Pleasant Hill, Contra Costa County

ADU / Guest House Cost in Pleasant Hill, CA

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

Budget
$131,250
$263/sqf
Mid-Range
$210,000
$420/sqf
High-End
$315,000
$630/sqf

Cost breakdown

Foundation & Framing
25%$52,500
Mechanical (HVAC, Plumbing, Electrical)
20%$42,000
Interior Finishes
20%$42,000
Exterior & Roofing
15%$31,500
Kitchen & Bath Fixtures
10%$21,000
Permits, Plans & Engineering
10%$21,000

Breakdown based on mid-range estimate of $210,000

Typical Timeline
4-8 months
Permits Required

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

Remodeling in Pleasant Hill

Central Contra Costa location with 1960s-70s housing stock. Active remodeling market with moderate costs. Good contractor access from the 680 corridor.

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 Pleasant Hill

Kitchen Remodel
$31,500 – $94,500
Bathroom Remodel
$15,750 – $50,400
Room Addition
$63,000 – $173,250
Roof Replacement
$13,125 – $39,375
Exterior Paint
$5,250 – $18,375
Whole House Remodel
$283,500 – $945,000

ADU / Guest House cost in other California cities

Hillsborough
$175,000 – $420,000 | San Mateo County
Rancho Cucamonga
$112,500 – $270,000 | San Bernardino County
Larkspur
$156,250 – $375,000 | Marin County
Vallejo
$118,750 – $285,000 | Solano County
Redwood City
$156,250 – $375,000 | San Mateo County
Morgan Hill
$137,500 – $330,000 | Santa Clara County
Campbell
$150,000 – $360,000 | Santa Clara County
Foster City
$156,250 – $375,000 | San Mateo County

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