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ChatGPT can draft the words around an estimate: the scope, what is included and excluded, assumptions, timelines and a plain cover note. It cannot set your numbers. Give each prompt your own facts, leave out customer names and addresses, and read the output against your own figures, schedule and terms before anything is sent. A person owns every price, promise and date.
Key takeaways
- Use AI for wording and structure. Set every price, quantity and date yourself.
- Paste in your own facts and tell the tool to use nothing else and to ask about gaps.
- Leave customer names, addresses, phone numbers and payment details out of every prompt.
- Read each draft against your site notes and your terms before it reaches a customer.
- Save the prompts that work in a shared document so every estimator uses the same structure.
The slow part of an estimate is rarely the number. It is the page of careful words around it: what the work includes, what it leaves out, what you assumed, and what happens if the job turns out different from what you saw. A chat assistant is good at turning your rough notes into that page. It is bad at knowing your costs, your crew's pace or your local rules, and it will fill gaps with confident guesses. Every prompt here tells the tool to use only what you supply and to ask when something is missing. Replace the bracketed text with your own details. For the wider set, see AI prompts for contractors, and read the risks of AI for small businesses before you paste in anything private. Rules on written estimates and home improvement contracts vary by state, so confirm yours. This is general information and not legal advice.
1. Questions to ask before you write the estimate
Use it right after a customer's first message, before the site visit, so the visit answers real questions.
A customer asked for [one-sentence description of the request, no name or address]. I am a [trade] contractor. List the ten questions I should ask on site or by phone before I can write an accurate estimate. Group them by access, existing conditions, materials the customer wants, and timing. Do not guess any answers.
Paste in: the request in your own words, minus personal details. Check before using: delete any question that does not apply to your trade. Add the one you always forget, such as parking or shutoff locations. Remember: the list is a starting point for your own judgment.
2. A site visit checklist for this job type
Make a short, reusable list the estimator can carry, so two estimators check the same things.
Make a one-page site visit checklist for estimating a [job type] job. Include measurements to take, photos to capture, things to look for that change the scope, and questions for the customer. Use plain language and short items. Mark anything that depends on local codes with "confirm locally" and do not state any code requirement.
Paste in: only the job type. Check before using: cross out anything you would never check and add the two items that cost you money last year. Remember: do not rely on the tool to know your local rules. A person confirms them.
3. Site notes into a work description in the customer's words
Your notes read like shorthand. The customer needs sentences they can follow.
Here are my site notes for a [job type] job: [paste notes with no customer details]. Rewrite them as a description of the work in plain language a homeowner can follow, in the order the work will happen. Use only the tasks and materials in my notes. Then list every place the notes were unclear or incomplete, as questions for me.
Check before using: compare each sentence to your notes. If the draft adds a task you did not mention, remove it. Remember: the description becomes part of your agreement, so every verb in it is something you are promising to do.
4. Clear wording for a single line item
Lines like "demo and haul" start arguments. One clear line prevents them.
Rewrite this estimate line so a customer understands exactly what it covers: "[your line item]". The details are: [what is removed, what is hauled away, what stays, where debris goes]. Keep it under 40 words. Do not add anything that is not in the details I gave.
Check before using: read it as the customer and ask what they would expect that you did not mean to include. Remember: keep the amount for the line out of the prompt. You add it after.
5. An assumptions section
An estimate rests on what you saw and what you assumed. Put the assumptions on the page, so a surprise has a paper trail.
Based on these facts about a [job type] job: [list the conditions you saw, such as an accessible crawlspace, existing wiring in good shape, working shutoffs], write a short "Assumptions" section of four to six bullets. Each bullet should begin with "This estimate assumes". Do not add assumptions I did not list.
Check before using: every bullet must be something you actually saw or were told. Remember: if an assumption fails during the job, your change-order process applies, so the assumptions section should point to it.
6. What is included, in a short list
Customers compare estimates by what they include. Make yours easy to compare.
From my scope notes below, make a "Included in this estimate" list of up to ten short bullets. Start each with a verb. Notes: [paste]. Use only items from the notes. Put anything that sounds optional in a separate list called "Questions for the estimator".
Check before using: make sure each bullet matches a cost in your estimate. A bullet for a service you did not price is a free service. Remember: ask a second estimator to read the list once.
7. What is not included, in plain language
The exclusions list is where most disputes are won or lost, and where most estimates are weakest.
Write a short "Not included" list for a [job type] estimate. These items are excluded: [your list, such as permits, repairs to hidden damage, painting after repairs, moving furniture]. For each item, add one plain sentence on why it is excluded and who handles it. Keep the tone neutral. Do not add exclusions I did not list.
Check before using: ask what you usually end up paying for out of pocket on this job type and make sure it is on the list. Remember: exclusions that surprise a customer read like an excuse, so go over the list on the walk-through.
8. Wording for material allowances
When the customer has not chosen the tile or the fixture, an allowance holds a spot for the cost. The wording has to say what happens when the real choice differs.
Write three plain sentences explaining a materials allowance on an estimate. The allowance is [amount] for [item]. If the customer's final selection costs more, the difference is added to the invoice, and if it costs less, the difference is credited. The customer must choose by [date] to keep the schedule. Do not change any terms I gave.
Check before using: make sure the wording matches your actual billing practice. Remember: the allowance figure comes from your supplier quote, not from the tool.
9. A payment schedule explained in plain English
A schedule of deposits and progress payments reads like a legal clause. Customers want to know what they will owe and when.
Rewrite this payment schedule for a homeowner in short sentences: [paste your schedule using placeholders such as deposit amount, progress payment at rough-in, final payment at completion]. Keep every figure and date exactly as I gave it. Add one sentence on how to pay, using only these methods: [your methods].
Check before using: verify each number and each trigger event. Your state may limit deposits or require specific contract language for home improvement work, so confirm yours. Remember: if you add a card surcharge, state it exactly as your policy and local rules allow.
10. A timeline paragraph with honest caveats
A date you cannot keep costs you the next review. A range you can keep builds trust.
Write a short paragraph for an estimate describing the timeline: the work should start in [start window] and take about [duration] of working time, depending on weather, materials delivery and any hidden conditions we find. Do not promise a finish date. Mention that we will text the customer if the schedule changes.
Check before using: compare the window with your real calendar and with the lead time on special-order materials. Remember: only promise the text updates if someone will actually send them.
11. Change order wording after the scope moves
When a customer adds a task halfway through, write it down the same day. The tool can draft the words from your facts.
Write a one-paragraph change order for a [job type] job. Original scope: [short summary]. New work requested: [description]. It adds about [time] to the schedule. The amount will be written in by me: [leave blank]. Include a line saying work on the change begins after the customer signs. Plain language, no legal terms.
Check before using: insert the amount yourself and read the paragraph against your original agreement. Remember: if your state requires specific language for changes to home improvement contracts, use that language over the draft.
12. A cover note that goes out with the estimate
A short note from a named person reads better than a bare PDF. The tool can draft it, but you must make it sound like you.
Write a short email to send with an estimate for [job type]. Open by thanking the customer for the site visit on [day]. State in one sentence what the estimate covers, give the expiry date [date], and invite questions by phone at [phone number]. Under 100 words, plain tone, no sales language, no urgency.
Check before using: change anything that does not sound like you. The note goes out under your name. Remember: keep it about the estimate. Our estimate email templates have ready-made versions if you prefer a fixed script.
13. A gap review of your own draft
Use the tool as a second reader after you finish, not as the first writer.
Here is my draft estimate text with the amounts replaced by the word AMOUNT: [paste]. Read it as a skeptical customer and as a skeptical contractor. List anything vague, anything that could be read two ways, and any common item for a [job type] job that does not appear anywhere. Do not rewrite it. Do not check any arithmetic.
Check before using: treat each flag as a question to answer, and ignore the ones that do not apply. Add up the numbers yourself or in your estimating software. A chat tool can make arithmetic mistakes, which is why this prompt tells it to stay away from the figures.
Before any of these drafts leave your office
Read the final text against your notes, your pricing sheet and your terms. Never present AI output as a customer's own words, and never use a prompt to write reviews or testimonials. Check that no customer name, address or phone number went into the prompt. Different tools treat pasted text differently, so look at the privacy and data settings of the one you use. If you want estimates, job notes and approvals to live in one place, our custom CRM service keeps the scope, photos and signed changes with the job record.
Where to start
Start with these three, in order:
- Prompt 7, the not-included list. It fixes the part of your estimate that causes the most disputes.
- Prompt 5, the assumptions section. It gives you something to point to when conditions change.
- Prompt 13, the gap review. It catches what you missed, without touching your numbers.
Run each one on a finished estimate from last month before you use it on a live one, and keep the version that produced a draft you would have been happy to send.
Frequently asked questions
Can ChatGPT calculate my estimate?
It can help with wording, but it can make arithmetic mistakes and knows nothing about your costs. Set prices and quantities yourself, in your own estimating tool or spreadsheet.
Is it safe to paste a customer's address into a prompt?
Leave names, addresses, phone numbers and payment details out. The prompts here work with a job type and your notes alone.
Will an AI-written scope hold up if there is a dispute?
The scope is what you and the customer agreed to, so it is only as good as your review. Read it line by line, and have a lawyer in your state review your standard terms.
Do I have to tell customers I used AI to draft my estimate?
Ask a lawyer in your state if you want a firm answer. The habit that holds up either way is that a person reads, edits and stands behind every word that is sent.
General information for service-business owners, not legal, tax or financial advice. Rules vary by state; check with a qualified professional for your situation.