📊 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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