Compare external wall insulation costs by property type →
What affects the cost?
External wall insulation pricing depends on wall area, insulation material, render or cladding finish, scaffolding, pipework alterations and property access.
- External wall area
- EPS, mineral wool or board system
- Render or cladding finish
- Scaffolding
- Gutter and pipework changes
- Existing wall condition
Typical cost breakdown
Regional planning examples
The examples below apply our published modelling factor to the same national benchmark. They are not claimed as observed city-wide average quotes.
External wall insulation costs by location
Open a detailed city page to see the same national benchmark adjusted through the transparent regional model, with local planning considerations and worked examples.
Sources used for this guide
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 per m²?
Current UK installed costs are around £150–£200 per m², with an average planning point near £175 per m².
What does a semi-detached house cost to externally insulate?
A current UK planning range is around £14,000–£20,000.
Related costs
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UK house rendering prices per square metre, by render type and property size.
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