Got 5 minutes? Price a rear extension & loft conversion right now.

You get a phone call from a potential client. They want a price for a 30m² rear extension with a kitchen fit-out and a loft conversion.

They don’t have final architectural plans yet, just a vision, a rough budget, and a question: “Roughly, what’s that going to cost me?”

This is the ultimate SME dilemma.

1. Option A: You spend 3 hours building a quote from scratch on a spreadsheet, guessing quantities, and checking merchant prices, only for them to change their mind on the scope next week.

2. Option B: You give them a “rough gut-feeling price,” miss critical site preliminaries, and end up under-quoting by £15,000 when the job actually starts.

At ProBuilder, we don’t think you should have to choose between wasting your evenings or losing your profit.

That’s why we’ve officially launched the ProBuilder Build Configurator, a guided, AI-powered estimating wizard that turns high-level choices into a Chartered-QS-grade estimate in under 5 minutes. And it’s 100% free.

Instead of typing line items one by one into a blank sheet, the Build Configurator walks you (or your client) through a 4-step stepper.

1. Pick the Property & Scope: Select from detached, semi, terraced, or flats, and stack your project types (e.g., Rear Extension + Kitchen Refurb + Loft Dormer across 50+ supported project types).

2. Set the Scale & Scope: Use intuitive presets (Small 12m² to XL 45m²) or set exact dimensions. Choose the spec level from Cosmetic up to High-Spec Remodel.

3. Factor in the Site Realities: Is the house occupied? Is access tight? Is it in a conservation area? Are there party wall notices required?

4. Hit “Create Estimate”: Our Chartered-QS-style AI decomposition engine explodes those high-level choices into 50 to 150+ itemised line items—split by labour, materials, and plant.

The AI automatically searches live UK merchant pricing, factor in scaffold disturbance, applies site preliminaries, and adjusts for your specific area.

Try ProBuilder Estimator

With the addition of the Build Configurator, ProBuilder Estimator now gives you the complete toolkit for any stage of a job:

• Got full architectural PDFs? Run it through ProBuild Takeoff. The AI reads the plan, pins the items, measures the quantities, and with your help pushes it straight to the Estimator.

• Just talking through concepts or early-stage quotes? Fire up the Build Configurator. Walk through the choices in Quick Mode (60 seconds) or Detailed Mode (5 minutes) and generate a full Bill of Quantities before the client even finishes their cup of tea.

When you hit “Generate,” you don’t just get a headline number. You get a complete, professional commercial pack:

• Itemised Bill of Quantities (BoQ) with labour, material, and plant breakdowns.

• A Materials Order List ready for your merchant.

• A Mini-Gantt Programme showing project phasing.

• A Subcontractor RFQ Pack to send straight to your trades.

• A Shareable Link so your client can review the scope online.

Whether you’re a one-man band looking to quote faster on site, or a growing firm trying to standardise pricing across your team so everyone quotes the exact same way, the Build Configurator is ready for you today.

No blank pages. No missed items. No wasted Saturdays.

Try the Build Configurator for Free →