How Marc, a Plumber in Lyon, Saved 8 Hours a Week by Automating Quotes with AI
Marc Durand, an independent plumber in Lyon, cut quote preparation time by 80% using AI. His conversion rate jumped from 52% to 71% in three months.
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:
- After a client visit, he records a 2-minute voice note on his phone: nature of the work, required supplies, estimated labor time.
- The note is automatically transcribed and sent to the AI assistant, which generates a structured quote with work items, quantities, and current unit prices.
- 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.
That is the whole point of the diagnostic and scoping phase that precedes any implementation.
If you are a tradesperson and quote writing is taking too much of your time, feel free to get in touch.
Frequently asked questions
Which quoting software works best with AI for a plumber?
Several craft management tools now include AI assistants, such as Sellsy, Batappli, or Obat. You can also connect a language model to your existing software via an API or an automation tool like Make or Zapier, without switching platforms.
Do you need technical skills to set up this system?
No. Marc deployed his system with a consultant's help in two days. Most configuration is done through visual interfaces. The most technical part, the API connection, can be handled by any integrator familiar with no-code tools.
Can AI generate quotes that comply with building regulations?
AI generates the structure and content of the quote, but verifying unit prices and compliance with standards remains your responsibility. In practice, Marc spends 5 minutes reviewing each generated quote, compared to 45 minutes of manual drafting before.
What is the estimated return on investment?
Marc saves around 8 hours per week, which he reinvests in new projects. His conversion rate went from 52% to 71% in three months because his quotes arrive faster than those of competitors. Over a year, he estimates the financial gain at more than 15,000 euros in additional revenue.
Does this approach work for an electrician or painter?
Yes. The logic is identical for any tradesperson who drafts repetitive quotes. Work items, supplies, and labor break down the same way. Several tradespeople in the Nachnouchi network have replicated this approach across different trades.