Riverside County

La Quinta ADU rules

Research summary of what we found for City of La Quinta in Riverside County. Not a determination for a specific lot.

Last checked November 3, 2026.

City or county ADU page

How big can an ADU be in La Quinta?

Maximum size
A new detached ADU may be up to 1,200 sq ft. An attached ADU may be up to 850 sq ft, or 1,000 sq ft with more than one bedroom. A detached ADU built under the state's 800 sq ft rule is limited to 800 sq ft. An efficiency unit must be at least 150 sq ft.
Source: La Quinta Municipal Code § 9.60.090 Accessory dwelling units (Municode), § 9.60.090(C)(4)-(5), (C)(7), (C)(14)(a), accessed 2026-11-02.

ADU setbacks in La Quinta

Setbacks
New ADUs need no more than 4 ft side and rear setbacks. No setback is needed for existing living area or an accessory structure converted to an ADU, or a rebuild in the same place and size. The zone's front yard setback applies unless it would block an 800 sq ft ADU with 4 ft side and rear setbacks.
Source: La Quinta Municipal Code § 9.60.090 Accessory dwelling units (Municode), § 9.60.090(C)(9), (C)(13)(d), accessed 2026-11-02.

What we found for La Quinta

What we have for this place. Where a local figure is stricter than the California state baseline, both are shown.

Local ADU rules
La Quinta's ADU rules are in Municipal Code Section 9.60.090, last amended by Ordinance No. 618 (December 3, 2024). ADUs are allowed in the RVL, RL, RC, RM, RMH, RH, CR, CP, CC, CN, TC, CO and VC zones, and JADUs in the single-family zones. ADU and JADU permits are reviewed ministerially, without a hearing, and acted on within 60 days of a complete application when the lot already has a home.
Source: La Quinta Municipal Code § 9.60.090 Accessory dwelling units (Municode), § 9.60.090(A), (E) (Ord. 618 § 1, Exh. A, 12-3-2024), accessed 2026-11-02.

ADU types under state law
On a single-family lot: an ADU or JADU inside the home or an existing accessory structure (up to 150 sq ft added for entry and exit), and one new detached ADU up to 800 sq ft with 4 ft side and rear setbacks, which may be combined with a JADU. On multifamily lots: ADUs in non-livable space of existing buildings (at least one, up to 25% of existing units).
Source: La Quinta Municipal Code § 9.60.090 Accessory dwelling units (Municode), § 9.60.090(C)(13)-(15), accessed 2026-11-02.

Height
A detached ADU may be 16 ft. It may be 18 ft within a half mile walk of a major transit stop or high-quality transit corridor, or on a lot with a multistory multifamily building, plus 2 ft to match the main home's roof pitch. An attached ADU may be 25 ft or the main home's height limit, whichever is lower.
Source: La Quinta Municipal Code § 9.60.090 Accessory dwelling units (Municode), § 9.60.090(C)(14)(b)-(f), accessed 2026-11-02.

Parking
No more than one space per ADU or per bedroom, whichever is less, which may be tandem on a driveway or in setback areas. No space is needed within a half mile walk of public transit, in a historic district, for an ADU inside the home or an accessory structure, where on-street permits are required but not offered, within one block of a car share vehicle, or when the ADU is filed with a new home or multifamily building. Garage, carport or covered spaces removed for an ADU do not have to be replaced. JADUs need no parking.
Source: La Quinta Municipal Code § 9.60.090 Accessory dwelling units (Municode), § 9.60.090(C)(12), (D)(7), accessed 2026-11-02.

Junior ADUs
One JADU per single-family lot, 150 to 500 sq ft, inside the walls of the proposed or existing home, with an efficiency kitchen and its own entrance (plus an interior door if it has no separate bathroom). The City may require a recorded covenant against separate sale. A JADU is not a separate unit for water, sewer or power service. No parking is needed.
Source: La Quinta Municipal Code § 9.60.090 Accessory dwelling units (Municode), § 9.60.090(B)(2), (D)(1)-(8), accessed 2026-11-02.

Fees, sprinklers and rentals
No impact fees for an ADU under 750 sq ft; ADUs of 750 sq ft or more pay in proportion to the main home's size. Fire sprinklers are not needed if the main home does not need them. ADUs may be rented for more than 30 days but may not be used as short-term vacation rentals, and may not be sold separately except through a qualified nonprofit as state law allows. Lots on septic need county health and regional water board sign-off.
Source: La Quinta Municipal Code § 9.60.090 Accessory dwelling units (Municode), § 9.60.090(C)(1), (C)(11), (C)(16), (C)(18), (C)(20), (G), accessed 2026-11-02.

State housing department (HCD) review
On June 24, 2026, HCD found that La Quinta's ADU ordinance (No. 618, adopted December 3, 2024) does not comply with state ADU law on several points: outdated Government Code references, the 50% size cap for attached ADUs without the 800 sq ft exception, the one-ADU-and-one-JADU limit, owner occupancy for every JADU, and missing completeness timelines. HCD gave the City up to 30 days to respond. Confirm the current rules with the City of La Quinta.
Source: HCD ordinance review letter, City of La Quinta, Letter of June 24, 2026, accessed 2026-11-02.

California state rules

The statewide baseline recorded from state law and the HCD ADU Handbook.

Detached size cap described in state law
1,200 sq ft. From Government Code section 66314.
Source: California Government Code section 66314, 66314, accessed 2026-10-16.

Side and rear setback cap for a new ADU
4 ft. From Government Code section 66314, which describes a cap on side and rear setbacks for a new ADU.
Source: California Government Code section 66314, 66314, accessed 2026-10-16.

Setback for a conversion of an existing structure
No additional setback, from Government Code section 66314 for a conversion of an existing structure.
Source: California Government Code section 66314, 66314, accessed 2026-10-16.

Minimum lot size
A city may not impose a minimum lot size for an ADU, from Government Code section 66314.
Source: California Government Code section 66314, 66314, accessed 2026-10-16.

Minimum unit the handbook says cities must allow
At least an 800 sq ft ADU with 4 ft side and rear setbacks. The HCD ADU Handbook (updated March 2026) describes this under section 66321(b)(3).
Source: HCD ADU Handbook, 66321(b)(3); handbook updated March 2026, accessed 2026-10-16.

Detached height described in the handbook
16 ft, or 18 ft or 20 ft in some cases. The HCD ADU Handbook (updated March 2026) describes this under section 66321(b)(4).
Source: HCD ADU Handbook, 66321(b)(4); handbook updated March 2026, accessed 2026-10-16.

Permit decision deadline
60 days. From Government Code section 66317(a)(3): the permitting agency must decide on (approve or deny) a completed ADU application within 60 days when an existing single-family or multifamily dwelling is on the lot. Section 66317(a)(1) says the application is considered ministerially, without discretionary review or a hearing.
Source: California Government Code section 66317, 66317(a)(1), (a)(3), accessed 2026-10-17.

Owner-occupancy requirement
None. From Government Code section 66315: a local agency may not impose an owner-occupancy requirement on an ADU. It may require that the property be used for rentals of terms 30 days or longer. The HCD ADU Handbook (updated March 2026) describes the same rule.
Source: California Government Code section 66315, 66315; HCD ADU Handbook updated March 2026, accessed 2026-10-17.

Parking near public transit
No parking standards within one-half mile walking distance of public transit. From Government Code section 66322(a)(1). Section 66322(a) lists several other cases where parking standards may not be imposed.
Source: California Government Code section 66322, 66322(a), accessed 2026-10-17.

Ministerial categories
The HCD ADU Handbook (updated March 2026) states that Government Code section 66323 sets four ministerial categories. What we have does not restate those four categories.
Source: HCD ADU Handbook, 66323; handbook updated March 2026, accessed 2026-10-16.

Fire Hazard Severity Zones
If your lot is in a Fire Hazard Severity Zone, the CAL FIRE Office of the State Fire Marshal says in Information Bulletin 25-004 (issued March 3, 2025): “Fire Hazard Severity Zones (FHSZs) should not restrict the development of Accessory Dwelling Units (ADUs). However, additional building standards may be necessary, including but not limited to California Fire Code Chapter 49 and California Building Code Chapter 7A.” State ADU law does not itself bar an ADU there. A city or county may still apply its building code, including wildfire-resistant construction (Gov. Code 66314(d)(8)); require side and rear setbacks “sufficient for fire and safety” for a unit converted under 66323(a)(1); and decline parking in setbacks on specific fire and life safety findings (66314(d)(10)(B)). It may also consider public safety when it designates where ADUs may be permitted (66314(a)). Sprinklers can't be required in an ADU or JADU if the primary residence doesn't need them (66314(d)(12), 66323(d)). Some cities and counties still apply their own fire-zone limits. Where this summary has one, it is listed with the local rules. This summary does not look up your lot. Check the CAL FIRE Fire Hazard Severity Zone map viewer linked from the State Fire Marshal's Fire Hazard Severity Zones page: https://experience.arcgis.com/experience/5065c998b4b0462f9ec3c6c226c610a9
Source: CAL FIRE Office of the State Fire Marshal Information Bulletin 25-004, page 4, issued March 3, 2025; Gov. Code 66314, 66323, accessed 2026-10-20.

State baseline on the directory → · State ADU rules on the homepage →

Can I build an ADU in La Quinta?

State law sets a baseline for ADUs in La Quinta, and what we found locally is listed on this page. Whether a specific lot can add an ADU depends on zoning, utilities, and other site facts this page does not measure. Confirm with the City of La Quinta Design and Development Department (Planning), or run a free address summary.

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