ADU cost calculator
What will my LA ADU cost?
Adjust the inputs to see permit, design, construction, and soft costs for your specific scenario. Coefficients are LA-market averages — actual contractor bids vary by ±20%.
Your project
YOU-ADU is a fixed 455 sqft Lehrer Architects design — not adjustable. Pick another plan path to change size.
Budget (laminate, basic appliances)
Estimated total
$89,400 – $128,200
Permits + design + construction + soft costs
Breakdown
- Permits & fees
- $4,500 – $9,500
- Design / plans
- $0 – $500
- Construction
- $81,900 – $109,200
- Soft costs (engineering, surveys, utilities)
- $3,000 – $9,000
Approximations only — real contractor bids vary ±20% based on site conditions, finishes, and contractor pricing. Always get 3 bids before signing anything.
Estimate look off?
Hillside grading, post-fire rebuild premiums, prefab vs site-built — chat with us about what's driving your numbers.