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 own a home in Montclair, you already know the score: the city is built out, the lots are tight, and most houses went up between the 1950s and 1970s. That means your project, whether it’s a kitchen remodel, a room addition, or a garage-to-ADU conversion, will happen on a small infill lot with older framing, plumbing, and electrical running through the walls. We’re Iron Beam Contractors, and we’ve done this work up and down 91763 long enough to know exactly what opens up when the drywall comes down. Call (833) 756-5936 for a free estimate, and we’ll walk your property before you commit to anything.
Why Iron Beam Contractors Is Montclair’s Preferred General Contractor Company
Montclair homeowners keep calling us back for one reason: we quote the job the way it actually is, not the way it looks on a sunny walkthrough. Nolan Driscoll built Iron Beam around a simple rule. Inspect first, write allowances into the contract, and price every surprise in writing before a single trade touches it. That matters on 1950s tract homes where galvanized supply lines and 60-amp panels hide behind clean stucco.
Our reputation in Montclair comes from doing the unglamorous part well. We pull permits, we schedule inspections, and we stage materials on narrow residential streets without blocking a neighbor’s driveway. The reviews from Montclair customers mention the same things: straight numbers, no change-order ambush, and a lead who answers the phone. Response time to Montclair is typically same-day for estimates, and we don’t pad a bid just because the lot is tight.
We also carry access to more than 50 vetted material brands, so a Montclair homeowner isn’t stuck with whatever the local supply house happens to stock. James Hardie siding for a re-side off Ramona Avenue, KraftMaid cabinetry for a kitchen on Kingsley Street, Tuff Shed and Plant Prefab for ADU work near the 10 Freeway. One contractor, every phase.
Styles & brands we work with
Hire a General Contractor in Montclair
You hire a General Contractor in Montclair when the project spans more than one trade and the city wants permits, inspections, and a set of plans that match what’s actually on your lot. Most of what we take on here falls into a few buckets: kitchen and bath remodels, room additions, garage conversions, and ADU construction. A kitchen remodel in Montclair typically runs $14,000 – $45,000. A finished ADU on a small lot usually lands between $90,000 – $220,000 depending on whether you’re converting an attached garage or dropping a prefab unit like Plant Prefab onto a prepared pad. Those are real numbers, not teaser bids.
Permitted Work on Postwar Lots
Montclair’s housing stock is dense, small-lot, and fully built out. That means almost every project we manage is an infill remodel or addition. The city will require plans, setbacks will be tight, and the inspector will check the work at rough-in and final. We handle all of it, and we price the permit path honestly instead of pretending it’s optional.
Inspections Before the Bid
We open the access panels, check the subfloor, scope the panel, and look for dry rot before we send a number. On a 1960s tract home off Holt Blvd, that pre-bid inspection is the difference between a contract that holds and one that falls apart at demo.
General Contractor Services in Montclair
General Contractor Services in Montclair cover the full remodel scope, not just the pretty finish work. We frame, we re-pipe, we re-wire, we re-roof, and we coordinate the trades under one contract and one point of contact. If your Montclair home needs a new kitchen and a stronger service panel, both go in the same scope of work. A bathroom remodel here typically runs $9,000 – $28,000. A home addition usually lands between $45,000 – $130,000, and a garage conversion runs $30,000 – $80,000 depending on what’s behind the walls.
ADU and Garage Conversions
Montclair’s built-out reality makes the garage-to-ADU path one of the most common projects we take on. We’ve worked with Plant Prefab and Tuff Shed, and we know the local setback constraints well enough to tell you in the first meeting whether your lot can support the unit you want.
Whole-Home and Exterior Scope
Because the dry heat and Santa Ana winds punish roofs and stucco out here, we schedule exterior work in cooler morning hours and recommend fire-resistant materials where the code allows. One contractor, every phase, from blueprint to backyard.
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.
Trusted Brands We Service in Montclair
We service the material brands Montclair homeowners actually ask for, and we keep local sourcing tight so lead times don’t kill your schedule. For exteriors, James Hardie siding holds up to the Inland Empire sun better than most wood products we’ve removed from 1960s tract homes. For kitchens, KraftMaid cabinetry gives you a specified, ordered, and installed package instead of a pile of boxes from a big-box store. For ADU work, Plant Prefab and Tuff Shed give Montclair owners a faster path to a permitted unit than stick-framing from scratch on a lot that barely fits the setbacks. Built on real brands, real standards.
Common General Contractor Problems We See in Montclair Homes
- Undersized electrical panels: A 1950s or 1960s original panel often can’t carry the load of a modern kitchen or a new ADU. We scope the panel during the pre-bid walk, not after demo.
- Galvanized plumbing behind the walls: Montclair’s older stock frequently still has original galvanized supply lines. Once the wall opens, replacing them becomes a code and insurance issue, not a preference.
- Dry rot and termite damage in framing: Small-lot tract homes with decades of flat or low-pitch roof drainage often hide damage at the sill plates and headers. We inspect before we bid.
- Tight setback staging: On lots where the side yard is barely six feet, storing framing lumber, dumpsters, and material deliveries becomes part of the plan. We stage on the street carefully and keep neighbors informed.
See the difference
Before
After
Before
After
Before
AfterPricing for General Contractor in Montclair, CA
Here are the ranges we quote most often in Montclair. They’re calibrated to the local market, not pulled from a national average. What moves the final number is what the pre-bid inspection finds: panel capacity, pipe material, framing condition, and access for equipment on a tight lot.
| Project | Typical Montclair Range |
|---|---|
| Kitchen Remodel | $14,000 – $45,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
Every estimate is free. Call (833) 756-5936 and we’ll walk the property, open the access panels, and give you a written line-item bid with allowances spelled out where the walls haven’t been opened yet.
We Also Serve Cities Near Montclair
Iron Beam Contractors serves Montclair and the surrounding Pomona Valley communities, including Claremont, Ontario, Upland, and La Verne. If your home sits in a similar 1950s – 1970s tract or an infill lot from the same postwar build-out, our General Contractor team brings the same inspection-first approach and brand access.
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
Because a 1950s – 1970s tract home in Montclair frequently hides galvanized plumbing, undersized framing, or an electrical panel that was never upgraded to current code. If your original bid didn’t include an allowance for those conditions, the extra cost arrives as a surprise change order. We inspect before the bid and write allowances into the contract for exactly this reason. Call (833) 756-5936 for an estimate that covers what’s actually behind your walls.
Yes, a garage-to-ADU conversion in Montclair requires a permit, plans that match your lot’s setbacks, and inspections at rough-in and final. The timeline matters because a failed rough-in sign-off stops the whole job until the correction is made and re-inspected. On a garage-to-ADU conversion off Holt Blvd, our crew opened the walls and found galvanized supply lines and a 60-amp panel that had to be upgraded before rough-in could pass. We wrote the panel upgrade and re-pipe as allowances in the contract, priced the change order in writing before any drywall went back up, and the homeowner walked the punch list with our lead after inspection sign-off.
We plan the staging as part of the scope, not an afterthought. On tight infill lots in Montclair, dumpsters go on the street with the city’s approval, material deliveries get scheduled in smaller loads, and framing lumber is moved through the side yard in staged sections. It’s slower than open-land construction, but it keeps the job moving and the neighbors able to use their driveways.
It means we identify the unknowns before you sign, attach a dollar amount to each one, and build that number into the contract. If we open a wall and find outdated wiring or an undersized panel, the allowance covers the repair without a surprise. Any change beyond the allowance gets priced in writing and approved by you before the work starts. Call (833) 756-5936 to see how we structure allowances on a Montclair remodel.
We walk the punch list with you at final inspection, mark every item, and fix the rework before we pull materials off the street. On a small Montclair lot, pulling the dumpster too early means paying to bring it back when a stucco patch or a door adjustment fails the walkthrough. We keep staging in place until you’ve signed off, then we clear the site in one pass.
Get Your Free Montclair Estimate
If you’re planning a remodel, addition, or ADU conversion in Montclair, start with an inspection that tells you the truth about your walls. We’ll walk the property, scope the panel, check the framing, and give you a written line-item bid with allowances where the unknowns live. Call (833) 756-5936 to schedule your free estimate.
Written by Nolan Driscoll, Owner at Iron Beam Contractors, serving Montclair and the Pomona Valley.