Benicia, Solano County

ADU / Guest House Cost in Benicia, CA

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

Budget
$125,000
$250/sqf
Mid-Range
$200,000
$400/sqf
High-End
$300,000
$600/sqf

Cost breakdown

Foundation & Framing
25%$50,000
Mechanical (HVAC, Plumbing, Electrical)
20%$40,000
Interior Finishes
20%$40,000
Exterior & Roofing
15%$30,000
Kitchen & Bath Fixtures
10%$20,000
Permits, Plans & Engineering
10%$20,000

Breakdown based on mid-range estimate of $200,000

Typical Timeline
4-8 months
Permits Required

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

Remodeling in Benicia

Charming waterfront city with historic downtown. Mix of Victorian and mid-century homes. More affordable than Marin but with similar small-town character. Straightforward permitting.

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 Benicia

Kitchen Remodel
$30,000 – $90,000
Bathroom Remodel
$15,000 – $48,000
Room Addition
$60,000 – $165,000
Roof Replacement
$12,500 – $37,500
Exterior Paint
$5,000 – $17,500
Whole House Remodel
$270,000 – $900,000

ADU / Guest House cost in other California cities

Redondo Beach
$137,500 – $330,000 | Los Angeles County
Pacifica
$150,000 – $360,000 | San Mateo County
Redwood City
$156,250 – $375,000 | San Mateo County
Santa Clara
$150,000 – $360,000 | Santa Clara County
Sunnyvale
$156,250 – $375,000 | Santa Clara County
Half Moon Bay
$150,000 – $360,000 | San Mateo County
Los Altos Hills
$175,000 – $420,000 | Santa Clara County
San Mateo
$156,250 – $375,000 | San Mateo County

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