ADU Tips, Costs & Regulations in Los Angeles

Four new California ADU laws take effect in 2027. Here’s what the 2027 ADU regulations mean for homeowners and investors: two detached ADUs under AB 956, lower impact fees on larger ADUs under SB 1117, tighter plan checks under AB 1621, and smoother SB 9 projects under AB 2601. Plus two honorable mentions.

Can California's SB9 law turn a single-family property into a high-performing investment? In this Los Angeles case study, we break down how one property was transformed from a single home into a four-unit income-producing asset generating $15,300 per month in rental income. Learn how the SB9 Duplex Provision, ADU development, and strategic site planning helped maximize cash flow, increase property value, and create a projected 20% cash-on-cash return.