Eastvale, CA Accessory Structures: Garage Conversions (2026)

Eastvale treats garage conversions differently depending on the new use. Converting an existing garage into an accessory dwelling unit is processed ministerially under Zoning Code Section 120.04.010, consistent with California ADU law (Gov. Code 66310-66342). For a garage-to-ADU conversion, no setback is required beyond the existing structure and, importantly, the city cannot require replacement of the parking spaces lost in the conversion. This makes a garage conversion one of the easiest ADU pathways in Eastvale. By contrast, converting a garage into general living space (a bedroom, office, or family room that is not a permitted ADU) is constrained by the city's parking standards in Section 120.05.060, which require two off-street parking spaces per dwelling unit provided within a garage, carport, or other permanent weather-protective structure, and prohibit required parking in the front or street-side yard setback. Eliminating a required covered space without providing a conforming replacement would create a parking deficiency and typically will not be approved. All garage conversions require building permits from the Eastvale Community Development Department and must meet California Building Code requirements for habitable space, including ceiling height, light, ventilation, egress, and energy standards. Owners should confirm whether their conversion qualifies as an ADU (preferred for parking relief) or a room addition before applying.