San Fernando Valley · FAQ
San Fernando Valley ADU questions, answered
Questions we get on almost every San Fernando Valley site walk. If yours isn't here, ask us — we answer everything before you commit.
How big can my detached ADU be in the Valley?
State law guarantees up to 1,200 sqft on a single-family lot, regardless of local FAR limits. Most Valley lots can fit a 1,000–1,200 sqft 2BR detached unit.
Do I need a Mulholland Specific Plan review?
Only if your parcel is inside the Mulholland Scenic Parkway Specific Plan boundary — primarily the south-facing ridgeline of Sherman Oaks, Encino, and Tarzana. We check the parcel on the first walk.
What does the fire-zone (VHFHSZ) requirement mean for my budget?
Chapter 7A requires ignition-resistant exterior walls, eaves, vents, and decks. Plan on $18–35k more in materials on a typical detached ADU compared to a non-fire-zone parcel.
Is there a parking requirement?
No — state law removes ADU parking within ½ mile of major transit. Most of the Valley qualifies via the Orange Line / Metro G corridor.
Can I rent the ADU short-term (Airbnb)?
City of LA prohibits short-term rental of ADUs as the primary residence carve-out. Long-term rental (30+ days) is unrestricted.