







Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable Bathroom Remodeling Across Windsor
A full bathroom remodel in Windsor typically runs $9,000 – $28,000, with small baths starting around $5,000 and walk-in showers landing between $4,500 and $12,000. We’re Mason Remodeling, led by Isaac Pruett, and we’ve been doing this work since 2004 as part of the Threshold Group family of home-service companies. Windsor homeowners call us because we show up with a written price before any tool gets unpacked, and because every crew member who walks through your door has already been introduced to you by name and photo. Call (803) 680-2547 to schedule your free estimate.
Why Mason Remodeling Is Windsor’s Preferred Bathroom Remodeling Company

Windsor bathrooms from the 1980s and 1990s come with a specific set of problems, and we’ve seen enough of them to know what we’re walking into before the first tile comes off. Most of Windsor’s housing stock went up between the 1980s and early 2000s, which means polybutylene supply lines, center-set drains, and subfloors that have been quietly soaking up slow toilet leaks for twenty years. We plan for that.
Every project starts with a written price. Not a verbal ballpark, not an estimate that grows once demo starts. A written price, delivered before work begins, on every job. Our crews arrive in clean marked uniforms, show a photo ID badge at the door, and you’ll already know who’s coming because we send their name and photo ahead of time. That’s The Threshold Standard, and we don’t waive it for anyone. When the work is done, you get a written guarantee with plainly stated terms: 365 days from the completion date. If something isn’t right within that year, we fix it at no cost to you.
Styles & brands we work with







Walk In Shower in Windsor
A Walk In Shower in Windsor usually costs $4,500 – $12,000 depending on whether we’re converting a tub, replacing an existing shower pan, or building a curbless entry with custom tile. The big variable in Windsor homes is what’s hiding behind the old tub surround. If the original polybutylene lines are still in place, they get replaced. If the subfloor under the shower has been soaking up water since the Clinton administration, it gets repaired before any tile goes down.
Frameless Glass and Curbless Entries
Frameless glass enclosures are the most requested upgrade on Windsor walk-in showers, and they run more than a standard curtain rod for good reason: the glass is cut to the exact opening after tile and waterproofing are done, and the hinges carry weight differently than a framed unit. Curbless entries need special attention to floor slope and drain placement, which is why we rough in the slope during framing rather than trying to make it up with mortar later.
Tub-to-Shower Conversion Basics
Converting a tub to a walk-in shower in Windsor runs $3,500 – $10,000. We pull the tub, inspect the drain and trap, move the supply lines if needed, install a new shower valve, waterproof the walls with a board like DensShield, and tile over it. If we find a 4-inch center-set drain that’s out of current code, we correct it before the pan goes in. Written change order first, signed off by you, then we close the walls.
Bathroom Remodeling Companies in Windsor

Bathroom Remodeling Companies in Windsor fall into two groups: those that bid a verbal scope and then hand you change orders when you pick a nicer vanity, and those that put every allowance in writing before work starts. We’re the second kind. A full Bathroom Remodeling project in Windsor typically lands between $9,000 and $28,000, and our written price includes the tile, fixtures, and glass we discussed, not a base number that balloons when you actually make selections.
What a Full Remodel Actually Includes
Demo of the existing tile, tub, or shower. Rough-in plumbing brought up to code. Any subfloor repair uncovered during demo. New waterproofing, tile work, vanity installation, fixture trim-out, and a final inspection sign-off. In Windsor’s raised-floor homes from the 1980s, subfloor rot is common enough that we include a written allowance for it so you’re not surprised.
Small Baths and Powder Rooms
A small bathroom remodel in Windsor runs $5,000 – $12,000. That’s a guest bath or powder room where we’re replacing the vanity, toilet, flooring, and fixtures without moving plumbing. If the floor joists are sound and the drain is in good shape, these projects move fast. If the scope grows, it grows with your signature on a change order, not with a surprise invoice at the end.
Trusted Brands We Service in Windsor
We install and service cabinetry from KraftMaid and Wellborn, surfaces from Cambria and Silestone, and fixtures from Kohler, Moen, and Toto. Windsor homeowners have access to the same specification-grade products we use on larger projects, whether that’s a Kohler tub-shower valve or a KraftMaid vanity with frameless doors. We also work on projects involving Abodu and Dvele accessory dwelling units, where the bathroom finishes are often specified at the factory level and need an installer who can match the existing tile and trim without fighting the manufacturer’s spec sheet.
See the difference
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AfterCommon Bathroom Remodeling Problems We See in Windsor Homes
- Polybutylene supply lines: Homes built in the 1980s and early 1990s around Windsor frequently have gray polybutylene lines feeding the tub and sink valves. These lines have a known failure history, and leaving them in place behind new tile means risking a leak that destroys new work. We replace them as a matter of course once walls are open.
- Spongy subfloors from slow toilet leaks: The wax ring under a 25-year-old toilet has usually been weeping for years before anyone notices the floor feels soft. In Windsor’s raised-floor homes, that means replacing a section of subfloor before new tile can go down. It’s not a defect in your house; it’s just what two decades of slow moisture does.
- Offset or corroded drains: 4-inch center-set drains from the 1980s don’t always line up with modern shower bases. When they’re offset or the trap is corroded, we correct the rough-in before setting the pan. Doing that after tile is in place costs triple.
- Unpermitted prior work: When someone’s cousin flipped a Windsor tract home and did a bathroom without permits, the buyer inherits a problem. Unpermitted shower pans and rough-in electrical turn up during inspection and can kill a sale or trigger a forced redo. Our work is permitted where required, and inspection sign-offs are part of the job.
Pricing for Bathroom Remodeling in Windsor, CA
Here’s what you’re looking at in Windsor, with real numbers:
| Project | Typical Windsor Range |
|---|---|
| Bathroom Remodel | $9,000 – $28,000 |
| Small Bathroom Remodel | $5,000 – $12,000 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Tub-to-Shower Conversion | $3,500 – $10,000 |
| Bathroom Vanity Installation | $800 – $3,000 |
What moves the number: the condition of the subfloor and drain once demo starts, whether you’re moving plumbing or keeping the same footprint, tile selection, glass enclosures, and fixture grade. A standard Windsor hall bath with a tub-shower combo and mid-range tile lands in the lower half of the full-remodel range. A primary bath with a custom walk-in, frameless glass, and a KraftMaid double vanity lands in the upper half. You’ll know your number before work starts. Call (803) 680-2547 for a free written estimate.
We Also Serve Cities Near Windsor
Our crews cover Windsor and the surrounding communities, including Healdsburg, Santa Rosa, Sebastopol, and Calistoga. If you’re just outside town limits or in one of the newer developments off Old Redwood Highway, we can usually schedule within the same week or two as a central Windsor project.
Serving Windsor, CA - Our Local Coverage Area
We’re based in the Windsor 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 Bathroom Remodeling in Windsor
Yes, most Windsor bathroom remodels require a permit if you’re moving plumbing, altering the shower pan, or changing electrical. The Town of Windsor requires permits for any work that modifies the rough-in plumbing or electrical systems. Simple fixture swaps and cosmetic updates may not, but once we open walls and touch supply lines or drains, we pull the permit and schedule the inspection. Skipping this to save a few hundred dollars is how unpermitted shower pans end up flagged during a home sale. Call (803) 680-2547 and we’ll tell you exactly what your project needs.
A typical full bathroom remodel in Windsor runs $9,000 – $28,000. Smaller guest baths land between $5,000 and $12,000, walk-in showers run $4,500 – $12,000, and a standalone vanity installation is $800 – $3,000. Your specific number depends on subfloor condition, plumbing scope, tile, and fixtures, and you’ll have it in writing before we start.
Most Windsor bathroom remodels take 3 to 6 weeks from demo to final inspection. A small guest bath with no plumbing moves might take 2 to 3 weeks. A primary bath with a custom walk-in, frameless glass, and tile work usually runs 5 to 6 weeks. Permitting and inspection scheduling in Windsor add a few days at the front and back end, and we account for that in the calendar we give you upfront.
The price changes when the existing structure is worse than anticipated: rotted subfloor, offset drains, polybutylene supply lines that must be replaced, or mold behind old tile. These aren’t surprises to us; we plan allowances for them in the written price. If the scope grows, you sign a written change order before we proceed. You never see a bigger invoice without first approving it.
No. A bathroom remodel is planned construction, not emergency work. We don’t pretend to remodel a bathroom same-day, and we won’t rush your project. What we do is give you a realistic calendar and a written price, then hit both. If a pipe bursts mid-project, we handle the plumbing repair immediately, but the remodel itself is scheduled work, done right. Call (803) 680-2547 to get on the schedule.
Written by Isaac Pruett, Owner at Mason Remodeling, serving Windsor since 2004.










