6 Public Records to Check Before Buying a Washington Home

Before you write an offer on a Washington home, check six free public records: the parcel and assessor record, the zoning designation, the permit history, the septic and well files, the flood zone and county hazard layers, and the recorded documents that show what the map leaves out. All six are public, none of them cost anything, and together they take about 45 minutes on a property you're serious about.

A listing sheet is a marketing document. The county's records are not. I've spent 25 years in this business, and I've watched a lot of good people buy a problem they could have seen for free. So this is the session I run before I let a buyer write in Kitsap, Pierce, or Mason County.

Key Takeaways

• Everything hangs off the parcel number. Start at the county, not at Zillow. Once you have that string of digits, every other database opens.
• Zoning decides whether the property you imagined is the property you own. The shop, the second home for a parent, the ADU: check before you buy, not after.
• A permit marked "expired" is the county telling you a job was never signed off. Unpermitted work can mean bringing it to current code, and that bill lands on whoever owns it when it surfaces.
• A septic system designed for three bedrooms does not become a four-bedroom system because somebody finished a room downstairs and called it a bedroom.
• County GIS parcel lines are an administrative drawing, not a legal boundary. I've seen them off by more than 10 feet. Use the map to find questions, use a survey and title commitment to get answers.
• The best four minutes you'll spend is a phone call, not a search: ask the county planning department whether anything is open on the parcel.

The Six Records, at a Glance

No subscription, no login, no app. Work them in order, because each one sets up the next.

Record 1: The Parcel Number and the Assessor's Record

In Washington, every piece of land has a parcel number. Some counties call it a tax account number. Once you have it, every other database opens, which is why this is step one rather than step three.

Start at the county, not at a listing portal:

Type in the street address and you get the assessor's record: lot size, legal description, assessed value, sales history, and the parcel number itself. Copy that number into a note on your phone. You're going to paste it into five more places before you're done.

No street address? That happens constantly on raw land and rural listings that give only a tax parcel number. Every one of these portals will also search by parcel number or by owner name, so you aren't stuck.

Two things on that first screen worth actually reading

The legal description. If it reads "Lot 4, Block 2," you're in a platted subdivision and the boundaries were surveyed when the plat was recorded. If instead it reads like a paragraph of compass bearings and distances, that's a metes and bounds description. That usually means rural, older, and less certain edges.

The sale history. A property that has changed hands three times in six years is telling you something. I don't know what yet, and neither do you. It's just a question worth asking.

While you're there, glance at the tax history, but not for the dollar amount. You're reading the shape of it. A big jump in assessed value usually means the county caught up with an improvement, sometimes one you're about to have a permit question about. A long flatline can mean the opposite. It's a two-second read and it sets up everything else.

The parcel number is the difference between researching a listing and researching a property. The listing is what somebody else wants you to see. The parcel record is what the county knows.

Record 2: Zoning and Minimum Lot Size

Half the people I talk to who are moving here have a plan for the property. A shop. A second home for a parent. Somewhere to park the RV. An ADU they can rent out. Almost nobody checks whether the zoning allows it before they buy.

On that same parcel viewer, turn on the zoning layer. You're looking for two things: the designation (rural residential, urban low, rural protection, whatever that county calls it) and the minimum lot size that goes with it. That minimum is what tells you whether the five acres you're buying could ever be split into two, or never.

The ADU law people are about to get wrong

Washington passed House Bill 1345, which lets counties allow a detached accessory dwelling unit on rural land, up to 1,296 square feet, within 150 feet of the main house, sharing the driveway and the water supply. It was signed in March 2026 and took effect in June.

Here's the part that matters: it is opt-in by county. As of this writing I could not confirm that Kitsap, Pierce, or Mason had adopted it.

So do not buy rural acreage because a video or an article told you that you can put a second house on it. Call the county planning department and ask directly. That's a ten-minute phone call and it is the only answer that counts.

Zoning isn't a detail you sort out after closing. It's the difference between the property you imagine and the property you own. It cuts the other way too: sellers sometimes don't know what they're sitting on, which is how people get taken by a buyer or investor who did the homework they skipped.

Record 3: Permit History

Zoning tells you what's allowed going forward. Permits tell you what already happened, and whether anybody asked permission.

That finished basement, the converted garage, the deck off the back. Somebody built those. All three counties have a permit search, usually under the Department of Community Development, and you search it with the parcel number you already copied.

You're looking for permit records that match what you saw in the house. Four bedrooms in the listing, a three-bedroom septic permit on file, and no permit for an addition? That isn't a technicality. That's a conversation.

Learn to read the status column

I'd treat an expired permit on a major system (roof, electrical, structural) as a real question rather than a shrug. Ask for the invoices, ask who did the work, and put it in front of your inspector before the inspection, not after, so they know where to look.

Why this is expensive rather than annoying

Unpermitted work can mean the county requires it brought to current code: opened up, inspected, corrected. That bill lands on whoever owns the house when it surfaces. It can complicate your financing. It can complicate your insurance. And it will absolutely come up again when you go to sell, because the next buyer's broker is going to do exactly what you're doing right now.

One caveat. If you find no permits at all on a house built in the last 40 years, that isn't proof of anything. Small counties digitized at different times, and older paper records sometimes never made it online. It means call the county, not assume the worst.

You're not looking for a reason to walk away. You're looking for the thing you'd want to have known before you agreed to a price.

Record 4: Septic and Well Files

If you're coming from a city, you may never have thought about where your water comes from or where your waste goes. When I moved out to Port Orchard I didn't know what a septic system was. Out here, on a lot of properties, both are yours. You own them, you maintain them, you replace them.

Septic records don't live with the assessor. They live with the health district:

Search the parcel or address and look for three things: the as-built drawing showing where the system actually is, the design capacity in bedrooms, and the date of the last inspection or pumping.

The bedroom number is the one to sit with

A septic system designed for three bedrooms does not become a four-bedroom system because somebody finished a room downstairs and called it a bedroom. That mismatch is one of the most common and most expensive things I find.

For wells, Washington's Department of Ecology keeps a well log database where you can pull the original driller's report: depth, the date it was drilled, and the yield in gallons per minute at the time. A well that produced well in 1974 is information, not a promise. Test it during your inspection period regardless.

None of this is me telling you to be afraid of rural property. I love rural property, and some of the best buys in these three counties are on well and septic. I'm telling you to know what you're taking on, because a septic replacement is a five-figure conversation now and it should happen before you're emotionally committed, not after.

Water in, waste out. Two systems, two public records, about six minutes.

Record 5: Flood Zone and County Hazard Layers

If you only had ten minutes, I'd spend them here. We're in a part of the country with water on three sides, hills made of glacial till, and a subduction zone offshore. All of that is mapped. All of it is free. Almost nobody looks.

Start with FEMA's Flood Map Service Center. Put in the address and you'll get the flood zone designation. Zone X is outside the mapped high-risk area. Zone A or AE is the special flood hazard area, and that's where a federally backed lender will require flood insurance. That requirement isn't a suggestion, and it changes your monthly payment.

Then go back to the county parcel viewer and start turning on layers. This is the part nobody shows you:

• Landslide hazard
• Liquefaction, where soil behaves like a liquid in an earthquake
• Steep slope
• Critical areas and wetlands, which can restrict where you're allowed to build or add on
• Tsunami inundation, if you're on the water

Washington's Geological Survey released updated statewide tsunami modeling in August 2026. If you looked at an older map, you looked at the wrong one.

Two live changes worth knowing in 2026

Mason County removed its own floodway overlay on the Skokomish in June 2026 and now relies on FEMA's mapping there. That changes what you can rebuild or improve in that corridor.

And starting with residential leases signed after December 31, 2026, Washington landlords must disclose flood risk in writing under Senate Bill 6237. Think about what that tells you. The state decided this information was important enough to require a disclosure for renters. You're about to spend several hundred thousand dollars.

A flood zone doesn't have to be a no. It's a number: get an insurance quote, get an elevation certificate, and sometimes it's a very good negotiating position. What it can't be is a surprise you discover after closing.

Record 6: The One That Tells You the Map Has Limits

Everything above, you can trust. This last one you can't, and that's the entire point.

There's a comment under every property research video ever made, four words long: GIS equals get it surveyed. The people saying it are right, and I'd rather be the one who tells you why than let you find out.

County GIS parcel lines are an administrative drawing. They exist so the county can assess and tax land. They are not a legal boundary and they are definitely not a survey. I have seen them off by more than ten feet.

Here's how people actually find out. They close, they move in, they pull up the county map, they see where the line appears to run, and they build a fence on it. Then the neighbor has it surveyed and the real pin is twelve feet the other way. Now there's a fence in somebody else's yard, a bill to move it, and a relationship with the person next door that started with a property dispute, all over a map that never claimed to be accurate to the foot.

The county isn't hiding this. Most of these portals print a disclaimer right on the page saying exactly that: for reference only, not a survey. Nobody reads it.

So here's the rule: use the map to find questions, use a survey and a title commitment to get answers.

The thing the map almost never shows you

Easements. A utility easement, a shared driveway, a neighbor's legal right to cross your land to reach theirs. Those live in the recorded documents inside the title commitment your escrow company produces once you're under contract.

The map shows you a clean rectangle. The title report shows you who else has rights inside it. That one is genuinely its own article.

The 45-Minute Version

If you're serious about a property, work it in this order:

1. Pull the parcel record and save the parcel number. Read the legal description and sale history.
2. Turn on the zoning layer. Note the designation and minimum lot size. If your plan needs an ADU, a split, or a shop, call the planning department.
3. Search permits by parcel number. Match what's on file against what you saw in the house, and read the status column.
4. Pull the septic and well records from the health district and Ecology. Check the bedroom capacity against the listing.
5. Run FEMA, then the county hazard layers. Flood, landslide, liquefaction, steep slope, critical areas, tsunami.
6. Treat every line on every map as a question, not an answer. Survey and title commitment are where answers come from.

Every free record here exists to tell you what to ask about. None of them is the final word. The buyers who get hurt are the ones who treated a map as proof. The ones who do well here show up to the inspection period already knowing where to look.

The Four-Minute Phone Call That Beats All Six

This is the single best-value call you'll make before you write an offer. Call the county planning department and ask one question: is there anything open on this parcel?

One open permit. One open code case. One open violation.

They'll tell you. It takes four minutes, it costs nothing, and it is not in any database you can search from your couch.

How Accurate Are County GIS Parcel Maps?

Accurate enough for location and context, and not at all for boundaries. The layers will reliably tell you what's near what and which hazard areas touch a parcel. They will not tell you where your property line sits to the foot, and I've seen them off by more than ten feet. For anything involving a fence, a structure, a setback, or a dispute, you need a survey and the title commitment.

Does This Research Process Work Outside Washington?

The workflow does. Every county in the country has an assessor and most have a public GIS portal, so the sequence of parcel number, zoning, permits, utilities, hazards, then title holds up anywhere. What changes is the hazard layers. This checklist is built around what actually threatens property in the Puget Sound region: flood, landslide, liquefaction, and tsunami. A county in Texas or Ohio is mapping something completely different.

Isn't Checking Public Records My Agent's Job?

Your broker's job is to know these records exist, know what they mean for your offer, and refer you to the right person when a question needs an expert. We're not septic designers, surveyors, or land use attorneys, and a broker who tells you otherwise is doing you no favors. Run the free checks yourself so you arrive at the conversation knowing what to ask, and so that when I tell you something is a problem, you already know why.

How Long Does Researching a Property's Records Take?

About 45 minutes for all six on a property you're serious about, plus a four-minute phone call to the county. The parcel record takes five minutes, zoning around ten, permits about ten, septic and well roughly six, and the flood and hazard layers another ten. That's for a property you're ready to write on, not every listing you scroll past.

Final Thoughts

Parcel number. Zoning. Permits. Septic and well. Flood and hazard layers. And the one that reminds you the map has limits.

Six records, all free, about 45 minutes. Don't fall in love with a property that was never going to work, and don't discover any of this after closing, when every one of these questions becomes expensive instead of free.

This article is for informational purposes only and is not legal, financial, or tax advice. Statutes and county rules cited are current as of October 2026, and county adoption of state law varies. Always confirm with the county department involved and consult the appropriate licensed professional about your specific situation.

Buying in Kitsap, Pierce, or Mason this year?

I'll run these six records on any parcel you're serious about, before you write. Book a 30-minute call and bring the address.

Would rather call? Reach me at (360) 777-7212. Still looking? Browse current listings or start with Find Your Town.