California ADU rules · Santa Barbara County
Can I Build an ADU in Solvang?
Yes — you can build an ADU in Solvang. California's statewide ADU law requires every city, including Solvang, to approve a qualifying accessory dwelling unit by right, plus a junior ADU (JADU) on a single-family lot. What varies city to city are the local specifics below.
Can you build one?
ADUs allowed
CA state lawYes — by right
ADUs and JADUs are allowed by right in all residential and mixed-use zones; ministerial approval, no hearing.
Units on a single-family lot
CA state law1 ADU + 1 JADU
At least one ADU and one JADU per single-family lot (a conversion ADU may also be possible).
Units on a multifamily lot
Local ruleconversions (up to 25% of units, min 1) + up to 8 detached (existing multifamily) or up to 2 detached (proposed multifamily), not to exceed number of existing units
Detached ADUs: up to 8 per lot for existing multifamily, up to 2 for proposed multifamily; total detached not to exceed number of existing units.
Junior ADU (JADU)
CA state lawAllowed
Up to 500 sq ft, within the walls of an existing single-family home (single-family lots only).
Size & height
Max detached ADU size
Local rule1,200 sq ft
Local cap is 1,200 sq ft or less than primary dwelling, whichever is less.
Max attached ADU size
Local rule1,200 sq ft or less than primary dwelling, whichever is less
Local cap is 1,200 sq ft or less than primary dwelling, whichever is less.
Guaranteed minimum size
CA state law800 sq ft
An 800 sq ft ADU must be allowed regardless of FAR/lot-coverage caps; a city also cannot cap an attached ADU below 850 sq ft (1,000 for 2+ bedrooms).
Max JADU size
CA state law500 sq ft
Max height
CA state law16 ft
16 ft baseline; cities must allow 18 ft within ½ mi of a major transit stop or where the primary dwelling is two-story, and 20 ft on a lot with a multistory multifamily building.
Setbacks
Side setback
CA state law4 ft
A city cannot require more than 4 ft side or rear setback; conversions of existing structures are exempt.
Rear setback
CA state law4 ft
Front setback
Local ruleper base zone for accessory structures; no explicit minimum for ADUs
Front setback for ADUs defaults to accessory structure rules of base zone.
Separation from main house
Local ruleNone required
No explicit separation required for ADUs.
Parking
Parking required
Local ruleUp to 1 space
Max 1 space per unit or bedroom (whichever is less); state exemptions apply.
Transit parking exemption
CA state lawYes — no parking required near transit & for conversions
No parking may be required within ½ mi walking distance of transit, in a historic district, for an ADU within an existing structure, within one block of car-share, or in certain permit-parking areas.
Garage-conversion replacement parking
CA state lawNot required
When a garage/carport is demolished or converted to build an ADU, replacement parking cannot be required.
Approval, timeline & cost
Approval path
CA state lawMinisterial (by right)
No public hearing or discretionary design review for a qualifying ADU.
Approval timeline
CA state law60 days
The agency must act within 60 days of a complete application — and the ADU is deemed approved if it does not.
Owner-occupancy
CA state lawOnly for a JADU
No owner-occupancy requirement for ADUs (the prior sunset was removed). A JADU may require owner-occupancy, principally where it shares sanitation with the main house.
Impact-fee waiver
CA state lawWaived under 750 sq ft
An ADU of 750 sq ft or less pays no impact fees (the 750 sq ft threshold itself is exempt under § 66311.5); larger ADUs pay fees proportional to the primary dwelling. JADUs (≤ 500 sq ft) are exempt.
Permits required
Local ruleZoning clearance, Building permit
Ministerial zoning clearance required in addition to building permit.
Solvang-specific factors that can change the answer
State law sets the floor, but these local conditions often decide whether a specific parcel works.
Historic Resource Impact
Waivers may be denied if ADU/JADU would adversely impact a property listed in the California Register of Historical Resources.
Fire Access/Sprinklers
Sprinklers not required unless primary dwelling requires them; must comply with Title 10 access requirements.
Solvang caps both attached and detached ADUs at 1,200 sq ft or less than the primary dwelling, and allows up to 8 detached ADUs on existing multifamily lots. Height limits vary by ADU type and proximity to transit. Historic resource protections may restrict ADUs on listed properties.
Frequently asked questions
Can I build an ADU in Solvang?
Yes. California's statewide ADU law requires Solvang to approve a qualifying accessory dwelling unit ministerial (by right), plus a junior ADU (JADU) on a single-family lot.
How big can an ADU be in Solvang?
A detached ADU of at least 1,200 sq ft must be allowed, and an ADU of 800 sq ft can never be zoned out by floor-area or lot-coverage limits. A JADU can be up to 500 sq ft.
What are the setback requirements for an ADU in Solvang?
Side and rear setbacks are limited to 4 ft. per base zone for accessory structures; no explicit minimum for ADUs.
Is parking required for an ADU in Solvang?
Up to 1 space. No parking can be required within ½ mile of transit, for conversions, or for units inside the primary home. When a garage is converted, replacement parking is not required.
How long does ADU approval take in Solvang?
A complete application must be acted on within 60 days, with ministerial (by right) — no public hearing or discretionary design review for a qualifying ADU.
Do I have to live on the property to build an ADU in Solvang?
Owner-occupancy: only for a jadu. ADUs under 750 sq ft are also exempt from impact fees.
Sources
- SMC § 11-12-2 (Ord. 24-0378, adopted 12/9/2024)
- SMC § 11-12-2(F)
- SMC § 11-12-2(D)
- SMC § 11-12-2(K)(1)
- SMC § 11-12-2 (no separation standard found)
- SMC § 11-12-2(K)(7), § 11-12-2(L)(6)
- SMC § 11-12-2(C), § 11-12-2(I)
- SMC § 11-12-2(K)(6)
- SMC § 11-12-2(K)(4)
- Cal. Gov. Code §§ 66310–66342 (ADU Law)
- HCD 2025 Accessory Dwelling Unit Handbook
- Cal. Gov. Code § 66317 (ministerial approval, 60-day deadline)
- Cal. Gov. Code § 66323 (by-right ADU/JADU, 800 sq ft, 4-ft setbacks)
- Cal. Gov. Code § 66333 (junior ADUs)
- Cal. Gov. Code § 66321 (size minimums & height)
- Cal. Gov. Code § 66322 (ADU parking; § 66334 covers JADU parking)
- Cal. Gov. Code § 66314 (local ordinance standards)
- Cal. Gov. Code § 66315 (owner-occupancy)
- Cal. Gov. Code § 66311.5 (impact fees: none for an ADU ≤ 750 sq ft or JADU ≤ 500 sq ft)
Last updated 2026-06-25. This is an AI-assisted summary of Solvang's ADU rules, drawn from its published ordinance and California ADU law — general information, not legal advice, and it may be incomplete or out of date. Verify the controlling rule for your specific parcel with Solvang Planning before relying on it.
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