Updated July 5, 2026 · 9 min read
The short answer
A solid bathroom remodel contract spells out the exact scope of work, whether the price is fixed or uses allowances, a payment schedule tied to milestones (not paid upfront), how change orders get approved in writing, a written workmanship warranty term, and proof of insurance plus lien-waiver protections. This isn’t legal advice — for contract disputes, consult a construction attorney.
Key takeaways
- This is about reading the document itself, not vetting the person — pair it with our contractor-vetting checklist for the conversation before you get a contract at all.
- Know whether you’re signing a fixed price or a price with allowances for materials you haven’t chosen yet — the difference decides who absorbs a cost overrun.
- A reasonable payment schedule ties installments to completed milestones; a request for most of the money upfront is a red flag, not a norm.
- Change orders should be written and signed before the new work starts — a verbal "we’ll settle up at the end" is not a change order.
- Idaho law requires general contractors on jobs over $2,000 to disclose your right to lien waivers and proof of insurance in writing — make sure both actually show up in the contract, not just the disclosure form.
This is about the paper, not the person
Our guide on questions to ask a bathroom remodeling contractor covers how to vet the person before you hire them — credentials, references, how they talk about their process. This guide picks up after that conversation goes well, once you actually have a contract in front of you. A contractor can say all the right things out loud and still hand you a one-page document with a lump-sum number and nothing else. The questions protect you from a bad hire; the contract itself is what protects you once work is underway.
None of this is legal advice, and it isn’t meant to replace one when you need it. It’s a practical checklist for what a reasonably protective bathroom remodel contract should contain. If you’re looking at contract language you don’t understand, or you’re already in a dispute, that’s a conversation for a real estate or construction attorney — not a blog post.
Scope of work: get the specifics in writing
The scope section is where vague contracts fail homeowners. It should describe, in detail, what’s being demolished, what’s being installed, and the specific materials involved — not just "tile shower" but the brand, model, dimensions, and finish of the tile, fixtures, and vanity being used. If your estimate was based on a set of drawings or a materials list, that document should be incorporated into the contract by reference, not left as a separate piece of paper that could quietly drift from what actually gets built.
A written start date and a projected completion date belong here too, along with a clear line for what’s explicitly excluded from the bid. Two contractors bidding the "same" project can produce very different numbers because one bid excludes something the other includes — the exclusions list is how you catch that before you sign, not after the first invoice.
Fixed price vs. allowances: know which one you’re signing
A fixed-price contract locks in a single total for the defined scope — if every material and finish has already been chosen, this is the more predictable option. An allowance is different: it’s a placeholder dollar figure written into the contract for something you haven’t picked yet, most often tile, a vanity, lighting, or plumbing fixtures. If your final selection costs more than the allowance, you owe the difference; if it costs less, the contract price should be credited downward by the same amount.
Allowances aren’t a red flag by themselves — they’re often unavoidable if you haven’t finalized every finish before signing. What matters is that the contract states each allowance amount specifically, tied to a specific item, rather than a single vague "materials allowance" covering several categories at once. Ask directly whether the allowance is based on the contractor’s actual cost or already includes markup, since that changes what a credit for choosing a cheaper item should look like.
Payment schedule: tied to milestones, not paid upfront
This Old House’s guidance on hiring a contractor lays out a payment structure worth using as a benchmark: roughly 10% at signing, three progress installments of about 25% each tied to project phases, and a final 15% held until the work is complete. The exact percentages can vary by project and contractor, but the underlying principle shouldn’t: payments should follow completed work, not precede it, and a large share of the total should remain outstanding until the punch list is done.
A request for most of the money before work begins is one of the more reliable warning signs in this entire process. If a contractor needs a larger deposit to purchase custom materials up front, that’s a reasonable ask — but it should be stated as such, tied to a specific material cost, rather than framed as a standard deposit.
What Boise Bath puts in writing
Every Boise Bath contract states scope, price type, payment milestones, and warranty terms in writing before work begins — including the 3-year workmanship warranty described below. See our full warranty coverage.
Change orders: written and approved before the new work starts
Older homes especially tend to reveal surprises once walls open — that isn’t a reason to skip the change-order process, it’s the reason it exists. A change order should describe the added or changed work, its cost, and any effect on the schedule, and it should be signed by both you and the contractor before that work begins, not settled informally at the end of the project. This Old House’s contractor-hiring guidance is direct that any change to price or scope should be documented in writing as it happens.
If a contractor tells you not to worry about paperwork for a small change, that’s worth pausing on — the changes that get skipped on paper are exactly the ones that turn into disputes over the final invoice.
Warranty terms: get the length and the coverage in writing
A workmanship warranty is a written promise about the labor, separate from whatever warranty the manufacturer offers on the tile, fixtures, or glass itself. Look for a specific term length and a plain description of what "workmanship" covers — issues that trace back to how something was installed, not normal wear or a manufacturer defect. A verbal warranty, or a vague "we stand behind our work" with no term attached, isn’t something you can act on later.
Boise Bath backs every project with a written 3-year workmanship warranty — the specifics of what’s covered are laid out on our warranty page, and it’s a reasonable benchmark to compare against any contract you’re reviewing.
Lien releases and insurance proof: your Idaho-specific protections
Idaho law gives homeowners specific, written protections here, and they should show up in your contract, not just in a separate disclosure form. Idaho Code § 45-525 requires any general contractor on a residential job over $2,000 to disclose, in writing, that you have the right to require the contractor to obtain lien waivers from subcontractors, the right to receive proof of the contractor’s general liability and workers’ compensation insurance, and the right to request a surety bond covering the project. Failing to provide that disclosure is itself an unlawful and deceptive practice under Idaho’s Consumer Protection Act.
In practice, that means your contract should include a mechanism for collecting signed lien waivers from subcontractors and suppliers as each payment is made — not just a promise that liens "shouldn’t" happen — plus current certificates of general liability and workers’ comp insurance attached or referenced directly. If a lien is ever filed on your property despite this, Idaho Code § 45-518 provides a process for releasing it by posting a bond, but that’s a legal proceeding, not a DIY step — it’s exactly the kind of situation where you’d want an attorney, not this checklist.
| Section | What it should state |
|---|---|
| Scope of work | Specific materials, brands, dimensions, start/completion dates, exclusions |
| Price type | Fixed price, or itemized allowances with clear amounts per item |
| Payment schedule | Milestone-based installments; no large sum due upfront |
| Change orders | Written, priced, and signed before the new work begins |
| Warranty | A specific written term (e.g. 3 years) and what "workmanship" covers |
| Lien releases | A process for collecting signed subcontractor lien waivers at each payment |
| Insurance proof | Current certificates of general liability and workers’ comp attached |
When to bring in an attorney
This checklist covers what a well-written contract should contain — it isn’t a substitute for legal review. If you’re signing a large project, reviewing unfamiliar contract language, or already dealing with a dispute over a lien, a missed change order, or a warranty claim, that’s the point to consult a licensed Idaho attorney rather than relying on a checklist. The Idaho Division of Occupational & Professional Licenses can confirm a contractor’s registration status, but it isn’t a substitute for legal advice on contract disputes either.
When you’re ready to see what a written-in-advance scope, payment schedule, and warranty actually look like, request a free estimate and we’ll walk through the contract terms before anything is signed.
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Frequently asked questions
- What’s the difference between this and your questions-to-ask-a-contractor checklist?
- The [questions to ask](/guides/questions-to-ask-bathroom-remodeling-contractor) guide is about vetting the person before you hire them — credentials, references, how they talk through their process. This guide is about the document itself, once you have a contract to review: the specific scope, price type, payment schedule, change-order process, warranty terms, and lien and insurance protections that should actually be written down.
- Is a verbal agreement enough for a bathroom remodel?
- No. Every material term — scope, price, payment schedule, warranty — should be in a signed, written contract. A verbal promise isn’t enforceable in the same way, and it gives you nothing to point to if a dispute comes up later. This isn’t legal advice, but it’s a near-universal recommendation across contractor-hiring guidance for exactly that reason.
- What warranty should be in a bathroom remodel contract?
- Look for a specific written term length and a plain description of what "workmanship" covers, separate from manufacturer warranties on materials and fixtures. A 3-year workmanship warranty, in writing, is a reasonable standard — it’s what Boise Bath puts in every contract, detailed on our [warranty page](/warranty). A contract with no stated warranty term, or one offered only verbally, is a gap worth asking about before you sign.
Sources
- This Old House — 8 Pro Tips on How to Hire a Contractor
- Idaho Legislature — Title 45, Chapter 5: Liens of Mechanics and Materialmen (incl. § 45-525 disclosures, § 45-518 lien release)
- Idaho Division of Occupational & Professional Licenses
Claims and figures are drawn from the sources above and provided for general guidance; your project may vary. Photography is illustrative of design concepts. For a fixed price on your specific bathroom, request a free estimate.
