Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Before
After
Before
After
Before
AfterFast, Reliable Bathroom Remodeling Across Hillsborough
A full bathroom remodel in Hillsborough typically runs $9,000 – $28,000 depending on square footage, fixture grade, and whether the project touches an exterior wall. That second variable matters more here than almost anywhere else on the Peninsula, because Hillsborough has zero commercial zoning and an Architectural Advisory Committee that reviews virtually every exterior alteration, including bathroom windows and vent stacks. We’re Penhallow Remodeling, led by Trevor Nash, and we plan around that process from day one. Call (936) 259-2607 for a written price before any work starts.
Hillsborough homeowners don’t ask us to rush a permit. They ask us to get the spec right the first time. Salt-heavy marine air off the Coast Range gap eats standard drywall corner bead and galvanized fasteners on hillside estates faster than most contractors expect. The clay-heavy soils on those same slopes send winter groundwater toward bathroom subfloors. We build for that reality, not for a flat inland lot in San Mateo. That’s why a Hillsborough bathroom remodel is not the same job as a Burlingame one, and we’ve learned to treat it that way.
Why Penhallow Remodeling Is Hillsborough’s Preferred Bathroom Remodeling Company
Hillsborough homeowners have dealt with enough contractors who bid low and walk away after the change order. We operate under The Kingswell Way, which has required a written price before any work starts since 2004. Trevor Nash runs our local operation. When he writes a number for a Hillsborough bathroom, that’s the number on the invoice. If a shower pan or a tile corner fails inside the first year, the 365-Day Done Right Promise means we return and fix it at no charge, in writing, on every project. No re-inspection fee, no service call. Just a return visit.
Every technician who walks into a Hillsborough home is background-checked and arrives in uniform. You know who’s coming. You know when we’ll arrive, because we give a real arrival window, not a four-hour guess. A live person answers our phone 24/7. When a Hillsborough homeowner calls at 7 a.m. about a rough-in question, a person picks up, not a voicemail maze.
We also know the local design-review process. That’s not marketing copy. It’s the difference between a bathroom remodel that gets a stop-work letter from the AAC and one that clears review in a single cycle. We submit sample finishes and elevation drawings up front. We walk inspectors through rough-ins before closing walls. Hillsborough’s process rewards contractors who prepare, and that’s how we work.
Walk In Shower in Hillsborough
A Walk In Shower in Hillsborough changes what waterproofing means. Hillsborough’s clay-heavy sloped lots move groundwater toward bathroom subfloors far more aggressively than flat valley floors in Burlingame or San Mateo. That means the shower pan, the moisture barrier behind the tile, and every fastener under the wall board have to be selected for the wet, salt-tinged, shifting reality of this town. A walk-in shower installation in Hillsborough runs $4,500 – $12,000 depending on size, glass enclosure, and whether we’re replacing a tub or building from studs. Most of our Hillsborough walk-in shower projects land between $6,000 and $9,000 for a standard 5-foot conversion with a fiberglass or acrylic base, and higher when the homeowner wants a tiled pan, frameless glass, or a zero-threshold entry.
What We Build Into Every Shower Pan
We use a sealed pan system rather than standard thinset-only construction in Hillsborough bathrooms. The marine air and expansive clay soil make moisture management the top failure point on any walk-in shower. We also specify stainless or hot-dip galvanized fasteners on every wet wall, because standard drywall screws and corner bead rust through within three to five years on hillside bathrooms facing the marine layer.
Frameless Glass and Curbless Entries
Hillsborough estates built in the 1920s and 1930s often have smaller hall baths where a curbless entry changes the entire room. We’ve installed frameless glass enclosures in Spanish Colonial Revival homes near the Burlingame Country Club side of town where the original tub footprint was too large for the space. The right glass enclosure, measured after the pan is set, opens up a room without forcing a structural change. On a 1930s estate we opened a hall bath and found the original lath-and-plaster furring had crumbled behind a tub surround and the subfloor had swelled from a slow copper pinhole leak. We rough-in-plumbed a new Schluter system, specified a Kohler cast-iron receptor, and set Caesarstone on a KraftMaid vanity with all-stainless fasteners. The AAC had already approved the window replacement in a single review cycle because we submitted sample finishes up front.
Bathroom Remodeling Companies in Hillsborough
Most Bathroom Remodeling Companies in Hillsborough fall into two camps: high-end design-build firms that price like the address demands it, and out-of-town crews that quote inland specs and then stall when the AAC asks for material samples. We occupy the middle: written pricing, coastal-grade materials, and a process built for Hillsborough’s design-review reality. A full bathroom remodel here runs $9,000 – $28,000. The low end is a modest hall bath with a fiberglass pan, stock vanity, and chrome fixtures on a 1940s home with an interior-only scope. The high end is a master suite on a hillside estate with a tiled walk-in shower, a freestanding tub, a Cambria or Caesarstone vanity top, heated floors, and an exterior vent or window that goes through AAC review.
The Price Difference Between Coastal and Inland Spec
A Hillsborough bathroom spec will cost 10 – 20% more than the same floor plan in San Mateo because we’re specifying stainless fasteners, moisture-resistant board in every wet wall, marine-grade shower trim, and sealed pans instead of standard thinset. That’s not an upcharge. It’s what keeps tile from popping and paint from blistering in the marine air. The cheap inland-spec version fails within a decade and costs more to tear out and redo than the coastal spec costs on day one.
How We Handle AAC Review
If your bathroom remodel touches an exterior window, an exterior vent stack, or any visible elevation change, it goes to the Architectural Advisory Committee. We submit samples, elevations, and neighbor notification documents before we ask for the building permit. That sequence is not optional in Hillsborough. Skip it and you’ll get a stop-work letter. Do it correctly and the review often clears in one cycle. We’ve done it both ways for other clients; we only do it the correct way now.
Trusted Brands We Service in Hillsborough
We install materials from recognized trade brands because a 365-Day Done Right Promise means nothing if the product behind it fails. For Hillsborough bathrooms we regularly specify KraftMaid and Wellborn cabinetry, Cambria, Silestone, and Caesarstone countertops, and Kohler and Moen fixtures. We don’t stock a warehouse of parts, but we maintain relationships with Bay Area suppliers that let us turn around most fixture and replacement hardware orders for Hillsborough customers in days, not weeks. If a Moen cartridge fails inside the warranty, we handle the warranty claim and the return trip. The brands are part of the guarantee, not separate from it.
Common Bathroom Remodeling Problems We See in Hillsborough Homes
- Rusted drywall corner bead and galvanized nail heads. Hillsborough bathrooms facing the marine layer rust through standard fasteners within three to five years. The paint blisters behind the vanity and along the shower line. We specify stainless or hot-dip fasteners and moisture-resistant board in every wet wall, which is not the standard inland spec.
- Subfloor swelling from groundwater on sloped lots. Hillsborough’s clay-heavy soils expand and contract through the rainy season, sending moisture toward slab penetrations and subfloor joints. Tile grout pops and the subfloor swells. We pre-empt this with a sealed pan and moisture barrier under the finished floor, not just standard thinset.
- AAC stop-work letters on “minor” bathroom window changes. A homeowner replaces a bathroom window without design review, and the city sends a stop-work letter requiring a material-sample resubmittal. What should have been a two-week punch list turns into a three-month delay. We submit before we build.
- Chrome shower trim corroding within a few years. Standard chrome trim and galvanized shower hardware do not survive Hillsborough’s salt air on exposed hillsides. We specify marine-grade finishes or powder-coated hardware for exterior-adjacent bathrooms, and we explain the cost difference up front so there are no surprises on the invoice.
Pricing for Bathroom Remodeling in Hillsborough, CA
Here are the real numbers we quote in Hillsborough, written before we pick up a tool. These ranges reflect the coastal spec and the AAC design-review work; they are not the same prices you’d see in San Mateo or Burlingame.
| Project | Price Range |
|---|---|
| Bathroom Remodel | $9,000 – $28,000 |
| Small Bathroom Remodel | $5,000 – $12,000 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Bathroom Vanity Installation | $800 – $3,000 |
What moves the number: whether the scope stays interior or touches an exterior wall, the grade of tile and fixture, whether the pan is fiberglass or tiled, and whether the house is a 1920s lath-and-plaster estate or a newer custom build. We write the price after we see the job, not before, and we don’t change it when the walls come open unless you ask us to add scope. Call (936) 259-2607 for a free estimate. It’s written, it’s fixed, and it’s backed by the 365-Day Done Right Promise.
We Also Serve Cities Near Hillsborough
While this page is about Bathroom Remodeling in Hillsborough, our teams also work in nearby communities across the wider region, including Los Angeles, San Diego, San Jose, and San Francisco. Scheduling is coordinated from our San Francisco Bay Area office, and crews serve Hillsborough locally. If you’re outside Hillsborough, call and ask. We’ll tell you honestly whether we serve your street. You can also learn more about our process on our Bathroom Remodeling page.
Serving Hillsborough, CA - Our Local Coverage Area
We’re based in the Hillsborough 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 Hillsborough
Yes, if the remodel touches any exterior element: a bathroom window, an exterior vent stack, an outside-visible elevation change, or a new skylight. The AAC reviews material samples, elevations, and neighbor notification documents before a building permit can be issued. Interior-only bathroom remodels do not need AAC review, but any exterior work does. We determine this early, before we write the price. Call (936) 259-2607 and we’ll check your specific scope.
Because Hillsborough’s marine air corrodes standard chrome trim and galvanized hardware. The coastal spec uses stainless or hot-dip fasteners, moisture-resistant board in wet walls, marine-grade shower trim, and sealed pans instead of standard thinset. The parts are more expensive and the labor takes slightly longer. The coastal spec adds 10 – 20% to the material line, but the inland version fails within three to five years and the tear-out costs more. We show you both numbers and let you choose with the consequences laid out in writing.
The expansive clay soils on Hillsborough’s hillside lots move groundwater toward bathroom subfloors and slab penetrations during the rainy season. That movement swells subfloors, pops tile grout, and stresses the pan. We build for it by installing a sealed pan, a moisture barrier under the finished floor, and stainless fasteners in every wet wall. A bathroom built with inland-spec thinset on a sloped Hillsborough lot will fail faster than the same floor plan on a flat valley lot. The soil decides the spec.
Three things: a written price, a written guarantee, and a written scope that covers AAC review if exterior work is involved. The Kingswell Way requires a written price before any work starts, a defined arrival window, and a 365-Day Done Right Promise on every project. If something fails inside the guarantee period, we return and fix it at no charge. A second visit if a repair fails is free. Do not accept a verbal price on a Hillsborough bathroom remodel. Get it in writing.
Yes. Hillsborough requires building permits for bathroom remodels that alter plumbing, electrical, or structural elements. The city inspector signs off on the rough-in before walls close and on the final after the work is complete. We schedule both inspections and walk the inspector through the rough-in. It’s not optional, and a bathroom remodel that skips a required permit can delay a future home sale. Call (936) 259-2607 and we’ll confirm what your specific scope triggers.
Written by Trevor Nash, Owner at Penhallow Remodeling, serving Hillsborough as part of the Kingswell family of companies.