Newark, Alameda County

ADU / Guest House Cost in Newark, CA

Newark remodeling costs are 10% abovethe California state average. Here's what a typical adu / guest house costs in Newark in 2026, based on a 500 sqf project.

Budget
$137,500
$275/sqf
Mid-Range
$220,000
$440/sqf
High-End
$330,000
$660/sqf

Cost breakdown

Foundation & Framing
25%$55,000
Mechanical (HVAC, Plumbing, Electrical)
20%$44,000
Interior Finishes
20%$44,000
Exterior & Roofing
15%$33,000
Kitchen & Bath Fixtures
10%$22,000
Permits, Plans & Engineering
10%$22,000

Breakdown based on mid-range estimate of $220,000

Typical Timeline
4-8 months
Permits Required

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

Remodeling in Newark

Small East Bay city with affordable housing relative to neighbors. Many tract homes from the 1960s-70s being updated. New development in the Dumbarton area is raising property values.

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.

Have estimates for your Newark project?

Upload them and get an AI-powered comparison with CSLB license verification. Free.

Compare Estimates →

Other projects in Newark

Kitchen Remodel
$33,000 – $99,000
Bathroom Remodel
$16,500 – $52,800
Room Addition
$66,000 – $181,500
Roof Replacement
$13,750 – $41,250
Exterior Paint
$5,500 – $19,250
Whole House Remodel
$297,000 – $990,000

ADU / Guest House cost in other California cities

Foster City
$156,250 – $375,000 | San Mateo County
Orinda
$156,250 – $375,000 | Contra Costa County
Pittsburg
$118,750 – $285,000 | Contra Costa County
Los Altos Hills
$175,000 – $420,000 | Santa Clara County
Hillsborough
$175,000 – $420,000 | San Mateo County
San Luis Obispo
$131,250 – $315,000 | San Luis Obispo County
Alameda
$143,750 – $345,000 | Alameda County
Chula Vista
$118,750 – $285,000 | San Diego County

Get a personalized estimate

Use our interactive cost estimator to adjust square footage and see detailed pricing for your specific project.

Open Cost Estimator →