Can I sell a house in Washington that has unpermitted work?

What counts as unpermitted work

Most of it is ordinary. A garage turned into a bedroom or a family room. A basement finished with a bedroom and a bathroom. A deck added off the kitchen, a wall taken out to open up the living room, a second kitchen downstairs, a detached shop wired for heat. The work may be perfectly solid. It just never went through the city or county, so nobody on the government side ever inspected it.

Plenty of owners find out only when they decide to sell. A previous owner did the work, a contractor said a permit wasn’t needed, or a parent finished the basement decades ago and never mentioned paperwork. What matters now is what you know, what the public record shows, and how the space will read to the people a buyer brings in.

How to look up your permit history in Pierce and King County

Start by working out who issues permits for your address. That depends on whether the house sits inside a city or on unincorporated county land, and the mailing address won’t always tell you. Houses in unincorporated Fairwood, for example, carry Renton addresses.

• Unincorporated Pierce County (Spanaway, Graham, Frederickson, South Hill, the Key Peninsula): Pierce County Planning and Public Works, which has an online permit search.
• Tacoma: the City of Tacoma’s online permit portal.
• Puyallup, Lakewood, University Place, Sumner, Bonney Lake and the other Pierce County cities: that city’s own building or permit department.
• Unincorporated King County (White Center, Skyway, Fairwood): King County’s Permitting Division.
• Seattle: the Seattle Department of Construction and Inspections, known as SDCI.
• Kent, Auburn, Federal Way, Renton and the other King County cities: that city’s own building or permit department.

Search by address and by parcel number, which appears on your property tax statement and on the county assessor’s website. Older permits, especially from before records went digital, may not show up online at all, and a records request to the permit office can turn up paper files. While you’re on the assessor’s page, compare its square footage and bedroom count with the house as it stands today. A converted garage that the assessor still lists as a garage is a clue worth following up.

What Form 17 asks about permits

Form 17, Washington’s seller disclosure statement for residential property, asks whether there have been any conversions, additions, or remodeling. If the answer is yes, it asks whether all building permits were obtained and whether all final inspections were obtained.

The choices are yes, no, and don’t know. “Don’t know” is an honest answer when you truly don’t know, for instance when you bought the house with the conversion already in place and nobody could tell you its history. It stops being honest once you’ve searched the records and found nothing. Answer from what you actually know, and add a short written explanation where a bare checkbox would mislead.

The article on Form 17 and selling as-is covers the disclosure rules in more depth, including what changes when a buyer waives the form. If your situation is tangled, a real estate attorney should review the wording before you sign it.

How it surfaces with inspectors, appraisers, and lenders

A buyer’s inspector spots converted space quickly. In a garage conversion the signs are familiar: carpet laid straight over the slab, a step up to the door into the house, baseboard heat with no ducts, a framed-in wall where the garage door used to be, and a seam in the drywall where old meets new. The inspector writes up what they see, often with a recommendation to check the permit history. Expect questions about the door between the old garage and the house, too, since that wall was built to separate a garage from living space.

The appraiser comes next. Appraisers look at how space was built and how it’s recorded, and area that was never permitted, or that doesn’t meet the usual standards for living space, may be valued differently from the rest of the house or reported separately. A garage conversion can also cost the house its garage in the appraiser’s comparison, which matters in neighborhoods where every nearby sale has one.

Then the lender. Plenty of loans close on houses with unpermitted work, but a lender can require repairs for safety issues, and government-backed loans such as FHA and VA tend to be stricter. A basement bedroom without an egress window, missing smoke alarms, or exposed wiring in a converted room are the kinds of items that hold up a financed sale. Requirements vary by loan program and by lender, and the buyer’s loan officer is the one who can answer for a specific loan.

Permit it, remove it, or price it in

Permit it

Most permit offices will take an application for work that’s already done. The office decides what it needs to see, and that can mean opening walls so an inspector can check framing and wiring, then bringing parts of the work up to current code. Cost and time are hard to predict until the permit office, or a contractor who handles after-the-fact permits, has looked at it. This path makes the most sense when the space adds real value, like a legitimate bedroom, and the work is likely close to code already.

Remove it

Sometimes the simplest fix is returning the space to what it was permitted as. The garage becomes a garage again, and the basement kitchen loses its range. Removal can need a permit of its own, so ask first.

Price it in

Disclose it clearly, describe the space accurately in the listing (a bonus room rather than a bedroom, if it doesn’t qualify as one), and set the price with the unpermitted area in mind. This works best when the listing is candid about the space from the first photo, because a buyer who learns about it during inspection tends to renegotiate harder than one who knew from the start.

The List It page covers preparation and pricing in general. With unpermitted work the order matters: pull the permit history before you choose a path, and choose the path before anyone sets a price.

Why investor buyers see it differently

An investor reads unpermitted work as a line item. They’re planning to renovate anyway, and they’re usually paying cash, so no lender is asking about egress windows. Some have been through the local permit office before. They will budget to legalize the space or remove it, or simply value the house as though it weren’t there.

That makes a cash offer worth seeing when the problem is large, like a full basement unit with a kitchen and no permits, or a conversion with obvious safety questions. Any offer will reflect the work, and it may still come in below what the listing path would net after legalizing. What it removes is the chance that a financed buyer’s lender balks weeks into escrow. Owners of older rural houses in Pierce County meet a similar trade with septic systems, covered in selling a house on septic in Pierce County, where the paperwork decides almost as much as the condition does.