ADU Cost Calculator v2

What size ADU are you planning to build?

Small studio / conversion (under 400 sq ft)

One-bedroom detached ADU (400–600 sq ft)

Two-bedroom or large detached ADU (600+ sq ft)

What level of interior finishes do you prefer?

Basic, builder-grade finishes

Mid-range semi-custom finishes

High-end custom finishes throughout

What type of kitchen will the ADU include?

Compact kitchenette

Full mid-range kitchen

Luxury kitchen with premium appliances

How many bathrooms will the ADU have?

One small bathroom

One spacious or upgraded bathroom

Two bathrooms

Will you need a new foundation or major structural work?

No, existing foundation is adequate

Minor foundation or slab work

New foundation or extensive structural work

What level of plumbing installation is required?

Minimal (ties into existing lines)

Moderate (new lines to the unit)

Extensive new plumbing system

What electrical upgrades are needed for the ADU?

Basic outlets and lighting

New sub-panel and full wiring

Major service upgrade to main panel

Do you plan to include energy-efficient features?

Standard code-compliant insulation/windows

High-efficiency HVAC and upgraded insulation

Net-zero or solar-ready package

What type of site preparation or demolition is required?

Minimal cleanup or grading

Standard demo and site prep

Extensive demolition or major grading

ADU Cost Estimator