Willow Glen ADU permit, cost & timeline.
San José runs one of the strongest pre-approved master-plan ADU programs in CA — Willow Glen lots routinely close permits in 60 days.
Neighborhood intel
- Lot range
- 5,500–7,500 sq ft
- Zoning
- R-1-8
- Permit window
- 5–7 mo plan-check
- Permits last 12 mo
- ≈ 95
- Best-fit product
- Detached 1-BR / 2-BR; San José pre-approved master plans
- Starting price
- from $185K
№ 01 — Field notes
What we've learned from ≈ 95 permits.
- San José Master Plan ADU Program: 16 pre-approved designs, 30–60 day permit.
- Solar + battery readiness handled by master plan compliance docs.
- 2-BR detached rent: $2,800–$3,100.
№ 02 — Questions
Willow Glen ADU questions, answered.
What's the San José Master Plan ADU Program?
A city-funded library of pre-engineered, pre-approved ADU designs that bypass architectural review — permit issuance often inside 60 days.
Can I customize a master plan?
Interior finishes yes; exterior elevations and floor plan locked. We design owner-driven custom alternatives in parallel.
Permit fees?
San José ADUs pay $0 in city ADU-specific impact fees under 750 sf; $4K–$7K total above.
№ 03 — Adjacent
Neighbors & the parent city.
Building in Willow Glen? Send us the address and we'll send back lot-specific feasibility within one business day.
Begin a Willow Glen ADU →