How Much Does an ADU Cost in Carmichael?
Updated June 12, 2026 · Upside ADU
Quick answer
A detached ADU in Carmichael costs about $127,500–$440,640 turnkey in 2026, or roughly $255–$367 per square foot (design, permits, and construction included). A 750 sq ft 2-bedroom unit averages $191,250–$275,400; garage conversions and Junior ADUs cost less. Carmichael runs roughly 2% above the central-Sacramento baseline, driven mostly by site conditions and finish expectations in this submarket.
What does each ADU type cost in Carmichael?
Price is driven first by type, because type decides how much new structure you build. The ranges below are Carmichael-specific for 2026 — the regional market adjusted for this submarket's higher build costs.
Carmichael ADU cost by type — 2026 turnkey ranges
| ADU type | Typical size | $ / sq ft | Turnkey range |
|---|---|---|---|
| Detached ADU | 500–1200 sq ft | $255–$367 | $127,500–$440,640 |
| Garage Conversion ADU | 380–620 sq ft | $184–$286 | $69,768–$177,072 |
| Attached ADU | 450–850 sq ft | $245–$347 | $110,160–$294,780 |
| Junior ADU (JADU) | 220–500 sq ft | $204–$326 | $44,880–$163,200 |
| Multigenerational ADU | 600–1200 sq ft | $255–$377 | $153,000–$452,880 |
See also:Upside's published pricing · ADU builder in Carmichael
What does an ADU cost per square foot in Carmichael?
Smaller units cost more per foot — fixed costs like a kitchen, bath, utility hookup, and permit spread across fewer square feet. Here is a detached build at Carmichael pricing.
Carmichael detached ADU cost by size (2026)
| Size | Typical config | $ / sq ft | Estimated turnkey |
|---|---|---|---|
| 400 sq ft | Studio / JADU | $255–$367 | $102,000–$146,880 |
| 600 sq ft | 1 bedroom | $255–$367 | $153,000–$220,320 |
| 750 sq ft | 2 bedroom | $255–$367 | $191,250–$275,400 |
| 1000 sq ft | 2–3 bedroom | $255–$367 | $255,000–$367,200 |
What drives ADU cost up or down in Carmichael?
Carmichael runs roughly 2% above the central-Sacramento baseline, driven mostly by site conditions and finish expectations in this submarket.
Carmichael lots: Deep, mature-tree lots in Del Dayo and Old Carmichael easily fit a detached ADU set well back from the main home.
Local permitting: Carmichael is unincorporated Sacramento County, so ADUs permit through the County Building Permits & Inspection Division, not a city. County setbacks run 4 ft side/rear; older detached garages near the American River often need fire-separation and egress upgrades when converted.
The single biggest cost lever is size: keeping a unit under 750 sq ft exempts it from local impact fees. Site conditions (slope, soil, utility runs) and finish level move the rest.
Know your Carmichael budget — get an exact, all-in number for your lot.
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What will an ADU in Carmichael rent for, and when does it pay back?
A typical Carmichael ADU rents for $1,600–$2,700 a month in 2026. Large lots near the American River support spacious detached and multigenerational units; Del Dayo and Old Carmichael command premium rents for the area. Run your specific numbers with the calculator below, or see the full payback math in the ROI guide.
Tools & guides:ADU cost calculator · ROI & rent estimator · ADU rental income & ROI guide
How Carmichael ADU cost compares across the region
Carmichael sits in the Sacramento County market. The regional baseline is central Sacramento; foothill and estate submarkets (El Dorado Hills, Granite Bay, Folsom) run highest, while Galt, Woodland, and Citrus Heights run lowest. For the full regional cost breakdown and methodology, see our Sacramento ADU cost guide, or compare every city on the ADU cost by city index.
Figures are 2026 Carmichael-area market estimates, not a fixed quote. Your exact price depends on your lot, design, and finish level — we confirm it with a free feasibility check.
Sources & references
- Accessory Dwelling Units — official guidance — California Dept. of Housing & Community Development (HCD)
- Sacramento County Building Permits & Inspection Division — permits & fees — Sacramento County Building Permits & Inspection Division