What to Do When You Find Someone Else's Unpermitted Work

Why this matters

You open a wall, pull a panel cover, or crawl a space and find work no one ever pulled a permit for. It happened on someone else's watch, but the moment you tie into it, sign off near it, or stay silent about it, part of the problem can become yours. This is the reference on how to read what you found, what the retroactive-permit landscape looks like, and who actually carries the exposure, so you know what you are dealing with before you decide what to do about it.

How to tell work was never permitted

You rarely get a confession, so you read the tells:

• No record on file. A quick check with the authority having jurisdiction (the AHJ, the local building department or official who enforces code) shows no permit and no final for that scope.
• Missing inspection tags. Permitted rough work usually carries a signed, dated sticker or card. A clean install with no tag anywhere is a flag.
• Vintage mismatch. New wiring, pipe, or equipment tied into an old system with no record of the upgrade means someone worked off the books.
• Non-code details a passing inspector would have caught: no accessible shutoff, wrong device in a box, missing straps or clearances, a fixture where a permit-triggering change clearly happened.

Any one tell is a maybe. Two or three together, plus no record on file, is unpermitted work.

Unpermitted is not the same as unsafe

Hold two separate axes in your head, because they drive different actions:

• Permitted vs unpermitted is a paperwork question.
• Safe vs unsafe is a physical question.

Some unpermitted work is textbook-clean and only missing the paper. Some is a fire or a flood waiting on a trigger. The danger is collapsing the two. Do not wave off a real hazard because "it has been fine for years," and do not treat a clean install as a crisis just because the paper is missing. Read the work on its own merits, then note the missing permit as its own issue.

The retroactive-permit ladder

When unpermitted work needs to be made right, jurisdictions generally offer a ladder, roughly least to most disruptive:

• As-built or after-the-fact permit. The owner applies for a permit on work already done. The AHJ reviews and inspects what it can see. Where the work is accessible and compliant, this legalizes it for a fee, often at a penalty multiple of the normal amount.
• Permit with exposure. If the work is hidden, the AHJ may require opening finishes so an inspector can verify concealed connections. Expect some demolition to make it inspectable.
• Correct then permit. Where the work fails on inspection, it gets brought up to the currently adopted code before it passes. Touching it can trip newer requirements the original never met.
• Tear out and redo. For work that cannot be verified or is unsafe, the honest path is removal and a proper permitted install.

Which rung applies depends on the AHJ and how accessible the work is. Confirm the local path before you promise the customer an outcome.

Who carries the exposure, and when it surfaces

Unpermitted work is a quiet liability that stays quiet until a trigger:

• At sale. A buyer's inspector or the closing process flags work with no permit record. It becomes a price negotiation or a deal-killer.
• At refinance or appraisal. Added square footage or systems with no permit can be disregarded or challenged.
• At an insurance claim. After a loss traced to unpermitted work, a carrier can deny the claim. This is the expensive one.
• On an enforcement complaint. A neighbor, a competitor, or a routine inspection surfaces it, and the owner gets an order to permit or remove.

The current owner carries most of this even when a prior owner did the work. Telling them is doing them a favor, even when it is unwelcome.

Your job here

You did not create it and it usually is not the current owner's fault, so drop the judgment. But you cannot unsee it, and you cannot put your name on it as compliant when it is not. Disclose plainly, photograph and note it on the order, draw a written scope boundary if you are working nearby, and refuse to certify or energize what you cannot verify. For the branch-by-branch call on tying in versus walking away, see the decision tree.

References

• International Residential Code and trade codes as adopted locally; confirm the edition with the authority having jurisdiction
• Local building department guidance on after-the-fact / as-built permits and inspection of concealed work
• State licensing board rules on certifying only verifiable, compliant work
• See related: Discovering Unpermitted Prior Work (decision tree); Who Should Pull the Permit and Why It Matters