Planning commission sets precedent: requires on‑the‑ground verification of lot corners before approving contested lot‑joiners

King County planners and commissioners spent more than an hour on Oct. 9 debating survey methods and statutory requirements for lot‑joiners after a plat submitted by surveyor Mike Stewart relied on record maps rather than field monument verification. The commission ultimately recommended conditional approval, requiring that measurements be "physically verified on the ground or the corner markers be located and/or set" before the county records the amended plat.

Shannon, the planning staff member, told the commission the submission had been the subject of multiple reviews, that the county had consulted the state ombudsman and that staff was not comfortable endorsing the plat absent physical verification. The county land‑use surveyor (Tom) explained the statutory choices for certifying amended plats: either (A) complete a new survey on the ground or (B) reference a recorded survey map and also certify that monuments shown on the plat have been placed or located. Tom said he would not personally sign a certificate stating he had verified monument locations if he had not been on the ground, because he could not defend that decision in court.

Multiple commissioners, outside surveyors and the planning director parsed the statute’s small‑roman numerals and the hierarchy surveyors use to retrace subdivision corners. Commissioners cited concerns that older subdivision plats (from the 1960s–1980s) were created before satellite‑based surveys and that monument locations can drift or be lost; others argued re‑surveying is standard practice and that allowing plat certifications without physical verification would worsen lot‑line inconsistencies.

The applicant’s survey approach and the county engineer’s interpretation of state law diverged; the state ombudsman had earlier advised the planning authority to present the question to the land‑use body. After extended discussion the commission voted to recommend approval to the county commission on the condition that the surveyor verify corner locations on the ground or set monuments as needed. Commissioners framed the motion as an interpretation of state code by this land‑use authority and noted staff would notify the state ombudsman and the legislature’s drafting process about the body’s decision.

The motion was made, seconded and carried. Commissioners instructed staff to communicate the commission’s interpretation to the state ombudsman and to include the condition in the recommendation to the county commission.