El Dorado Hills, CA · El Dorado County
Attached ADU in El Dorado Hills
Upside ADU builds attached adus in El Dorado Hills, El Dorado County, for a $1,000 deposit with transparent fixed pricing and inspection-tied payments. A typical El Dorado Hills attached adu runs $124,200–$332,350 all-in, and we permit it through the El Dorado County Planning & Building Department end to end.
El Dorado Hills rules that affect a attached adu
In El Dorado Hills, an attached unit shares a wall and utility runs with your main home, which can cut trenching and site costs — useful on tighter lots where a fully detached build would crowd the yard. The El Dorado County Planning & Building Department reviews it as new attached square footage.
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.
That's the attached adu-specific picture. For the full El Dorado County rulebook — every setback, height, and owner-occupancy detail — see our Sacramento-region ADU rules guide, and learn how the build type works statewide on our attached adu page.
Why El Dorado Hills homeowners pick Upside
- $1,000 deposit — the CA legal max
- Inspection-tied milestone payments
- We know the El Dorado County Planning & Building Department process
- Transparent, all-in El Dorado Hills pricing
- Property-manager referral when you rent
El Dorado Hills attached adu cost snapshot
An attached ADU connects to your existing house but functions as a fully separate dwelling. It shares utilities and a wall, which can reduce site and trenching costs versus a detached build. In the El Dorado County market that prices out to about $276–$391 per square foot, or $124,200–$332,350 for a finished, permitted unit. A typical El Dorado Hills attached adu rents for $2,000–$3,100 a month.
| Size | Typical use | El Dorado Hills all-in cost (2026) |
|---|---|---|
| 450 sq ft | Studio / 1-bed, max cash-on-cash | $124,200–$175,950 |
| 650 sq ft | 1–2 bed, most popular | $179,400–$254,150 |
| 850 sq ft | 2–3 bed / multigen, max value | $234,600–$332,350 |
Dial in your own number with the ADU cost calculator.
Estimate your ADU
Ballpark 2026 turnkey cost, financing, and rental return for your area.
Estimated turnkey cost
$276–$391 / sq ft · incl. design, permits & construction
Estimates only — 2026 regional ranges, not a bid. Your real price depends on site conditions, finishes, and your lot. We confirm with a free feasibility check.
Attached ADU projects in El Dorado Hills
El Dorado Hills lots are custom by default — Serrano and Blackstone sit behind gated-community design committees that expect the ADU finish to match a high-end main house. Estate parcels run on septic, so capacity gets checked before siting anything. Every attached adu is fixed-price, funded on inspection-passed milestones, and backed by our written guarantee.
Browse finished builds and specs in our ADU project gallery.
Attached ADU in El Dorado Hills — FAQs
A attached adu in El Dorado Hills typically runs $124,200–$332,350 turnkey in 2026, based on $276–$391 per square foot for the El Dorado County market. We confirm your exact number with a free feasibility check.
El Dorado Hills attached adu permits are handled by the El Dorado County Planning & Building Department. 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. We prepare and submit the full package and manage inspections.
A attached adu in El Dorado Hills rents for about $2,000–$3,100 a month in 2026 depending on size and finish. 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.
An attached ADU shares at least one wall with your main house; a detached ADU is a standalone structure. Attached units can be cheaper to build (shared utilities, less site work) while detached units typically rent higher and add more resale value.
Attached ADU near El Dorado Hills
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Not sure which type fits your lot? See all ADU services in El Dorado Hills or compare every build type on our ADU services hub.
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