California ADU rules · Fresno County
Can I Build an ADU in Coalinga?
Yes — you can build an ADU in Coalinga. California's statewide ADU law requires every city, including Coalinga, 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) + up to 2 detached
Local cap of 2 detached ADUs per multifamily lot, 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
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
Local rule50% of primary, up to 1,200 sq ft; must allow >=850 (1-bed) or >=1,000 (2+ bed)
Local cap of 1,200 sq ft for attached ADUs, but state minimums still apply.
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
Local rule4 ft
0 ft allowed if adjacent to alley or residential zone.
Rear setback
Local rule4 ft
0 ft allowed if adjacent to alley or residential zone.
Front setback
Local rulesubject to district standards; no explicit front setback for ADUs
No explicit front setback for ADUs; defaults to base zone.
Separation from main house
Local rule10 ft
Detached ADUs must be 10 ft from main residence.
Parking
Parking required
Local ruleUp to 1 space
1 off-street space per ADU; exemptions per state law.
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 required for parking lost to ADU 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 require owner-occupancy or deed restriction.
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 ruleBuilding permit, ADU permit (if not by-right)
Building permit required for all; ADU permit if not by-right.
Coalinga-specific factors that can change the answer
State law sets the floor, but these local conditions often decide whether a specific parcel works.
Fire sprinklers
Required for ADUs only if required for the primary residence.
Historic district parking exemption
No parking required for ADUs in historic districts.
Coalinga limits detached ADUs on multifamily lots to 2 per lot and requires a 10-foot separation from the main residence for detached ADUs. The city provides pre-approved ADU plans and allows 0-ft setbacks adjacent to alleys or residential zones.
Frequently asked questions
Can I build an ADU in Coalinga?
Yes. California's statewide ADU law requires Coalinga 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 Coalinga?
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 Coalinga?
Side and rear setbacks are limited to 4 ft. subject to district standards; no explicit front setback for ADUs.
Is parking required for an ADU in Coalinga?
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 Coalinga?
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 Coalinga?
Owner-occupancy: only for a jadu. ADUs under 750 sq ft are also exempt from impact fees.
Sources
- Coalinga Zoning Code, Sec. 9-8.507 (Ord. No. 853, eff. 10-20-2022)
- Sec. 9-8.507(d)(1), (c)
- Sec. 9-8.507(f)(1)(a), (c), (d)
- Sec. 9-8.507(f)(4)
- Sec. 9-8.507(f)(5)(c)
- Sec. 9-8.507(f)(2)
- Sec. 9-8.507(f)(2)(d)
- Sec. 9-8.507(d)(3), (b)(5)
- Sec. 9-8.507(d)(2)(b)
- Sec. 9-8.507(e)(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 § 66333 (junior ADUs)
- 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 Coalinga'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 Coalinga Planning before relying on it.
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