Murrieta's Accessory Structures: The Rules That Matter

Every city handles accessory structures a little differently. In Murrieta, California, there are 4 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Shed & Carport Rules

Murrieta lets homeowners skip a building permit for a portable storage shed under 120 square feet, but Section 16.44.150 still caps detached accessory structures at 1,000 square feet and sets exact setbacks by shed size in Table 16.44.150-1.

Key details: Permit-exempt shed size: Under 120 sq ft. Max single detached structure: 1,000 sq ft. Combined structure cap: 40% of required rear yard. Setback, shed over 120 sq ft: 5 ft (10 ft near street). Setback, shed under 120 sq ft: 3 ft to furthest projection.

A shed exceeding the applicable setback or the 1,000-square-foot single-structure cap, or a combined detached-structure footprint over 40 percent of the required rear yard, is out of compliance with Section 16.44.150 and can be required to obtain development plan approval under Chapter 16.56 or be brought into conformance before final inspection.

ADU Rental Restrictions

Every ADU and JADU approved in Murrieta must carry a recorded covenant, under Section 16.44.160.E.4, barring the unit from being rented for stays shorter than 30 days, closing off the short-term rental route for accessory units citywide.

Key details: Governing section: § 16.44.160.E.4. Minimum rental term: 30 days. Applies to: All approved ADUs and JADUs. Enforcement mechanism: Recorded covenant against title. Survives sale of property: Yes, runs with the land.

Renting an ADU or JADU for stays under 30 days breaches the recorded covenant required by Section 16.44.160.E.4, which the city can pursue as a Development Code violation once discovered. General Development Code violations are prosecuted under the citywide penalty chapter, Section 1.08.050: a first offense is an infraction capped at $100, rising to $200 and then $500 for repeat violations within a year, and the city attorney can pursue a misdemeanor charge carrying up to $1,000 and six months in county jail for serious or repeated noncompliance, with each day of an ongoing violation a separate offense.

This is one of the stricter rules in Murrieta's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.

ADU Rules

Murrieta allows one ADU and one JADU on any single-family lot, and two detached ADUs on multi-family parcels, reviewed ministerially within 60 days with no discretionary hearing, under Section 16.44.160.

Key details: Single-family lot allowance: 1 ADU + 1 JADU. Multi-family lot allowance: 2 detached ADUs. Review type: Ministerial, no hearing. City decision deadline: 60 days. Extra parking required: 1 space, with 6 waiver categories.

Because ADU and JADU review is ministerial under Section 16.44.160.C, the city cannot deny a conforming application or add discretionary conditions; noncompliant construction, such as an ADU without the required recorded no-short-term-rental covenant or built without the mandatory off-street parking space, is enforced as a development code violation under Murrieta's general penalty at Section 1.08.050, with infraction fines escalating from $100 to $500 across a year and misdemeanor exposure of up to $1,000 and six months in jail on a third violation. Section 16.44.160.I makes state ADU law control wherever it conflicts with the local section.

ADU Owner Occupancy

Murrieta's Development Code does not require the owner to live on-site for a standalone ADU, but a junior accessory dwelling unit only clears review if the owner records a covenant promising to occupy either the main house or the JADU, per Section 16.44.160.E.2.

Key details: Governing section: § 16.44.160.E.2. Applies to: Junior accessory dwelling units (JADUs). Standard ADU: No owner-occupancy covenant required. Recording location: Riverside County Clerk's office. Review type: Ministerial, no public hearing.

Because the owner-occupancy condition is enforced through a recorded covenant against title rather than a standalone criminal penalty section, the practical remedy is a city determination that the JADU no longer complies with Section 16.44.160, which can trigger code enforcement action; separately, any general violation of a Development Code requirement is prosecutable under the citywide penalty chapter, Section 1.08.050, as an infraction escalating from $100 to $500 for repeat offenses within a year, or as a misdemeanor with up to a $1,000 fine and six months in jail for repeated or serious violations.

The Bottom Line

Murrieta's accessory structures rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Murrieta is broadly strict or permissive.

All of the above reflects Murrieta's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.