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A plat alteration allows revisions to a legally recorded plat or short plat, including creation of new building lots provided everything is consistent with applicable zoning, conditions of preliminary plat approval, recorded covenants, and other binding regulations. Administered by DPER. See the legal authority Chapter 19A of the King County Code

See the current fee schedule for an estimate.

How do I apply for a plat alteration?

Refer to Pre-application meetings for land use permits information under pre-applications

What is the timeline for processing a plat alteration?

Decision type 3: 120 days.

For more information, see subdivisions or call customer service at 206-296-6600.