Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable General Contractor Across Montclair
You’re searching for a general contractor in Montclair, CA because you have a project that matters, and you need someone who will show up, put the price in writing, and stand behind the work. Mason Remodeling serves Montclair homeowners with kitchen remodels, bath renovations, room additions, and whole-home projects, with a written price before any tool is unpacked and a 365-day promise on completed work. If you’re planning a remodel on one of Montclair’s many 1950s or 1960s slab-on-grade homes, you’re dealing with specific construction realities that a contractor from outside the area might miss. Call (803) 680-2547 to talk through your project and get a free estimate.
Why Mason Remodeling Is Montclair’s Preferred General Contractor Company
We’ve been building and remodeling since 2004 as part of the Threshold Group family, and the standard we hold in Montclair is the same one we hold everywhere: every crew member is background-checked, identity-verified, and introduced to you by name and photo before they step through your door. That matters in Montclair, where homeowners often work during the day and might have a spouse, parent, or teenager home alone when the crew arrives. You’ll know exactly who is coming, what they look like, and that they carry a photo ID badge that matches the name we sent you.
Our Montclair customers tell us the two things they value most are the written price and the follow-through. A kitchen or bath remodel here often involves cutting into a concrete slab, and that’s where less careful contractors create surprises. We document the scope, confirm where utilities and post-tension cables run, and give you a line-item price before we start. If something isn’t right within 365 days of completion, we make it right at no cost to you. That’s the 365-Day Done Right Promise, and it applies to every general contracting project we complete in Montclair.
Styles & brands we work with
Remodeling Contractor in Montclair
A remodeling contractor in Montclair handles the structural and finish work involved in reconfiguring kitchens, bathrooms, laundry rooms, and living spaces in homes that were mostly built between the 1950s and 1970s. In this city, that almost always means working on a slab foundation, which changes how plumbing moves, how electrical runs, and how long the rough-in phase takes. A typical General Contractor scope in Montclair ranges from a single-room refresh to a full interior gut, with kitchen remodels running $14,000 – $45,000 and bathroom remodels $9,000 – $28,000 depending on footprint, finishes, and structural work.
Slab Foundation Remodels
Most Montclair homes sit directly on concrete, not over a basement or crawlspace. When you move a sink, add an island, or convert a tub to a walk-in shower, the drain lines have to be relocated through the slab. We core or trench carefully, confirm where any post-tension cables run before cutting, and re-pour to match the existing floor plane. This is ordinary work for us, but it’s where a wrong bid will break your budget if the contractor didn’t plan for it.
Written Change-Order Process
Every Montclair project gets a written scope and a written allowances sheet before demo starts. If you select a Cambria or Silestone countertop that exceeds the allowance, you’ll see that number on paper before we order it. There are no verbal surprises, and the price never grows because someone forgot to write something down.
Licensed General Contractor in Montclair
A licensed general contractor in Montclair is the party of record on your permit, the one who schedules inspections with the city, and the one accountable for code compliance on structural, electrical, plumbing, and mechanical work. When you hire Mason Remodeling, you’re hiring a licensed contractor who pulls permits on work that requires them, schedules and passes inspections, and closes out the job with final sign-off before we invoice the last draw. Home additions in Montclair typically run $45,000 – $130,000, and ADU construction $90,000 – $220,000, with the permit and inspection sequence built directly into the schedule.
Permits and Inspections
Montclair requires permits for structural changes, electrical work, plumbing relocations, and most additions or conversions. We handle the entire sequence: plan submittal where required, scheduling the rough inspection, and closing out with final. Skipping the permit might feel faster, but it creates a real problem at resale when the city flags unpermitted work and the project has to be opened up.
Load-Bearing and Structural Changes
When a Montclair homeowner wants to open a wall between a kitchen and dining room, that wall is often holding up the roof framing. We size and install engineered headers, shore the load properly during demo, and make sure the finished opening is safe and code-compliant. This is one of the most common structural scopes we handle in the city’s 1960s-era ranch homes.
Trusted Brands We Service in Montclair
We work with specification-grade material lines that are available locally and backed by real warranties, including cabinetry from KraftMaid and Wellborn, surfaces from Cambria and Silestone, and fixtures from Kohler, Moen, and Toto. For Montclair homeowners exploring a prefabricated or panelized ADU, we’re familiar with the Mighty Buildings and Dvele systems and can assess whether your lot and foundation are suited to that approach. We don’t push one brand over another; we help you choose materials that fit your budget, your timeline, and the way your family actually lives.
See the difference
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After
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After
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AfterCommon General Contractor Problems We See in Montclair Homes
- Post-tension slab strikes during drain relocation. Many Montclair slabs contain tensioned cables, and a contractor who doesn’t confirm their location before cutting can hit one, triggering an expensive repair and a blown budget. We locate and mark before we core or trench.
- Unpermitted interior work surfacing at resale. A title company or city inspection flags electrical or structural changes that were never permitted, and the seller has to open up walls to prove the work is safe. We permit from the start.
- Allowance surprises on finishes. A contractor quotes a number without a written allowances sheet, and the homeowner’s selected countertop or cabinet line comes in over the allowance mid-job, stalling the project over money. Our allowances are written down and signed before demo day.
- Concrete floor patching that telegraphs through new flooring. When a slab trench is re-poured poorly, the patch line shows through tile or LVP within a year. We re-pour and finish slab patches to accept the new floor without a visible seam.
Pricing for General Contractor in Montclair, CA
These are the current market ranges we quote for Montclair projects. They reflect local labor, permit fees, and the slab-on-grade conditions common across the city. The number that matters is your written price, which you’ll get before work starts.
| 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 |
| Cabinet Installation | $4,000 – $13,000 |
| Countertop Installation | $2,000 – $6,500 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Roof Replacement | $8,000 – $20,000 |
| Window Replacement | $4,500 – $15,000 |
What moves the price on a Montclair job is usually the slab work, the finish selections, and whether load-bearing changes are involved. You’ll see every line item before you sign. Call (803) 680-2547 for a free estimate and a written price.
We Also Serve Cities Near Montclair
Our crews work throughout the Pomona Valley and the surrounding inland corridor, including Claremont, Ontario, Pomona, and La Verne. If you’re just outside Montclair, the same written-price standard and 365-day promise apply. You can read more about our service area on our Montclair page or call us directly to confirm coverage.
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, if you’re moving plumbing, changing electrical circuits, modifying load-bearing walls, or changing the footprint, you need a permit in Montclair, and we pull it for you. Cosmetic work like cabinet replacement, countertops, and painting typically does not require a permit, but anything structural or mechanical does. Call (803) 680-2547 and we’ll tell you exactly which scope in your project triggers a permit and which doesn’t.
The two biggest cost drivers are slab trenching for drain relocation and waterproofing the shower assembly. Moving a drain line in a concrete slab adds labor, concrete cutting, and re-pour time that a home with a crawlspace would avoid. A walk-in shower installation in Montclair runs $4,500 – $12,000, and a full bathroom remodel $9,000 – $28,000 depending on size and finishes.
A kitchen or bath remodel in Montclair typically takes 4 – 8 weeks from contract signing to final inspection, with slab work adding about a week compared to a home with a basement or crawlspace. Larger projects like additions and ADUs run 3 – 6 months. We’ll give you a written schedule with milestones before we start, and you’ll always know what’s happening that week.
Yes, garage conversions are among the most popular projects we handle in Montclair, and they typically run $30,000 – $80,000 for a permitted conversion with insulation, electrical, plumbing, and finishes. The city’s ADU rules allow conversions where the existing structure meets setbacks, and we handle the plan review and inspection sequence. A new detached ADU on a Montclair lot typically runs $90,000 – $220,000.
Before any work begins, you should have a written scope of work, a written allowances sheet for finishes, a payment schedule tied to milestones, and the permit paperwork filed or ready to file. Mason Remodeling gives you all of this before demo day, and our 365-Day Done Right Promise covers completed work for a full year from the completion date. Call (803) 680-2547 to get your written price.
Written by Isaac Pruett, Owner at Mason Remodeling, serving Montclair, CA since 2004.
