California ADU rules · Stanislaus County
Can I Build an ADU in Turlock?
Yes — you can build an ADU in Turlock. California's statewide ADU law requires every city, including Turlock, 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
Turlock limits detached ADUs on multifamily lots to 2, not 8 as in state law.
Junior ADU (JADU)
Local ruleAllowed
Explicitly allowed; must be within primary dwelling.
Size & height
Max detached ADU size
Local rule1,200 sq ft
Local maximum matches state cap but is explicitly set.
Max attached ADU size
Local rule50% of primary, >=850 (>=1,000 for 2+ bedrooms)
Matches state law but locally codified.
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
Local rule500 sq ft
500 sq ft max; 150 sq ft minimum.
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, but at least one 800 sq ft ADU with 4 ft side/rear setbacks must be allowed
Front setback per zoning, but state override for one 800 sq ft ADU applies.
Separation from main house
Local ruleNone required
No separation required for ADUs; 6 ft for other accessory structures only.
Parking
Parking required
Local ruleUp to 1 space
1 off-street space per ADU, with multiple 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
Local ruleNot required
No replacement parking required for garage/carport conversion.
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
No owner-occupancy for ADUs; JADUs may require per state law, but no extra local rule.
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
CA state lawBuilding permit
Only a ministerial building permit — no conditional use permit or discretionary design review for a qualifying ADU.
Turlock-specific factors that can change the answer
State law sets the floor, but these local conditions often decide whether a specific parcel works.
Sprinkler requirements
ADUs within a structure that requires sprinklers must also have sprinklers.
Historic district/structure
ADUs in historic structures/districts must comply with objective historic standards and may be subject to CEQA review.
Turlock limits detached ADUs on multifamily lots to 2 and sets detailed local height rules for ADUs, including up to 20 ft if matching the primary dwelling's roof pitch. Historic and fire safety overlays may impose additional requirements.
Frequently asked questions
Can I build an ADU in Turlock?
Yes. California's statewide ADU law requires Turlock 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 Turlock?
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 Turlock?
Side and rear setbacks are limited to 4 ft. per base zone, but at least one 800 sq ft ADU with 4 ft side/rear setbacks must be allowed.
Is parking required for an ADU in Turlock?
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 Turlock?
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 Turlock?
Owner-occupancy: only for a jadu. ADUs under 750 sq ft are also exempt from impact fees.
Sources
- Turlock Municipal Code § 9-2-119 (Accessory Dwelling Units), amended June 14, 2024
- TMC § 9-2-119(d)(2)
- TMC § 9-2-119(d)(1)(B)
- TMC § 9-2-119(e)(1)
- TMC § 9-2-119(e)(2)
- TMC § 9-2-119(e)(4)
- TMC § 9-2-119(e)(5)
- TMC § 9-2-119(f)
- TMC § 9-2-119(f)(4)
- TMC § 9-2-119(g)
- TMC § 9-2-119(h)(1)
- TMC § 9-2-119(h)(2)
- 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 § 66321 (size minimums & height)
- Cal. Gov. Code § 66322 (ADU parking; § 66334 covers JADU parking)
- 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 Turlock'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 Turlock Planning before relying on it.
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