Portsmouth, Hampshire
Kitchen Extension in Portsmouth
A kitchen extension creates a modern, open-plan living and dining space, typically extending the rear of the property to accommodate a larger kitchen area.
Estimated Cost
£32,085 – £51,750
Based on 18m² at local rates
10–16 weeks typical duration
Planning permission: Usually not required
Cost Breakdown for Kitchen Extension
Estimated costs for a typical 18m² kitchen extension project, adjusted for local labour and material rates.
| Category | Low Estimate | High Estimate |
|---|---|---|
| Foundations & Groundworks | £3,850 | £6,210 |
| Structural Walls | £4,813 | £7,763 |
| Roof Structure & Covering | £3,209 | £5,175 |
| Windows & Doors | £2,567 | £4,140 |
| Plumbing & Drainage | £2,567 | £4,140 |
| Electrical Installation | £1,925 | £3,105 |
| Plastering & Rendering | £1,925 | £3,105 |
| Flooring | £1,604 | £2,588 |
| Kitchen/Bathroom Fitting | £3,209 | £5,175 |
| Decoration & Finishing | £1,604 | £2,588 |
| Professional Fees | £3,209 | £5,175 |
| Contingency (10%) | £1,604 | £2,588 |
| Total Estimated Cost | £32,085 | £51,750 |
* Costs are estimates based on regional averages and may vary depending on specification, access, and site conditions. Prices include VAT at 20%.
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