Loomis is a small, rural-character town in Placer County known for its large lots, equestrian properties, and excellent schools. The generous lot sizes make Loomis one of the best communities in the region for detached ADU construction.
$750,000
Median Home Price
0.5–2+ acres
Avg. Lot Size
$1,800–$2,800/mo
Est. ADU Rent
60 days (state-mandated)
Permit Timeline
$6,000–$18,000
Permit Cost
1,200 sq ft (detached)
Max ADU Size
Loomis's large lots are its biggest advantage for ADU construction. You can build a full 1,200 sq ft detached unit with a separate entrance, driveway, and yard — essentially a standalone rental home. The main consideration is septic capacity, which should be evaluated before committing to plans.
Key rules and requirements for building an ADU in Loomis, Placer County.
Evaluate septic capacity first — this is the most common issue for Loomis ADUs
Large lots allow for detached ADUs with separate driveways, maximizing rental appeal
Consider a barn-style or farmhouse ADU design to match Loomis's rural aesthetic
The Loomis Basin area has some of the largest lots — ideal for premium ADUs
15 builders found
Design-build firm with 10+ years experience. Serves Rocklin, Loomis, and surrounding Placer County.
Full-service design-build firm in Auburn. Extensive experience with ADUs and custom homes.
Offers ADU financing and incentives guidance.
30+ years of experience. Based in Loomis, serving all of Placer County.
Established 2011. Local Loomis builder specializing in custom ADUs and renovations.
35+ years combined experience. Serves Rocklin, Penryn, and greater Placer County.
Loomis is located in Placer County with a population of 7,000+ and a median home price of $750,000. The average lot size of 0.5–2+ acres provides good space for ADU construction, with estimated rental income of $1,800–$2,800/mo for completed units.
ADU permits in Loomis are processed through Placer County with a state-mandated maximum timeline of 60 days. Permit costs typically range from $6,000–$18,000, and the maximum allowed ADU size is 1,200 sq ft (detached). Our directory helps you find experienced builders who know the local regulations and can guide you through the entire process.