Whittier, Los Angeles County

ADU / Guest House Cost in Whittier, CA

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

Budget
$118,750
$238/sqf
Mid-Range
$190,000
$380/sqf
High-End
$285,000
$570/sqf

Cost breakdown

Foundation & Framing
25%$47,500
Mechanical (HVAC, Plumbing, Electrical)
20%$38,000
Interior Finishes
20%$38,000
Exterior & Roofing
15%$28,500
Kitchen & Bath Fixtures
10%$19,000
Permits, Plans & Engineering
10%$19,000

Breakdown based on mid-range estimate of $190,000

Typical Timeline
4-8 months
Permits Required

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

Remodeling in Whittier

Historic Uptown Whittier has charming older homes with renovation potential. More affordable than West LA or South Bay. Strong local contractor community.

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 Whittier

Kitchen Remodel
$28,500 – $85,500
Bathroom Remodel
$14,250 – $45,600
Room Addition
$57,000 – $156,750
Roof Replacement
$11,875 – $35,625
Exterior Paint
$4,750 – $16,625
Whole House Remodel
$256,500 – $855,000

ADU / Guest House cost in other California cities

Hayward
$131,250 – $315,000 | Alameda County
Riverside
$106,250 – $255,000 | Riverside County
Palo Alto
$168,750 – $405,000 | Santa Clara County
Belmont
$156,250 – $375,000 | San Mateo County
Daly City
$150,000 – $360,000 | San Mateo County
Burlingame
$162,500 – $390,000 | San Mateo County
Simi Valley
$118,750 – $285,000 | Ventura County
Visalia
$93,750 – $225,000 | Tulare County

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