ADU Builder · San Bernardino County
ADU Builder in Montclair, California
Affordable, high-value ADUs in Montclair — a smart way to add income or family space.
- 3 mi from our Upland office
- 1 completed nearby
- All-in pricing
Montclair sits right between Upland and the LA County line, and its practical, well-sized lots make it a great value for an ADU. Homeowners here are often building to bring family closer — a son near his mother, a multigenerational household under one property — exactly the kind of project our Montclair customers have loved.
With easy access to the 10 and the Montclair Transit Center, an ADU here is attractive both for family living and as a rental, since transit proximity can remove added parking requirements. We design compact, efficient plans that make the most of Montclair’s lots without overbuilding.
Three miles from our office, Montclair projects get quick, hands-on attention.
Real local proof
ADUs we’ve built in and around Montclair
Completed accessory dwelling units near Montclair — not renderings. Walk through the details and the homeowners’ own stories.
Local know-how
ADU rules & permits in Montclair
Reviewed by the City of Montclair Planning Division
Backyard Estates handles the entire permitting process for you. Here’s what California’s statewide ADU law means for your Montclair property:
- California law requires cities to approve a complete ADU application ministerially (no public hearing) within 60 days.
- Detached ADUs up to 800 sq ft with 4-foot side and rear setbacks must be allowed by right, and most lots qualify for an ADU up to 1,200 sq ft.
- No additional off-street parking can be required when the property is within half a mile of public transit.
- Owner-occupancy cannot be required for ADUs permitted through the end of 2025, making an ADU a true rental-income option.
Specific setbacks, fees, and overlay rules are confirmed for your exact parcel during your Formal Property Analysis.
Choose your layout
ADU floor plans available in Montclair
Good to know
Montclair ADU questions, answered
Montclair’s lot values and transit access make ADUs an efficient way to add rental income or multigenerational living space. Backyard Estates builds with all-in pricing so you know your total cost before you start.
Not if your property is within half a mile of public transit, such as the Montclair Transit Center — California law removes the added-parking requirement in that case. We confirm this for your parcel during your analysis.
The City of Montclair Planning Division handles ADU review. Backyard Estates manages the entire permitting process for you.
Keep exploring
Nearby areas we build in
Build your ADU in Montclair
Start with a free office visit. We pull up your property, show you what's possible, and give you a clear, all-in path forward — no pressure.