How Marc, a Plumber in Lyon, Saved 8 Hours a Week by Automating Quotes with AI

Marc Durand, an independent plumber based in Lyon with two employees, used to spend an average of ten hours per week drafting quotes. Each job required reopening a Word template, adjusting work items, checking supply prices, and customizing the document for each client. A long, repetitive exercise, usually done in the evening after a full day on site.

Three months after automating this task with an AI solution, he recovered eight hours per week, improved his conversion rate from 52% to 71%, and grew revenue by 18%. Here is how.

The Hidden Cost of Manual Quoting for a Tradesperson

Writing a quote takes time, but its true cost is often underestimated. A quote sent 48 hours after a site visit has three times less chance of being accepted than one sent the same day, according to a Bpifrance Le Lab 2024 analysis of commercial practices among construction tradespeople.

For Marc, the issue was not quote quality, but speed. Between jobs, supply runs, and travel, it often took him two days to send a quote after a visit. Competitors had sometimes already responded the same day.

A McKinsey 2024 survey on productivity in small construction firms confirms that tradespeople who reduce their quoting time to under 4 hours see an average 15 to 25% increase in acceptance rates.

A Solution Set Up in Two Days

Marc uses Obat, a craft management platform, to create and send quotes. He added a connection to an AI assistant via the model's API, allowing him to automatically generate quote content from a voice or text summary of the job.

His current workflow:

1. After a client visit, he records a 2-minute voice note on his phone: nature of the work, required supplies, estimated labor time.
2. The note is automatically transcribed and sent to the AI assistant, which generates a structured quote with work items, quantities, and current unit prices.
3. Marc reviews the quote in 5 minutes, adjusts if needed, and sends it from Obat.

Total time from site visit to quote delivery has dropped from 48 hours to under 2 hours.

What Made the Real Difference: Speed

Marc had not anticipated it, but the speed of delivery had the biggest impact on his results. By sending quotes on the same day as the visit, he now reaches clients before competitors.

His conversion rate went from 52% to 71% in three months. Out of 100 quotes sent, he now signs 71 projects compared to 52 before. With an average basket of 1,200 euros, that represents roughly 228,000 euros in additional annualized revenue from the same prospect base.

Limitations to Know

AI does not replace pricing judgment: it speeds up drafting and formatting. Marc still checks every work item, especially for supplies with fluctuating prices. He also pre-loaded his usual rates into the assistant, which took half a day of initial setup.

A MIT Sloan Management Review 2024 study on AI adoption in small businesses highlights that projects that fail tend to be those that delegate the decision entirely to the tool without keeping a human validation step. For Marc, the 5-minute review is non-negotiable.

Why This Kind of Project Benefits from Expert Guidance

Marc tried to set up this system on his own before calling in a consultant for the API connection and initial configuration. On his own, he had lost two weeks on compatibility issues between his software and the model's API. With targeted support, everything was operational in two days.

This is the purpose of the IMPACT methodology, specifically the Diagnostic-Assessment phase that precedes any implementation. For a tradesperson like Marc, the TransformAudit at 1,490 euros identifies exactly where AI can save time in your business, without heading in the wrong direction.

If you are a tradesperson and quote writing is taking too much of your time, contact us for a 30-minute conversation about your situation.