ADU Builder in Granite Bay, CA
A second home on the lot you already own. Large estate lots and acreage — where a detached second dwelling is an amenity, not a compromise.
See your ADU in 3D before we build — now $1,500 off your design.
Or call (916) 671-0802 — free site assessment, no obligation.
Your ADU options
What we build in Granite Bay
Detached ADU — up to 1,200 sq ft. A standalone second home on your lot, with its own entrance, kitchen and bath. The most private option and the strongest for rental income or multigenerational living.
Attached ADU. Shares a wall with your main house, which keeps foundation and utility costs down. Often the most budget-efficient route to a full second dwelling.
Garage conversion. Turns square footage you already have into a legal, permitted living space. Typically the fastest path to rental income, since the shell already exists.
Junior ADU — up to 500 sq ft. Built within your home’s existing footprint. Ideal for an in-law suite, a home office, or a first step into an ADU without reshaping the lot.
Purpose-built leisure space. Golf simulators, home gyms, theatre rooms and studios — designed around ceiling height, power and sound from the first concept rather than retrofitted after.
Siting an ADU on a Granite Bay lot
Estate lots change what’s possible. Granite Bay parcels are frequently an acre or more, which removes most of the siting constraints that limit ADUs elsewhere. A 1,200 sq ft detached build can sit genuinely apart from the main house — its own drive, its own entry, real separation rather than a unit tucked against a fence line.
Septic and well are the real variables. Many Granite Bay properties are on septic, and adding a dwelling means the system has to support it — sometimes an expansion, sometimes a new leach field. Properties on well water need capacity confirmed too. These are the two items that move a Granite Bay ADU budget most, and we assess both before you commit to a design.
Recent projects
Placerville, CA
Granite Bay permits — through Placer County
Unincorporated — no city hall. Granite Bay projects run through Placer County, a different process with its own requirements.
We work in that system constantly. Site planning, engineering, Title 24 and permitting from our Loomis office — including well and septic considerations.
Unincorporated — there is no city hall. Granite Bay is not an incorporated city, so your ADU is reviewed by Placer County, not a municipal planning counter. It is a different process with its own submittal requirements, and we work in that system constantly from our Loomis office ten minutes away.
Finish level matters here. Granite Bay homes set a high standard, and an ADU that doesn’t match the main house reads as an outbuilding rather than an asset. We specify materials and rooflines to match from the first 3D concept.
What a Granite Bay ADU costs
$150,000 – $400,000. Garage conversions start lower. Large detached units with custom finishes run higher.
See the 2026 ADU cost guide, or get a real number for your lot with a free site assessment.
What our clients say
Built by neighbors
Next door in Loomis. CSLB #1030793, licensed and insured.
One crew, start to finish. Design through keys — no handoffs, no subcontractor roulette.
See it first. Full 3D before we break ground.
Get your free Granite Bay site assessment
Tell us about your lot. We’ll confirm what Granite Bay allows, flag the cost drivers, and sketch a first concept — free.
Prefer to talk? Call (916) 671-0802.
CA licensed & insured · CSLB #1030793 · Family-owned in Loomis