How Much Does an ADU Cost in El Dorado Hills?
Updated June 12, 2026 · Upside ADU
Quick answer
A detached ADU in El Dorado Hills costs about $143,750–$496,800 turnkey in 2026, or roughly $288–$414 per square foot (design, permits, and construction included). A 750 sq ft 2-bedroom unit averages $215,625–$310,500; garage conversions and Junior ADUs cost less. El Dorado Hills runs roughly 15% above the central-Sacramento baseline, driven mostly by site conditions and finish expectations in this submarket.
What does each ADU type cost in El Dorado Hills?
Price is driven first by type, because type decides how much new structure you build. The ranges below are El Dorado Hills-specific for 2026 — the regional market adjusted for this submarket's higher build costs.
El Dorado Hills ADU cost by type — 2026 turnkey ranges
| ADU type | Typical size | $ / sq ft | Turnkey range |
|---|---|---|---|
| Detached ADU | 500–1200 sq ft | $288–$414 | $143,750–$496,800 |
| Garage Conversion ADU | 380–620 sq ft | $207–$322 | $78,660–$199,640 |
| Attached ADU | 450–850 sq ft | $276–$391 | $124,200–$332,350 |
| Junior ADU (JADU) | 220–500 sq ft | $230–$368 | $50,600–$184,000 |
| Multigenerational ADU | 600–1200 sq ft | $288–$425 | $172,500–$510,600 |
See also:Upside's published pricing · ADU builder in El Dorado Hills
What does an ADU cost per square foot in El Dorado Hills?
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 El Dorado Hills pricing.
El Dorado Hills detached ADU cost by size (2026)
| Size | Typical config | $ / sq ft | Estimated turnkey |
|---|---|---|---|
| 400 sq ft | Studio / JADU | $288–$414 | $115,000–$165,600 |
| 600 sq ft | 1 bedroom | $288–$414 | $172,500–$248,400 |
| 750 sq ft | 2 bedroom | $288–$414 | $215,625–$310,500 |
| 1000 sq ft | 2–3 bedroom | $288–$414 | $287,500–$414,000 |
What drives ADU cost up or down in El Dorado Hills?
El Dorado Hills runs roughly 15% above the central-Sacramento baseline, driven mostly by site conditions and finish expectations in this submarket.
El Dorado Hills lots: Estate-sized Serrano and Marble Valley lots easily fit a full custom detached ADU, often with upscale finishes to match the main home.
Local permitting: El Dorado Hills permits through the El Dorado County Planning & Building Department, not a city counter. Gated communities like Serrano and Blackstone add HOA design review, and larger custom lots often trigger septic, well, or grading review we scope before bidding.
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 El Dorado Hills budget — get an exact, all-in number for your lot.
Free feasibility check, no commitment. We confirm site conditions, permit fees, and your build range before you sign anything.
What will an ADU in El Dorado Hills rent for, and when does it pay back?
A typical El Dorado Hills ADU rents for $2,000–$3,100 a month in 2026. Premium El Dorado Hills properties see outsized appraised-value lift from a well-built detached ADU; rents skew high but the play here is value and family use as much as cash flow. 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 El Dorado Hills ADU cost compares across the region
El Dorado Hills sits in the El Dorado 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 El Dorado Hills-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)
- El Dorado County Planning & Building Department — permits & fees — El Dorado County Planning & Building Department