Antioch ADU Permit & Building Guide
Building an ADU in Antioch is an excellent way to create additional living space, generate long-term rental income, and increase your property’s overall value. The City of Antioch supports the development of accessory dwelling units as a way to expand housing options for residents while maintaining the character of existing neighborhoods. With Apex Homes, homeowners can take advantage of expert feasibility studies, tailored designs, and a smooth permitting process to turn their backyard into a smart investment.
ADU Regulations in Antioch
Antioch follows California’s state ADU laws but has its own local standards regarding size, placement, and design. For single-family properties, homeowners may build one detached or attached ADU and one Junior ADU (JADU). For multi-family lots, up to two detached or attached ADUs are allowed in addition to interior conversions of existing spaces such as garages or storage areas.
The maximum size for a detached ADU in Antioch is 1,000 square feet. Setbacks are straightforward: ADUs must be at least four feet from the side and rear property lines, a minimum of 30 feet from the front property line, and at least 20 feet from any street-facing property line if it differs from the front. Detached ADUs may be up to 16 feet in height and are limited to one story. These standards help ensure privacy, safety, and compatibility with surrounding homes while giving property owners flexibility in design.
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The Antioch ADU Permitting Process
To obtain an ADU permit in Antioch, start by verifying your property’s zoning and reviewing the city’s ADU standards. Selecting a compliant design—ideally one that has already been reviewed or pre-approved—can help expedite the process. Once your design is finalized, prepare a complete submittal package including site plans, elevations, structural drawings, and Title 24 energy compliance documentation.
Applications are submitted through the Antioch Building Division, and review typically takes between two to four months, depending on project scope. Once approved and all fees are paid, permits are issued, and construction can begin. Apex Homes works closely with homeowners throughout this process, providing full-service design, permitting, and construction support to ensure your ADU is completed efficiently and up to code.
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Pre-Approved ADU Plans in Antioch
Antioch is actively supporting ADU development and may provide pre-approved ADU plans to simplify permitting and reduce costs. These plans have already been reviewed for compliance with the city’s zoning and building standards, allowing homeowners to move forward with confidence and faster approvals.
To explore available pre-approved ADU options or find a design that best fits your lot, contact the Antioch Building and Safety Division or the Apex Homes team for expert guidance.
Why Build an ADU in Antioch?
Antioch’s growing housing demand and affordable land make it a great location to build an ADU. Homeowners can earn steady rental income while significantly increasing property value and long-term equity.
ADUs in Antioch are also a smart way to create flexible living space for family members, whether for parents, adult children, or guests. The city’s clear ADU standards and straightforward permitting process make building accessible for most homeowners.
Apex Homes builds ADUs across Antioch, offering complete design and construction services. Book a free consultation with our team to discover how an ADU can add space and value to your property.