Corona, Riverside County

ADU / Guest House Cost in Corona, CA

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

Budget
$112,500
$225/sqf
Mid-Range
$180,000
$360/sqf
High-End
$270,000
$540/sqf

Cost breakdown

Foundation & Framing
25%$45,000
Mechanical (HVAC, Plumbing, Electrical)
20%$36,000
Interior Finishes
20%$36,000
Exterior & Roofing
15%$27,000
Kitchen & Bath Fixtures
10%$18,000
Permits, Plans & Engineering
10%$18,000

Breakdown based on mid-range estimate of $180,000

Typical Timeline
4-8 months
Permits Required

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

Remodeling in Corona

Suburban community with mostly 1990s-2010s homes. Remodels tend to be kitchen and bathroom upgrades. Costs are moderate for Southern California.

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 Corona

Kitchen Remodel
$27,000 – $81,000
Bathroom Remodel
$13,500 – $43,200
Room Addition
$54,000 – $148,500
Roof Replacement
$11,250 – $33,750
Exterior Paint
$4,500 – $15,750
Whole House Remodel
$243,000 – $810,000

ADU / Guest House cost in other California cities

Pasadena
$137,500 – $330,000 | Los Angeles County
Morgan Hill
$137,500 – $330,000 | Santa Clara County
Livermore
$131,250 – $315,000 | Alameda County
Palo Alto
$168,750 – $405,000 | Santa Clara County
Los Altos
$168,750 – $405,000 | Santa Clara County
Campbell
$150,000 – $360,000 | Santa Clara County
Concord
$125,000 – $300,000 | Contra Costa County
Dublin
$137,500 – $330,000 | Alameda County

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