Fast, Reliable Bathroom Remodeling Across Montclair
A bathroom remodel in Montclair typically runs $18,000 – $42,000 for a full gut renovation, with smaller refreshes starting around $9,000 and primary-suite expansions reaching $65,000+. The single biggest factor isn’t tile choice or fixture finish. It’s what you find once the walls come open in a 1950s-to-70s tract home. We know exactly what’s behind those walls because we’ve opened hundreds of them across the 91763, and we price that reality into the contract before demolition starts. Call (844) 934-0236 to schedule a free in-home estimate and get a written, line-item quote.
Why Newport Beach ADU Builders Is Montclair’s Preferred Bathroom Remodeling Company
Montclair homeowners don’t need a contractor who treats a 1963 tract house like a blank slate. They need someone who knows that the bathroom in a home near Ramona Avenue was likely plumbed with galvanized steel that’s now sixty years old, and that the cast-iron drain under the slab has been quietly failing for a decade. That’s the difference between a quote that holds and one that blows up two weeks into demo.
Our Bathroom Remodeling team approaches every Montclair project the same way: pre-inspection first, written allowances second, demolition third. Neil Stratton built this process after watching too many Pomona Valley homeowners get burned by change orders that should have been anticipated. We don’t skip the inspection to make the bid look cheaper. We’d rather lose the bid than lie to you about the number.
Homeowners across Montclair, from the neighborhoods around Montclair Place to the streets flanking Moreno Elementary, have called us because they want a contractor who speaks plainly about what a permit will trigger. When we tell you the city requires a permit for any layout change that moves a drain or a wall, and that this permit pulls older plumbing up to current code, we’re not hiding the cost. We’re writing it into the allowance so you can make an informed decision before the first hammer swings.
We serve Montclair as a local contractor should: we know the city, we’re familiar with the building department’s expectations, and we show up when we say we will. Our office is in Newport Beach, but our crews work across the Inland Empire every week. Montclair is not an afterthought to us.
Our Bathroom Remodeling Services in Montclair
Full Bathroom Gut Renovations
A full gut renovation in Montclair means taking the room to the studs and rebuilding. For most 1950s-70s tract homes, this is the honest route. The tile is hiding water damage, the subfloor is soft around the toilet flange, and the electrical is nowhere near code. We handle the entire scope: demo, plumbing replacement, electrical upgrades, drywall, waterproofing, tile, fixtures, and finish. You get one contract, one schedule, and one point of accountability from the day we pull the permit to the day you walk into a finished bathroom. Expect $22,000 – $42,000 depending on size, finishes, and what the pre-inspection turns up.
Shower and Tub Replacements
Replacing a tub or shower in Montclair often requires more than swapping the pan and surround, because the framing underneath is frequently undersized or compromised. We sister joists, add blocking for grab bars and benches, and rebuild the waterproofing system from the backer board out. A standard tub-to-shower conversion runs $8,500 – $15,000 in Montclair. Walk-in showers with custom tile and glass start around $12,000 and climb from there.
Vanity, Countertop, and Fixture Upgrades
Not every Montclair bathroom needs to be torn down to the studs. When the layout works and the plumbing is sound, a vanity replacement, new countertop, updated lighting, and fresh fixtures can transform the room for $4,000 – $9,000. We’ll tell you honestly if this is the right scope for your home. We won’t sell you a full gut if a refresh gets you where you want to be.
Tile and Waterproofing Restoration
The most common hidden failure in Montclair bathrooms is waterproofing behind original tile. By the time grout cracks and caulk separates in a bathroom near Kingsley Street, water has likely been seeping into the wall cavity for years. We strip old tile, repair or replace damaged substrate, install modern membrane systems, and retile correctly. This scope typically runs $7,500 – $14,000 when we catch it early. When we don’t, the number grows into a full renovation.
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.
Trusted Brands We Service in Montclair
We work with the brands you’ve already been researching, including James Hardie backer board systems and Plant Prefab components where they fit the project. For Montclair homeowners adding a bathroom as part of a larger ADU or garage conversion, Boxabl and Tuff Shed platforms give us factory-built options that speed up the shell so our bathroom remodeling team can finish the interior under the same contract. We stock common parts and materials locally, which means fewer delays waiting on shipments when your remodel is mid-swing. If you’re comparing manufacturers, we’ll tell you honestly which one fits your lot, your budget, and your timeline. We work with all of them, so we have no reason to push one over another.
Common Bathroom Remodeling Problems We See in Montclair Homes
- Galvanized steel supply lines failing pressure tests. Most Montclair homes built before the mid-1970s used galvanized pipe for supply lines. After five or six decades, that pipe corrodes from the inside and fails a pressure test. If your remodel changes the layout, the permit requires replacement. We catch this in pre-inspection and write the allowance before demo.
- Cast-iron drain lines cracked at the hub or rotted through. We regularly find cracked cast-iron drains leaking into subfloors under Montclair bathrooms. The damage is hidden until walls open, which is why a pre-inspection and a written plumbing allowance matter. A $400 allowance can absorb a $1,800 repair without a change order.
- Undersized or water-damaged framing around tubs and showers. Mid-century tract builders framed for the cheapest possible pass. Decades of slow leaks from failed caulk and cracked grout soften joists and studs. We sister framing, add backing, and rebuild the structure before we ever touch tile or waterproofing.
- Failed waterproofing behind original tile. The original showers and tub surrounds in Montclair tract homes were often installed over drywall with no membrane. When we open those walls, the drywall is frequently crumbling. Without a written allowance for backer board and membrane replacement, this becomes a surprise cost. With us, it’s in the contract.
Pricing for Bathroom Remodeling in Montclair, CA
Here’s what Montclair homeowners can expect to pay, based on our recent work across the 91763:
- Fixture and vanity refresh: $4,000 – $9,000
- Shower or tub replacement (standard): $8,500 – $15,000
- Tile and waterproofing restoration: $7,500 – $14,000
- Full bathroom gut renovation: $22,000 – $42,000
- Primary suite expansion: $45,000 – $65,000+
What moves these numbers in Montclair specifically is the age of your home and the condition of the plumbing behind the walls. A 1978 bathroom in good shape will land at the low end. A 1959 bathroom with original galvanized supply and a failing cast-iron drain will land at the high end or trigger a repipe allowance. We show you the pre-inspection findings, walk you through the budget, and put every number in writing before you sign. Call (844) 934-0236 for a free estimate and exact pricing for your bathroom.
We Also Serve Cities Near Montclair
Our crews work all over the Pomona Valley. In addition to Montclair, we regularly complete bathroom remodels in Claremont, Ontario, Upland, and La Verne. If you live in a neighboring city and are dealing with the same mid-century plumbing and framing issues we described above, we can help. The same pre-inspection process applies everywhere we work.
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 – Bathroom Remodeling in Montclair
Because Montclair requires a permit for any bathroom remodel that changes the layout, and that permit triggers current plumbing code. Once a wall is open and the original galvanized supply lines are exposed, the inspector will require replacement if they fail inspection or fail a pressure test. In a 1960s tract home, those galvanized lines are almost always at the end of their service life. We handle this with a plumbing allowance in the contract, so a repipe doesn’t come as a surprise. Call (844) 934-0236 and we’ll explain what your specific home is likely to need.
Undersized tub decks, missing backing for grab bars and vanities, and water-damaged joists and studs from decades of slow leaks. In a 1962 tract home near the Montclair Plaza area, we opened a hall bathroom to relocate the vanity and found the original cast-iron drain had cracked and was leaking into the subfloor. We replaced the drain, added a code-required vent, and upgraded the undersized framing around the tub before waterproofing. The job stayed on budget because our contract included an allowance for hidden plumbing and framing repairs, and we priced the extra work in writing before proceeding.
We include a written waterproofing allowance in every Montclair bathroom contract. When we open a wall and find crumbling drywall, rotted backer board, or failed membrane behind original tile, the repair is priced and approved before we proceed. You never get a surprise invoice at the end of the project. This is one of the main reasons we do a pre-inspection and refuse to write a bare-bones quote that looks cheap but can’t possibly hold.
Yes, and this is exactly what so many contractors skip. If your remodel moves a fixture, changes a drain location, or exposes undersized or deteriorated drain and vent piping, Montclair’s current code requires the affected lines to be brought up to standard. In practice, for most mid-century homes in the 91763, this means replacing the existing cast-iron and galvanized lines in the bathroom. We factor this into the contract before we pull the permit, so you know the real number from day one.
We inspect the accessible plumbing in your crawlspace or under the slab, check the electrical panel for capacity, evaluate the framing beneath and around the bathroom, and test water pressure and drain flow. We look specifically for the failure modes common in Montclair’s 1950s-70s housing stock: galvanized supply lines, cast-iron drain deterioration, and compromised waterproofing. Then we write the quote with allowances for what the inspection suggests we’re likely to find. You get the real number up front. Call (844) 934-0236 to schedule yours.
Written by Neil Stratton, Owner at Newport Beach ADU Builders, serving Montclair and the Pomona Valley.