ADU Regulations in Pasadena, California
Los Angeles County · CA · Pop. 138,000
Max ADU Size
1,200
sq ft detached
Rear Setback
5 ft
Permit Timeline
60 days for ministerial review
Build Cost
$170,000 – $480,000
Zoning
Allowed ADU Types
Pasadena has more than 3,500 contributing structures in historic districts — design standards apply in these areas. Check if your property is in a Historic Preservation Overlay Zone (HPOZ) before planning.
Source: City of Pasadena — ADU Information · Pasadena Municipal Code Section 17.50.400
Dimensions
Size & Setback Requirements
Detached
1,200
sq ft max
JADU
500
sq ft max
Attached
50% of primary home, max 1,200 sq ft
Setbacks
front
Same as primary dwelling
side
5 ft (Pasadena applies a 5 ft standard in most zones)
rear
5 ft
Max height: 16 ft (detached); attached follows primary dwelling height limits
Lot coverage: ADUs are exempt from lot coverage calculations under state law; base zone limits apply to primary structure
HPOZ properties must submit a Certificate of Appropriateness application, which can add 30–90 days to the process. Designs must be compatible with historic character.
Permitting
Permit Process
Department
Pasadena Planning & Community Development — Permit Center
Review Timeline
60 days for ministerial review; HPOZ properties require Historic Preservation review (additional 30–90 days)
Permit Fees
$5,000 – $22,000
Impact Fees
Waived for ADUs 750 sq ft and under
Required Documents
- ›Building permit application
- ›Site plan (to scale, all structures, setbacks, utilities)
- ›Architectural drawings (floor plans, elevations, sections)
- ›Title 24 energy compliance
- ›Structural engineering calculations
- ›Certificate of Appropriateness application (HPOZ properties only)
Pasadena has a handy pre-application consultation service — schedule a meeting with a planner before submitting to catch issues early
Visit Pasadena Planning & Community Development — Permit Center →Infrastructure
Utilities & Requirements
Solar
Required
Parking
Not required
Separate Meter
Optional
Fire Sprinklers
See note
Pasadena Water & Power serves the city with lower rates than SCE. Electrical upgrade requirements depend on existing panel capacity.
Financials
ADU Costs in Pasadena
Typical Build Cost
$170,000 – $480,000
Cost per Sq Ft
$275 – $420
Monthly Rental
$1,800 – $4,200/mo
Property Value Added
Adds $200,000 – $420,000 to property value
Available Grants & Programs
- ★CalHFA ADU Grant Program (up to $40,000)
- ★Pasadena Community Development Block Grant (CDBG) programs for qualifying homeowners
Historic district ADUs often cost 15–25% more due to design requirements, but the premium neighborhood commands higher rents. Rose Bowl and Old Town areas are particularly high-demand rental markets.
Use the free ADU Cost Calculator →Free Service
Get Contractor Quotes in Pasadena
Connect with licensed local ADU contractors. Takes 2 minutes, no obligation.
Explore More
Nearby Cities in Los Angeles County
Pasadena Quick Facts
- Max size1,200 sq ft
- Rear setback5 ft
- Permit timeline60 days for ministerial review
- Build cost$170,000 – $480,000
- Rental income$1,800 – $4,200/mo
- Owner occupancyNot required
Official Source
City of Pasadena — ADU InformationPasadena Municipal Code Section 17.50.400
Last verified: March 14, 2026
Free Tools
Stay Updated
ADU rules change often.
Get notified when Pasadena's regulations update, plus guides on permitting and financing.