El Dorado County, California
ADU Builder in El Dorado Hills
Upside ADU is a El Dorado Hills ADU builder serving all of El Dorado County. We design, permit, and build all 5 ADU types — detached, garage conversion, attached, junior, and multigenerational — for a $1,000 deposit, with transparent fixed pricing. Permits run through the El Dorado County Planning & Building Department, which we handle end to end.
Your El Dorado Hills ADU builder — from design to move-in
Premium El Dorado Hills properties see strong appraised-value lift from well-built detached ADUs.
We build every type of ADU in El Dorado Hills with one transparent, all-in price and a $1,000 deposit — the California legal maximum — then tie the rest of your payments to inspection-passed milestones so money only moves when verified work is done. When it's ready to rent, we'll connect you with a trusted local property manager.
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.
Popular El Dorado Hills areas: Serrano, Blackstone, Marble Valley, Town Center.
- $1,000 deposit — the CA legal max
- Inspection-tied milestone payments
- All 5 ADU types built here
- Property-manager referral when you rent
El Dorado Hills ADU rules & limits
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.
Statewide, every El Dorado Hills ADU under 750 sq ft is exempt from impact fees, detached units can reach 1,200 sq ft, and no replacement parking is required when you convert a garage. For the full El Dorado County rulebook — setbacks, height, and owner-occupancy by ADU type — see our Sacramento-region ADU rules & setbacks guide.
ADU services in El Dorado Hills
El Dorado Hills ADU cost & ROI
El Dorado Hills ADUs run about $143,750–$496,800 all-in in 2026, and a typical unit rents for $2,000–$3,100 a month. 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.
See the full El Dorado Hills ADU cost breakdown by type and size, run your own numbers with the ADU cost calculator, or see the full payback and rent-comp math in our ADU rental income & ROI guide.
Estimate your ADU
Ballpark 2026 turnkey cost, financing, and rental return for your area.
Estimated turnkey cost
$288–$414 / 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.
Permitting & timeline in El Dorado Hills
El Dorado Hills ADU permits are issued by the El Dorado County Planning & Building Department, since this area is unincorporated and reviewed at the county level. California law requires a decision within 60 days of a complete submittal, and pre-approved plan sets can shorten review to about 30 days. We prepare the full package, pull the permit, and manage every inspection so you never stand in line at a counter.
Plan on roughly 6–9 months end to end for a detached build: about 2–6 weeks of design, 4–10 weeks of permitting, and 12–16 weeks of construction. Garage conversions and junior ADUs move faster.
The Upside Guarantee
Your money is protected at every step
Sacramento homeowners were burned by builders who took huge deposits and vanished. We built Upside to be the opposite — structured so you're protected before, during, and after the build.
$1,000 down — the legal maximum
California caps a contractor's down payment at $1,000 or 10% of the contract — whichever is less. On an ADU that's $1,000, not the 30–50% other builders demanded. Everything after is earned.
Inspection-tied milestone draws
After the deposit you pay in defined draws — design, permit, foundation, framing, MEP, drywall, completion — each released only after that phase passes inspection.
Honest capacity & timelines
We only take on work we can actually deliver, with realistic schedules and references to completed local projects you can visit.
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 build is fixed-price, inspection-milestone funded, and backed by our written guarantee.
See completed builds, specs, and before-and-after photos in our Sacramento-region ADU project gallery.
ADUs in El Dorado Hills — FAQs
Most El Dorado Hills ADUs cost $143,750–$496,800 in 2026 depending on size and type, or roughly $288–$414 per square foot. A 750 sq ft detached unit runs about $215,625–$310,500 turnkey, with design, permits, and construction included.
El Dorado Hills ADU permits run through 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.
A typical El Dorado Hills ADU rents for about $2,000–$3,100 a month in 2026, with detached and larger units at the top of that range. 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.
We're an ADU builder, not a property manager — but once it's built we'll connect you with vetted El Dorado County property managers we trust to lease and run it for you. Plenty of owners self-manage instead.
Nearby service areas
Popular ADU models
Costs & rules in El Dorado Hills
Start your El Dorado Hills ADU
Get a transparent quote and a free feasibility check for your El Dorado Hills lot.