Calculate your external wall insulation cost
External wall insulation cost per m² in Cambridge
External wall insulation by property type in Cambridge
The UK figures are current property examples; the city column applies the same moderated 18% regional weighting as the live calculator.
UK £5,000–£7,000 · avg £6,000£5,050–£7,100 · avg £6,100
UK £6,000–£10,000 · avg £8,000£6,100–£10,150 · avg £8,100
UK £14,000–£20,000 · avg £17,000£14,200–£20,300 · avg £17,250
UK £15,000–£21,000 · avg £18,000£15,200–£21,300 · avg £18,250
UK £20,000–£30,000 · avg £25,000£20,300–£30,450 · avg £25,350
Current UK system benchmarks
What can change a real Cambridge quote?
- External wall area
- EPS, mineral wool or board system
- Render or cladding finish
- Scaffolding
- Gutter and pipework changes
- Existing wall condition
Local planning considerations
Local labour demand, restricted central access and higher-specification property work can move real quotations outside the broad East of England planning range.
- Central access and delivery constraints can add logistics that are not captured by a simple regional multiplier.
- Check heritage, conservation or listed-building requirements before budgeting standard external alterations or replacement windows.
- Professional fees and specification choices can outweigh the regional factor on extensions, structural work and high-finish refurbishments.
How the regional model works
The live external-wall-insulation calculator uses only 18% of the broad East of England regional difference because insulation boards, fixings and render systems contain a substantial nationally priced material component. The resulting Cambridge EWI factor is 1.014× and is applied to the current £150–£200 per m² installed benchmark.
Sources
External Wall Insulation Cost: 2026 UK Guide
Published / checked: July 2026
Used for: Installed external-wall insulation cost-per-m² and property-type ranges
Frequently asked questions
How much does external wall insulation cost in Cambridge in 2026?
The current UK installed benchmark is £150–£200 per m², averaging about £175 per m². Using the same moderated regional factor as the live calculator gives a Cambridge planning rate of about £152–£203 per m².
How much is external wall insulation for a semi-detached house in Cambridge?
The current UK semi-detached example is £14,000–£20,000, averaging £17,000. Applying the moderated Cambridge model gives about £14,200–£20,300, with a modelled midpoint near £17,250.
Why is the Cambridge EWI adjustment smaller than the broad regional factor?
External wall insulation contains a large material and system component, so the live calculator applies only 18% of the broad regional difference rather than treating the entire installed price as locally variable labour.
What can make external wall insulation more expensive?
Wall repairs, scaffolding, architectural detailing, moving rainwater pipes and services, premium finishes, difficult access and larger exposed wall areas can all increase the final quote.