Accessory Structures in Montebello, CA (2026)
4 verified accessory structures rules for Montebello, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
In the City of Montebello, second dwelling units are permitted by right in every residential zone under Montebello Municipal Code Section 17.10.280, subject to a minimum ten-foot separation from the primary home, a floor-area cap tied to the primary dwelling's size, and matching architectural materials and colors.
Montebello Accessory Dwelling Unit Design Standards
Some RestrictionsMontebello Municipal Code § 17.10.280
C.Permitted by Right in R-1 and R-A Zones with Compliance to Standards. Second dwelling units shall be permitted as a matter of right, without any required discretionary review (conditional use permit), in conjunction with any existing single-family dwelling unit in the R-1 and R-A zones, provided any such second dwelling unit conform to the following standards:1.A second dwelling unit must be ...
ADU Owner Occupancy
In the City of Montebello, an owner who holds at least fifty percent ownership of a property with an accessory dwelling unit must live in either the primary house or the accessory unit as a full-time principal residence, and Montebello Municipal Code Section 17.10.280(C)(21) bars selling the ADU separately from the main home.
Montebello ADU Owner Occupancy Requirement
Significant RestrictionsMontebello Municipal Code § 17.10.280
21.An owner of the property upon which an accessory dwelling unit is located who has at least a fifty percent ownership of the property must utilize either the primary dwelling or the accessory dwelling as their principal place of full-time residence.22.The accessory dwelling unit shall not be owned or sold separately from the primary dwelling unit.
Shed & Carport Rules
In the City of Montebello, a detached accessory building such as a shed is capped at 500 square feet unless it's a garage, and it must clear the same setback table as the main house, with reduced side and rear setbacks available only when the shed carries no openings facing the property line, per Municipal Code Sections 17.08.020 and 17.10.040.
Montebello Accessory Building Size and Setbacks
Some RestrictionsMontebello Municipal Code §§ 17.08.020, 17.10.040, 17.10.050
"Accessory building" means a detached building, or structure, the use of which is subordinate and incidental to that of the main building, structure or use on the same lot. Such buildings, except garages, shall be limited in size to five hundred square feet. ... Side Other lots Accessory (not used for human habitation) 0 with no opening in facing wall; 5 feet with openings ... A.The distance be...
Garage Conversions
In the City of Montebello, an illegally converted garage in the R-A or R-1 zone can carry a recorded certificate of deferment instead of immediate code enforcement, but Montebello Municipal Code Section 17.10.250 requires the owner to obtain a certificate of occupancy, meaning full reconversion to a garage, before selling or transferring title.
Montebello Garage Conversion Enforcement Deferment Rules
Significant RestrictionsMontebello Municipal Code § 17.10.250
Any owner of a residential property in the R-A or R-1 zone having a garage or a detached structure which has been converted into living quarters in violation of the provisions of this code may obtain a deferment of enforcement as to such conversion until such time as the property is sold or title is otherwise transferred in accordance with the provisions of this section. ... B.Certificate of Oc...
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