Bathroom Renovation Scope of Work: Draft Room-by-Room Lines With AI

Write the scope as numbered lines for each room, and give every line its work and specification, what is included or excluded, who supplies the materials and whether the amount can move. AI can draft the lines from your site notes; you supply the measurements and limits, then read it as the customer would.

Disputes rarely start with big items. They start with small words: "retile the bathroom", "make good", "supply and fit", "standard fittings". A scope line is finished when a customer who assumes the most generous meaning and a fitter who assumes the least would still read it the same way. That is the test every line below has to pass.

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For the worked scope, take a two-bathroom house. The family bathroom (9 by 7 ft) gets a new walk-in shower, and the cloakroom (5 by 4 ft) gets a new toilet and basin. The customer supplies the vanity unit and the cloakroom tiles; everything else is the fitter's. All specifications and amounts are illustrations.

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Start from site notes, not from a template

A template gives you headings. Site notes give you facts, and the facts are what make a scope enforceable. Take them at the visit, in the order you will build the job, and record measurements as numbers. Spoken notes work well if you transcribe them afterwards; Turning On-Site Voice Notes Into Job Sheets and Quotes With AI shows that step. For the example house, the notes might read:

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• Family bathroom, 9 by 7 ft. Remove bath, vanity, toilet, floor tiles and wall tiles. Timber floor; moisture reading normal near the bath, high near the toilet flange.
• New: walk-in shower 4 by 2.5 ft with a fixed glass panel; floor tile over 63 sq ft; shower walls tiled to the ceiling, other walls to 4 ft (147 sq ft of wall tile in total); wall-hung vanity supplied by the customer; new toilet supplied by us.
• Existing soil stack stays where it is. Fan and mirror light to be fitted by an electrician.
• Cloakroom, 5 by 4 ft. New wall-hung toilet and basin supplied by us. Customer supplies the wall tile and wants it laid to 4 ft, about 60 sq ft of wall.
• Customer has not chosen floor or wall tile for the family bathroom yet.

Notice what is already clear and what is not. The soil stack, the supply split and the tile areas are decided. The tile choice is open, and that open item will become a provisional line. Writing the notes this way means the scope can say so.

Give every line five parts

Start with what goes wrong. This is the kind of one-line scope that circulates in small firms:

Bathroom renovation including new tiles, toilet, vanity and shower: $18,400.

It leaves at least nine questions open. Which bathroom, or both? Who buys the tile, and at what price per square foot? Whose vanity is it? Is the shower a walk-in, and is the glass included? Who pays for what is found under the floor? Is painting included? Does the electrician's work come with it? What counts as finished? When is each payment due? The dispute can run like this: the customer assumes the $18,400 covered tile for both rooms and the glass panel, while the fitter assumes the cloakroom tile was the customer's, as discussed in conversation, and priced the glass as an extra. Both are being honest. Neither assumption is in the document.

A line that carries five parts leaves very little to argue about. The parts are the same for every room, which makes the scope easy to read and easy to check.

Numbering matters more than it looks. When a customer says "I thought the shower tile was included", you can answer with "line 1.6" instead of a memory of a conversation. It also lets you tie stage payments to lines: "after lines 1.2 to 1.5 are complete" is clearer than "after the first fix", and Builder Invoice Template: Stage Payment Requests Written With AI picks that up on the invoicing side. Here is how it looks on the example job, priced at $18,400 for both rooms:

The percentages are yours to set, and rules on deposits and stage payments differ between places, so check yours. The useful column is the middle one: each payment names the lines that justify it, so "is it finished?" has a document to point at. Notice that line 2.2 sits in the completion stage even though its frame and pipework go in at first fix: a wall-hung toilet and basin are hung after the tiling, so the line is not complete until then. Mapping lines to stages is how you catch that kind of mismatch before the customer does.

Prompt: site notes in, room-by-room lines out

The prompt below is built to stop an assistant doing what it does naturally, which is to fill gaps with plausible detail. It makes the assistant write ASK instead of assuming, and it asks for its assumptions at the end.

You are drafting a scope of work for a bathroom renovation firm. Use the
SITE NOTES only. Produce numbered lines for each room (1.1, 1.2 ... then
2.1 ...). Each line needs: work and specification; included or excluded;
supplied by (contractor, client or not applicable); amount type (fixed,
provisional sum, allowance or client-supplied).
Where the notes lack a measurement or specification, write ASK and name
the missing item instead of assuming. Do not add work that is not in the
notes. After the lines, list every assumption you made.

SITE NOTES:
[paste your notes here]

Here is part of what comes back for the family bathroom, trimmed:

It is a good first draft, and the ASK entries are the best part: it noticed that a tile size is missing and that nobody has said how many snagging visits are included. Four things still need a human. First, "to ceiling" in the shower comes from your notes, so check it against the drawing, because the assistant cannot see the room. Second, it wrote "included" against the electrician's certificate where your own policy might charge for it. Third, it said nothing about painting, which is the classic silent gap, so you add an exclusion. Fourth, in a line not shown here it described the glass panel as supplied by the contractor with no lead time. Read every line for what it commits you to, not for how it sounds.

The same prompt for the cloakroom returns five lines:

The interesting line is 2.3, and its second column is doing real work. Without the 66 sq ft figure, a customer who orders exactly 60 sq ft discovers halfway through the job that cutting waste needs six more, and the delay becomes your fault in their memory. Line 2.5 is the opposite case: an exclusion written as a line of its own, so the gap is visible in the same table as the work.

Exclusions matter more than inclusions

Customers read inclusions as promises and exclusions as surprises. If you want to avoid the surprise, write the exclusions yourself, in plain words, in the same document. This list is a starting point for a bathroom; adapt it to your own jobs and have the wording checked where you work.

• Painting and decorating, other than sealant and touch-up in the bathroom itself.
• Testing or removal of asbestos, lead paint or other hazardous materials.
• Structural work, including repair of joists or beams.
• Moving or enlarging the existing soil stack, or other drainage outside the room.
• Repair of hidden defects behind walls or under floors beyond the provisional sums in this scope.
• Electrical work beyond the lights and fan listed, and any certificate for other circuits.
• Permit or building-control applications and their fees, unless listed. If the job needs one, add a line that says who applies, who pays the fee and who books the inspections.
• Making good to other rooms, the landing or ceilings below, except where listed.
• Moving, storing or protecting furniture and personal belongings.
• Window, door or radiator replacement unless listed.
• Accessories not listed, such as rails, hooks and mirrors.
• Delay or extra visits caused by late, damaged or incorrect client-supplied items.

Two checks keep the list honest. An exclusion must not contradict an inclusion: if line 1.6 says "walls tiled to ceiling" and the exclusions say "making good to ceilings", the customer will ask who fixes the cracked paint at the tile edge. And exclusions have to be visible: a list buried on page seven of the terms does not do the job. Put them in the scope, beside the lines they limit.

Provisional sums and allowances: wording and a worked bill

A provisional sum is an amount you include for work or materials that cannot be defined yet. An allowance is a close relative, usually for a product the customer has not chosen. The rules are the same for both, and four things must be written down: what the sum covers, how the final amount will be measured, when the customer must decide and what happens to the difference. Here is wording for the tile in the family bathroom:

Tile allowance (line 1.6). The price includes $6.50 per sq ft for tile
supply, for 231 sq ft (210 sq ft laid plus 10% for cutting waste),
a total of $1,501.50. Adhesive, grout, trims and delivery are not part
of the allowance and are included in the fixing price. The customer will
choose the tile by [date]. If the chosen tile costs more or less than
$6.50 per sq ft, the difference multiplied by 231 sq ft is added to or
credited against the final invoice. A different pattern or a larger tile
changes the waste figure and will be agreed in writing before ordering.

The sums that follow from it are simple, which is the point:

Without the definition the same choice becomes an argument. The customer assumes the allowance covered "the tile", full stop, including whatever amount they need; you assumed it covered 210 sq ft at one price and nothing for waste. Writing the quantity and the waste into the clause settles both readings before they exist.

A second provisional sum shows the other style. If you open the walls and find corroded valves or old pipework, you may need to replace them. The scope says: "Provisional sum of $750 for replacement of corroded valves or pipework found behind the walls, charged at actual cost plus 15% and shown on the invoice with receipts." If the work costs $410, the charge is $471.50 and the customer is credited $278.50. If it costs $820, the charge is $943 and they pay $193 more. In both cases the invoice shows the sum, the actual figure and the difference. For a longer treatment of allowances through a whole home build, Home Builder Selection Sheet: Track Allowances and Deadlines With AI is the one to read.

Client-supplied items: arrival dates, checks and who carries the risk

When the customer buys the vanity, tiles or screen, three questions need written answers: when does it arrive, who checks it and who carries the risk if it is wrong? A short supply schedule inside the scope answers all three.

Client-supplied items. We will fit the items listed above as client-supplied
but cannot guarantee them. Faults in the item itself are between you and
the seller or manufacturer; we are responsible for our fitting. If an item
is late, damaged or incorrect, we will tell you the same day. Extra visits
and storage caused by this are charged at our day rate. We recommend you
order [10]% extra tile from a single batch.

The three failures that recur are worth naming. A vanity arrives with pre-drilled holes that do not match the pipe positions. A tile order comes up short by one box, and the next batch is a different shade. A tray arrives a fraction of an inch smaller than the opening. The schedule does not prevent any of them, but it stops a delay or an extra visit becoming a grievance.

Let AI play the customer and hunt for loose words

Once the lines exist, ask an assistant to read them as the most hopeful customer in the world. This catches loose words faster than a second read by you, because you know what you meant.

Read this bathroom scope of work as a customer who wants as much as
possible included. List (1) every assumption you would make that the
fitter might not, (2) every word or phrase that could mean two things,
and (3) any line where you cannot tell who supplies the materials or who
pays if the amount changes. For each, propose clearer wording.

SCOPE:
[paste the scope here]

A typical reply flags the phrases below. They are worth keeping as a standing list of words to search your own scopes for:

It will also tell you things you did not ask. One reply may point out that nothing says who removes the packaging from the customer's vanity unit, or that the scope never says what hours you work. Not every suggestion earns a line, so keep the ones that would otherwise be argued about, and drop the rest.

From scope to variations: change control in four lines

Every scope changes, because customers change their minds and walls hide things. What separates a calm change from a dispute is whether it was priced and agreed before the work happened. Four lines do most of the job:

Changes. Any change to this scope will be agreed in writing, with its
price and its effect on the programme, before the work starts. Work that
is not in this scope and not agreed in writing is not included. We will
give you a written price within [two] working days of a request. The
scope will be re-issued with a new version number after each change.

An assistant is useful for the variation notices themselves: give it the line number, the change and the price, and it will write a one-paragraph notice with the knock-on effect on the date. Here is one for the example job, after checking:

Variation 1 to scope v1, line 2.3. You have asked for the cloakroom wall tile to run to the ceiling instead of 4 ft. That adds about 60 sq ft of tiling at $14 per sq ft for fixing, $840 in total, and you will need about 66 sq ft more tile, which you supply as before, ideally from the same batch as the first order. It adds one working day, so completion moves from [date] to [date]. Reply "agreed" and we will go ahead and re-issue the scope as v2.

A first draft of a notice like this often says "a small additional charge" and "minimal disruption to the programme". Replace both with the figures, because those are the two phrases a customer argues about later, and check the tile quantity yourself, since the assistant simply repeats whatever area you give it. If the first batch has sold out, say so in the notice: a second batch can differ in shade, and the customer should decide before the tile is ordered, not after it is on the wall.

For pricing the change itself, How Small Builders Use AI to Price Variations and Change Orders goes into more depth, and when the job ends, Practical Completion Certificate: What Each Clause Means, Then an AI Draft deals with how "complete" gets agreed. The estimate behind the scope has its own checks, which Bathroom Remodel Estimate Template: Catch Missing Lines With AI covers.

Final checks before the scope goes out

• Tie the numbers. Every fixed price, allowance and provisional sum in the scope appears in the quote, and the quote total equals the scope.
• Read it aloud with the customer at the house, room by room, pointing at each thing. Customers tend to notice the missing item when they stand where it should be.
• Search for the loose words in the table above and rewrite each one.
• Check each exclusion against the inclusions for contradictions.
• Confirm every ASK has been answered, and that no assumption the assistant listed is still unconfirmed.
• Put a version number and date on the first page, and send the scope with the quote so both are accepted together.
• Have the commercial terms around the scope, such as payment, cancellation and warranty, read once by a lawyer who practises where you work. The scope is your protection, and the terms decide how far it goes.

Do all of that and the document will be longer than a one-line "bathroom renovation, $18,400". It will also be the document you are grateful for in week three, when the tile arrives, the floor has surprises and the customer remembers a conversation that did not happen.

Questions fitters ask when writing a bathroom scope

What is the difference between a provisional sum and an allowance?

Usage varies by trade and place. In general, a provisional sum covers work or a cost that cannot be defined yet, such as repairs found behind a wall, while an allowance covers a product the customer is still choosing, such as tile. Whatever you call it, define what it covers, how the final amount is measured and who pays the difference.

Should the customer sign the scope separately from the quote?

Attach the scope to the quote and have both accepted together, so there is one document trail. Give the scope a version number and a date, and re-issue it whenever something changes. A scope that lives in an email thread tends to be remembered differently by each side.

What if the customer wants to supply everything themselves?

You can still fit it, but write the lines as fitting only and add a supply schedule: arrival dates, who checks each item and what happens if it is late or wrong. State that faults in the item itself are between the customer and the seller, and that extra visits caused by late or wrong items are chargeable.

Can I ask AI to write the whole scope from site photos?

Not safely. A photo shows a surface, not what is behind it, and the assistant will invent sizes and specifications to fill the gaps. Give it site notes with measurements and ask it to write ASK wherever information is missing. Photos help you take better notes; they do not replace them.

Further reads

• AV Scope of Work: Draft It From Discovery Notes With AI — Another scope drafted from discovery notes, in a different trade.
• AI Construction Design Software: What Renovation Contractors Can Draw — A renovation contractor's guide to AI design software: scan-to-plan, layout options and mock-ups compared, with the points where a professional must take over.
• AI Tool for Construction Planning: Pre-Start Checklist and Long-Lead Items — A 42-item pre-start checklist for small construction jobs, with prompts for scope, long-lead order-by dates and a risk register you actually review.
• Bathroom Fitter Marketing: Before-and-After Posts From Job Photos With AI — A bathroom fitter's routine for matched photos, customer permission, AI-written captions, Google Business Profile updates and a one-month posting calendar.
• AI Tools and AI Development: The Complete 2026 Guide — the AI hub, including every tutorial in the AI-for-business series.

Sources: illustrative specifications, quantities and amounts built for the examples. The clause wording is a starting point for a lawyer to review, not legal advice.