Property Surveys: When Washington Buyers Actually Need One

Most Seattle-area buyers never order a survey, and most never regret it. On a standard platted city lot with friendly fences and no plans to build, the odds favor skipping it. But “usually fine” is doing heavy lifting in that sentence — and the cases where a survey earns its fee, it earns it a hundred times over. This is the honest decision guide.

What a survey actually does

A licensed surveyor locates your parcel’s legal boundaries on the ground and maps where improvements — fences, driveways, structures — sit relative to those lines. Depending on scope, surveys range from staking corners to a full boundary-and-improvements drawing. It’s the only document in your transaction that connects the legal description to physical reality. Title insurance, notably, often excepts “matters an accurate survey would disclose” — meaning the risk a survey addresses is one your title policy may not cover.

Order one when any of these is true

• Structures hug the lines. Fences, sheds, garages, or driveways within a few feet of where the boundary plausibly runs — the classic encroachment setup.
• You plan to build. Additions, DADUs, new fences, retaining walls — setbacks are measured from legal lines, not from the hedge. Permitting will eventually force the question; better to answer it before you’ve priced the project on wrong assumptions.
• Irregular, large, or unplatted parcels. Flag lots, acreage at the city’s edges, properties described by metes and bounds rather than a tidy plat — the error potential scales with the weirdness.
• Water, slopes, or view stakes. Waterfront boundaries, steep-slope parcels where the buildable area is exactly the question, and view properties where a few feet of line decide what a neighbor can build.
• Anything in the paperwork hints at trouble. A Form 17 boundary disclosure, an odd Schedule B exception, a neighbor’s casual comment at the open house about “the fence situation.”

Skip it with a clear conscience when

The lot is a standard rectangle in a platted subdivision, improvements sit comfortably inside obvious lines, you have no construction plans, and nothing in title or disclosure raises an eyebrow. That describes a majority of city transactions — which is why the survey is optional rather than standard here.

Timing and practicalities

Surveys take time to schedule — in busy seasons, sometimes more time than your contingency window. If a survey matters to your decision, raise it with your agent when writing the offer, not after inspection week eats the calendar. Costs vary with parcel complexity and scope; get a quote rather than trusting folklore, and ask the title officer whether the result can be used to modify the policy’s survey exception — sometimes it can, which upgrades your coverage as a side effect.

The honest take

The survey decision is a bet-sizing problem: a small known cost against a rare but five-to-six-figure tail risk. On the standard city lot the tail is thin; on anything touching the list above, it’s fat. Buyers get this wrong in both directions — paying for surveys on tract lots out of generalized anxiety, and skipping them on the hillside view parcel because the fence “looks right.”

An experienced buyer’s agent makes exactly this judgment early and tells you plainly — that judgment, not door-opening, is the product. What it costs varies by agent; Manaky Homes will put Greater Seattle agents’ fees side by side, free. Waitlist here.