Old Pasadena ADU permit, cost & timeline.
Old Pasadena landmark districts ask for craft — our ADUs read as a small original outbuilding, not an add-on.
Neighborhood intel
- Lot range
- 5,000–7,500 sq ft
- Zoning
- R-1 + Landmark Districts
- Permit window
- 7–10 mo (Design Commission)
- Permits last 12 mo
- ≈ 25
- Best-fit product
- Architect-led detached unit echoing Craftsman / Spanish Colonial parent
- Starting price
- from $225K
№ 01 — Field notes
What we've learned from ≈ 25 permits.
- Design Commission review on most landmark-district lots — add 6–10 wks.
- Pasadena ADU impact fees among the lowest in LA county ($4K–$6K).
- Mature trees often dictate setback dance — arborist letter helps.
№ 02 — Questions
Old Pasadena ADU questions, answered.
Will the Design Commission approve a modern detached ADU?
Yes, when massing and rooflines defer to the primary residence. Pasadena prefers compatible-not-identical contemporary work.
How does Pasadena compare on permit cost?
Cheaper than LA city — Pasadena impact fees run $4K–$6K vs LADBS $9K–$12K.
Tree-protection ordinance?
Yes — protected species (oak, sycamore, deodar) within drip-line require an arborist report and Director's approval.
№ 03 — Adjacent
Neighbors & the parent city.
Building in Old Pasadena? Send us the address and we'll send back lot-specific feasibility within one business day.
Begin a Old Pasadena ADU →