detached ADU builder
Detached ADU builder in Sacramento
A detached ADU is a standalone new structure built in your yard, fully separated from the main house, with its own foundation, entrance, kitchen, and bathroom. It is the only ADU type that adds entirely new square footage as an independent building, and it carries the highest rent and resale lift of any ADU.
What a Detached ADU is
A detached ADU is the flagship of the five build types — a true second home on your lot. Because it stands alone, you get the most design freedom, the quietest separation between households, and the strongest appraised-value gain. It is also the most involved build, since everything (foundation, framing, utilities) starts from scratch. Sacramento's deep lots in neighborhoods like Land Park, Tahoe Park, and the older grids of East Sac and Curtis Park are well suited to a freestanding unit at the back of the yard, accessed off the alley or down the side setback. For homeowners with usable rear-yard space, a detached ADU is almost always the highest cash-on-cash and highest resale option.
Best for: Rental income, multigenerational living, and maximum resale value.
Not what you need?
These build types are easy to confuse. Here's where to go instead:
- Garage conversion ADU →
Already have a garage to reuse? Converting it is cheaper than building new.
- Attached ADU →
Tight on yard space? An attached unit shares a wall and saves on site work.
- Junior ADU (JADU) →
Want the lowest-cost legal unit inside your existing home? A JADU fits in the footprint.
Who a Detached ADU is best for
What's included
- Up to 1,200 sq ft, 1–3 bedrooms
- Independent entrance, kitchen, and full bath
- Highest appraised-value lift of any ADU type
- Eligible for separate metering and condo conversion (AB 1033)
How we build your detached adu
This is the build sequence specific to a detached adu. For what working with Upside feels like start to finish, see how it works.
- Step 01
Site & feasibility check
We confirm setbacks, utility tie-in points, soils, and the largest footprint your lot allows before you commit to a design.
- Step 02
Design & engineering
We lock the floor plan, structural plans, and Title-24 energy package, then finalize a fixed, all-in scope.
- Step 03
New foundation & utilities
Detached units need their own slab or raised foundation plus trenched water, sewer, and electrical runs from the main service — the step that separates a detached build from a conversion.
- Step 04
Framing to finish
Framing, roofing, MEP rough-in, insulation, drywall, cabinets, and finishes — built to the same standard as the main house.
- Step 05
Inspections & handoff
We pass each milestone inspection (tied to your draw schedule), pull the final, and hand you a rent-ready, separately addressable home.
Size & layout options
- Up to 1,200 sq ft by state law; most Sacramento detached builds land at 500–900 sq ft
- Studio, 1-bed, 2-bed, and 3-bed layouts — 2-bed/1-bath is the most-rented configuration
- Single-story is standard; two-story is possible on tight lots to preserve yard space
- Vaulted ceilings, separate HVAC, and separate metering are all available
Want pre-designed floor plans with fixed pricing? Browse our ADU models.
What a detached adu costs in Sacramento
A detached adu in the Sacramento region typically runs $125,000–$432,000 turnkey in 2026, or roughly $250–$360 per square foot with design, permits, and construction included. Detached units run the widest band because everything is new construction — foundation, framing, roof, and a trenched utility run all start from zero. Building under 750 sq ft keeps you exempt from impact fees, the single biggest lever on cost-per-rental-dollar, and the reason many Sacramento owners size a 2-bed right up to ~749 sq ft. Site conditions move the number most: a long trench across the yard, a panel upgrade, or limited equipment access add cost a flat per-sq-ft quote hides.
| Configuration | Typical size | All-in 2026 cost |
|---|---|---|
| Studio / 1-bed | ~500 sq ft | $165,000 – $230,000 |
| 2-bed / 1-bath | ~750 sq ft | $230,000 – $300,000 |
| 2–3 bed | 1,000–1,200 sq ft | $320,000 – $500,000 |
See our full published ADU pricing and what's included, or estimate your specific cost. For a market-wide breakdown, read how much an ADU costs in Sacramento.
Estimate your ADU
Ballpark 2026 turnkey cost, financing, and rental return for your area.
Estimated turnkey cost
$250–$360 / 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.
Detached ADU timeline
Plan on roughly 6–9 months: 2–6 weeks of design, 4–10 weeks of permitting (as fast as ~30 days with the City of Sacramento's pre-approved plans), and 12–16 weeks of construction. New foundation and utility work make detached the longest of the build types.
Permitting notes for this type
Detached ADUs up to 1,200 sq ft are allowed statewide, units under 750 sq ft are exempt from impact fees, and they do not trigger an owner-occupancy requirement the way a JADU can. Height and setback limits still apply by jurisdiction.
Full local rules: Sacramento ADU rules, setbacks & permits · 2026 California ADU law
What to watch for with a detached adu
Utility capacity
Many older Sacramento homes still run a 100-amp main panel, which often needs an upgrade to 200 amps to serve a separate unit. We check this in the feasibility step so it is priced in, not a surprise.
Yard access for equipment
On the narrow side yards common in East Sac, Midtown, and Oak Park, getting concrete trucks, a pump, and framing lumber to a backyard build can be the tightest constraint. Tight access adds labor and sometimes a crane day, which we scope up front.
Tree and sewer line location
Sacramento's mature heritage trees and the existing sewer lateral can dictate where the unit sits and the trenching path. Protected-tree drip lines and the lateral's depth are both worth confirming before design locks.
Detached ADU FAQs
Yes. A detached ADU is fully independent new square footage, so it adds the most appraised value and rents higher than attached, garage-conversion, or junior units. It is also eligible for separate metering and, under AB 1033, condo conversion for a future separate sale.
After required setbacks (typically 4 ft from side and rear lot lines), most lots need roughly 400–600 sq ft of clear rear or side yard for a usable unit. We run a free feasibility check to confirm the largest footprint your specific lot allows.
Yes. California lets most single-family lots add one detached ADU plus one JADU within the main house. Pairing the two is a common Sacramento strategy to maximize rental income on a single property.
A detached ADU in the Sacramento region typically runs $165,000–$500,000 in 2026, or roughly $250–$360 per square foot turnkey (design, permits, and construction included). A 750 sq ft 2-bed/1-bath lands around $230,000–$300,000 at mid-range finishes.
State law allows detached ADUs up to 1,200 sq ft. Units under 750 sq ft are exempt from impact fees, which is why many Sacramento homeowners build right at that threshold for the best cost-per-rental-dollar.
Plan on about 6–9 months end to end: 2–6 weeks design, 4–10 weeks permitting (as fast as 30 days with pre-approved plans), and 12–16 weeks construction.
Upside models for Detached ADU
Plan & price your build
ADU services in Sacramento
Explore other ADU types
Ready to build your detached adu?
Get a transparent, all-in detached adu quote and a free feasibility check for your Sacramento-region lot.