Folsom · Sacramento & El Dorado County
Build an ADU in Folsom, CA
Folsom sits on the Sacramento / El Dorado county line, so the permit pathway depends on which side of the line your lot is on. We build on both. Pick your county below to start your free feasibility check.
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Sacramento County vs. El Dorado County
A Folsom address can fall under either jurisdiction. Sacramento County applies the City of Folsom's adopted ADU ordinance for most parcels inside city limits. Parcels in the El Dorado Hills / unincorporated stretch follow El Dorado County's rules. We handle filings, plan check, and inspections in both — pick your county in the selector above and we'll confirm what's allowed on your specific lot.
Why Folsom lots work well for detached ADUs
Folsom's newer neighborhoods — Empire Ranch, Broadstone, the Folsom Ranch master plan — tend to have larger lots than older Sacramento infill. That means more room for a true detached ADU with privacy from the main house, parking, and a real backyard for each unit. Owners of older Folsom homes near the historic district often go the garage-conversion route instead.
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