Before You Build in Alhambra, CA: Permit & Rule Checklist (2026)

Alhambra Zoning Code 23.12.050 limits fences, walls and dense hedges to a maximum of three feet in the front yard or within five feet of a street side property line, and six feet on all other portions of a residential lot, measured from finished grade.

Per the City of Alhambra's Community Development Department, a building permit is not usually required for a fence, but a Planning application is required, and the type of application depends on the fence or wall proposed. Applicants must submit a site plan showing property lines, location, length, height and design.

Alhambra's Zoning Code 23.12.050 requires the finished side of all perimeter fencing to face adjacent properties. Boundary-fence cost sharing between neighbors is governed by California Civil Code 841 (Good Neighbor Fence Law), which presumes equal responsibility and requires 30 days' written notice before incurring costs.

Under Alhambra Zoning Code 23.12.050, where a retaining wall exists, a fence or wall on top may not exceed three feet measured from the grade of the retained dirt, and in no event may the retaining wall together with the fence or wall exceed six feet above sidewalk elevation.

Alhambra Zoning Code 23.12.050 favors finished, architecturally treated materials. Grey smooth block must be treated (sand-finish stucco, veneer or similar); wire and chain link are restricted; and hazardous materials like barbed, razor and electrified wire are barred unless legally required.

Alhambra's pool safety standards are set primarily by California's Swimming Pool Safety Act, adopted locally through Municipal Code Chapter 20.15 (Swimming Pool and Spa Code) and referenced in zoning Section 23.12.150. New and remodeled residential pools need two of seven drowning-prevention features and anti-entrapment suction outlets, all inspected by the city building official before final approval.

Alhambra zoning Section 23.12.150 governs all swimming pools and spas deeper than 18 inches, which captures most above-ground pools. They may not be placed in a required front yard, must sit at least three feet from interior side/rear property lines and five feet from a street-side property line, and must meet the city's Swimming Pool and Spa Code and California's pool safety law.

Building a swimming pool or spa in the City of Alhambra requires a building permit from the Building Division, plus a plumbing permit for pool equipment. Pools and spas must satisfy the city's Swimming Pool and Spa Code (Municipal Code Chapter 20.15) and the zoning setback rules of Section 23.12.150 in addition to California's statewide drowning-prevention requirements.

Alhambra requires pools and spas deeper than 18 inches that are not enclosed in a building to comply with Municipal Code Chapter 9.52 and the city's Swimming Pool and Spa Code. Under California's Swimming Pool Safety Act, new and remodeled residential pools must have at least two of seven drowning-prevention features, which typically means an isolation enclosure with a self-closing, self-latching gate.

Alhambra zoning Section 23.12.150 covers spas alongside swimming pools: spas and their equipment may not sit in a required front yard and must meet the same three-foot interior/rear and five-foot street-side water-line setbacks. Spas deeper than 18 inches that are not enclosed in a building must comply with Municipal Code Chapter 9.52 and California's pool safety law, though approved spa safety covers can satisfy the barrier requirement.

Alhambra allows existing garages and accessory structures to be converted into ADUs or JADUs ministerially under Zoning Code 23.22.040. Conversions within existing footprints need no added setback and no replacement parking, but the converted space must meet building, fire, and habitability codes.

The City of Alhambra permits accessory dwelling units and junior ADUs ministerially under Zoning Code Section 23.22.040, implementing California Government Code 66310 et seq. Detached ADUs may reach 1,200 sq ft on single-family lots; JADUs are capped at 500 sq ft. ADUs may not be used as short-term rentals.

Alhambra regulates sheds as detached accessory structures under its Zoning Code. One-story tool/storage sheds, playhouses and similar uses up to 120 sq ft and 12 feet tall are permitted, while larger accessory structures cap at 15 feet and must sit at least 3 feet from interior side and rear lot lines.

Alhambra has no separate 'tiny home' ordinance. A tiny home placed on a permanent foundation can be permitted as an ADU under Zoning Code 23.22.040, but a tiny home on wheels is treated as an RV under California law and cannot be used as a permanent residence.

Alhambra regulates carports as detached accessory structures in its Zoning Code. They may not exceed 15 feet in height, must be set back at least 3 feet from interior side and rear lot lines, and are reviewed through Minor Site Plan Review along with other accessory structures.

Recreational fires and outdoor fire pits in Alhambra are governed by the 2022 California Fire Code, adopted as Chapter 19.02 of the Alhambra Municipal Code and enforced by the Alhambra Fire Department. The Fire Code allows small recreational fires and approved portable outdoor fireplaces but requires safe clearances from structures and bans open burning of trash.

Open burning in Alhambra requires a permit from the Alhambra Fire Department before any fire is started. Per the Department's published requirements, open burning must stay 50 feet from structures (15 feet in an approved appliance), be attended with water ready, and can be stopped by the Fire Chief if smoke is offensive. SCAQMD burn-day rules also apply.

Routine trimming or pruning that does not damage or kill a tree is exempt from Alhambra's tree-removal permit. But topping, severe pruning, or any work that materially alters or harms a protected tree requires a permit. Street (parkway) trees may only be trimmed by City Public Works crews.

Alhambra runs its own Water Division and has mandatory conservation in effect since June 10, 2022: landscape watering no more often than every three days, never between 10 a.m. and 5 p.m., and not within 48 hours after measurable rain. Hosing hardscape and washing vehicles without a shut-off nozzle are prohibited.

Alhambra requires a Tree Removal Permit (AMC 23.12.170) to remove protected oaks, California native trees, and mature trees on private property. Replacement trees are required by a set formula. Illegal removal brings administrative citations, doubled replacement, and up to a 1-year ban on future permits.