You found a home you love in Vancouver, WA. It has that extra bedroom you need. A finished basement. A big deck out back. But before you sign, there is something important you should know. Not everything you see in a house was built with permission from the city. And if the previous owner added rooms, finished spaces, or made big changes without getting a permit, that could become your problem after closing.
This is not a rare issue. Homes all across Clark County have unpermitted work hiding in plain sight. Finished basements that were never approved. Garage conversions done without inspection. Decks built without anyone checking if they are safe. And the tricky part is that you may never know about it unless you look.
What Is a Building Permit and Why Should You Care?
A building permit is an approval from the local government that says a project meets safety codes. When a homeowner wants to add a room, finish a basement, or build a deck, they are supposed to get a permit first. Then an inspector checks the work at different stages to make sure it is done right.
The permit process exists to protect you. It makes sure that the wiring will not start a fire. That the walls can hold the roof. That the bedrooms have windows you can climb out of in an emergency. Without a permit, there is no guarantee that any of those things are true.
When you buy a home with unpermitted work, you are taking on all the risk that comes with it. If something goes wrong with that addition or that finished basement, it is your responsibility to fix it, even though you did not build it.
Why the Square Footage on the Listing Might Be Wrong
Here is something that catches a lot of buyers off guard in Clark County. The square footage you see on the listing or on the tax records does not always match what the building department has on file.
The Clark County Assessor’s job is to figure out how much a property is worth so they can tax it fairly. They use aerial photos, property visits, and even real estate listings to track changes. If they notice a new addition or a finished basement, they add it to the record and adjust the property value.
But here is the important part. The Assessor does not check whether the work was permitted. They just measure what they see and add it to the tax roll. So a home that shows 2,500 square feet on the tax record may only have 1,800 square feet of legally permitted space. That other 700 square feet could be an unpermitted addition that no inspector ever checked.
This matters because your lender, your appraiser, and your insurance company may not count that unpermitted space the same way the listing does.
What Happens When You Buy a Home With Unpermitted Work
Buying a home with unpermitted work is not illegal. But it does come with real consequences that can hit your wallet and your safety.
The first problem is the appraisal. If you are getting a mortgage, the bank will send an appraiser to determine what the home is worth. Appraisers who follow Fannie Mae or FHA rules generally cannot give full value to square footage that was built without a permit. That means a home listed as a four-bedroom may only appraise as a two-bedroom if two of the rooms were added without permits. If the appraisal comes in low, you may need to renegotiate the price or come up with more cash.
The second problem is insurance. Most homeowner insurance policies in Washington State have clauses that exclude coverage for damage caused by unpermitted work. If a fire starts because of bad wiring in an unpermitted room, your claim could be denied. If an unpermitted deck collapses and someone gets hurt, you could be on the hook for medical bills with no insurance to help.
The third problem is the city itself. If code enforcement learns about unpermitted work on your property, they can require you to bring it up to code, get a retroactive permit, or even tear the work out. And you, as the current owner, are responsible for all of that, not the person who built it.
The Permit Rules Are Different in Every City
Clark County is not one big zone with one set of rules. Each city has its own building department and its own permit requirements. What is allowed in Battle Ground may not be allowed in Vancouver. Here is a quick look at how the rules differ.
In Vancouver, the rules are strict. You need a permit for most projects. Decks that are more than 18 inches off the ground need a permit. Sheds over 120 square feet need a permit. Even window replacements may need a permit if the size or style changes.
In Camas, the rules are also strict, and they care a lot about how new work looks in existing neighborhoods. They have a Design Review Manual that governs additions and new structures like ADUs.
Battle Ground allows slightly larger sheds without a permit, up to 200 square feet and under 12 feet tall. But everything else still requires city approval.
Ridgefield adds another layer of rules for properties near the Ridgefield National Wildlife Refuge or local streams. Extra environmental reviews may be required before any work can happen.
The key takeaway is this: do not assume that because a home looks finished and lived-in, it was all done with permits. Always check. A professional home inspection in Clark County can help you spot the signs.
Do Not Fall for the “It’s Grandfathered” Line
Sellers sometimes say that older work is “grandfathered in” and does not need a permit. This sounds reassuring, but in most cases it is not true.
For something to be legally grandfathered in Clark County, it must meet three conditions. It had to be legal when it was first built. It had to be used continuously without a long gap. And it cannot have been expanded or made worse since it was built.
If a previous owner converted a garage into a living space in 1990 without a permit, that work was never legal in the first place. Time does not fix that. In Washington State, unpermitted work stays unpermitted no matter how many years go by. The only way to fix it is to go through the retroactive permit process or remove the work entirely.
There is another risk for older nonconforming homes. If a major event like a fire or flood damages the structure beyond 50 to 75 percent of what it would cost to replace, the city may not allow the owner to rebuild it the same way. They would have to follow today’s building codes, which could mean a smaller home or a very different layout.
How to Check for Unpermitted Work Before You Buy
The good news is that you do not have to guess. There are steps you can take before closing to find out if the home has unpermitted work.
Start by looking up the property on the Clark County Property Information Center website. This is a free tool where you can search by address and see the permit history for any property. Compare what the permit records show to what you see in person. If the records say the home is 1,500 square feet but you are standing in a 2,200-square-foot house, something was added without a permit.
Ask the seller directly. Washington State requires sellers to fill out a Seller Disclosure Statement, called Form 17. Section 4 of that form asks whether the seller made any additions, alterations, or conversions and whether permits were obtained. If the seller says they do not know, that answer may be honest, but it also means you need to do your own homework.
Most importantly, get a thorough home inspection from someone who knows Clark County. A good inspector will look for the physical clues that point to unpermitted work. Things like rooms without egress windows, electrical panels that were modified, additions where the construction quality is noticeably different from the rest of the house, and finished spaces that lack proper insulation or moisture barriers.
What It Costs to Fix Unpermitted Work
If you discover unpermitted work on a home you want to buy, you have a few options. You can walk away. You can negotiate a lower price to account for the cost of fixing it. Or you can ask the seller to get a retroactive permit before closing.
Getting a retroactive permit is not cheap. In Clark County, the process starts with something called an Investigative Permit. This lets a county inspector come look at the work and figure out what needs to happen. From there, the inspector may require the homeowner to cut into walls so they can check the framing and wiring. A licensed engineer may need to write a report confirming the structure is safe. In some cases, the foundation needs to be dug up and checked.
Many cities in Clark County charge an investigation fee that doubles the normal permit cost. In Camas, an engineering report is always required. In Battle Ground, there are fines on top of the double fees. And the work must be brought up to current building codes, not the codes that were in place when it was originally done. That can add thousands of dollars to the total.
This is why it is so important to know about unpermitted work before you close. If you find out after the sale, all of that cost falls on you.
How a Home Inspection Can Protect You
A home inspection is not the same as a permit search. But a good inspector can spot the physical signs of work that was done without permits or done poorly. Common problems include rooms that are missing smoke detectors or egress windows, electrical work that does not match the rest of the house, additions that feel different underfoot because the floors were not built to the same standard, and basements that show signs of moisture because proper waterproofing was skipped.
At Trusted Home Inspections, we include free thermal imaging on every inspection. This is important because thermal cameras can see things that your eyes cannot. They can detect missing insulation behind walls in additions, moisture trapped inside wall cavities, and electrical connections that are running dangerously hot. These are exactly the kinds of issues that show up in unpermitted work.
We hold licenses in both Oregon (#1898) and Washington (#1856), and we inspect homes throughout Clark County, including Vancouver, Camas, Battle Ground, Ridgefield, and Washougal. With over 2,000 inspections completed and 12 years of experience as a general contractor, we know what to look for in older homes and in work that was done outside the permit process. Learn more about our Clark County inspection services.
The Bottom Line for Home Buyers
Buying a home in Vancouver, Camas, Battle Ground, or anywhere in Clark County is exciting. But do not let that excitement keep you from asking tough questions about the property. Unpermitted work is common in this area, and the consequences of missing it can be expensive and stressful.
Check the permit history. Read the seller disclosure carefully. And get a thorough inspection from someone who knows what unpermitted work looks like. Those simple steps can save you from a very costly surprise down the road.
If you are buying a home in Clark County and want an inspector who understands these local issues, schedule your inspection with Trusted Home Inspections or call us at (971) 202-1311. We are here to help you buy with confidence.