Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
Driveway & pavers
FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable General Contractor Across Montclair
If you’re planning a remodel, addition, or exterior overhaul in Montclair, you need a general contractor who knows that a house off Ramona Avenue and one near the 10 freeway can require completely different engineering. Alder Contractors, led by Nelson Ibarra, has spent years working across Montclair’s 91763 zip code, and we understand the older ranch tracts, the infill lots, and the newer dense housing that all sit within blocks of each other here. That local knowledge matters when a quote includes the right footing details, the right wind-load specs, and the right heat-rated materials. Call us at (833) 467-7020 to schedule your free estimate.
Why Alder Contractors Is Montclair’s Preferred General Contractor Company
Montclair homeowners call us because we don’t treat every house like it was built last year. The Montclair market is mixed: single-story stucco ranch tracts from the 1950s and 60s, post-1980s infill near Holt Boulevard, and newer apartment density along the 10. Each era has its own framing, slab depth, and drainage behavior. We quote accordingly.
Our work in Montclair consistently earns strong reviews from customers who appreciate straight answers about engineering, permits, and real timelines. When a homeowner off Holt needed an addition engineered to the original lot grade rather than the newer subdivision standard down the street, we handled the grading detail, the permit set, and the inspection sign-off under one contract. That’s the kind of local project knowledge that doesn’t show up in a generic bid.
We’re a General Contractor team that reaches Montclair quickly when site visits and permit runs are needed. Nelson Ibarra and our crew know the city’s building department expectations and the inspectors who cover the Inland Empire’s older tract neighborhoods.
Styles & brands we work with
General Contractor Services in Montclair
General Contractor Services in Montclair span everything from opening up a 1960s ranch kitchen to adding a permitted room that has to respect the original slab-on-grade footings. If you own a 1950s-era rancher off Ramona or a later infill home near Holt, the work usually means coordinating framing, plumbing, electrical, stucco, and roofing under one permit set. Home additions in Montclair typically run $45,000 – $130,000 depending on size, foundation work, and whether the existing slab requires grading correction.
Whole-Home Remodel and Room Addition
A whole-home remodel in Montclair usually means matching materials and details across multiple construction eras. We open walls, verify what’s actually in the framing, then build to a single architectural plan. Kitchen remodels range $14,000 – $45,000, while bathrooms run $9,000 – $28,000.
Garage Conversion and ADU Construction
Garage conversions in Montclair run $30,000 – $80,000, and they’re popular because older ranch tracts have oversized two-car garages that already sit on slab. ADU construction ranges $90,000 – $220,000. Both require engineering that accounts for Montclair’s older lot drainage patterns, especially off Holt and Ramona.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Construction Company in Montclair
As a Construction Company serving Montclair, we take on projects that demand licensed trades coordination across multiple phases, from foundation to finish. When you need a roof replacement, impact windows, a paver driveway, or a full addition, one contract and one point of accountability keeps the permit process moving. Roof replacement in Montclair runs $8,000 – $20,000, and impact window installation ranges $8,000 – $25,000 depending on the opening count and prevailing wind exposure on your lot.
Exterior Replacement and Hardscape
Montclair’s intense summer heat and Santa Ana winds punish exterior materials quickly. We spec stucco and roofing adhesives rated for 100°F+ afternoons, and we schedule concrete pours before midday so the cure holds. Paver patios range $3,500 – $11,000, and driveway replacements run $5,000 – $14,000.
Fencing and Deck Construction
Vinyl fencing in Montclair runs $3,500 – $9,000, while aluminum runs $4,000 – $10,000. We source through manufacturers like Master Halco and Jerith so the same crew handles the fence, the gate, and the hardscape without a separate vendor schedule.
Trusted Brands We Service in Montclair
When we build in Montclair, we pull from a portfolio of more than 50 name-brand material partners so you’re never stuck with one price point or one style. For pavers and hardscape, we work with Techo-Bloc, Unilock, and Tremron. For roofing, windows, and exterior systems, we use GAF, CertainTeed, Owens Corning, and PGT. For kitchens and baths, we can spec Cambria quartz countertops, Kohler or Grohe fixtures, and KraftMaid or Wellborn cabinetry. Having those brands already vetted means your Montclair project gets real material choices without the designer middleman, and our local crews keep turnaround tight because we know which distributors stock for the Inland Empire market.
Common General Contractor Problems We See in Montclair Homes
- Shallow footings on older ranch lots. Homes off Ramona and Holt were slab-on-grade with shallow footings set to older grading patterns. Adding a room or patio cover without engineering to that historic grade leads to permit rejection or, worse, drainage problems later.
- Wind-load ratings left out of cheap quotes. Santa Ana winds hit Montclair’s east-west streets hard. A low bid that skips documented wind-load ratings on roofing underlayment, fasteners, and windows leaves you holding the insurance paperwork gap after a storm.
- Heat damage from bad scheduling. Stucco, adhesives, and exterior paint applied on 100°F+ afternoons without wind-dust adjustments crack and fail within a season. We see “fixes” quoted as punch list items when they should have been prevented.
- Mixed-era framing mismatches. A single job frequently touches 1950s ranch framing, 1980s infill, and newer dense housing methods in one permit set. Contractors who don’t work Montclair regularly misjudge what’s behind the walls.
See the difference
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After
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AfterPricing for General Contractor in Montclair, CA
Montclair pricing reflects the engineering demands of older ranch tracts and the heat-rated material specs the local climate requires. A typical home addition runs $45,000 – $130,000, and the spread depends on whether we’re matching an existing slab or correcting old lot drainage. Here’s what current Montclair market rates look like:
| Project Type | Typical Montclair Range |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Roof Replacement | $8,000 – $20,000 |
| Impact Window Installation | $8,000 – $25,000 |
| Garage Conversion | $30,000 – $80,000 |
We provide free estimates with written line-item quotes so you can see exactly what engineering, permits, materials, and labor cost in Montclair. Call (833) 467-7020 to schedule yours.
We Also Serve Cities Near Montclair
Our crews work throughout the western Inland Empire, and we regularly serve Claremont, Ontario, Upland, and La Verne as well as Montclair. If your project is in one of those neighboring cities, the same licensed team and brand portfolio applies. Call (833) 467-7020 and tell us the address and scope, and we’ll set up a site visit at no charge.
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 General Contractor in Montclair
Yes, and specifically on the 1950s – 60s ranch tracts off Ramona and Holt. Those homes were built slab-on-grade with shallow footings set to older grading and drainage patterns. Any room addition or attached patio cover has to be engineered against the historic lot grade, not the post-1980s infill standard used blocks away near the 10. On a ranch tract off Ramona, we opened a load-bearing wall between the kitchen and a back bedroom and found the original slab draining toward the house instead of away. We engineered the addition against that lot grade, spec’d stucco and roofing adhesives rated for 100°F+ afternoons, and scheduled concrete pours before the midday heat so the cure held. Punch list closed clean at inspection sign-off, and the homeowner had the compliance documentation in hand for her insurer. Call (833) 467-7020 for an exact quote on your lot.
They determine when certain materials go in. Stucco, roofing adhesive, and exterior paint should not be applied during the hottest part of a 100°F+ afternoon, because they cure too fast and crack. Santa Ana winds also kick up dust that contaminates wet finishes. We schedule pours and coatings around the heat, and we spec products rated for the western Inland Empire’s temperature swings. Call (833) 467-7020 for a schedule that respects the weather.
A compliant Montclair quote includes the engineered footing and grading detail on older ranch lots, documented wind-load ratings for roofing underlayment, fasteners, and impact windows, and a permit set that matches the actual era of your home’s construction. The cheap quote skips those and calls the resulting cracks and adhesion failures a punch list item instead of a redo. That’s the difference in cost between quotes, and it shows up at inspection sign-off. Call (833) 467-7020 for a line-item quote.
Yes. When an insurer sees a permit set with wind-load ratings, inspection sign-off records, and the engineering detail for your addition or patio cover, the claim process moves faster and the premium conversation changes. Without that documentation, you’re arguing from a blank page after Santa Ana wind damage. We hand you the compliance file at close out for exactly that reason. Call (833) 467-7020 to talk about your project.
Yes, and that’s exactly what we do in Montclair. A single permit set can span 1950s ranch framing, 1980s infill, and newer dense housing details if the contractor documents each condition correctly. Most of the work is in the field notes and engineering callouts, not in adding separate permits. Call (833) 467-7020 and we’ll walk your scope through the city’s process.
Get Your Montclair Project Started
Call Alder Contractors at (833) 467-7020 to schedule your free estimate in Montclair. We’ll walk the site, review your scope, and give you a written quote with real numbers for engineering, permits, materials, and labor. One contractor from roofline to backyard, built to your budget and documented for your insurer.
Written by Nelson Ibarra, Owner at Alder Contractors, serving Montclair and the western Inland Empire with licensed general contracting, whole-home remodeling, and ADU construction.