







Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable Bathroom Remodeling Across Los Altos
Bathroom remodeling in Los Altos typically runs $9,000 – $28,000 for a full project, with smaller refreshes landing between $5,000 and $12,000. The number that matters most to you is the one on your written quote, and that’s exactly what we hand you before any tile is pulled. Call us at (669) 274-2362 and Trevor Nash will walk you through what the job actually involves, not a vague ballpark.

Our crews know Los Altos’s older post-and-beam homes, the slow design-review process at City Hall, and the septic-system realities in North Los Altos that turn a simple bathroom job into something requiring real coordination. That local knowledge changes what your quote should include. If you’re planning a remodel near Foothill Expressway, off El Monte, or up in the hills west of town, you’ll want a contractor who’s already navigated the sign-off dance that comes with this city. We have.
Why Penhallow Remodeling San Jose Is Los Altos’s Preferred Bathroom Remodeling Company

We’re a Bathroom Remodeling team that works differently. Every Los Altos project gets a written price before work starts, not an estimate range that drifts upward once the walls are open. That number is the number on the final invoice. It’s in writing, and so is the 365-Day Done Right Promise: if something fails inside a year, we come back and fix it at no charge.
Our technicians are background-checked and arrive in uniform, so you know exactly who’s walking into your home. A live person answers the phone around the clock, not a voicemail prompt. When you call about a Los Altos project, you reach someone who can actually talk through your scope, your timeline, and your permit questions right then.
Trevor Nash leads the team with a straightforward rule: say the price before the work, show up in the window we gave, and leave the place cleaner than we found it. That’s The Kingswell Way, the operating standard we’ve followed since 2004. It’s why Los Altos homeowners who’ve been burned before tend to stick with us.
Styles & brands we work with







Bathroom Renovation in Los Altos
Bathroom renovation in Los Altos means more than swapping fixtures. The city’s design review often treats even an interior remodel as a structural matter, especially in the 1950s through 1980s post-and-beam homes that dominate the housing stock. If you’re moving a wall, even a short section of one, you’re probably looking at an engineer’s letter before you look at a permit stamp. Our quotes account for that step up front, so the price you’re handed includes the sign-off, not just the tile.
Full Bathroom Remodeling
A full bathroom remodel in Los Altos runs $9,000 – $28,000 depending on layout changes, plumbing relocation, waterproofing, and finish choices. Most of the cost difference comes down to what’s behind the walls: moving a drain line costs more than moving a towel bar. We price the job line by line before you commit.
Walk-In Showers & Frameless Glass
Walk-in shower installation in Los Altos typically runs $4,500 – $12,000. Frameless glass enclosures add between $800 and $3,000 depending on panel size and hardware finish. Curbless showers are popular here, but they trigger specific waterproofing and drainage requirements that we spec in writing before demo day.
Small Bathroom Remodel in Los Altos
A small bathroom remodel in Los Altos, say a guest bath or a hall bath under 50 square feet, typically runs $5,000 – $12,000. The tighter the footprint, the more the cost per square foot climbs, because you’re still paying for waterproofing, venting, and code compliance even when the room is small. But you don’t need a structural engineer unless walls are coming down.
Vanities, Tile & Fixtures
We install vanities from KraftMaid and Wellborn, countertops from Cambria and Silestone, and fixtures from Kohler and Moen. These brands carry their own warranties that sit alongside ours, which matters when something cracks six weeks after install and you want a real answer, not a callback number.
Tub-to-Shower Conversion
Tub-to-shower conversions in Los Altos run $3,500 – $10,000. The range is wide because older homes here have cast-iron tubs surrounded by plaster and lath, and getting that out without wrecking the subfloor takes care. We include the demolition and disposal in the written price.

Trusted Brands We Service in Los Altos
We work with and service bathrooms built around products from CGI, ES Windows, and ECO Window Systems, and we keep the local supply-chain relationships that mean faster turnaround for Los Altos jobs. If your bathroom has a specific window make or a shower enclosure hardware spec you want matched, we’ll source it and document it in the quote. No substitutions without your sign-off, and nothing left in vague territory about what product is actually going in.
See the difference
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AfterCommon Bathroom Remodeling Problems We See in Los Altos Homes
- Load-bearing walls hiding in post-and-beam framing. Many Los Altos homes built from the 1950s through 1980s use post-and-beam construction, so a wall that looks non-structural can be carrying roof load. Cutting an opening without an engineer’s sign-off fails inspection and can compromise the roof structure. We confirm bearing status before demo starts.
- Septic capacity blocking permits in North Los Altos. In the North Los Altos neighborhood, many homes still run on septic systems. Adding a bathroom, even a remodel that changes fixture count, can push the city to require a sewer capacity check or a full system upgrade before framing begins. We’ve watched this add five figures to projects that started as a simple shower swap.
- Winter drainage and waterproofing on hillside lots. Homes on the western edge of Los Altos, toward the foothills, deal with winter rain that tests every flashing and waterproofing seam. Improper waterproofing under tile on a slab or hillside foundation fails slowly, and by the time you see the stain, the subfloor’s already compromised. We spec cement board substrate (the moisture-resistant layer behind your tile) and a waterproofing membrane on every wet-area job.
- Skipping permits to save time backfiring during resale. Los Altos’s permitting process is notoriously slow, so some homeowners remodel without one. The problem shows up at resale, when unpermitted work in the bathroom gets flagged and you’re correcting it under a deadline and a buyer’s microscope. We pull permits and pass inspections on every job, and the paperwork’s yours at close-out.
Pricing for Bathroom Remodeling in Los Altos, CA
Here’s what you can expect in Los Altos, with real numbers.
| Project Type | Typical Range in Los Altos |
|---|---|
| Bathroom Remodel | $9,000 – $28,000 |
| Small Bathroom Remodel | $5,000 – $12,000 |
What moves the number is scope: moving walls, relocating drains, tile selection, whether the floor is slab or raised, and whether septic or engineer sign-off enters the picture. A compliant quote includes permits, structural review if needed, and waterproofing. A cheap quote skips those and surprises you later. Call (669) 274-2362 for a free estimate with a written price before any work starts.
We Also Serve Cities Near Los Altos
Our crews cover Bathroom Remodeling in Los Altos and the surrounding communities, including Mountain View, Stanford, Cupertino, and Atherton. Each city has its own permit quirks, but the same written-price standard and 365-Day Done Right Promise apply everywhere we work.
Serving Los Altos, CA - Our Local Coverage Area
We’re based in the Los Altos 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 Los Altos
Yes, in most cases. If the wall is load-bearing, which is common in the post-and-beam homes built in Los Altos from the 1950s through the 1980s, the city will require an engineer’s sign-off before a permit is issued. We arrange that review and include the cost in your written quote. Call (669) 274-2362 to confirm your specific wall before you plan around it.
If your North Los Altos home is on a septic system and your remodel adds a fixture or changes drainage, the city may require a capacity sign-off or a full sewer hookup before permitting moves forward. That can add tens of thousands to the job, and it’s the kind of cost you want to know about before demo. In a recent North Los Altos master bath project, the septic sign-off came through before we opened a single wall, and the job stayed on the written number. Call (669) 274-2362 for a free estimate that accounts for this from day one.
A compliant quote includes permits, structural engineer review if walls move, waterproofing membrane like Schluter, pressure-balanced valves, drain and vent sign-off, and inspection scheduling. A cheap quote leaves out the engineer, skips the membrane, and lets you discover the difference when the inspector arrives. We write every line item down before work begins. Call (669) 274-2362 for that level of detail on your project.
Yes, but it requires a specific waterproofing system and careful drainage planning because the floor sits directly on the slab. We use a Schluter waterproofing membrane and coordinate the drain placement with the slope so water moves where it should. In Los Altos, this work also needs the usual permit and inspection path, which we handle. Call (669) 274-2362 to get a written quote that includes the waterproofing work, not just the glass.
Because Los Altos’s design review and inspection process is more exacting than in neighboring cities, so the sign-off list tends to include more items: structural verification, waterproofing inspection, drainage and vent sign-off, and sometimes septic review. It’s not a sign of a slower contractor; it’s what the city requires. Our written guarantee covers the work, and if anything on that punch list fails inside a year, we come back and fix it at no charge. Call (669) 274-2362 with any questions about what your specific project will face.
Need a number you can actually hold us to? Call (669) 274-2362 today and Trevor Nash will put a written quote on your kitchen table before any tile is ordered. Estimates are free, and the price you see is the price you pay.
Written by Trevor Nash, Owner at Penhallow Remodeling San Jose, serving Los Altos and the surrounding Bay Area.











