What an ADU Really Costs in Sacramento
ADU pricing is usually quoted per square foot, and it's important to separate two numbers. "Construction cost" alone averages around $300 per square foot in Sacramento (roughly $200 to $450+ depending on complexity). "Turnkey cost" — which bundles design, engineering, permits, fees and construction into one number — generally runs about $250 to $360 per square foot. Turnkey is the figure that matters for your budget, because it's what you'll actually pay to go from idea to a finished, permitted unit.
Typical Sacramento ADU Pricing
The figures below are general 2026 market ranges to help you budget. Your exact price depends on size, ADU type, finishes and site conditions.
Ranges are estimates for planning only. Get a real ballpark for your lot →
What Drives the Price Up or Down
- ADU type — a garage conversion or JADU reuses an existing structure and costs less than a from-scratch detached build.
- Size and finishes — more square footage and higher-end kitchens, baths and materials raise the total.
- Site conditions — slope, poor soil, large tree removal, or a long utility run to the new unit push toward the high end.
- Utilities — extending water, sewer and electrical (and any panel upgrade) is a real line item, especially for detached units far from the house.
- Plans — a city pre-approved plan is cheaper and faster than a fully custom design.
The Fees You Should Know About
Beyond construction, budget for design/engineering, city plan check and permit fees, and utility connection costs. The good news: California has cut fees for smaller units — impact fees are waived for ADUs under 750 sq ft, and recent law reduced school fees for units under 500 sq ft. We lay out every cost line at the consultation so there are no surprises.
Does the Money Make Sense?
For many owners, yes. A Sacramento ADU commonly rents for about $1,500 to $2,200 a month, so the unit can offset a meaningful share of its cost over time while adding lasting property value — see our note on financing and ROI. And plenty of ADUs are built for family rather than income, where the value is having aging parents or adult kids close by. Either way, the smartest first step is a free consultation with real numbers for your specific property.