Unpermitted work is one of the most common title and disclosure headaches in residential real estate. Here's what it means, why it happens, and what to do if you have some.
Unpermitted work is work done on a home without the required building permits — and without the inspections that confirm the work meets local code. It is common. It is legal to own a home with unpermitted work. And it will absolutely come up when you try to sell.
How unpermitted work happens
Sometimes it's deliberate: a homeowner wants to avoid the cost and delay of the permit process. Sometimes it's ignorance: many people don't know that converting a garage, finishing a basement, or adding a deck requires a permit in most jurisdictions. Sometimes it's a contractor who didn't pull the permit they should have.
The result is the same: work that exists on the property but doesn't exist in the county's records. The county doesn't know the square footage is different from what the tax records say. The permit history shows nothing for a project that a buyer can see with their eyes.
Why it matters at sale time
Buyers and their agents increasingly run permit history checks as part of due diligence. An unpermitted addition triggers several problems simultaneously: the buyer's lender may not lend against unapproved square footage, the buyer's insurance may not cover it, and the buyer has legitimate grounds to renegotiate price or walk.
In most states, sellers are required to disclose known material defects. Unpermitted work you're aware of is a material defect. Non-disclosure is a liability.
What to do if you have unpermitted work
You have options, and none of them require panicking:
- Retroactive permits: many jurisdictions allow you to apply for a permit after the fact. An inspector will assess the work, you may need to open walls to demonstrate compliance, and if it passes you get a clean record.
- As-is disclosure: disclose the unpermitted work and price accordingly. Buyers in competitive markets sometimes accept it; buyers in softer markets may walk.
- Demolition: if the work is genuinely non-compliant and the retroactive path is too costly, returning the space to its prior condition is sometimes the cleanest option.
For work you haven't done yet
If you're about to hire a contractor for structural work, an addition, a deck, a basement finish, a new electrical panel, or any HVAC work — ask upfront whether a permit is required and confirm the contractor will pull it. Permits protect you, not just the municipality. A permitted, inspected project is defensible at sale time. An unpermitted one is not.
The permit fee and the delay are real costs. The liability of skipping them is larger.
Permits and your basis
A permitted improvement is also a documented improvement — the county record provides an independent verification of when the work was done and what it involved. That documentation supports your basis claim far more credibly than a contractor invoice alone. The paper trail works in both directions.
