La Jolla, San Diego County

ADU / Guest House Cost in La Jolla, CA

La Jolla remodeling costs are 20% abovethe California state average. Here's what a typical adu / guest house costs in La Jolla in 2026, based on a 500 sqf project.

Budget
$150,000
$300/sqf
Mid-Range
$240,000
$480/sqf
High-End
$360,000
$720/sqf

Cost breakdown

Foundation & Framing
25%$60,000
Mechanical (HVAC, Plumbing, Electrical)
20%$48,000
Interior Finishes
20%$48,000
Exterior & Roofing
15%$36,000
Kitchen & Bath Fixtures
10%$24,000
Permits, Plans & Engineering
10%$24,000

Breakdown based on mid-range estimate of $240,000

Typical Timeline
4-8 months
Permits Required

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

Remodeling in La Jolla

Premium San Diego coastal community with high-end renovation demand. Ocean views drive major investments in whole-house renovations. Coastal Commission oversight adds complexity for properties near the bluff.

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 La Jolla

Kitchen Remodel
$36,000 – $108,000
Bathroom Remodel
$18,000 – $57,600
Room Addition
$72,000 – $198,000
Roof Replacement
$15,000 – $45,000
Exterior Paint
$6,000 – $21,000
Whole House Remodel
$324,000 – $1,080,000

ADU / Guest House cost in other California cities

Simi Valley
$118,750 – $285,000 | Ventura County
Corte Madera
$150,000 – $360,000 | Marin County
Half Moon Bay
$150,000 – $360,000 | San Mateo County
Vallejo
$118,750 – $285,000 | Solano County
Tiburon
$168,750 – $405,000 | Marin County
Cupertino
$162,500 – $390,000 | Santa Clara County
Livermore
$131,250 – $315,000 | Alameda County
Mill Valley
$162,500 – $390,000 | Marin County

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