California ADU rules · Orange County
Can I Build an ADU in Dana Point?
Yes — you can build an ADU in Dana Point. California's statewide ADU law requires every city, including Dana Point, 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
Local ruleConditional
Ministerial/by-right approval for most ADUs, but discretionary Site Development Permit required in overlay districts (e.g., fire, coastal, hillside, floodplain, nonconforming lots).
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 (>=1 or 25% of units with Site Development Permit) + up to 2 detached with Site Development Permit; no JADUs
Detached ADUs on multifamily lots limited to 2 per lot and require Site Development Permit; JADUs not allowed in multifamily.
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
CA state law1,200 sq ft
Statewide default cap for detached new-construction ADUs in the absence of a compliant local ADU ordinance. The unconditional by-right floor a city must always allow is 800 sq ft (see Guaranteed minimum size); a city with a compliant ordinance may set its own ceiling.
Max attached ADU size
CA state law50% of the primary dwelling, but ≥850 sq ft (≥1,000 sq ft for 2+ bedrooms) is always allowed
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
Local rule16 ft
Detached and accessory-attached ADUs limited to 16 ft; attached to primary dwelling may use base zone height.
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 (strict compliance required)
ADUs must comply with the front yard setback of the underlying zoning district; no local exception.
Separation from main house
Local rule10 ft
Detached ADUs must be at least 10 ft from the primary dwelling and any accessory structure.
Parking
Parking required
Local ruleUp to 1 space
1 off-street space per bedroom or per ADU, whichever is less; multiple local 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
Local ruleOnly for a JADU
Owner-occupancy required for JADUs; for ADUs, owner-occupancy not required until Jan 1, 2025, after which it will be required for either the primary or ADU.
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 ruleADU Permit (ministerial or discretionary), Building Permit, Deed Restriction
Deed restriction required for JADUs and some ADUs; discretionary permit required in overlays or for larger ADUs.
Dana Point-specific factors that can change the answer
State law sets the floor, but these local conditions often decide whether a specific parcel works.
Fire Ember Zone
Site Development Permit required for ADUs in Fire Ember Zone.
Coastal Overlay District
Coastal Development Permit and Conditional Use Permit required; must comply with Local Coastal Program.
Hillside Properties
Site Development Permit required for lots with slope ≥20%.
Historic/HPOZ
ADU must not cause substantial adverse change to historic resources.
Dana Point caps by-right detached ADUs at 800 sq ft and requires a 10 ft separation from the primary dwelling. Discretionary permits are required for ADUs in fire, coastal, hillside, and other overlay districts, and for larger or additional ADUs on multifamily lots.
Frequently asked questions
Can I build an ADU in Dana Point?
Yes. California's statewide ADU law requires Dana Point 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 Dana Point?
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 Dana Point?
Side and rear setbacks are limited to 4 ft. per base zone (strict compliance required).
Is parking required for an ADU in Dana Point?
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 Dana Point?
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 Dana Point?
Owner-occupancy: only for a jadu. ADUs under 750 sq ft are also exempt from impact fees.
Sources
- Dana Point Zoning Code §9.07.210 (ADUs), §9.07.215 (JADUs), Ord. 20-06 (8/23/21)
- §9.07.210(d)(3), (h); §9.07.215(c)(3)
- §9.07.210(f)(4); §9.07.215(d)(3)
- §9.07.210(f)(6)
- §9.07.210(f)(5)
- §9.07.210(e)(2)(G), (f)(4)(F)
- §9.07.210(f)(10)
- §9.07.210(f)(2); §9.07.215(d)(1)
- §9.07.210(h)
- Cal. Gov. Code §§ 66310–66342 (ADU Law)
- HCD 2025 Accessory Dwelling Unit Handbook
- 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 § 66317 (ministerial approval, 60-day deadline)
- 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 Dana Point'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 Dana Point Planning before relying on it.
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