Free planning tools
Measure first. Ask better questions.
Practical calculators and checkers for Surrey groundworks, extensions, drainage, paving and site surveys.
Use a calculator or checker to organise the first questions, then let a site survey replace the assumptions.
Groundworks Cost Calculator
Build an early planning range for excavation, foundations, drainage and concrete. This is a scope-shaping tool, not a quotation.
Open tool Free toolExcavation & Muck-Away Calculator
Estimate in-ground volume, bulked spoil and an indicative number of collections from simple site dimensions.
Open tool Free toolExtension Cost Estimator
Explore an early extension budget by floor area, storeys, finish level, access and structural complexity.
Open tool Free toolPatio & Driveway Materials Calculator
Estimate surface area, excavation, sub-base and paving quantities before you request a site-specific quotation.
Open tool Free toolDrainage Problem Checker
Turn symptoms into a clearer first brief and identify whether inspection, maintenance, levels or new drainage may be the next step.
Open tool Free toolConstruction Project Planner
Create a practical starting checklist for an extension, groundworks, driveway, drainage or structural project.
Open tool Free toolSite Survey Brief Builder
Build a concise project brief with the photos, measurements, constraints and approvals a contractor needs to price accurately.
Open toolFree printable resource
Make the first site survey count.
Use the A Jones project-readiness checklist to gather photos, dimensions, access details, site constraints and approval questions before the first visit.
The next useful step
A calculator cannot see your site.
Use the result to prepare, then share photos, access details and drawings so the site survey can replace assumptions.