Take Control of Your Build Budget
Before You Break Ground
Building your dream home or major extension? Avoid unexpected budget blowouts with trade-by-trade cost breakdowns, material schedules, and contractor tender reviews.
Breakdown
Mortgage Ready
Turnaround
Advice
Eliminating Self-Build Cost Risks
Fear of Hidden Overruns
Over 70% of self-builds exceed their initial budget. Our itemised cost breakdowns reveal every line item before you commit.
Confusing Builder Quotes
When builder quotes differ by £50k, who is right? Our independent estimate gives you the true benchmark to negotiate from.
Mortgage Stage Payment Approval
Self-build mortgage lenders require structured cost breakdowns before approving drawdown milestones.
What We Price for Self-Builders
Every estimate is prepared trade-by-trade using current UK regional labour, material, and plant rates with full Excel transparency.
- Bespoke New Build Homes
- Two-Storey & Wrap-Around Extensions
- Barn & Heritage Conversions
- Material Take-Off Schedules
- Builder Quote Comparison Reviews
- Self-Build Mortgage Cost Plans
- Subcontractor Work Package Breakdowns
- Drainage & Groundworks Take-Offs
- Internal Finishing & Joinery
- VAT Reclaim (Notice 708) Guidance
NEED YOUR DRAWINGS PRICED?
Send us your project drawings and we'll confirm an exact fixed price before any work begins.
How Our Estimating Process Works
A rigorous, multi-step surveying workflow to ensure maximum accuracy and zero omissions in your cost plan.
Send Your Plans
Upload your drawings, surveys, or tender specifications online.
Scope Review
We review project scope and confirm a transparent fixed quote.
Measure & Take-Off
Accurate quantity take-offs measured directly from your drawings.
Costing
We apply current regional labour, material, plant, and subbie rates.
Quality Check
Senior QS peer review to verify completeness and accuracy.
Deliver
Receive your detailed editable Excel workbook and clean PDF summary.
What Our Clients Say
Trusted by builders, architects, property developers, and homeowners across the UK.
"As a first-time self-builder, Bidders Support was the best investment we made. Their estimate gave us the ammunition to negotiate £24,000 off our builder quotes without sacrificing any design features."