Permit Office (AHJ)
Seattle Department of Construction and Inspections (SDCI)
King County · Washington
MEP, structural, civil, and energy-compliance engineering for Seattle projects — permitted through Seattle Department of Construction and Inspections (SDCI) and designed to the city's adopted codes and amendments.
Coordinated mechanical, electrical, and plumbing design — engineered as one system, stamped by licensed professionals, and documented for fast permit approval.
Structural systems designed to the loads your state actually imposes — gravity, seismic, wind, and snow — with drawings built to get approved the first time.
Site engineering that clears local review — grading, drainage, and utilities designed to each jurisdiction's published standards from day one.
Energy compliance handled as engineering, not paperwork — documentation matched to the exact code edition your permitting jurisdiction enforces.
Seattle maintains its own Building, Residential, Mechanical, and Energy Codes with amendments on top of the state codes, and enforces the Building Emissions Performance Standard (BEPS) plus the Energy Benchmarking and Building Tune-Ups ordinances for existing buildings. The Seattle Energy Code is one of the most aggressive in the country, so design to the city edition — not the plain Washington State Energy Code.
Seattle's construction market is shaped by major technology-sector office and campus development, dense high-rise and mid-rise multifamily, healthcare and life-science lab space, and institutional work. The city's aggressive decarbonization policy — the Building Emissions Performance Standard and one of the strictest energy codes in the nation — is a defining constraint, steering new and existing buildings toward electrification and deep envelope performance.
Reviewed 2026-09-11. Code editions and local requirements can change; confirm the current requirements with the authority having jurisdiction before design.
SDCI runs plan review through its online Seattle Services Portal, with most commercial permits submitted and tracked electronically. The city uses intake screening and, for larger projects, a preliminary/pre-submittal conference process, and offers different review tracks depending on project size and complexity. SDCI publishes review timelines, and its energy code review is notably rigorous given Seattle's stringent local energy code.
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