Extension Cost Per Square Metre 2026: What to Expect in Poole
Cost per square metre is the standard way to compare extension quotes. But the figure varies dramatically depending on specification, region, complexity, and what is included. Here is what Poole homeowners should expect to pay.
Local cost range — Poole
£1,800–£2,800/m²
What affects costs in Poole
Poole rates vary significantly by neighbourhood. Sandbanks and Canford Cliffs command premium rates (£2,500–£3,500/m²). Hamworthy and Parkstone are closer to the Dorset average.
Cost estimator
Rates for Poole
6m × 4m = 24m²
Estimated cost in Poole
Excl. VAT (£10373 – £16376)
Local insight: Poole's mix of Sandbanks premium properties and Parkstone family homes means costs vary significantly. Waterfront properties command premium build rates due to access constraints and material specifications.
Cost breakdown
2026 rates by specification
Basic specification (standard bricks, flat roof, basic windows): £1,500–£2,000/m². Standard specification (quality bricks, bi-fold doors, underfloor heating): £2,000–£2,800/m². Premium specification (bespoke materials, structural glazing, high-end finishes): £2,800–£3,500/m². These are Dorset rates.
What affects the rate
Foundation depth (clay soil or trees nearby = deeper = more expensive), access difficulty (narrow lanes or terraced properties), specification level, bathroom inclusion (wet rooms cost more per m²), and the builder's current availability. A busy builder quotes higher.
| Region | Standard | High Spec |
|---|---|---|
| Dorset | £1,800–£2,200 | £2,500–£3,200 |
| London | £2,500–£3,500 | £3,500–£5,000 |
| South East | £2,000–£2,800 | £2,800–£3,800 |
| Midlands | £1,600–£2,200 | £2,200–£3,000 |
| North | £1,400–£2,000 | £2,000–£2,800 |
National guide figures. Local rates in Poole: £1,800–£2,800/m².
Frequently asked questions
National guide
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