Can I Get a PE Stamp for My Existing Home Plans in Washington?

Washington requires the sealing engineer to be in responsible charge of the engineering — the engineer must have exercised engineering judgment over the design. For existing plans, this means independent verification: the engineer recalculates structural elements, checks code compliance under the applicable Washington-adopted codes, and revises the drawings as needed before sealing. The seal must show the engineer's name, Washington license number, and date. Washington engineers cannot seal work outside their area of competence. Seattle, Bellevue, Tacoma, and the other cities review the sealed package against their local amendments.

The review starts with the full drawing set: architectural, structural, foundation, and any prior calculations. The engineer checks the design against the design loads, verifies the geotechnical report's recommendations were implemented — important on Puget Sound slopes — and recalculates beams, columns, foundations, and the lateral system. Energy code compliance is re-verified against the current WSEC. Deficiencies get redlined; the drawings are revised until the engineer can take professional responsibility. Bring the geotechnical report, the design criteria, and any prior plan-check comments. Incomplete documentation is the biggest delay.

Use this checklist before engaging an engineer for existing plans: • Engineer of record holds an active Washington PE license, verifiable on the state roster • Plans are complete: architectural, structural, foundation, and prior calculations • Geotechnical report available and its recommendations addressed in the design • Energy code compliance re-verified against the current WSEC • Prior plan-check comments included so corrections aren't repeated • Engineer confirms they'll respond to plan-check corrections on sealed sheets • Scope agreement covers review, revision, sealing, and corrections • Seal shows name, Washington license number, and date on every sealed sheet