosmetic work (often fine) or unpermitted major work. Match listing features to closed building/trade permits, then ask the AHJ about gaps that matter for financing or safety.

Is an open permit an automatic deal-killer?

Not always. Many can be renewed or finaled. Illegal units, setback-busting additions, or floodplain red flags deserve a credit, holdback, or walk — with numbers, not hope.

Which address should I search?

Use the legal situs address (and parcel/APN if needed) for the city or county that issues building permits — not always the mailing city on the listing.

Who pays the penalty for a prior owner's unpermitted work in New York City?

NYC rules let the Department of Buildings waive the civil penalty for work without a permit when the current owner is a subsequent bona fide purchaser and the prior owner did the work. You still need the permit and inspections (1 RCNY §102-04).

Do cosmetic updates show up in permit records?

Often not. Paint, flooring, and many cabinet-only kitchen updates leave no permit trail, and that can be fine. Focus on structural, trade, and added-space work.

More for buyers

• Stop-work order: the first 48 hours
• After-the-fact building permits

Official sources

• Oregon BCD on residential permits
• Guide to Building Permits
• FEMA Frequently Asked Questions for Homeowners
• NYC Rules: 1 RCNY §102-04, civil penalties for work without a permit (PDF)
• NYC DOB: L2 form instructions (PDF)

Edited by Ahmed Khalifa, founder of PermitCove. Sources are linked inline; see our Editorial Policy.