Laguna Beach, Orange County

ADU / Guest House Cost in Laguna Beach, CA

Laguna Beach remodeling costs are 25% abovethe California state average. Here's what a typical adu / guest house costs in Laguna Beach in 2026, based on a 500 sqf project.

Budget
$156,250
$313/sqf
Mid-Range
$250,000
$500/sqf
High-End
$375,000
$750/sqf

Cost breakdown

Foundation & Framing
25%$62,500
Mechanical (HVAC, Plumbing, Electrical)
20%$50,000
Interior Finishes
20%$50,000
Exterior & Roofing
15%$37,500
Kitchen & Bath Fixtures
10%$25,000
Permits, Plans & Engineering
10%$25,000

Breakdown based on mid-range estimate of $250,000

Typical Timeline
4-8 months
Permits Required

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

Remodeling in Laguna Beach

Coastal art colony with strict design review and steep terrain. Hillside construction significantly increases costs. Marine environment and landslide zones require specialized engineering.

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 Laguna Beach

Kitchen Remodel
$37,500 – $112,500
Bathroom Remodel
$18,750 – $60,000
Room Addition
$75,000 – $206,250
Roof Replacement
$15,625 – $46,875
Exterior Paint
$6,250 – $21,875
Whole House Remodel
$337,500 – $1,125,000

ADU / Guest House cost in other California cities

Encinitas
$137,500 – $330,000 | San Diego County
Atherton
$175,000 – $420,000 | San Mateo County
Beverly Hills
$162,500 – $390,000 | Los Angeles County
Los Altos
$168,750 – $405,000 | Santa Clara County
San Diego
$125,000 – $300,000 | San Diego County
Gilroy
$131,250 – $315,000 | Santa Clara County
Irvine
$137,500 – $330,000 | Orange County
San Jose
$156,250 – $375,000 | Santa Clara County

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