· Cost drivers and published fees
Why this page has no price list
Most “bathroom remodel cost” pages give you a national average dressed up as a local one. We would rather be useful than confident: the same 5×8 bathroom can be a panel-and-glass replacement that leaves the plumbing alone, or a rebuild that moves a drain, rewires the room and rebuilds the subfloor. Those are not the same job, and one range cannot honestly describe both.
What we can do is give you every number that is a matter of public record, plus the ordering of the decisions that actually move your price. Then we write you a line-item estimate for your room, and you compare that to other line-item estimates rather than to an average.
Rank the scope before you rank the dollars
Across the work we do, cost follows scope in a consistent order, from least to most:
- Finish refresh. Nothing moves. Vanity, mirror, lighting, paint, flooring, maybe a new shower door on a sound enclosure.
- Shower rebuild in place. The enclosure comes out to the studs and goes back as acrylic, porcelain or quartz with new glass. Drain and valve usually stay where they are.
- Tub-to-shower conversion. The tub, surround and valve come out, the drain moves to suit a shower base, and blocking goes in for a seat or grab bars. More plumbing, more inspection, more risk of what the tub was hiding.
- Full bathroom rebuild with the layout intact. Shower, tub, vanity, floor, ventilation, lighting and electrical all replaced as one coordinated project.
- Rebuild with a layout change. Walls or fixtures relocated, drains re-routed, framing altered. Every trade comes back more than once, and the plan review is real.
That ladder is more useful than a dollar figure, because it tells you which decision to revisit if the estimate comes back higher than you hoped. Dropping a tier almost always saves more than substituting a cheaper fixture inside the same tier.
The wall system is the biggest single decision
We install three, and they behave differently on both the invoice and the calendar:
One-piece acrylic panels.Each wall is one panel: no grout to stain or reseal, and the least labour on site. A window inside the shower can be wrapped with a matching trim return. The trade-off is design freedom — niches and accents come from the manufacturer's range rather than being built to size.
Large-format porcelain tile. The most design choice: marble-, stone- or plain-look porcelain, a niche sized to your bottles, a pebble or mosaic floor for grip. It needs a waterproofing layer behind it and a tile setter, and grout and mortar need cure time, so it is more hours than acrylic.
Solid quartz panels. Stone-like, very few joints, nothing to seal. It costs more than acrylic and the niche has to be planned before the slabs are cut, because the panels are templated and fabricated off site.
Glass is the second-order version of the same decision. A sliding door on a standard alcove, a frosted panel in a shared bathroom and a fixed panel with an open entry are three different numbers — and whichever you pick, glass in a shower or tub enclosure is a hazardous location under the California Residential Code (§R308.4.5) and has to be safety glazing.
What your permit costs, by authority
This is the part of the price that is genuinely public. Six offices issue building permits across the territory we work — Nevada City routes through one of them — and none of them price a bathroom the same way.
| Authority | How a bathroom permit is priced |
|---|---|
| City of Auburn | Valuation table. $250 for the first $2,000 plus $6.52 per additional $1,000 to $25,000; $400 for the first $25,000 plus $14 per additional $1,000 to $50,000; $750 for the first $50,000 plus $10 per additional $1,000 to $100,000. Add 10% of the base fee each for plumbing, electrical and mechanical inspection, a $70 permit processing fee, a state seismic fee of $0.50 or valuation × 0.00013, and a $1–$2 state Building Standards fee. Plan review, where required, is 65% of the permit fee and covers up to three plan checks. |
| Nevada County | Priced per inspection visit, by activity. A tile-lined shower or tub is three units — frame, board-and-pan, and final — at $556.44 in FY 25/26, with plumbing for the shower included. Plumbing or electrical alteration on its own is two units ($370.96). Add permit processing ($92.74 over the counter, $185.48 otherwise), seismic at $0.13 per $1,000 of construction value, and the small state fees the schedule lists ($1 Building Standards, $4 CASp). Covers Lake of the Pines, Alta Sierra, Lake Wildwood, Penn Valley and — by contract — Nevada City. |
| Placer County | Unincorporated North Auburn, Meadow Vista, Newcastle and Penryn. The county applies its own adopted building fee schedule; we confirm the current figure with Building Services when we price the permit. See our Placer County permit guide. |
| Town of Loomis | Its own building division. The town states that permit fees are based on building valuations, generally using published building-official valuation data, and posts the current construction fee schedule on its building fees page. |
| City of Colfax | The city's building department handles construction, improvement and remodeling inside city limits; fees are not published on its building page, so we confirm them at application. |
| City of Grass Valley | The city's building department runs plan review, permit issuance and inspections for all properties inside the city. Note that an Alta Sierra address reads “Grass Valley, CA 95949” but permits through Nevada County. |
| Nevada City | The city contracts with Nevada County for building department services: you apply with the city first, then the city-approved plans go to the Nevada County Building Department, which issues the permit. |
A worked example, because the Auburn table is hard to read cold. On a remodel the Building Official values at $40,000, the base permit fee is $400 plus fifteen increments of $14 — $610. Plumbing and electrical inspection add 10% each, $61 apiece. With the $70 processing fee, the $5.20 seismic fee and the $2 Building Standards fee, the permit side lands near $809, before any plan review. That is a real number you can check against the published schedule — and it is a fee paid to the city, not to us.
Permit cost is also why the authority question matters before anyone talks timeline. Our service territory guide maps which office issues your permit, and the detailed guides cover the City of Auburn, Placer County, Nevada County and the City of Grass Valley.
Pre-1994 homes: the cost line nobody warns you about
California Civil Code §1101.4 makes replacing noncompliant water fixtures a condition of final permit approval when you alter or improve a single-family home that was built and available for use on or before 1 January 1994. Noncompliant means a toilet over 1.6 gallons per flush, a showerhead over 2.5 gpm or an interior faucet over 2.2 gpm (§1101.3). Plenty of Auburn, Colfax and Nevada City housing predates that line by decades.
The practical effect is that a permitted bathroom remodel can oblige you to change fixtures in a bathroom you were not remodeling. It is rarely a large sum, and it is always cheaper as a planned line item than as a surprise at final inspection — so we check the rest of the house while we are measuring. New showerheads have their own limit: under California's appliance efficiency regulations, heads manufactured on or after 1 July 2018 are capped at 1.8 gpm.
What demo uncovers, and how we price the risk
An estimate that assumes demo will find nothing is not a lower price, it is a later argument. Four conditions turn up often enough that we price them explicitly as conditional items where the signs are there:
- Subfloor. Tubs hide slow leaks. Soft or delaminated subfloor gets replaced or reinforced before any new waterproofing goes down, and the new shower pan has to be tested watertight by filling it to the rough threshold (California Plumbing Code §408.7.5).
- Supply pipe. Galvanized or mixed-material supply lines show up in older foothill homes. If the wall is already open, replacing the run is cheap compared with doing it later through finished tile.
- Ventilation. Bathroom exhaust has to discharge outside the building. Fans ducted into an attic are common in older homes, and correcting that is a small line item with a large effect on how long the finishes last.
- Electrical. Bathroom receptacles have to be GFCI-protected under the California Electrical Code, and older rooms often need a circuit brought up to standard as well as shower-rated lighting.
Code items that are line items, not upgrades
These belong in every quote you receive, and if one estimate is conspicuously cheaper, this is the first place to look for the difference:
- A shower with at least 1,024 square inches of finished interior that can also contain a 30-inch circle (CPC §408.6) — which is why a standard 60-inch tub alcove usually converts without stealing space from the room.
- A pressure-balance, thermostatic or combination shower valve limited to 120°F (CPC §408.3). The valve is not where to save money.
- Waterproofing behind tile and a pan tested watertight before the walls close, plus the rough plumbing inspection that goes with it.
- Safety glazing in the shower or tub enclosure (CRC §R308.4.5).
- Exhaust ducted to the exterior, GFCI protection, and permit inspections at rough and final.
One thing you can cross off the budget
Foothill water here is soft, not hard. PCWA — which serves Auburn, North Auburn and Newcastle from the Auburn/Bowman system and Loomis from the Foothill/Sunset system — classes water under 60 mg/L as soft, and its Foothill/Sunset average is around 21.75 mg/L. The film that builds up on shower glass here is soap scum, not mineral scale, so you do not need to budget for a softener to protect new glass. Private wells are a per-parcel question, and iron staining of light grout is the issue worth asking about there.
What a written estimate has to contain
California sets the floor, and it is a good checklist for comparing bids. Under Business and Professions Code §7159, a home improvement contract over $500 must be in writing and must include the contractor's name, address and licence number, the contract amount in dollars and cents, a description of the project and of the significant materials and equipment to be installed, approximate start and completion dates, a schedule of payments referencing the work each payment covers, a requirement that change orders be written and signed before that work starts, the mechanics lien warning, insurance and CSLB notices, and the notice of your right to cancel within three business days — five if any signer is 65 or older.
Payments are also constrained. §7159.5 caps the down payment at $1,000 or 10% of the contract amount, whichever is less, and bars a contractor from requesting or accepting payment beyond the value of the work performed or material delivered. A large up-front demand is a red flag, not a discount.
Beyond the statutory minimum, ours names the wall system and the specific panel, tile or slab, the glass type and how it is mounted, the base or pan and drain type, what happens to the window inside the shower, which fixtures are being replaced under §1101.4, and which authority issues the permit. Our workmanship is covered by a 3-year warranty; manufacturer warranties on products vary separately.
Request a free consultation and we will measure the room, tell you which authority issues the permit, and put the whole thing in writing as line items.
