That sunroom, finished bonus room or new deck might be the best thing you ever did to your house. But if it was built without a permit, it can quietly cost you thousands the day you sell.
After more than 20 years selling homes in Indian Land, Fort Mill and the Charlotte area, I've watched unpermitted work stall closings, shrink appraisals and send buyers walking. The good news: it's almost always avoidable if you pull the permit up front.
What a permit really is
A building permit is your local building department's sign-off that the work meets code. An inspector checks it at key stages, so problems get caught before the walls are closed up.
Requirements vary by town and county, but these projects usually need one:
• Room additions, sunrooms and screened porches
• Finishing a bonus room, attic or basement
• Converting a garage into living space
• Decks, especially raised ones
• Electrical work like new circuits or a panel upgrade
• Plumbing changes, including adding a bathroom
• Replacing an HVAC system or water heater
• Moving or removing walls
Not sure? Call your county building department before you start. In our area that's usually Lancaster County, York County, or the city or county you live in on the North Carolina side. A five-minute call can save you a big headache later.
Why it matters when you sell. Unpermitted work shows up where it hurts most: the appraisal. If your buyer is financing, an appraiser will inspect your home, and lenders expect that report to be accurate.
Your square footage may not count. Fannie Mae requires appraisers to comment on additions built without a permit and to back up any value they give them with comparable sales. If nearby sales don't show buyers paying for similar unpermitted space, that room may add little or nothing to your value.
It's more visible than ever. Starting November 2, 2026, every new conventional appraisal must use the redesigned appraisal report. Notes about your home's improvements now sit right in that section, where underwriters can't miss them.
Your closing can stall. If the work raises a safety concern, the appraisal can come back "subject to" repairs and a reinspection before the loan closes. That means delays, extra costs and nervous buyers.
Buyers get leverage. Once unpermitted work is on the table, buyers often ask for a lower price, repairs or credits. Some simply walk away.
Safety and insurance come first. Permits aren't just paperwork. Inspections exist because bad wiring, poor framing and improper venting can cause fires, leaks and structural problems you won't see until it's too late.
Unpermitted work can also complicate an insurance claim if damage is traced back to it. And a buyer's home inspector is trained to spot work that doesn't look right, so it tends to come out eventually.
Already done the work without a permit?
You're not alone, and it's usually fixable. The key is dealing with it before you list, not in the middle of a contract.
Gather what you have: contractor names, receipts, dates and photos.
Call your building department and ask about a retroactive permit.
Expect an inspector may need to see inside walls or ceilings, and budget for any corrections.
Talk with your agent about pricing. If permitting isn't practical, we can position the space.
Honestly so the appraisal doesn't come in short.
Disclose it. Being upfront protects you and keeps the deal together.
The bottom line
A permit costs a little time and money now. Skipping one can cost you square footage, a smooth
closing and real dollars later.
Planning a project or thinking about selling a home with past work?
Call The Snipes Team at 803-547-7653 or visit TheSnipesTeam.com. We'll help you know where you stand before it shows up in an appraisal.
