Murrieta, CA Permit Requirements: Renovation Permits (2026)

Riverside County requires building permits for most renovation work that goes beyond purely cosmetic changes. Exempt projects include: painting, wallpapering, tiling, carpeting, installing flooring, replacing cabinets, installing counter tops, and other finish work that does not involve changes to walls, plumbing, mechanical, or electrical systems. All of the following require permits: structural modifications (removing or adding walls, enlarging openings), electrical work (adding circuits, upgrading panels, new outlets), plumbing work (moving or adding fixtures, water heater replacement), mechanical work (HVAC installation or replacement), re-roofing when more than 25% of total roof area is affected, window or door replacement that changes the size of the opening, and adding square footage (room additions). Riverside County Building and Safety accepts permit applications online through their portal or at counter locations. Plan review timelines vary: simple residential projects may be approved over the counter, while more complex renovations requiring plan check typically take 2–4 weeks. Inspections are required at various stages of construction. In the Coachella Valley and other desert areas, energy efficiency requirements under California Title 24 are particularly stringent due to extreme heat, affecting window, insulation, and HVAC specifications for renovations.