Automate Your Quoting with AI: From Job Photo to Professional Quote in 5 Minutes

ChatGPT

Claude

ServiceM8

Tradify

Why AI quoting is worth your attention

A site visit takes 20 minutes. Writing the quote afterwards takes another 45. AI removes the second step.

Most UK tradespeople I speak to lose three or four evenings a week to quoting. You finish on the tools, eat, then sit down at a laptop until ten at night turning notes into a Word document. The job ate your day. The quote eats your evening. Then the next morning you wonder why you're tired.

The maths is straightforward. If you write three to five quotes a week and each takes 30 to 45 minutes, you are spending two to three hours weekly on a task you do not get paid for. Convert that to a typical UK trades day rate and you are losing £60 to £100 every week. Spread across a year, that is real money and real lost evenings.

AI changes the shape of the task. You still do the site visit. You still read and sign off the quote. But the bit in the middle, the bit that wastes the evening, gets compressed from 45 minutes to five. The technology is finally good enough to do this reliably in 2026 because models like Claude 4.x and GPT-5 can read images, hold long context windows, and follow detailed instructions without losing the thread.

If you have not yet started experimenting with AI in your business, the complete guide to AI tools for UK tradespeople is a better starting point than this article. Come back here once you have an account set up.

What you'll need

This workflow runs on a phone, but a laptop or tablet is easier the first few times you set it up. Nothing here costs more than £20 a month.

Skill level: beginner. If you can attach a photo to a text message, you can do this. If you have never used Claude or ChatGPT, expect the first quote to take 15 minutes while you find your feet. By the third one it is under five.

Step 1: Build your price list document

A simple price list table is the single most important thing in this workflow. Without it, AI guesses. With it, the quote is yours.

This is the step most people skip and then wonder why their AI quotes are full of made up numbers. The AI does not know what your local plasterboard costs or what you charge for a Vaillant 825 swap. You have to tell it.

You do not need anything fancy. A simple table with three columns is enough: item name, your typical rate, and a one line description. Build it in Excel, Google Sheets, or even a Word document. Aim for the 50 to 100 items you actually quote most. Everything else can be added as you go.

Here is what a usable plumbing price list looks like:

Five rows is plenty to start with. The point is to have something the AI can refer to. Once your list has 30 to 50 items it covers most of what you quote. Save it as a PDF or keep it as a spreadsheet, both upload fine.

Step 2: Capture the site visit (photos and voice notes)

More photos and shorter voice notes beats one long voice note every time. The AI reads what it can see.

The quote is only as good as what you capture. Most people on a site visit jot two lines in a notebook, take one photo, and then try to remember the rest at the kitchen table that evening. This is why your manual quotes take 45 minutes. Half of it is reconstructing what you saw.

Here is the capture routine I recommend. It adds maybe 90 seconds to the visit and saves you an hour later.

Photos first. Take 8 to 15 photos. Wide shots of the room. Close ups of the boiler badge, the consumer unit, the radiator valves, the existing pipework. If something is awkward or unusual, photograph it. AI vision is good but it cannot guess what is behind a wall.

Then a voice note. Open the voice memo app on your phone and talk for 60 to 90 seconds. Walk through the job in plain English. "Right, we are at 42 Mill Lane. Customer wants a combi boiler swap. The existing is a Worcester Greenstar 28i, ten years old, no faults but she is upgrading. The new location stays the same, airing cupboard. Flue terminates through the kitchen wall, easy access. Customer is asking for a Vaillant ecoTEC plus 832 if we can. Wants a powerflush included. Job is for week of the 15th. Bathroom radiator is corroded at the bottom, replace if budget allows."

That is your brief. Nothing technical, no formatting, no spelling. Just talk. Most phones now transcribe voice notes to text automatically.

Step 3: The five-minute quote prompt

This is where the magic happens. Open Claude or ChatGPT on your phone or laptop. Start a new conversation. Upload your price list, then upload the photos, then paste the voice note transcript and the following prompt.

The prompt below has been refined over dozens of quotes. Copy it exactly. The structure matters more than the exact wording.

You are my quoting assistant. I have attached three things:

1. My price list (PDF/spreadsheet)
2. Photos from a site visit
3. A voice note transcript describing the job

Please draft an itemised quote for the customer using:
- Items and rates from MY price list only. Do not invent prices.
- Photos to confirm what you can see (e.g. "I can see the existing boiler is a Worcester Greenstar 28i").
- The voice note as the brief.

Output format:
- Customer name and job address at the top
- One line summary of the job
- An itemised table: description, quantity, unit price, line total
- A clear labour total and materials total
- A grand total excluding VAT
- A grand total including VAT at 20%
- A short list of inclusions (what is covered)
- A short list of exclusions (what is NOT covered)
- 2-3 assumptions you have made that I should verify

If you cannot price something because it is not on my list, flag it clearly at the bottom under "Items to confirm" and leave the price blank. Do not guess.

Match the voice and tone of a professional UK trades business. No emojis. No marketing fluff. Just clear, helpful, accurate.

Hit send. Wait 60 seconds. A clean itemised quote comes back. The first one will feel uncanny. The fifteenth will feel normal.

If you want the quote to flow into an existing template, you can ask for it in markdown or HTML and paste it straight into Word, Google Docs, ServiceM8, or Tradify. Most field service apps let you import a formatted body of text into a quote draft.

Step 4: Review, edit, and send

Always read the quote line by line before it goes to the customer. AI gets 90 percent right. Your job is the last 10 percent.

The AI is fast. It is also wrong about 5 to 10 percent of the time. So you read every quote before you send it. This is non-negotiable.

Specifically, check three things:

1. Did it use your prices? Cross reference two or three line items against your master price list. If they match, the rest probably do. If a number looks off, the AI guessed and needs correcting.
2. Did it miss anything? The "items to confirm" section at the bottom is usually where this lives. If the AI flagged an unfamiliar component, decide whether to add it manually or ring the customer for clarification.
3. Does the tone sound like you? Read the summary paragraph out loud. If it sounds like a marketing email, ask the AI to "rewrite this in plain UK English, no fluff". One follow-up message fixes it.

Once it reads right, copy the body into your normal quote template, attach your standard terms and conditions, and send. If you use ServiceM8 or Tradify, you can paste the items straight into the line items grid and the totals recalculate. If you are still emailing PDFs, paste into a Word doc and export.

For a more polished customer-facing template, the free ServiceM8 quote template gives you a professional layout that drops straight into your AI workflow.

Which AI tool: Claude vs ChatGPT vs in-app AI

Three approaches. None is perfect. Pick the one that fits how you already work.

You have three real options. Each has trade-offs.

My honest take: most readers should start with ChatGPT Plus and the prompt above. It is the cheapest, easiest, and most flexible option. If you already use ServiceM8, turn on Auto Quote in parallel, it gets better as your job history grows. Claude is a power user choice for people quoting larger or more complex jobs.

If you want a deeper comparison of how ChatGPT specifically handles UK trades quoting, the dedicated ChatGPT for winning quotes guide goes into prompt variations for different trades.

Common mistakes (and how to avoid them)

Five things go wrong when people first try this. All five are fixable.

What tradespeople are saying

This workflow is not theoretical. Trades on Reddit, in industry forums, and on Trustpilot have been experimenting with AI quoting throughout 2026. The honest verdict from people doing it: it works, with caveats.

The pattern across all these is consistent: AI works as a fast first draft, not as a replacement for trade knowledge. Use it that way and it earns its keep. Trust it blindly and you will send a quote that misses an obvious exclusion.

Recommended videos

If you prefer to watch this in action, these six videos cover everything from building your first AI quote tool to using ServiceM8's built-in quoting and uploading images to Claude.

Build Your Own AI Quote Tool in Minutes For Builders + Startups

SiteVoice

AI for Builders and Tradies: ChatGPT Basics to Business Transformation

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Make Money With This Make.com and ChatGPT Quote Bot

Daniel Forero

SparkyAI: AI-Powered Quoting for Electricians

Jeremy Dawes

Quick Quotes and Invoices with ServiceM8

ServiceM8

How to Upload Images in Claude AI (Full Guide 2026)

AI Mastery

Frequently asked questions

My verdict