Calabasas, Los Angeles County

ADU / Guest House Cost in Calabasas, CA

Calabasas remodeling costs are 15% abovethe California state average. Here's what a typical adu / guest house costs in Calabasas in 2026, based on a 500 sqf project.

Budget
$143,750
$288/sqf
Mid-Range
$230,000
$460/sqf
High-End
$345,000
$690/sqf

Cost breakdown

Foundation & Framing
25%$57,500
Mechanical (HVAC, Plumbing, Electrical)
20%$46,000
Interior Finishes
20%$46,000
Exterior & Roofing
15%$34,500
Kitchen & Bath Fixtures
10%$23,000
Permits, Plans & Engineering
10%$23,000

Breakdown based on mid-range estimate of $230,000

Typical Timeline
4-8 months
Permits Required

Building, electrical, plumbing, mechanical. May require plan check.

Remodeling in Calabasas

Upscale suburban community with large homes. Many gated communities with HOA requirements. Fire risk in hillside areas adds defensible space and fire-resistant material requirements.

California allows ADUs on most residential lots since 2020. An ADU adds living space and rental income. Cities must approve or deny within 60 days of a complete application.

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Other projects in Calabasas

Kitchen Remodel
$34,500 – $103,500
Bathroom Remodel
$17,250 – $55,200
Room Addition
$69,000 – $189,750
Roof Replacement
$14,375 – $43,125
Exterior Paint
$5,750 – $20,125
Whole House Remodel
$310,500 – $1,035,000

ADU / Guest House cost in other California cities

San Marcos
$118,750 – $285,000 | San Diego County
Lake Forest
$131,250 – $315,000 | Orange County
Vacaville
$112,500 – $270,000 | Solano County
Laguna Beach
$156,250 – $375,000 | Orange County
Beverly Hills
$162,500 – $390,000 | Los Angeles County
Riverside
$106,250 – $255,000 | Riverside County
Hillsborough
$175,000 – $420,000 | San Mateo County
Danville
$150,000 – $360,000 | Contra Costa County

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