Roseville, CA · Placer County
Attached ADU in Roseville
Upside ADU builds attached adus in Roseville, Placer County, for a $1,000 deposit with transparent fixed pricing and inspection-tied payments. A typical Roseville attached adu runs $116,640–$312,120 all-in, and we permit it through the City of Roseville Development Services end to end.
Roseville rules that affect a attached adu
In Roseville, 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 City of Roseville Development Services reviews it as new attached square footage.
Local permitting: Roseville reviews ADUs at its own Development Services counter under Placer County rules — a different submittal path than the City of Sacramento. Expect 4 ft side/rear setbacks, a 16 ft height limit, and HOA architectural review in master-planned tracts like Fiddyment Farm and Sun City.
That's the attached adu-specific picture. For the full Placer 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 Roseville homeowners pick Upside
- $1,000 deposit — the CA legal max
- Inspection-tied milestone payments
- We know the City of Roseville Development Services process
- Transparent, all-in Roseville pricing
- Property-manager referral when you rent
Roseville 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 Placer County market that prices out to about $259–$367 per square foot, or $116,640–$312,120 for a finished, permitted unit. A typical Roseville attached adu rents for $1,800–$2,900 a month.
| Size | Typical use | Roseville all-in cost (2026) |
|---|---|---|
| 450 sq ft | Studio / 1-bed, max cash-on-cash | $116,640–$165,240 |
| 650 sq ft | 1–2 bed, most popular | $168,480–$238,680 |
| 850 sq ft | 2–3 bed / multigen, max value | $220,320–$312,120 |
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
$259–$367 / 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 Roseville
The Roseville wrinkle is two reviews running in parallel: the city's Development Services plan check and the HOA's architectural committee in tracts like Fiddyment Farm and Highland Reserve. Diamond Oaks and older central lots skip the HOA step, so siting there is simpler. 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 Roseville — FAQs
A attached adu in Roseville typically runs $116,640–$312,120 turnkey in 2026, based on $259–$367 per square foot for the Placer County market. We confirm your exact number with a free feasibility check.
Roseville attached adu permits are handled by the City of Roseville Development Services (Placer County). Roseville reviews ADUs at its own Development Services counter under Placer County rules — a different submittal path than the City of Sacramento. Expect 4 ft side/rear setbacks, a 16 ft height limit, and HOA architectural review in master-planned tracts like Fiddyment Farm and Sun City. We prepare and submit the full package and manage inspections.
A attached adu in Roseville rents for about $1,800–$2,900 a month in 2026 depending on size and finish. Top-rated schools and high owner-occupancy push Roseville toward premium long-term rentals and multigenerational use; value-lift at resale is among the strongest in Placer County.
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 Roseville
ADU services in Roseville
Upside models for Attached ADU
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