Nov '25 • General discussion
📊 Average Extension Cost per Square Metre by Region (2025)
(FREE DOWNLOADABLE CALCULATOR ATTACHED)
Cost per m²
London £3,000 – £3,200 Highest due to labour & material costs
Essex & South East £2,700 – £2,900 Premium outer-London pricing
South West (e.g. Devon, Cornwall) £2,400 – £2,700 Varies with rural vs. urban areas
West Midlands (e.g. Birmingham) £2,200 – £2,500 Competitive pricing, especially outside city
East Midlands (e.g. Nottingham, Leicester) £2,200 – £2,400 Affordable with good access to materials
North West (e.g. Manchester, Liverpool) £2,000 – £2,300 Lower overall due to demand & labour costs
North East (e.g. Newcastle) £1,800 – £2,200 Among the lowest nationally
Wales£1,900 – £2,300 Lower labour & site costs in rural areas
Scotland£2,000 – £2,400Similar to Midlands, varies with remoteness
Northern Ireland£1,800 – £2,200 Great value, but materials may cost more in remote areas
🧮 Quick Pricing Tip:
To price an extension fast:
Extension size (m²) × your region’s rate
Example:A 30m² extension in Essex at £2,800/m² = £84,000 (estimated)
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📊 Average Extension Cost per Square Metre by Region (2025)
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