Hills & Canyons · Cost

What an ADU costs in Hills & Canyons

Honest 2026 pricing for Hills & Canyons 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: $550–$800/sqft
Garage / interior conversion: $325–$475/sqft

Why Hills & Canyons prices look like this

Slope-driven foundation work commonly $80–250k above flat-lot equivalent.
Crane / pump days run 2–4× a Valley job — narrow streets and switchbacks.
Caissons on steep slopes can hit $1,500–4,000 per linear foot of depth.
Beverly Hills design review pushes cladding budgets up sharply.

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.

Reference

Terms and guides for this page

Glossary terms

BHO (Baseline Hillside Ordinance)
City of LA rules governing residential construction on hillside lots — height, grading, haul routes.
Soils Report
Engineering study of subsurface soil conditions, required for hillside and certain ADU lots.
LADBS (LA Department of Building and Safety)
The City of Los Angeles agency that issues building permits and conducts inspections.
LADWP (LA Department of Water and Power)
City of LA's water and electrical utility — handles ADU service connections and meter sets.
HPOZ (Historic Preservation Overlay Zone)
City of LA designation that imposes design review on alterations within a historic neighborhood.
Construction Loan
Short-term loan covering construction costs, converted to a permanent mortgage at completion.

Field guides

The Los Angeles ADU permit process, step by step
Permitting an ADU inside the City of Los Angeles takes about 8–11 weeks of plan check (LADBS) plus 2–4 weeks of pre-submittal prep. State law caps ministerial review at 60 days from a complete submittal. Total city + utility fees for a 700 sqft detached ADU typically run $13,000–$26,000.