Cost Calculators
Construction cost calculators.
Quick, free ballpark figures for the most common UK building jobs. Use them to plan and sense-check budgets, then send us your drawings when you need a real number.
In short
Our free construction cost calculators give indicative UK price ranges for 7 common jobs, from new build houses and extensions to loft conversions, garages, roofing and plastering.
Every figure is a ballpark shown ex VAT, based on typical rates. For a number you can quote from or build against, you need a proper measured estimate from your drawings.
Pick a calculator
Each tool gives an indicative range and explains what drives the cost.
House Build Cost
Estimate the cost of building a new house from its floor area, build quality and number of storeys.
Open calculatorExtension Cost
Estimate the cost of a single or double storey extension from its footprint and finish level.
Open calculatorLoft Conversion Cost
Estimate the cost of a loft conversion by type, floor area and whether you want an ensuite.
Open calculatorGarage Build Cost
Estimate the cost of building a single or double garage, attached or detached, from its size.
Open calculatorCost Per Square Metre
Look up the build cost per square metre for a project type and quality, with an optional total.
Open calculatorPlastering Cost
Estimate plastering costs from your wall or ceiling area and whether you need a skim or float and set.
Open calculatorRoofing Cost
Estimate a new roof from its plan area, pitch and covering, from concrete tile to natural slate.
Open calculatorNeed more than a ballpark?
Calculators give you a rough guide. Send us your drawings and we'll come back with a professional, measured estimate you can quote from or build against.
Upload Your Drawings