







Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable Bathroom Remodeling Across Larkspur
Bathroom remodeling in Larkspur, CA typically runs $9,000 – $28,000 for a full gut-and-replace, and most projects take three to six weeks from demo to final inspection. The spread comes down to what’s behind your walls. Larkspur’s older housing stock sits on the historic Larkspur Creek floodplain, which means subfloor rot and aging cast-iron drains show up more often than anyone wants to admit. That’s why we scope every job with written allowances before demo, so you know the real number before we open anything up. Call (803) 680-2547 for a written quote on your Larkspur bathroom.
Why Mason Remodeling Is Larkspur’s Preferred Bathroom Remodeling Company

Larkspur homeowners call us because we put the price in writing before the first tool comes off the truck. No verbal estimate that grows by week three. No surprise invoice after the tile is set. Isaac Pruett leads our crew with a straightforward rule: you see the full scope, the allowances, and the change-order terms before we start. That matters in Marin, where a 1950s ranch off Magnolia Avenue can hide a failing mud-set tile bed and a cast-iron drain that nobody quoted.
Our crew arrives with name and photo sent ahead, uniform on, badge at the door. That’s The Threshold Standard, and it’s how Mason Remodeling has operated since 2004 as part of the Threshold Group family.
We’re not the cheapest bathroom remodeler in Larkspur, and we don’t try to be. We’re the one that tells you what the work actually involves, what it costs, and what’s covered for 365 days after completion. No conditions, no dispute process. If something fails, we return free. That’s the 365-Day Done Right Promise.
Styles & brands we work with







One Day Bath Remodel in Larkspur
A One Day Bath Remodel in Larkspur is exactly what it sounds like: a cosmetic refresh of an existing shower or tub surround, done in a single day. We remove the old surround, re-set the substrate if it’s sound, install the new wall system, and trim it out. The catch on Larkspur’s older homes is the substrate. A 1950s bathroom with a mud-set tile bed that’s been leaking won’t survive a one-day refresh. If the subfloor or drain is compromised, the job becomes a full bath remodel, not a one-day bath. We inspect before we commit to the one-day timeline.
When a one-day bath makes sense
If your Larkspur bathroom is a guest bath or hall bath that’s structurally fine but cosmetically tired, a one-day bath can get you a fresh, clean surround without weeks of disruption. Most one-day bath projects in Larkspur land in the $5,000 – $12,000 range for a small bathroom refresh, depending on the surround material and fixture package.
When to skip it
If you’ve noticed soft spots around the toilet flange, a musty smell that won’t go away, or grout lines that crack within months of being re-grouted, the substrate is failing. A one-day bath won’t fix that. Call us, and we’ll open it up and tell you what’s actually under there before you spend a dime on finish materials.
Bathroom Remodeling Contractor in Larkspur

A Bathroom Remodeling Contractor in Larkspur handles the full job: demo to final paint. For a Larkspur bathroom, that means pulling the old tub or shower, inspecting the framing and drain, replacing what’s rotted or failed, re-setting the plumbing rough-in, then tile, fixtures, and trim. A full bathroom remodel in Larkspur runs $9,000 – $28,000. Small bathroom remodels start around $5,000. The range reflects what’s behind the walls, not just what you see at the end.
Full bathroom remodels, start to finish
We handle everything: permits, rough-in inspection, subfloor repair, waterproofing, tile, vanity installation, and final inspection. We use specification-grade materials from KraftMaid and Wellborn for cabinetry, Kohler and Moen for fixtures, and Cambria or Silestone for countertops. Every project gets a written price before work starts, and a written guarantee with clearly stated terms.
Walk-in showers and tub-to-shower conversions
Walk-in shower installation in Larkspur runs $4,500 – $12,000. A tub-to-shower conversion runs $3,500 – $10,000. Both are popular for Larkspur homeowners who want to age in place or simply prefer a curbless entry. We install frameless glass enclosures, mud-set or Schluter waterproofing (the orange membrane that seals the shower pan), and the trim details that make tile work look right.
Trusted Brands We Service in Larkspur
Our Larkspur customers often ask what happens when a specialty brand needs service. We work with Kohler, Moen, and Toto fixtures, which means warranties get honored and parts get ordered correctly the first time. We also install Cambria and Silestone countertops, and for exterior or structural work that touches bathroom projects, we’re familiar with Sakrete and Dvele specifications. No runaround about which brand is compatible. We stock common parts locally, and for Larkspur customers that means faster turnaround on finish-level corrections.
See the difference
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After
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AfterCommon Bathroom Remodeling Problems We See in Larkspur Homes
- Rotted subfloor under the tile bed. Larkspur’s location on the Larkspur Creek floodplain means many older homes have had periodic water intrusion. When a mud-set tile bed cracks or a shower pan leaks, the subfloor under it rots quietly until someone opens the wall. We’ve pulled tile in Larkspur and found the framing underneath reads like a sponge.
- Failing cast-iron drain lines. Homes built in the 1950s and 1960s in Larkspur often have original cast-iron piping. After decades, it rusts from the inside out. A bathroom remodel is the time to address it, because you don’t want to re-tile over a drain that’s about to fail.
- Improper waterproofing from a previous quick-flip remodel. We see Larkspur bathrooms where someone installed tile directly over drywall with no waterproofing membrane. That fails within a couple of years. We open the wall, we show the homeowner what’s missing, and we fix it according to Marin County code.
- Under-allowanced fixtures from another contractor’s estimate. A low quote that shows basic builder-grade fixtures, then the homeowner wants the Cambria countertop they were shown at the estimate. The price jumps. We write fixture and finish allowances in the original scope so the number we quote is the number you pay.
Pricing for Bathroom Remodeling in Larkspur, CA
Here’s what you can expect to spend on bathroom remodeling in Larkspur, based on the work actually performed.
| Service | Larkspur Price 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 |
| Shower Replacement | $3,000 – $8,500 |
| Bathroom Vanity Installation | $800 – $3,000 |
What moves you from $9,000 to $28,000? Hidden rot behind the wet walls. A failing cast-iron drain. Moving plumbing lines. A curbless shower requiring structural work. Higher-end finishes like a Cambria countertop versus a standard quartz. We write those as allowances before demo so nothing surprises you. Call (803) 680-2547 for a written line-item quote on your Larkspur bathroom. Estimates are free.
We Also Serve Cities Near Larkspur
Beyond Larkspur, our crews work in Larkspur-adjacent communities around Marin. We serve Kentfield, Corte Madera, San Rafael, and Mill Valley with the same written pricing and crew verification standard. If you’re on the edge of Larkspur, call us. We’ll tell you if we can get a crew to you this week.
Serving Larkspur, CA - Our Local Coverage Area
We’re based in the Larkspur 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 Larkspur
Yes. If we’re moving plumbing, altering framing, or replacing a drain line, Marin County requires a permit and rough-in inspection. We pull permits ourselves, schedule the inspections, and pass them before we close walls. No unpermitted work, no “we’ll handle it later.” Call (803) 680-2547 if you’re unsure whether your project needs one. We’ll tell you straight.
Because some contractors quote what they can see, and some quote what’s likely behind the wall. A $9,000 quote on a 1950s Larkspur bathroom is often a photo-based number that doesn’t include rotted subfloor or a failing cast-iron drain. We write those as allowances in the original scope. Our bathroom remodeling work comes from our Bathroom Remodeling division, which standardized that process years ago. Call (803) 680-2547 if you want a quote that holds up.
A typical Larkspur bathroom remodel runs $9,000 – $28,000. A smaller hall bath often lands around $5,000 – $12,000 if the structure is sound. Walk-in shower installation runs $4,500 – $12,000. The exact number depends on what’s behind your walls and the finishes you choose. Call (803) 680-2547 for a written quote on your specific Larkspur bathroom.
Most Larkspur bathroom remodels take three to six weeks from demo to final inspection. The wildcard is hidden subfloor or drain work. If we open a wall and find rot, we add a change order and the timeline extends by a few days, not weeks. We schedule the permit inspections in advance so we don’t sit waiting on Marin County. Call (803) 680-2547 to schedule your free estimate.
Sometimes. If the existing substrate is sound and the surround is the only thing that needs replacing, a one-day bath remodel works. On a 1950s Larkspur home with a mud-set tile bed or a soft subfloor, it doesn’t. We inspect first. If the one-day option won’t hold, we’ll tell you and show you what we found. Call (803) 680-2547 and we’ll look at it together.
Written by Isaac Pruett, Owner at Mason Remodeling, serving Larkspur.










