Gilroy ADU Permit & Building Guide
Building an ADU in Gilroy is a smart and flexible way to expand your living space, increase property value, and generate passive income. The City of Gilroy recognizes the importance of accessory dwelling units as a tool to provide affordable housing and support multi-generational living. Whether you’re building a rental unit, a home for family members, or a long-term investment, Apex Homes helps you streamline the process—from feasibility and design to permitting and construction.
ADU Regulations in Gilroy
Gilroy allows both detached and attached ADUs, as well as Junior ADUs (JADUs), on residentially zoned lots. Homeowners in single-family zones may construct one detached or attached ADU and one JADU, while multi-family properties are permitted up to two detached or attached ADUs.
The maximum size for a detached or attached ADU is 1,000 square feet. For attached ADUs, the size must not exceed 50% of the primary dwelling’s gross floor area (excluding garages). The maximum height for an ADU in Gilroy is 16 feet.
Setbacks are straightforward: a minimum of 4 feet is required from the side and rear property lines, while front setbacks must remain outside the designated front yard setback unless needed to accommodate at least an 800-square-foot unit. These guidelines ensure privacy, maintain neighborhood character, and balance design flexibility with local zoning requirements.
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The Gilroy ADU Permitting Process
The ADU permitting process in Gilroy involves verifying zoning compliance, selecting a design that meets city requirements, and submitting a full plan package for review. Required documents typically include site plans, elevations, structural drawings, and Title 24 energy calculations.
Applications are processed through the Gilroy Building Division, with typical review times ranging from two to four months depending on project complexity. Once approved, construction can begin following permit issuance. Apex Homes assists homeowners through each step—handling design, documentation, and construction to ensure your ADU project stays on schedule and within budget.
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Pre-Approved ADU Plans in Gilroy
Gilroy may provide or accept pre-reviewed ADU plans to help streamline permitting and reduce design costs. These plans are reviewed for compliance with zoning and building codes, allowing homeowners to begin construction faster. For the most efficient approval process, Apex Homes can help you choose or adapt a pre-approved plan that fits your lot and city standards.
Why Build an ADU in Gilroy?
Gilroy’s growing population and strong housing demand make it a smart place to build an ADU. Homeowners can create additional living space that generates steady rental income while increasing long-term property value.
ADUs are also ideal for multigenerational living, providing private and comfortable space for parents, adult children, or guests. The city’s clear ADU standards, straightforward permitting process, and flexibility in design make building easier and more accessible for homeowners.
Apex Homes builds ADUs throughout Gilroy, guiding you from design to construction. Book a free one-on-one consultation to see how an ADU can maximize your property’s potential.