El Monte's Accessory Structures: The Rules That Matter

Every city handles accessory structures a little differently. In El Monte, California, there are 9 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.

ADU Permits

ADU and JADU applications in El Monte are reviewed ministerially within 60 days through the City's CSS online permitting portal. Building, fire, and life-safety review still applies.

Key details: Review type: Ministerial. Statutory deadline: 60 days. Submission: CSS Portal online. Contractor insurance: City must be named additional insured. Fee schedule: FY25-26, effective 7/1/2025.

Building without permits triggers stop-work orders under Cal. Health & Safety Code §17980 and administrative citations under the El Monte Municipal Code. Work performed without a license is also subject to Cal. Business & Professions Code §7028 penalties.

El Monte is more permissive than most cities when it comes to adu permits. That said, there are still limits.

ADU Rental Restrictions

El Monte ADUs and JADUs may only be rented for terms longer than 30 days. Vacation/short-term rental of an ADU is prohibited by state law and reflected in the City's ADU Program Guidelines.

Key details: Minimum rental term: 31+ days. Short-term rental of ADU: Prohibited. Source of restriction: Cal. Gov. Code §65852.2(a)(6). Separate sale of ADU: Generally prohibited.

Operating an ADU as a short-term rental violates the City's ministerial ADU approval and may be cited under EMMC administrative citation authority. Continued violation can lead to revocation of any business tax certificate and code enforcement liens.

Carport Rules

Carports count as accessory structures and may be used to satisfy required covered residential parking. They must meet the 4-foot side/rear setbacks, be located behind the front half of the lot, and require a building permit.

Key details: Permit required: Yes — building permit under EMMC Title 15. Side/rear setback: 4 ft minimum. Front placement: Behind midpoint of lot depth. Counts as covered parking: Yes, if permanent roof. Max height: 1 story (residential zones).

Unpermitted carports receive a Notice of Violation requiring permits or removal. Per EMMC Chapter 1.20, fines are $100 / $200 / $500 for first, second, and additional offenses within one year. If the carport is being used to satisfy required parking, removal may cascade into a parking violation requiring restoration of off-street covered parking.

ADU Owner Occupancy

El Monte does not impose owner-occupancy on detached/attached ADUs permitted between Jan 1, 2020 and Jan 1, 2025 (Cal. Gov. Code §65852.2(a)(6) sunset). JADUs always require owner-occupancy of the property under §65852.22(a)(2).

Key details: ADU owner-occupancy: Not required. JADU owner-occupancy: Required. Deed restriction (JADU): Required, recorded with LA County. Exception: Governmental agency, land trust, housing org.

Failure to record the §65852.22(a)(5) JADU deed restriction will block final inspection. Subsequent violation of the owner-occupancy covenant can trigger code enforcement and recission of JADU approval.

The rules around adu owner occupancy in El Monte lean permissive, but that does not mean anything goes.

ADU Impact Fees

Under SB 13 (Cal. Gov. Code §65852.2(f)) and Cal. Education Code §17620, El Monte cannot charge any development impact fee on ADUs under 750 sq ft. Larger ADUs are charged proportionally to the primary dwelling.

Key details: Impact fees < 750 sq ft ADU: $0 (state-prohibited). Impact fees ≥ 750 sq ft ADU: Proportional to primary. Shared water/sewer connection: No new connection fee. School fees (≤500 sq ft): Exempt. Protest deadline: 90 days (§66020).

Improperly charged impact fees on a sub-750 sq ft ADU are reimbursable; applicants may protest under Cal. Gov. Code §66020 within 90 days of fee imposition. The HCD Accountability Unit also accepts complaints for state ADU law violations.

If you are coming from a city with tighter rules, you will find El Monte gives residents more flexibility on adu impact fees.

ADU Rules

El Monte allows one ADU and one JADU on single-family lots, with detached ADUs up to 1,200 sq ft. Standards follow Cal. Gov. Code §65852.2 / §65852.22 and are codified in the El Monte Zoning Code (adopted 6-21-22, amended 5-14-25).

Key details: ADU permit: Ministerial (no hearing). Max detached ADU: 1,200 sq ft. Max JADU: 500 sq ft. Min side/rear setback: 4 ft. Max height (detached): 16 ft.

ADUs built without permits are subject to El Monte Code Enforcement action under EMMC Title 1 administrative citation provisions. Cal. Health & Safety Code §17980.12 limits the City's ability to require demolition of unpermitted ADUs built before 2020 and instead requires a 5-year compliance window for code-related violations not posing a life-safety threat.

The rules around adu rules in El Monte lean permissive, but that does not mean anything goes.

Shed Rules

One-story detached storage sheds up to 120 sq ft and 15 ft tall are exempt from building permits but must comply with zoning setbacks: minimum 4 ft from side and rear property lines and located behind the front half of the lot.

Key details: Permit-exempt size: Up to 120 sq ft and 15 ft roof height. Side/rear setback: 4 ft minimum. Front placement: Must be in rear 50% of lot. Max total accessory area: 800 sq ft (residential zones). Stories: 1 story maximum.

Code enforcement issues a Notice of Violation requiring removal, relocation, or after-the-fact permitting. Per EMMC Chapter 1.20 (General Penalty), administrative citations start at $100 for the first offense, $200 for the second, and $500 for each additional violation within one year. Continued non-compliance may be charged as a misdemeanor.

Tiny Homes

El Monte has no local ordinance permitting tiny homes on wheels (movable tiny houses) as primary or secondary dwellings. Tiny homes are permitted only if built on a permanent foundation and meet ADU standards under state law and EMMC Title 17.

Key details: Tiny home on wheels as primary residence: Not permitted. Tiny home as ADU (on foundation): Permitted up to 1,200 sq ft detached. Minimum dwelling size: 150 sq ft (CBC efficiency unit). Max detached ADU height: 16 ft (18 ft for 2-story per state law). JADU max size: 500 sq ft within existing dwelling.

Living in a tiny home on wheels on a residential lot is enforced as both a nuisance and a zoning violation. Per EMMC Chapter 1.20, fines start at $100, escalating to $200 and $500 per offense within one year. Code enforcement can also issue an order to vacate the structure. Unpermitted foundation-installed tiny homes may be ordered demolished or require costly retroactive permitting under EMMC Title 15.

Compared to other cities, El Monte takes a harder line on tiny homes. The enforcement and penalty structure reflects that.

Garage Conversions

El Monte permits garage-to-ADU conversions under state ADU law: no replacement parking required and the converted garage may be reconstructed up to its original footprint as an ADU.

Key details: Garage-to-ADU conversion: Allowed by-right under state law. Replacement parking: Not required (Gov. Code §66314(a)(1)(D)). Permit required: Yes — building permit + plan check. Non-ADU conversion: Replacement parking required. Max ADU size (attached/converted): 1,200 sq ft or 50% of primary, whichever greater.

Unpermitted garage conversions trigger a Notice of Violation requiring either restoration of the garage to original use or after-the-fact permits. Per EMMC Chapter 1.20, administrative citations escalate from $100 to $500 per violation within one year. Health and safety hazards (no egress windows, missing smoke detectors, illegal wiring) may also be cited under the California Residential Code as adopted in EMMC Title 15.

El Monte is more permissive than most cities when it comes to garage conversions. That said, there are still limits.

The Bottom Line

Compared to many U.S. cities, El Monte gives residents more room on accessory structures. 5 of the 9 rules here are rated permissive. But permissive does not mean unregulated. There are still requirements, and the city does enforce them when violations are reported.

All of the above reflects El Monte'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.