Loomis, CA · Placer County
Attached ADU in Loomis
Upside ADU builds attached adus in Loomis, Placer County, for a $1,000 deposit with transparent fixed pricing and inspection-tied payments. A typical Loomis attached adu runs $113,400–$303,450 all-in, and we permit it through the Town of Loomis / Placer County Building Division end to end.
Loomis rules that affect a attached adu
In Loomis, 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 Town of Loomis / Placer County Building Division reviews it as new attached square footage.
Local permitting: Loomis reviews ADUs through the Town of Loomis with Placer County building support. Rural-residential zoning means larger minimum lots, frequent septic and well systems, and tree-protection review — all of which we scope before pricing a detached build.
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 Loomis homeowners pick Upside
- $1,000 deposit — the CA legal max
- Inspection-tied milestone payments
- We know the Town of Loomis / Placer County Building Division process
- Transparent, all-in Loomis pricing
- Property-manager referral when you rent
Loomis 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 $252–$357 per square foot, or $113,400–$303,450 for a finished, permitted unit. A typical Loomis attached adu rents for $1,700–$2,700 a month.
| Size | Typical use | Loomis all-in cost (2026) |
|---|---|---|
| 450 sq ft | Studio / 1-bed, max cash-on-cash | $113,400–$160,650 |
| 650 sq ft | 1–2 bed, most popular | $163,800–$232,050 |
| 850 sq ft | 2–3 bed / multigen, max value | $214,200–$303,450 |
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
$252–$357 / 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 Loomis
Loomis lots suit a guest house as readily as a rental — acre-plus parcels in central Loomis and toward Penryn give privacy to spare for a detached unit. Septic, well, and tree-protection review come standard on rural-residential parcels here. 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 Loomis — FAQs
A attached adu in Loomis typically runs $113,400–$303,450 turnkey in 2026, based on $252–$357 per square foot for the Placer County market. We confirm your exact number with a free feasibility check.
Loomis attached adu permits are handled by the Town of Loomis / Placer County Building Division. Loomis reviews ADUs through the Town of Loomis with Placer County building support. Rural-residential zoning means larger minimum lots, frequent septic and well systems, and tree-protection review — all of which we scope before pricing a detached build. We prepare and submit the full package and manage inspections.
A attached adu in Loomis rents for about $1,700–$2,700 a month in 2026 depending on size and finish. Loomis's premium rural-residential character supports higher-end finishes and strong resale value, so the play leans toward guest homes and value-add over pure 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 Loomis
ADU services in Loomis
Upside models for Attached ADU
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Not sure which type fits your lot? See all ADU services in Loomis or compare every build type on our ADU services hub.
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