Honest 2026 pricing for San Fernando Valley ADU projects. These ranges are installed cost — design, permit, construction, and standard finishes — based on jobs we've actually closed in this market.
Installed cost ranges
Detached new-build
$400–$525/sqft
Garage / interior conversion
$240–$350/sqft
Why San Fernando Valley prices look like this
☐Most predictable cost in our service area — flat lots, easy crane / concrete access.
☐Chapter 7A fire-rated assemblies add $18–35k in materials on VHFHSZ parcels.
☐Mulholland Specific Plan parcels add design + filing fees, not construction cost.
☐LADWP service drop runs $4–12k depending on existing main panel.
How to read these numbers
These are total installed $/sqft, not just construction. The detached range assumes a clean 600–900 sqft new-build with mid-range finishes. Conversions price lower because the shell already exists — most cost lives in plumbing, electrical, and the kitchen. Move outside these ranges and we'll tell you why before you sign anything.