Proper building work pricing.

For homeowners

Check the likely cost of an extension, loft, renovation, kitchen or bathroom before requesting quotes.

• See the likely budget range before all details are fixed.
• Compare scope choices before the design goes too far.
• Understand the assumptions, exclusions and decisions still to confirm.
• Move into a clearer itemised costing once architectural drawings are ready.

For builders

Create and share structured Guide Prices before preparing a measured quote.

• Create a guide price with range, scope, assumptions and exclusions.
• Share a clean guide link with the client.
• Use client responses and requested extras to decide the next step.
• Turn reviewed drawing measurements into itemised work packages and a detailed price.

For architects

Use free Guide Prices for concept-stage cost planning before a project is ready for a QS cost plan.

• Explore early extension and refurbishment cost ranges.
• Compare changes to area, scope and finish on a consistent basis.
• Keep assumptions, exclusions and unresolved decisions visible.
• Move to a drawing-based Detailed Estimate when the design is ready.

Detailed estimates from architectural drawings

Upload PDF drawings, review extracted dimensions and quantities, then accept them into the costing.

Reviewed measurements become work packages with site costs, allowances, risk, overheads and profit. Incomplete items remain visible as PC sums, provisional sums, exclusions or items to confirm.

Across the UK

Postcode area helps Proper Job reflect regional pricing context across England, Wales, Scotland and Northern Ireland. Local planning and building approval requirements still need to be confirmed for each job.

Why we built it

A small tech team at Grassroots, Oxford Innovation at Keble College builds Proper Job with an experienced carpenter, builder and project manager.

Decades of hands-on experience help the pricing logic go beyond generic square-metre rates to reflect real job context, knock-on work and early unknowns.

Detailed Estimate carries that approach into a measured, reviewable breakdown while preserving the source of each accepted drawing quantity.