Placer County, California
ADU Builder in Granite Bay
Upside ADU is a Granite Bay ADU builder serving all of Placer 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 Placer County Community Development Resource Agency, which we handle end to end.
Your Granite Bay ADU builder — from design to move-in
High property values mean Granite Bay ADUs deliver outsized appraised-value gains.
We build every type of ADU in Granite Bay 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.
Granite Bay lots: Los Lagos and Granite Bay Hills estate parcels easily accommodate a large custom detached ADU matched to the main home's finish level.
Popular Granite Bay areas: Los Lagos, Granite Bay Hills, Eureka.
- $1,000 deposit — the CA legal max
- Inspection-tied milestone payments
- All 5 ADU types built here
- Property-manager referral when you rent
Granite Bay ADU rules & limits
Granite Bay is unincorporated Placer County, permitting through the Community Development Resource Agency. Estate lots are large but often on septic with HOA design review (Los Lagos), so custom detached ADUs with upscale finishes are the norm and septic capacity is checked early.
Statewide, every Granite Bay 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 Placer County rulebook — setbacks, height, and owner-occupancy by ADU type — see our Sacramento-region ADU rules & setbacks guide.
ADU services in Granite Bay
Granite Bay ADU cost & ROI
Granite Bay ADUs run about $147,500–$509,760 all-in in 2026, and a typical unit rents for $2,000–$3,200 a month. High property values mean Granite Bay ADUs deliver outsized appraised-value gains; the typical owner is building for family or value-add rather than maximizing rent.
See the full Granite Bay 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
$295–$425 / 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 Granite Bay
Granite Bay ADU permits are issued by the Placer County Community Development Resource Agency, 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 Granite Bay
Granite Bay is custom-estate territory — Los Lagos and Granite Bay Hills lots call for a detached unit that reads like part of the main home. Most parcels are on septic, so capacity gets confirmed early and the design routes through HOA review. 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 Granite Bay — FAQs
Most Granite Bay ADUs cost $147,500–$509,760 in 2026 depending on size and type, or roughly $295–$425 per square foot. A 750 sq ft detached unit runs about $221,250–$318,600 turnkey, with design, permits, and construction included.
Granite Bay ADU permits run through the Placer County Community Development Resource Agency. Granite Bay is unincorporated Placer County, permitting through the Community Development Resource Agency. Estate lots are large but often on septic with HOA design review (Los Lagos), so custom detached ADUs with upscale finishes are the norm and septic capacity is checked early.
A typical Granite Bay ADU rents for about $2,000–$3,200 a month in 2026, with detached and larger units at the top of that range. High property values mean Granite Bay ADUs deliver outsized appraised-value gains; the typical owner is building for family or value-add rather than maximizing rent.
We're an ADU builder, not a property manager — but once it's built we'll connect you with vetted Placer 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 Granite Bay
Start your Granite Bay ADU
Get a transparent quote and a free feasibility check for your Granite Bay lot.