California ADU rules · Yuba County
Can I Build an ADU in Wheatland?
Yes — you can build an ADU in Wheatland. California's statewide ADU law requires every city, including Wheatland, 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.
Rules last verified September 25, 2026 · AI-assisted summary — verify the controlling rule with Wheatland Planning.
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
CA state lawConversion ADUs (≥1, up to 25% of units) + up to 8 detached
Conversions of non-livable space (at least 1, or up to 25% of existing units) plus up to 8 detached ADUs on a lot with existing multifamily — never exceeding the number of existing units. JADUs are single-family only.
Junior ADU (JADU)
CA state lawAllowed
Up to 500 sq ft, within the walls of an existing single-family home (single-family lots only).
If the lot used SB 9
CA state lawUnaffected — unless the lot used BOTH SB 9 powers
A city is not required to permit an ADU or JADU on a parcel that used both a two-unit development (§ 65852.21) and an urban lot split (§ 66411.7). Using only one of the two does not affect ADU eligibility, and even where both were used the city may still allow an ADU — the statute removes the obligation, it does not impose a ban.
Size & height
Max detached ADU size
Local rule1,200 sq ft
Local cap of 1,200 sq ft for detached ADUs is explicitly set.
Max attached ADU size
Local rule50% of primary dwelling or 1,200 sq ft, whichever is less
Attached ADUs are capped at 50% of the primary or 1,200 sq ft, 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, and a city may not set an ADU size limit below 850 sq ft (1,000 sq ft for two or more bedrooms) — for detached and attached units alike.
Max JADU size
CA state law500 sq ft
Max height
Local rule25 ft
Chapter 18.78 says 16 ft for a one-story detached ADU and 25 ft for a two-story detached ADU. Section 18.60.010 separately states 18 ft plus up to 2 ft for roof-pitch alignment for a detached ADU and up to 25 ft for an attached ADU; confirm the applicable limit with Wheatland.
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
CA state lawNo front setback may block the mandatory 800 sq ft / 16-ft / 4-ft-setback ADU; otherwise per base zone
Separation from main house
Local rule5 ft
Chapter 18.78 requires 5 feet between a detached ADU and the primary residence. Section 18.60.010 states a 4-foot general accessory-building separation; confirm the ADU-specific application with Wheatland.
Parking
Parking required
Local ruleUp to 1 space
One additional parking space per ADU, with state-mandated 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 when a garage or carport is demolished for an ADU.
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
CA state lawBuilding permit
Only a ministerial building permit — no conditional use permit or discretionary design review for a qualifying ADU.
Wheatland-specific factors that can change the answer
State law sets the floor, but these local conditions often decide whether a specific parcel works.
Historic District Parking Exemption
No parking required for ADUs located in a historic district.
Confirm height and building separation
Ordinance No. 507 uses different height and building-separation figures in Chapter 18.78 and Section 18.60.010. Ask Wheatland which provision applies to the proposed ADU before fixing the design envelope.
Wheatland adopted Ordinance No. 507 on June 9, 2026. It keeps a 1,200 sq ft detached cap, limits an attached ADU to 50% of the primary dwelling or 1,200 sq ft, and waives replacement parking for a converted garage or carport. Because the ordinance contains different height and separation language in Chapter 18.78 and Section 18.60.010, confirm those two design limits with the city before relying on them.
Frequently asked questions
Can I build an ADU in Wheatland?
Yes. California's statewide ADU law requires Wheatland 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 Wheatland?
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 Wheatland?
Side and rear setbacks are limited to 4 ft. No front setback may block the mandatory 800 sq ft / 16-ft / 4-ft-setback ADU; otherwise per base zone.
Is parking required for an ADU in Wheatland?
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 Wheatland?
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 Wheatland?
Owner-occupancy: only for a jadu. ADUs under 750 sq ft are also exempt from impact fees.
Sources
- Wheatland Ordinance No. 507 (Chapter 18.78), adopted June 9, 2026
- Wheatland Municipal Code § 18.78.030(B)(5)
- Wheatland Municipal Code § 18.78.030(B)(4)
- Wheatland Municipal Code § 18.78.030(B)(15)
- Wheatland Municipal Code § 18.78.030(B)(10)
- Wheatland Municipal Code § 18.78.030(B)(12)
- Wheatland Municipal Code § 18.78.030(B)(13)
- Wheatland Municipal Code § 18.78.030(B)(12)(b)
- Wheatland Ordinance No. 507, §§ 18.78.030(B)(10), (15) and 18.60.010
- 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 § 65852.21(f) (SB 9: ADU not required where BOTH SB 9 powers were used)
- Cal. Gov. Code § 66321 (size minimums & height)
- Cal. Gov. Code § 66322 (ADU parking; § 66334 covers JADU parking)
- 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 September 25, 2026. This is an AI-assisted summary of Wheatland'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 Wheatland Planning before relying on it.
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