Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Before
After
Before
After
Before
AfterHow Much Does Tub-to-Shower Conversion Cost in Redwood City?
A tub-to-shower conversion in Redwood City typically costs $3,500 to $10,000, depending on shower size, materials, and whether the existing plumbing can stay where it is. Most Redwood City homeowners land somewhere between $5,000 and $7,500 for a mid-range conversion with tile walls, a prefabricated or custom base, and updated fixtures. Same-day starts are possible once a written price is in hand – under Clause 1 of the Haven Standard, no work begins until the number is on paper and you’ve agreed to it.
Tub-to-Shower Conversion Cost Breakdown (2026)
These ranges reflect actual Redwood City market pricing as of 2026 – labor rates in San Mateo County run higher than Central Valley benchmarks, so if you’ve seen national averages online, add roughly 20 to 30 percent.
| Line Item | Low End | High End | Notes |
|---|---|---|---|
| Demo and haul-away (tub removal) | $350 | $750 | Cast-iron tubs add cost; standard acrylic is straightforward |
| Plumbing rough-in adjustment | $400 | $1,800 | Higher end if drain must be relocated |
| Waterproof membrane and backer board | $300 | $700 | Critical layer; Schluter Kerdi or USG Durock are common specs |
| Shower base (prefab vs. custom tile) | $250 | $1,400 | Prefab acrylic pan at low end; custom mortar bed and tile at high end |
| Wall tile and installation | $800 | $2,800 | Subway tile at low; large-format porcelain or natural stone at high |
| Shower door or enclosure | $400 | $1,600 | Frameless glass runs $900-$1,600; curtain rod setup at low end |
| Fixtures (valve, head, hand wand) | $250 | $1,000 | Kohler Forte or Moen Adler at mid-range; Kohler DTV or Grohe at high end |
| Permits (City of Redwood City) | $150 | $400 | Required when drain or valve location changes |
| Drywall patching and paint | $200 | $600 | Needed when wall tile doesn’t extend to ceiling |
| Total (typical range) | $3,500 | $10,000 | Most Redwood City jobs fall between $5,000 and $7,500 |
The single biggest swing factor in that table is whether your drain stays put. In many older Redwood City homes – particularly the post-war ranch-style houses in Horgan Ranch and the 1960s builds near Farm Hill – the tub drain is centered on the long wall, which is exactly where a shower drain needs to be. That alignment saves $400 to $800 in plumbing labor. In newer construction with off-center tub drains, relocation adds time and cost, and the concrete subfloor in some slabs requires cutting.
Material choice is the other major variable. A clean, durable conversion using prefab acrylic panels from a brand like Swanstone or American Bath Factories can hold well under $5,000 total. A custom walk-in shower with 24×48 rectified porcelain tile, a linear drain, and a frameless glass enclosure from a vendor like Coastal Shower Doors will push toward the top of the range. Both outcomes are valid – the difference is preference, not quality of work.
What Affects Tub-to-Shower Conversion Pricing in Redwood City
- Drain and plumbing location: If the existing tub drain sits in the right spot for a shower pan, plumbing costs stay minimal. If the drain needs to move – or if corroded galvanized supply lines get discovered behind the wall, which happens regularly in Redwood City homes built before 1975 – expect $400 to $1,200 in additional plumbing work. This is the line item that surprises people most, and it’s one reason a written scope matters before anyone touches a wall.
- Existing wall substrate condition: A significant number of Redwood City bathrooms from the 1950s through 1980s were tiled directly over drywall rather than cement backer board. When the tub surround comes off, that drywall sometimes comes with it. Replacing the substrate with Durock or HardieBacker before waterproofing is the correct fix – skipping it leads to tile failure within a few years – and it adds $300 to $600 to the job.
- Shower size and footprint: A standard 60-inch tub alcove converted to a shower stays at exactly that dimension – 30×60 inches. Some homeowners in Redwood City choose to expand the opening slightly by removing a knee wall or borrowing a few inches from an adjacent closet, which adds framing labor and potentially a permit amendment. A true walk-in shower installation at a larger footprint starts around $4,500 and runs to $12,000.
- Tile selection and layout complexity: Subway tile set in a basic stacked bond is a day’s work per wall. Large-format tiles (anything over 18×18) require back-buttering, a flatter substrate, and more careful cutting around niches and valves – that extra labor adds $200 to $600. Herringbone or diagonal patterns add similar time. The tile itself ranges from $3 per square foot for basic ceramic to $18-plus for natural marble, which adds up fast in a 60-square-foot surround.
- Enclosure type: A tension rod and curtain costs almost nothing. A framed sliding door from a brand like DreamLine runs $400 to $600 installed. A frameless semi-custom glass enclosure starts around $900 and can reach $1,600 for wider openings with thick glass. Beyond price, frameless doors clean more easily and hold up better in Redwood City’s hard water – the Peninsula’s municipal supply runs around 150 ppm hardness, which leaves deposits on frames and tracks faster than soft-water markets.
- Permit requirements: The City of Redwood City requires permits when plumbing locations change – drain relocation and valve moves both trigger this. A permit adds $150 to $400 in fees and typically one inspection visit, but it also creates a record that matters if you sell the home. San Mateo County assessors and buyers’ inspectors look for permitted work, especially in bathrooms, so pulling the permit is rarely a step worth skipping.
Before
AfterIs a Tub-to-Shower Conversion Worth It in Redwood City?
In most Redwood City neighborhoods, yes – with a caveat. The Peninsula real estate market rewards updated bathrooms, and a tub that hasn’t been used in years is occupying space that a well-tiled walk-in shower would use daily. Realtors working the Woodside Road corridor and the Farm Hill area consistently note that dated tub surrounds are among the first things buyers flag in walk-throughs.
The caveat: if your home has only one bathroom and you plan to sell within two to three years, check with a local agent before converting. A small share of buyers – particularly families with young children – still prefer at least one soaking tub in the house. For everyone else, and especially for homeowners in Redwood City’s larger floor-plan neighborhoods like Emerald Hills, converting a second bathroom to a shower-only setup is straightforward and adds usable space without adding square footage.
For context, a full Tub-to-Shower Conversion in Redwood City through Rowan Construction Group comes with a written flat price, a signed change order process, and the 365-Day Done Right Promise – meaning if something isn’t right after the crew leaves, we make it right, backed by terms, not a handshake. That guarantee is printed on every contract and attached to a terms page you can read before signing anything.
How to Save on Tub-to-Shower Conversion in Redwood City
There are real ways to reduce the cost of this project without cutting corners on the waterproofing – the one area where cutting corners always costs more later.
- Keep the drain where it is. If your tub drain is centered on the short wall, which is the standard shower-drain position, you may not need any plumbing relocation at all. Confirming this before demo is part of what a proper site visit covers.
- Choose large-format tile from domestic stock. Imported 24×48 tile from an overseas supplier can be 40 percent cheaper than equivalent tile from a specialty showroom, and the quality is often identical. American Olean and MSI both supply through local distributors near Redwood City with shorter lead times and clearer warranty terms.
- Go prefab on the base. A prefabricated acrylic shower pan from Swanstone or Kohler installs in a fraction of the time a custom mortar bed requires, costs $400 to $800 less, and performs well for years when properly waterproofed at the perimeter seam. Unless you want a specific tile pattern on the floor, the prefab base is the smarter budget decision.
- Use a curtain or simple framed door first. If budget is tight, install a tension rod or a basic framed door now and upgrade to frameless glass in a year or two. The rough framing doesn’t change; the door upgrade is a separate job that costs $600 to $900 later without requiring any tile work.
- Bring a competitor’s quote for a free review. Rowan offers a Free Second Opinion on any written estimate – bring the line-item quote from another contractor and we’ll review it with you, point by point, at no charge. This is useful for spotting scope gaps (missing membrane, skipped permit, no allowance for substrate replacement) that turn a lower bid into a higher final invoice.
- Schedule during off-peak booking windows. Late January through early March tends to be lighter on the calendar for bathroom remodeling in Redwood City. Project scheduling is more flexible, and lead times on materials are shorter. Call (650) 560-7228 to ask about current availability – a live person answers, and a written estimate is the first deliverable from any conversation, not a follow-up email three days later.
Tub-to-Shower Conversion vs. Other Bathroom Projects: How the Cost Compares
It helps to see this project in context with the other bathroom work Redwood City homeowners typically consider at the same time.
- Tub-to-Shower Conversion: $3,500 – $10,000 (this page)
- Walk-In Shower Installation (new construction, larger footprint): $4,500 – $12,000
- Shower Replacement (existing shower, new surfaces): $3,000 – $8,500
- Bathroom Vanity Installation: $800 – $3,000
- Small Bathroom Remodel (toilet, vanity, tub-to-shower, tile): $5,000 – $12,000
- Full Bathroom Remodel (layout change, all surfaces, new fixtures): $9,000 – $28,000
A tub-to-shower conversion sits in the middle of this range by design. It’s a defined scope – one fixture out, one fixture in, new waterproofing, new surfaces – and that definition is why the price range is tighter than a full remodel. When homeowners in Redwood City’s older housing stock start pulling at the tub surround and discover rotted framing or failed subfloor, the scope can grow. That’s exactly why signed change orders matter: under the Haven Standard, no additional work proceeds until the expanded scope is priced in writing and you’ve approved it. No surprises billed at the end.
If you’re also thinking about a vanity update or new tile on the floor, bundling that work into one project usually saves 10 to 15 percent on labor because the contractor’s setup time – protection, demo, materials staging – is shared across a larger scope. More on that in our broader guide to home renovation planning.
What the Process Looks Like: From First Call to Finished Shower
Knowing the sequence helps you plan around it. Here’s how a tub-to-shower conversion typically runs in Redwood City with Rowan Construction Group.
Step 1: Site Visit and Written Estimate
A uniformed, background-checked technician visits the bathroom, photographs the existing tub surround, substrate, and drain location, and takes measurements. The photo record starts here and follows the project through completion – you receive copies as a standard deliverable. A flat written price and scope arrive within 48 hours of the visit. No phone promises, no ballpark ranges.
Step 2: Material Selection
Tile, base, fixtures, and enclosure type are confirmed before any permits are pulled. Grant Rowan’s sourcing network covers fifty-plus vetted brands, which means the written quote reflects actual material costs rather than inflated allowances. If you want Kohler Artifacts fixtures and a Schluter-framed niche in natural stone, we can price that exactly. If you want a clean, durable conversion under $5,500, we can price that exactly too.
Step 3: Permits (When Required)
When the drain or valve moves, permits are pulled from the City of Redwood City before demo starts. This typically adds three to seven business days to the project start date. If no plumbing location changes, permits may not be required for the conversion itself, though we document the decision either way.
Step 4: Demo
The tub comes out. This is often where the real condition of the wall substrate becomes visible. If the backer board is compromised – which happens in Redwood City homes where a prior owner caulked rather than repaired a leaking tub edge – that’s photographed, priced as a change order, and approved by you before any additional work begins. Standard cast-iron tub removal is a two-person, half-day task. Acrylic one-piece surrounds typically come out faster.
Step 5: Waterproof Membrane and Backer
This is the layer most homeowners never see but the one that determines whether the shower holds up for ten years or three. Cement backer board (Durock or HardieBacker) goes in first, then a continuous waterproof membrane – we specify Schluter Kerdi sheet membrane or a liquid-applied equivalent, depending on the substrate geometry. The membrane extends at least 6 inches above the finished pan height on all walls, with corners sealed before any tile is set.
Step 6: Tile and Fixtures
The shower pan or mortar bed is set, then wall tile, then trim and fixtures. Grout is sealed on completion. Frameless glass, if specified, is typically a subcontracted measurement-and-fabrication step that adds three to five business days after tile is done – glass is templated to the actual finished opening, not the rough framing.
Step 7: Documented Close-Out
Every visit ends with a photo record. At project close, you receive the final photo set, copies of any permits and inspection sign-offs, and the written warranty under the 365-Day Done Right Promise. The promise is specific: if something is not right within the year, we return and fix it. The terms are on paper.
FAQs – Tub-to-Shower Conversion Cost in Redwood City
How much does a tub-to-shower conversion cost in Redwood City, CA?
A tub-to-shower conversion in Redwood City costs $3,500 to $10,000, with most projects landing between $5,000 and $7,500. The low end reflects a prefab base with acrylic surround panels and basic fixtures. The high end reflects custom tile walls, a mortar-bed floor, frameless glass, and premium fixtures like a Kohler or Grohe valve set. Call (650) 560-7228 for a written flat-price estimate specific to your bathroom – the estimate is free and arrives before any work is discussed.
How long does a tub-to-shower conversion take in Redwood City?
Most tub-to-shower conversions in Redwood City take three to seven business days from demo to finished tile. Add one to two days if a frameless glass enclosure is specified, since glass is templated and fabricated to the finished opening after tile is set. Jobs that require permit-triggered inspections from the City of Redwood City may add a few days around the inspection scheduling window. A prefab surround conversion with no plumbing relocation can be done in two to three days.
Do I need a permit to convert a tub to a shower in Redwood City?
A permit from the City of Redwood City is required when plumbing locations change – specifically when the drain or shower valve moves from its existing position. Cosmetic retiling of an existing tub surround converted to a shower pan, with the drain staying in place, may not require a permit, but this is confirmed on a job-by-job basis during the site visit. Pulling permits when required creates an inspection record that protects your home’s value when it sells – San Mateo County buyers’ inspectors and appraisers check for unpermitted bathroom work.
Is it cheaper to replace a shower or convert a tub to a shower?
A shower replacement – removing an existing shower and installing new surfaces – typically costs $3,000 to $8,500 in Redwood City. A tub-to-shower conversion costs $3,500 to $10,000. The ranges overlap, and the actual cost difference comes down to scope: converting a tub requires tub removal and sometimes drain relocation, while replacing a shower usually has a drain already in the right position. If your existing bathroom has a tub you never use and no shower, conversion is the right path – it creates the fixture you want from the space you already have.
Can Rowan Construction Group convert my tub to a shower in Redwood City?
Yes. Tub-to-shower conversion is part of Rowan Construction Group’s bathroom remodeling trade, and we’ve completed this project type across Redwood City neighborhoods including Emerald Hills, Horgan Ranch, and the Farm Hill area. Every project starts with a free written estimate – a flat price with a written scope, not a range or a per-hour quote. Call (650) 560-7228 to schedule a site visit; a live person picks up, and the written estimate is the first thing that comes out of any conversation.
What tile is best for a tub-to-shower conversion?
Glazed ceramic and porcelain tile are the two most practical choices for a Redwood City tub-to-shower conversion. Both are dense enough to shed the mineral deposits from San Mateo County’s moderately hard water, and both hold up without sealing (unlike natural stone). Porcelain with a rectified edge – meaning the tile is ground to a precise dimension after firing – allows tighter grout joints (1/16 inch), which reduces the surface area where hard water deposits accumulate. Natural marble and travertine look good but need annual sealing to resist the Peninsula’s water chemistry. For shower floors specifically, mosaic tile (2×2 or penny rounds) provides more grout joints for grip – which matters more than aesthetics on a wet surface.
Key Takeaways
- Tub-to-shower conversion in Redwood City costs $3,500 to $10,000; most jobs fall between $5,000 and $7,500.
- Drain relocation is the line item most likely to push costs toward the high end – confirm drain position during the site visit before agreeing to a price.
- Older Redwood City homes (pre-1975) often have drywall rather than cement backer behind tile surrounds; substrate replacement adds $300 to $600 but is not optional if the existing backer is compromised.
- Permits are required when plumbing moves; City of Redwood City fees run $150 to $400 and create an inspection record that protects resale value.
- A prefab acrylic base saves $400 to $800 over a custom mortar-bed-and-tile floor without meaningful performance trade-offs for most households.
- The 365-Day Done Right Promise and written flat pricing come standard on every Rowan project – confirmed in the signed contract, not mentioned verbally and forgotten.
- Rowan’s Free Second Opinion offer lets you bring any competitor’s written estimate for a line-by-line review at no cost.
Grant Rowan and the team at Rowan Construction Group have been delivering written-price bathroom projects since 2007, and the tub-to-shower conversion is one of the most requested jobs in Redwood City’s aging single-family housing stock. If you’re ready to see a flat written price for your bathroom – not a range, not a per-hour quote – call (650) 560-7228. The estimate is free, it comes with a written scope, and no work starts until you’ve agreed to the number in writing.
Pricing reflects the Redwood City market as of 2026. Rowan Construction Group Redwood City offers free estimates – call (650) 560-7228.
Written by Grant Rowan, Owner at Rowan Construction Group, serving Redwood City since 2007.
What Our Customers Say
"Fence and retaining wall along a sloped boundary. They photographed the footing depth at each post, which mattered when the county inspector came."
- Iona F."Talked us out of the larger scope we came in asking for, because it would not have added the value we thought."
- Emil R."Final invoice was within two percent of the contract. Every change was priced and signed before anyone picked up a tool."
- Malcolm T.