Independent UK cost data
Know what your home project should cost.
Practical UK home improvement cost guides and calculators, with regional pricing for renovation, building, energy upgrades and trades.
✓ Regional estimates✓ Clear cost breakdowns✓ Regularly updated
Example · 30 m² extension · North West
Single-storey extension
£60,750 typical estimate
Estimated range£54,675–£68,040
Suggested contingency£6,075
Budget to plan for£66,825
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Extension cost
Estimate materials, labour, regional pricing and contingency.
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House renovation
Estimate materials, labour, regional pricing and contingency.
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Loft conversion
Estimate materials, labour, regional pricing and contingency.
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Kitchen renovation
Estimate materials, labour, regional pricing and contingency.
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Cost library
Browse costs by project
From major renovation to individual trades, each guide uses the same underlying pricing model.
ExtensionsPlan single and double-storey extensions
£1,800–£3,000 / m²
Loft conversionsDormer, Velux and hip-to-gable projects
£27,500–£75,000+
KitchensUnits, worktops, appliances and fitting
£5,250–£28,400
BathroomsSuites, tiling, plumbing and labour
£5,500–£8,000 typical
RoofingRepairs, replacement and flat roofs
£4,000–£18,000
Windows & doorsDouble glazing and replacement doors
£450–£1,500 / unit
Heating & energyBoilers, heat pumps and insulation
£2,000–£50,000+
Solar & batteriesPanels, inverters and home batteries
£5,000–£14,000
ElectricalRewires, consumer units and EV charging
£500–£12,000
PlumbingRates, pipework and bathroom plumbing
£45–£90 / hour
DecoratingPainting, plastering and flooring
£150–£350 / day
OutdoorDriveways, patios and garden rooms
£2,000–£30,000+
Regional pricing
Costs vary across the UK
Our calculator architecture supports regional coefficients instead of pretending one national average fits every postcode.
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