California ADU rules · San Luis Obispo County
Can I Build an ADU in Pismo Beach?
Yes — you can build an ADU in Pismo Beach. California's statewide ADU law requires every city, including Pismo Beach, 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 (<=25% of units) + up to 2 detached
Limits detached ADUs on multifamily lots to 2, not 8 as in state baseline.
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 rule1,000 sq ft
Detached ADUs capped at 850 sq ft (studio/1-bed) or 1,000 sq ft (2-bed), or 50% of primary, whichever is less; state floor of 800 sq ft still applies.
Max attached ADU size
Local rule850 (studio/1-bed), 1,000 (2-bed), or 50% of primary, whichever is less
Same rule as detached; state floor of 800 sq ft still applies.
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
ADUs subject to zoning district height, but not less than 16 ft unless otherwise required by the Local Coastal Plan.
Setbacks
Side setback
Local rule4 ft
4 ft or zoning district standard if less.
Rear setback
Local rule4 ft
4 ft or zoning district standard if less.
Front setback
Local ruleper base zone (must comply with front and street side setbacks for the zoning district)
No special ADU carve-out for front setback; must comply with base zone.
Separation from main house
CA state lawNone required
No statewide separation requirement between the ADU and the primary dwelling.
Parking
Parking required
Local ruleUp to 1 space
1 space per ADU outside Coastal Zone, with state exemptions.
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
Local code recites an owner-occupancy requirement, but California Gov. Code § 66315 bars owner-occupancy requirements for ADUs — enforceable for JADUs only. Verify the JADU covenant with the city.
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 or coastal development permit, Building permit
Coastal Development Permit required in Coastal Zone; zoning clearance elsewhere.
Pismo Beach-specific factors that can change the answer
State law sets the floor, but these local conditions often decide whether a specific parcel works.
Coastal Zone
Coastal Development Permit required for ADUs/JADUs in the Coastal Zone; public hearing waived unless part of a larger project or variance.
Hillside Slope >20%
ADUs and JADUs are prohibited on slopes greater than 20%.
Historic District
No parking required for ADUs in historic districts.
Fire Sprinklers
Sprinklers not required for ADUs/JADUs unless required for the primary dwelling.
Pismo Beach limits detached ADUs to 1,000 sq ft (2-bed) or 850 sq ft (studio/1-bed), and allows only 2 detached ADUs on multifamily lots. ADUs/JADUs are prohibited on slopes over 20% and require a Coastal Development Permit in the Coastal Zone.
Frequently asked questions
Can I build an ADU in Pismo Beach?
Yes. California's statewide ADU law requires Pismo Beach 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 Pismo Beach?
A detached ADU of at least 1,000 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 Pismo Beach?
Side and rear setbacks are limited to 4 ft. per base zone (must comply with front and street side setbacks for the zoning district).
Is parking required for an ADU in Pismo Beach?
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 Pismo Beach?
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 Pismo Beach?
Owner-occupancy: only for a jadu. ADUs under 750 sq ft are also exempt from impact fees.
Sources
- Pismo Beach Municipal Code Chapter 17.117 (Ord. O-2021-001, 2021)
- §17.117.040(C)
- §17.117.080(A)(3)(c)
- §17.117.080(A)(5)
- §17.117.080(A)(4)
- §17.117.080(B)(C)(D)
- §17.117.080(A)(1)(c)
- §17.117.050; §17.124.030
- §17.117.050
- §17.117.040(D)(3)
- §17.117.080(C)
- §17.117.090
- 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 § 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 Pismo Beach'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 Pismo Beach Planning before relying on it.
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