License: No. #1076712
Discover what you can build in the City of Hawthorne. This city guide covers essential Custom Home regulations and zoning laws to help you navigate the process and make informed decisions for your property.
Up to one Custom Home and one JCustom Home can be built on a single-family lot in Hawthorne.
Multifamily property owners in Hawthorne may convert existing uninhabitable space into at least one Custom Home, and additional Homes not to exceed a maximum number equal to 25% of the existing units. Ergo:
No more than two detached Homes may be constructed on a multifamily lot in Hawthorne.
A detatched Custom Home in Hawthorne can be up to 1,200 square feet.
An attached Custom Home in Hawthorne can be up to 1,200 square feet, or 50% of the size of the primary dwelling unit, whichever is smaller.
A Custom Home in Hawthorne may be no more than 16 feet high. If the Custom Home is built over a garage, it may reach a height of up to 25 feet.
With most Homes limited in height to 16 feet unless they are a single story above a garage, a two-story Custom Home will usually not be permitted in Hawthorne due to height restrictions.
No, Homes cannot be stacked one on top of each other on two stories in Hawthorne.
Two Homes are only permitted on multifamily property. Hawthorne regulations do not specify the configurations, and two attached Homes may be permitted on a case-by-case basis.
No, a JCustom Home is defined as A Custom Home converted from existing space within the main structure of the primary dwelling unit. As such, it cannot be attached to A Custom Home.
Generally roof decks would be permitted on A Custom Home, but must meet the height restrictions for the zone. Roof decks cannot encroach into the required setbacks. As a rule of thumb, railings and access staircases above 42″ need to be included in height calculations.
In Hawthorne the Custom Home must match the architectural design of the proposed or existing structure. This includes using the same exterior material, roof material, color, and architectural details of the main dwelling unit.
Homes behind the primary dwelling unit in Hawthorne require a minimum of 4-foot side and rear setbacks.
Hawthorne does not specify specific building separation for Homes from the primary dwelling unit or other structures. Enough separation must be maintained to comply with fire codes and reduce the risk of fires spreading from one building to another. Separation requirements will be determined in the planning stage.
Homes are generally not allowed in the front yard in Hawthorne.
No, the City of Hawthorne encourages online submission of plans to the Hawthorne Planning Department via the Hawthrone Citizen Self Service Portal.
Hawthrone may require a soils report for Custom Home permitting to make sure the soil can support the new structure, especially if the Custom Home will be located on a hillside, an area with significant grading, or if there are special foundation requirements.
Hawthorne specifies no specific requirements for “green” space or permeable surface on your landscaping when constructing A Custom Home. However, green space and permeable surface may become an issue in the approval process if the Custom Home covers a significant portion of the lot.
The plan check requires a review by the Planning Department for zoning, building standards, and safety compliance. The process takes approximately 4-5 weeks.
Hawthorne requires one new parking space be added per new Custom Home. However, if the property is within one mile of a public transit stop and/or if the Custom Home or JCustom Home in question is being converted from existing space within the main dwelling unit, the Custom Home is exempt from the requirement of extra parking.
If a parking space must be added, it can be included on the driveway or any setback areas, and it may be configured as tandem parking.
Per Title 24 of the California Energy Code, solar panels of appropriate size and capacity are mandatory on new-construction Homes. Homes built from converted existing structures are exempt, as may be Homes located under significant shading. Smaller Homes may be subject to reduced or modified solar panel requirements.
A Custom Home is not required to have a separate water or electrical meter. You can opt for the Custom Home to share service with the main dwelling unit. However, you can request separate water or electrical meters from the City of Hawthorne.
Hawthorne does not automatically assign a new Custom Home its own address. However, it may assign the Custom Home a new address if it is intended for rental or independent occupancy. The Custom Home will usually get a “½” designation — for example, A Custom Home located behind 1234 Pine Street would have the address “1234½ Pine Street.”
Low Impact Development (LID) is an approach to land development or redevelopment that seeks to preserve and conserve onsite water quality and natural features, with minimal detrimental effect to local waterways and ecosystems. Hawthorne may require LID fees for larger Homes.
A Custom Home may not be used as an Airbnb or short-term rental in Hawthorne.
Per the Costa-Hawkins Act of 1995, Hawthorne does not impose rent control on dwellings constructed after February 1, 1995. This means most new-build Homes are exempt. However, if the primary dwelling unit is subject to rent control, it might apply to the Custom Home as well.
While encouraging the use of electric appliances for efficiency and sustainability, Hawthorne does not prohibit gas appliances in new Homes as long as all relevant installation and safety standards are met.
In Hawthorne you are only required to install sprinklers in a new Custom Home if the primary dwelling unit has them as well. You may also be required to install them if the Custom Home is located within a special fire hazard zone.
