Bellevue homeowners invest heavily in their properties — and a well-designed home addition is among the highest-return improvements in this market. Piper Cole Architects designs home additions throughout Bellevue, from West Bellevue waterfront to Somerset and Eastgate.
Popular Addition Types in Bellevue
- Second Story Additions: Adding upper floors to Bellevue’s prevalent one-story ranch homes — especially in Somerset, Crossroads, and Lake Hills neighborhoods
- Primary Suite Additions: Main floor primary suites for aging-in-place or buyer-preference upgrades
- Kitchen Additions: Opening and expanding kitchens in Bellevue’s 1960s-1980s housing stock
- ADU Additions: Attached ADUs for rental income or multi-generational living
Bellevue Home Addition Costs (2026)
- Second story addition: $380,000-$620,000
- Primary suite addition: $165,000-$290,000
- Kitchen addition: $115,000-$210,000
- Architect fees: $18,000-$55,000
Bellevue Permit Process for Additions
City of Bellevue Development Services review: 4-8 weeks for standard residential additions. Bellevue has predictable timelines and well-organized permit staff. We have completed numerous Bellevue additions and know the code interpretations specific to this jurisdiction.