Why Hiring the Right Surveyor in King County Matters
King County is one of the highest-demand survey markets in Washington. Rapid residential development in Redmond, Kirkland, and Renton, waterfront properties along Puget Sound and Lake Washington, and dense urban infill projects in Seattle all keep licensed Professional Land Surveyors (PLS) busy year-round. That demand means turnaround times can stretch and prices vary widely. Knowing how to vet and hire a surveyor correctly saves time and money.
Step 1 - Verify the License
Every land surveyor practicing in Washington must hold an active PLS license issued by the Washington State Department of Licensing. Before signing any contract, Use the directory as a starting point, then confirm the responsible surveyor's current license before hiring. Confirm the license is active, covers land surveying (not just engineering), and has no disciplinary notations. Washington RCW 18.43 makes it illegal for anyone without a PLS license to perform and certify boundary survey work. Unlicensed survey work has no legal standing and can create title problems that cost far more to correct than the original survey would have.
Step 2 - Gather Your Parcel Information
Before calling any firm, find your King County parcel number The Assessor site shows your parcel number, lot dimensions from the recorded plat, and any easements on record.
Having this information ready makes every conversation with a surveyor more productive. Firms can look up your plat records and prior survey history before quoting, which leads to more accurate estimates.
Step 3 - Understand What You Need
Survey work in King County commonly falls into several categories:
- Boundary survey: Establishes legal property lines. Required for fence permits, setback confirmation, lot line adjustments, and neighbor disputes.
- Topographic survey: Maps elevation and physical features. Required for site grading, drainage plans, and new construction design.
- ALTA/NSPS survey: A high-standard survey required by commercial lenders for property transactions. More thorough and more expensive than a standard boundary survey.
- Elevation certificate: Documents the elevation of a structure relative to the FEMA Base Flood Elevation. Required in flood zones along King County's river corridors and waterfront areas.
- Subdivision survey: Divides one parcel into two or more new parcels. Must comply with King County land division regulations and be recorded with the county.
Telling surveyors exactly what type of work you need, and why, helps them quote accurately and tells you whether their specialization matches your project.
Step 4 - Get Written Quotes from Three Firms
Call or email at least three licensed King County survey firms. Give each one identical information: your parcel number, the lot's approximate size and location, the type of survey you need, and any deadline you are working with. Ask each firm the following questions:
- Have you worked in this immediate area recently?
- Are there prior survey monuments likely to be in place on my parcel?
- What is included in this quote, and what would trigger additional charges?
- What is your current turnaround time?
- Will you be the supervising PLS on this project?
A surveyor who has recently worked in your neighborhood may already have established reference control points and prior monument data, which can reduce field time and cost.
What to Watch Out For
Low Bids That Exclude Key Deliverables
Some firms quote a low base price but charge separately for monument setting, filing fees with King County, or stamped copies of the plat. Ask every firm what the quote includes and what is billed as an extra. The lowest quote is not always the best value.
Turnaround Time Promises
King County surveyors are busy, particularly from April through September. If a firm promises a two-week turnaround when every other firm is quoting six weeks, ask how they can deliver that. Rushed work is more likely to miss problems.
Unlicensed Alternatives
Some property owners attempt to use county GIS data, old plat maps, or hired non-professionals to locate property lines. None of these substitutes for a licensed survey. King County GIS data carries an explicit disclaimer against using it for legal boundary determination. Only a Washington PLS can produce a legally defensible survey.
Working with Puget Sound and River Corridor Properties
Properties along Puget Sound, Lake Washington, the Green River corridor in Auburn and Kent, or the Cedar River valley in Renton involve additional complexity. Shoreline Management Act setbacks, wetland buffers, and FEMA flood zone requirements may all affect what a surveyor needs to document. Ask surveyors specifically whether they have experience with shoreline or flood zone properties before hiring for these projects.
King County Assessor and Recording Resources
The King County Assessor is your first stop for parcel information. The King County Recorder handles filed surveys and plat records. Your hired PLS will typically handle the filing process when a Record of Survey is required under Washington RCW 58.09, but it is useful to know where those records live if you want to review prior work on your parcel.
Find a Licensed Surveyor Near You
Our directory lists licensed Washington Professional Land Surveyors serving Seattle, Bellevue, Redmond, Renton, Kirkland, Shoreline, Kent, Federal Way, and the broader King County area. Search King County surveyors to compare firms and request quotes for your project.