It started as just a dream… and now there’s a beautiful home where my grandchildren used to play.
Sylvia & Enrique
Watch their full storyADU Builder · San Bernardino County
ADU Builder in Montclair, California
Affordable, high-value ADUs in Montclair — a smart way to add income or family space.
4.9 · 26 Google reviews- All-in pricing
- Permits handled
- Design & build in-house
Built in Montclair0ADUs built in Montclair
Real local proof
ADUs we’ve built in & around Montclair
60+ completed ADUs across San Bernardino County — including projects near Montclair. Tap any for its floor plan, finishes, and timeline.
Loved by neighbors
What Montclair homeowners say
The opportunity
What an ADU returns in Montclair
Turn underused backyard into monthly income and lasting value.
Estimated monthly rent
$0–$0
per month, in Montclair
Typical value added
$0k–$0k
added to your property
No hassle, just cash flow — we handle the design, permits, and construction end to end, so your Montclair backyard starts paying you back.
Estimates only — your exact rent, value, and price come from a free property analysis.
Your next step
See what’s possible at your Montclair address
Drop in your address and we’ll show you which ADUs fit your lot, what they’d cost all-in, and what they could earn — no pressure, no obligation.
- Free, no-obligation
- Specific to your Montclair parcel
Timeline · Montclair
5.7months to a finished ADU.
The Montclair industry average is 15 months — we’re about 3× faster.
Backyard Estates5.7 mo170 days
Industry average15 mo450 days
PlansPermitsConstruction
The biggest gap is construction — the industry averages 268 days; we clear it in 50.
Industry figures: California HCD Annual Progress Report (APR) Dashboard — ADU permitting & construction timelines, self-reported by California jurisdictions and published by HCD.
Permits & fees
Red tape in Montclair, handled
Permitting an ADU touches a dozen departments and a stack of fees. We run every one — and it’s already in your fixed, all-in price.
Reviewed by the City of Montclair Planning Division
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.
Every city fee — already in your price
No surprise municipal bills. We absorb every Montclair permit and city fee into one fixed, all-in price.
- Permit & plan-check fees
- School district fees
- Utility hookups
- Fire & public works
- We run all ~11 city & county departments — plan check, building, fire, public works, utilities, and school fees.
- Our Formal Property Analysis verifies 0+ property & city items — fire sprinklers, school & plan-check fees, lot coverage, Title 24 — before we build.
Specific setbacks, fees, and overlay rules are confirmed for your exact parcel during your free Formal Property Analysis.
Choose your layout
Floor plans we build in Montclair
Every plan is all-inclusive, fully customizable, and built on your lot.
- Estate 350
- Studio
- 1 Bath
- 350 sq ft
All-in from$207,000View plan & pricing → - Estate 400
- 1 Bed
- 1 Bath
- 400 sq ft
All-in from$224,000View plan & pricing → - Estate 450
- 1 Bed
- 1 Bath
- 464 sq ft
All-in from$245,000View plan & pricing → - Estate 500
- 2 Bed
- 1 Bath
- 499 sq ft
All-in from$266,000View plan & pricing → - Estate 600
- 2 Bed
- 1 Bath
- 600 sq ft
All-in from$290,000View plan & pricing → - Estate 750
- 2 Bed
- 1 Bath
- 749 sq ft
All-in from$328,000View plan & pricing → - Estate 750+
- 2 Bed
- 2 Bath
- 749 sq ft
All-in from$338,000View plan & pricing → - Estate 800
- 2 Bed
- 2 Bath
- 800 sq ft
All-in from$353,000View plan & pricing → - Estate 950
- 3 Bed
- 2 Bath
- 947 sq ft
All-in from$395,000View plan & pricing → - Estate 1200
- 3 Bed
- 2 Bath
- 1200 sq ft
All-in from$436,000View plan & pricing →
Local know-how
Why homeowners build in Montclair
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.
Building throughout Montclair
North MontclairMontclair Place areaMission Boulevard corridor
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
Get Started
Build your ADU in Montclair
Drop in your address and we'll show you what's possible on your lot, what it costs all-in, and what it could earn — no pressure.