ADU Regulations in Santa Barbara, California
Santa Barbara County · CA · Pop. 91,000
Max ADU Size
1,200
sq ft detached
Rear Setback
4 ft
Permit Timeline
60 days
Build Cost
$200,000 – $400,000
Zoning
Allowed ADU Types
Santa Barbara has a strong architectural review process to maintain Spanish Colonial Revival and Mediterranean design character. All ADUs visible from the public right-of-way are subject to design compatibility review. The city's Historic Landmarks Commission may review ADUs in historic districts or on properties with historic resources.
Source: City of Santa Barbara — Accessory Dwelling Units · Santa Barbara Municipal Code Title 28 (Zoning Ordinance), Section 28.87
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 per underlying zone
side
4 ft
rear
4 ft
Max height: 16 ft (detached); higher if attached and matching primary)
Lot coverage: Per underlying zone; typically 40–60% depending on R zone
Santa Barbara's Design Review Board evaluates architectural character, materials, and massing. Red-tile roofs, stucco exteriors, and arched windows are commonly required in many neighborhoods. Factor design review into project timelines.
Permitting
Permit Process
Department
City of Santa Barbara Community Development Department — Planning Division
Review Timeline
60 days
Permit Fees
$10,000 – $20,000
Impact Fees
Impact fees waived for ADUs under 750 sq ft; proportional fees apply above that threshold
Required Documents
- ›Site plan (to scale, showing lot dimensions, all structures, setbacks)
- ›Floor plans
- ›Elevations (all four sides, with material and color callouts)
- ›Title 24 energy compliance (residential)
- ›Structural drawings
- ›Design Review Board application (if design review required)
- ›Historic Landmarks Commission referral (if in historic district)
Santa Barbara's permitting is among the more involved in California due to design review requirements. Applicants should engage an architect familiar with the city's Spanish Colonial Revival standards. The 60-day ministerial review clock applies, but design review may add time prior to complete application submittal.
Visit City of Santa Barbara Community Development Department — Planning Division →Infrastructure
Utilities & Requirements
Solar
Required
Parking
Not required
Separate Meter
Optional
Fire Sprinklers
See note
Financials
ADU Costs in Santa Barbara
Typical Build Cost
$200,000 – $400,000
Cost per Sq Ft
$275 – $360
Monthly Rental
$2,200 – $3,500/mo/mo
Property Value Added
Adds $250,000 – $450,000 to property value
Available Grants & Programs
- ★CalHFA ADU Grant Program available (up to $40,000 for pre-development costs)
Santa Barbara commands some of the highest ADU rents on California's Central Coast, driven by UCSB proximity, tourism employment, and a severely constrained housing supply. Architectural design requirements add cost but also protect long-term property values. Premium lot locations near the waterfront or Riviera neighborhoods can generate top-of-range rents.
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Santa Barbara Quick Facts
- Max size1,200 sq ft
- Rear setback4 ft
- Permit timeline60 days
- Build cost$200,000 – $400,000
- Rental income$2,200 – $3,500/mo/mo
- Owner occupancyNot required
Official Source
City of Santa Barbara — Accessory Dwelling UnitsSanta Barbara Municipal Code Title 28 (Zoning Ordinance), Section 28.87
Last verified: March 14, 2026
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