How a Building Contractor Can Generate Quotes in 10 Minutes with ChatGPT
A building contractor spends an average of 6 hours per week writing quotes. Here's the ChatGPT workflow a mason in Gironde uses to go from 8 to 18 quotes per week, with ready-to-copy prompts.
A building contractor loses an average of 6 hours per week writing quotes — some of which will never be signed. Yet a professional, fast quote increases signing rates by 23% according to Capeb (2025). The solution isn't to write fewer quotes — it's to write more in less time.
Marc's Story: Mason in Gironde
Marc works alone and manages his order book from his phone. In 2025, he turned down prospects because he didn't have time to write proper quotes. Maximum 8 responses per week. In January 2026, he set up a ChatGPT workflow in 2 hours. Now: quote time from 45 min to 10-12 min, quotes produced per week from 8 to 18, signing rate from 34% to 41%, and Q1 revenue up 28%.
The 3-Step Workflow
Tailored advice
Leading an AI transformation in your SMB or mid-sized company? Identify your top 3 priorities in 30 minutes.
Book my free diagnostic →Step 1 — Create your custom GPT (1 hour): In ChatGPT Plus (€20/month), create a custom GPT named "BTP Quote Assistant." In the system instructions, paste your business details: SIRET, insurance policy number, rate grid, payment terms, header format.
Step 2 — Create your intake grid (30 min): Prepare a phone note with 12 questions: client name, site address, work type, approximate surface/linear, specified materials, access constraints, asbestos/lead presence, desired timeline, context (new/renovation/emergency), client email, special points, site photo.
Step 3 — Generate the quote (10 min): Open ChatGPT on your phone, select your "BTP Quote Assistant" GPT. Paste your intake answers. Add: "Generate the complete quote in PDF-ready format." ChatGPT produces a structured quote in under 30 seconds.
Ready-to-Copy Prompt (Facade Render)
"Project: facade render on individual house, 120m² surface, 2 facades with 1 internal corner. Material: standard single-coat render in off-white. Access: no existing scaffolding. Client: Mr. Smith, 15 Pine Street, Mérignac. Timeline: within 6 weeks. Generate the complete quote."
Business Impact
Marc now sends quotes from his phone right after site visits, sometimes in the car before driving away. According to Qualibat (2024), a quote sent within 24h has 35% higher signing probability than one sent after 72h.
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