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June 1, 2026
Architect in Issaquah, WA Home Additions and ADU Design
Issaquah, WA sits at the gateway to the Cascade Mountains and offers some of the most dramatic residential settings in the Seattle area. From Issaquah Highlands’ planned community to older neighborhoods closer to downtown, Piper Cole Architects serves the full range of Issaquah residential projects.
Issaquah Architecture Services
Home Additions
Second stories, primary suites, and great room additions on Issaquah’s typical larger lots
ADU Design
DADUs and attached ADUs under City of Issaquah codes
Custom Home Design
New construction across Issaquah’s varied terrain
Renovation
Updating older homes in established Issaquah neighborhoods
Issaquah Highlands HOA Considerations
Issaquah Highlands has a Design Review Board that reviews all exterior changes and additions for compliance with community design standards. Materials, colors, massing, and roof forms are all subject to review. Piper Cole Architects is familiar with the Issaquah Highlands design guidelines and can design to meet those standards from the start.
Issaquah Permit Process
City of Issaquah permit review: typically 4-8 weeks for standard residential projects. Faster than Seattle. Issaquah is in King County with access to Eastside utility infrastructure.
Free consultation — call 425-753-6452
Authoritative sources
Regulatory requirements referenced in this guide are set by the official agencies below. Rules change — always confirm current requirements with the source:
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