ADU Cost Per Square Foot Calculator
Estimate your ADU build cost using a cost-per-square-foot range based on project type, size, and finish level in Southern California.
ADU Cost Per Square Foot in Southern California (2026)
| Project Type | Standard Finish | Premium Finish |
|---|---|---|
| Garage Conversion ADU | $150–$200/sq ft | $200–$280/sq ft |
| New Construction ADU | $200–$280/sq ft | $280–$380/sq ft |
| Junior ADU (JADU) | $100–$175/sq ft | $175–$250/sq ft |
| 2-Story New Construction | $250–$320/sq ft | $320–$420/sq ft |
Estimates only. Costs vary based on site conditions, location, permit fees, and specifications. Every Vision ADU estimate is itemized and based on a real site visit — not a per-sqft guess.
What's Included in Vision ADU's Standard Build
- Tex-Cote 25-year exterior coating
- Owens Corning 50-year roofing (Preferred Contractor)
- Anlin Double Lifetime Warranty windows
- Solid birch wood cabinets
- Stone Polymer Composite (SPC) flooring
- Quartz countertops
- Full permitting and inspections
Get a real, itemized estimate for your ADU
Not a per-sqft range — a written, line-by-line cost estimate based on your actual property.
Book Free Consultation (866) 668-4264