Permit history + unpermitted work — what to verify before close

How to pull permit history

Most US cities + counties have online permit lookup via building department or planning department websites.

Common search terms: '[city] permit history' + '[city] building permits search' + '[parcel ID]'.

Records typically include: permit type (electrical, plumbing, structural, addition), date issued, contractor licensed, inspections passed, certificate of occupancy if applicable.

Some jurisdictions require in-person request at city hall + small fee ($5-$25).

Red flags

**No permits + obvious additions** — bonus rooms, finished basements, attached garages, additional bathrooms — all should have permits. Check assessor records (square footage history) for additions that don't match permit history.

**Self-builder permits** — homeowner pulled their own permits without licensed contractor. Often legal, often substandard work, often un-inspected.

**Failed final inspections** — permit pulled but never received Certificate of Occupancy = work either not finished or failed code inspection. Major liability transfer.

**Open permits** — work started years ago + still showing as 'open' = inspectors never came back. Could trigger code-update requirements at sale.

Insurance + lender impact

**Insurance**: most policies include 'condition' clauses. Unpermitted electrical or plumbing failures may not be covered. Insurers occasionally void claims when investigation reveals unpermitted work.

**Lender**: appraisers note unpermitted additions on appraisal reports. Lender may require permits be pulled retroactively (often at $5,000-$30,000+) before approving loan.

**Title insurance**: doesn't cover unpermitted work. Buyer takes the risk.

**HOA**: many subdivisions require HOA approval for additions. Skipping HOA = potential injunction + reversion order.

Retroactive permitting (legalization)

Many jurisdictions allow retroactive permits with: (a) inspection at current code, (b) corrections to bring to current code, (c) fees + sometimes penalties.

**Cost range**: $2,000-$5,000 simple bathroom; $15,000-$50,000 finished basement; $30,000+ illegal addition; $100k+ illegal apartment unit.

**Time**: 2-6 months typically for standard projects.

**Some work CAN'T be legalized** — e.g., setback violations, structural work that doesn't meet earthquake/wind code, ADUs in zones that don't permit them.

Negotiation lever

Use unpermitted work as a negotiation lever. Either: (a) seller pulls permits before close, (b) seller credits buyer estimated retroactive-permitting cost, (c) buyer takes property as-is at meaningful discount.

Best to discover BEFORE making offer. Walk-through with permit-history printout in hand.

What zipradar shows

Permit history is NOT in our 12-dimension federation. City building department websites are canonical (search '[city] permit history').

Pair /topic/zoning/[zip]/ for what's permitted to build + /learn/zoning-special-overlays-historic-flood-environmental/ for restriction overlays.