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

Hawthorne Municipal Code Chapter 17.48 allows fences, walls, and hedges up to 6 feet on any part of a lot. In the front yard or along a street frontage, the maximum is 3.5 feet within the required visibility triangle. Heights above 6 feet (up to 10 feet) require a fence conditional use permit.

Hawthorne Municipal Code 17.48.020 addresses retaining walls. Where a retaining wall holds fill, its height is not counted toward fence height, but a fence above it cannot exceed 6 feet. A retaining wall protecting a cut on a lot line may be topped by a fence of the height otherwise permitted. A building permit is required.

Hawthorne requires a building permit for any fence or wall in any zone. Per the city's code, no fence or wall may be constructed in any zone classification without first obtaining a building permit, and the planning department reviews fences before construction. Fences over 6 feet need a fence conditional use permit.

Hawthorne's code governs fence height, materials, and permits, but shared boundary-fence cost-sharing is governed by California Civil Code 841 (the Good Neighbor Fence Law). Adjoining owners are presumed to share equally in construction and maintenance costs, and 30 days' written notice is required before incurring costs.

Approved fence and wall materials in Hawthorne are wrought iron, wood, decorative block (slump stone or split face), brick, stone or stone veneer, and building-matching stucco. Chain link, wire mesh, and precision block are not permitted under HMC 17.48.020. All fences require a building permit and planning review.

Hawthorne Zoning Code 17.20.160 requires any swimming pool, pond, spa, or hot tub deeper than three feet to be enclosed by a structure, fence, or wall six feet in height. Any gate or door to the outside must have a self-closing and self-latching device located not less than four feet above the ground.

A private swimming pool in the City of Hawthorne is an accessory use regulated under Zoning Code 17.20.160. It cannot sit in a required front yard or within five feet of an exterior property line, and a building permit is required for construction, plumbing, and electrical work.

Hawthorne combines its local 17.20.160 enclosure rule (six-foot barrier, self-closing/self-latching gate four feet up) with California's Swimming Pool Safety Act. At permit time the City enforces Health and Safety Code 115922-115928, which requires new residential pools to have an approved enclosure plus a qualifying drowning-prevention feature.

Hawthorne's pool rules apply by water depth, not pool type. Any pool, pond, spa, or hot tub deeper than three feet - including an above-ground pool - must have a six-foot enclosure with a self-closing/self-latching gate (latch four feet up) under Zoning Code 17.20.160, and electrical and structural permits still apply.

Hawthorne names spas and hot tubs directly in Zoning Code 17.20.160. Any spa or hot tub deeper than three feet must be enclosed by a six-foot structure, fence, or wall with a self-closing/self-latching gate (latch four feet up). Spas also follow the accessory-use setback: not in a front yard, five feet from property lines.

The City of Hawthorne regulates ADUs and JADUs under Hawthorne Municipal Code Chapter 17.21, which implements California's state ADU law. ADUs are permitted in any residential or mixed-use zone allowing housing. A single-family site may have one ADU plus one JADU; JADUs are capped at 500 square feet within the primary dwelling.

Hawthorne allows converting an existing garage to an ADU or JADU under Municipal Code Chapter 17.21, consistent with California state ADU law. A JADU is capped at 500 square feet within the primary single-family dwelling. Converting garage space into living area without permits is a code violation, and any habitable conversion must meet building-code standards.

Hawthorne Municipal Code Section 17.20.160 governs accessory buildings and structures, including sheds. Storage rooms and tool sheds for customary household items are limited to a maximum of 120 square feet, may be wired for electrical service, but may not have plumbing. Buildings and structures must stay at least 10 feet from an alley centerline.

The City of Hawthorne has no standalone tiny-home or tiny-house-on-wheels ordinance. A fixed-foundation tiny house used as a second dwelling is regulated as an ADU under Municipal Code Chapter 17.21 and California state ADU law. Movable tiny houses on wheels are treated like recreational vehicles and are not permitted as permanent dwellings.

Hawthorne regulates carports under the residential development standards in Municipal Code Chapter 17.20. Carports may substitute for required garages on key and interior lots only where parking is screened from the street by a building or wall. Fabric and prefabricated metal carports are prohibited, and canopies are not allowed in any setback area or over driveways.

Hawthorne Municipal Code Section 8.32.070 limits cooking, recreational, and ceremonial outdoor fires on private property to commercially produced containers (or containers approved by the LA County Fire Department), and only certain clean fuels are allowed. The City contracts fire protection to the Los Angeles County Fire Department.

Open outdoor burning of trash, leaves, brush, or debris is effectively banned in Hawthorne. South Coast AQMD Rule 444 prohibits open burning in the South Coast Air Basin without a permit, and Hawthorne's adopted LA County Fire Code bars open burning that creates a hazard. Only approved contained recreational fires are allowed.

Hawthorne requires a permit from the Director of Parks and Recreation to cut, trim, prune, plant, remove, or interfere with any tree, shrub, or plant in a city street, park, parkway, alley, or city property. Trees on private property are not subject to that permit, but owners must keep them from becoming a hazard.

Removing a tree in a Hawthorne street, parkway, park, alley, or on city property requires a permit from the Director of Parks and Recreation - the same authority that governs trimming. The code does not impose a citywide heritage-tree permit for trees on private property; private-tree removal is generally unregulated unless tied to development review.

Hawthorne's Water Conservation Program assigns watering days by address parity and limits landscape irrigation to before 8 a.m. and after 6 p.m., not within 48 hours of measurable rain. It bans hosing down hard surfaces, runoff, and washing vehicles without a shut-off nozzle, with tighter limits in higher drought stages.