ADU Company in Montclair, CA
Montclair homeowners who add an ADU or remodel a kitchen are almost always working within the footprint of a 1950s – 1970s tract home on a smaller lot, which changes how we approach every job in the 91763 ZIP code. Garage conversions, above-garage units, and tight rear-yard additions dominate ADU work here, while kitchen remodels usually mean reworking an original galley layout or opening up a dated 1960s floorplan. Sunstone ADU Builders has served Montclair since 2011, handling both the structure and the interior finishes under one contract. Call (855) 949-1913 to schedule your free estimate.
Why Montclair Homes Are Different
Montclair is a small, largely built-out city in the Pomona Valley, and that single fact shapes nearly every project we take on here. There is almost no undeveloped land left, so ADU work is infill by default: attaching to an existing home, converting a garage, or building above one. Lot sizes are modest, which means setback, lot-coverage, and parking calculations with the City of Montclair’s building department decide what is actually possible before design work gets serious. The housing stock is dominated by mid-century single-family tract homes, many with detached garages along rear alleys or side driveways. That configuration makes garage-conversion and above-garage ADUs the most common and cost-effective path in Montclair. Older homes often have undersized electrical service and no room for an expanded panel, so service upgrades are a routine part of ADU scoping. The Pomona Valley’s hot, dry summers and Santa Ana wind events push us toward high-efficiency cooling, deep shade structures, and fire-resistant materials, especially near the wildland-urban edge on the city’s north side. In Montclair the classic ADU is a rear-alley garage conversion behind a 1960s ranch house, and the permitting fight is almost always about converting an existing nonconforming garage footprint without triggering a full lot-coverage or parking re-calculation with the city.
Our Main Montclair Services
These are the two projects Montclair homeowners call us about most often. Each has its own dedicated Montclair page with full detail.
ADU Builders in Montclair
Our ADU work in Montclair centers on garage conversions and above-garage units, the two configurations that fit the city’s modest lot sizes and rear-alley access. We handle permits, electrical service upgrades, the structure, and the interior finishes so the unit comes out rental-ready or move-in ready for family. We build with prefab brands like Abodu and Cover or traditional stick-built methods, depending on what the site and timeline call for. Read the full breakdown on our ADU Builders in Montclair page.
Bathroom Remodeling in Montclair
Most Montclair bathroom remodels are in homes built between the 1950s and 1970s, which usually means original cast-iron plumbing, a cramped 5×7 layout, and a single vanity. We rework the floorplan where the framing allows, replace failing drain lines, upgrade the venting, and finish with surfaces that hold up to Pomona Valley dryness. Bathroom work is often scoped alongside an ADU interior or as a companion remodel on the main house. Learn more on our Bathroom Remodeling in Montclair page.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Kitchen Remodeling in Montclair
Kitchen remodeling in Montclair usually means opening up a tight 1960s galley kitchen inside a tract home that has never been structurally touched since it was built. Most of these kitchens were designed as closed-off work rooms, so the big win is reworking the layout to connect with the living space without pushing into a yard that is already small. Montclair’s dry, hot summers also make ventilation and cooling choices matter more than in coastal neighborhoods, and older homes here often need an electrical panel upgrade before any new appliance line runs. Our Kitchen Remodeling work covers the full interior scope, so the same crew that builds the ADU shell finishes the kitchen inside it.
Galley Kitchen Opening
Signs you need it
A narrow kitchen where two people cannot pass each other, zero sightline to the dining area, and cabinets that dead-end at the refrigerator are all signals the original 1960s layout is holding the house back.
What it costs in Montclair
Opening a galley kitchen with a load-bearing beam, layout rework, and new cabinetry typically runs $38,000 – $68,000 in Montclair, with the higher end tied to structural steel and panel upgrades.
How we do it
We confirm which walls are bearing, size the beam, reroute plumbing and electrical inside the new footprint, set the updated cabinet run, and finish with counters and surfaces that match the home’s mid-century bones or a clean modern look.
Full Kitchen Replacement
Signs you need it
Cabinet frames pulling apart, laminate counters delaminating, a vent hood that recirculates into the room, and outlets that cannot support a modern appliance lineup mean a full replacement beats patching.
What it costs in Montclair
A full kitchen teardown and replacement in Montclair generally runs $65,000 – $95,000 depending on cabinet quality, appliance count, floor repair, and whether the panel needs upgrading.
How we do it
We demo to the studs, update framing and subfloor where needed, run new electrical and plumbing, install cabinets, counters, appliances, and finishes, and leave you with a working kitchen and a written line-item scope.
What Kitchen Remodeling Costs in Montclair
| Item | Typical range in Montclair |
|---|---|
| Galley kitchen opening with beam and rework | $38,000 – $68,000 |
| Full cabinet and counter replacement | $28,000 – $48,000 |
| Full kitchen teardown and replacement | $65,000 – $95,000 |
Will the price change once work starts in Montclair?
No, not on our jobs. We write fixed line-item quotes after checking the existing framing, plumbing, and electrical panel in your Montclair home, so surprises surface before the contract, not during it.
Get an exact number by calling (855) 949-1913.
Do you pull the permits for a Montclair kitchen remodel?
Yes. We submit the drawings, pull the permits, and manage the City of Montclair inspections, including any required electrical panel or ventilation reviews.
Call (855) 949-1913 to talk through your kitchen.
Brands We Service in Montclair
We specify and install James Hardie fiber cement siding across Montclair ADU projects for its fire- and moisture-resistant durability, and we build and install units from prefab brands including Abodu, Cover, and Tuff Shed-style structures. Parts and materials are sourced through our supplier network to keep Montclair lead times predictable. See the full list on our brands page.
Pricing for ADU Company in Montclair, CA
| Service | Typical range in Montclair |
|---|---|
| Galley kitchen opening with beam and layout rework | $38,000 – $68,000 |
| Full cabinet and counter replacement | $28,000 – $48,000 |
| Full kitchen teardown and replacement | $65,000 – $95,000 |
In Montclair, prices move up when a 1960s home needs an electrical panel upgrade, when a load-bearing wall requires a steel beam, or when the existing slab reveals damage after demo. We give you a written fixed price up front so the number does not drift after work begins. Call (855) 949-1913 for a free estimate.
Neighborhoods We Serve in Montclair
Most of our Montclair work happens in the single-family tract neighborhoods south of the 10 and around the Montclair Place corridor, plus the older blocks near Mission Boulevard. We regularly work in:
- South Montclair neighborhoods south of the 10
- Zona Blanca and the older central tracts
- Northeast Montclair near the wildland edge
- Alley-fronting blocks west of Central Avenue
Montclair is a compact city, so our crews can typically reach any job in the 91763 ZIP within a working day.
Service Area – Cities Near Montclair
Beyond Montclair, we take on ADU and kitchen projects across the Pomona Valley. Homeowners in Claremont, CA often have larger lots with older single-family homes, while Ontario, CA jobs tend toward mid-century tracts similar to Montclair. Upland, CA and La Verne, CA both sit close by and bring their own mix of older homes and infill ADU work. If you are anywhere in the valley, call (855) 949-1913 and we will tell you whether your project fits our schedule.
Serving Montclair, CA — Our Local Coverage Area
We’re based in the Montclair area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs About ADU Company in Montclair
Start timing depends mostly on the City of Montclair permit queue, not on our crew availability. Once plans are approved, our scheduling is usually two to four weeks out. Call (855) 949-1913 for a current estimate.
Yes. We prepare the plans, submit for review, respond to corrections, and manage inspections through the City of Montclair building department. Most Montclair ADUs need careful setback, lot-coverage, and parking documentation because lots are small and the city is largely built out.
Yes. That is the whole point of our setup: the shell, the kitchen, and the bathroom are all finished by our in-house team under one contract, so you are not hiring a second contractor after the structure is up.
Call (855) 949-1913 to schedule your free estimate in Montclair.
What happens when you call
- 1A real person answersNo phone trees — talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you — the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Montclair Customers Say
"The kitchenette layout he suggested made better use of the space than the one on our original sketch."
— Beatriz Garcia"Detached unit in the back yard. Utilities trenched, separate meter, and it passed final on the first inspection."
— Reggie Ellison"Knew the local setback and parking rules cold, which saved us from designing something that would never have been approved."
— Doug Padgett