San Luis Obispo, San Luis Obispo County

ADU / Guest House Cost in San Luis Obispo, CA

San Luis Obispo remodeling costs are nearthe California state average. Here's what a typical adu / guest house costs in San Luis Obispo 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 San Luis Obispo

Central Coast college town with charming architecture. Mix of historic and mid-century homes. Small contractor market - book early. The city's building department is straightforward.

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 San Luis Obispo

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

Corte Madera
$150,000 – $360,000 | Marin County
Oceanside
$125,000 – $300,000 | San Diego County
San Francisco
$168,750 – $405,000 | San Francisco County
Sausalito
$162,500 – $390,000 | Marin County
Long Beach
$125,000 – $300,000 | Los Angeles County
Half Moon Bay
$150,000 – $360,000 | San Mateo County
Beverly Hills
$162,500 – $390,000 | Los Angeles County
Arcadia
$137,500 – $330,000 | Los Angeles County

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