Norwich, Norfolk
Single Storey Extension in Norwich
A single storey rear or side extension is one of the most popular home improvements in the UK, adding valuable living space without the complexity of multi-level construction.
Estimated Cost
£28,000 – £44,000
Based on 20m² at local rates
8–14 weeks typical duration
Planning permission: Usually not required
Cost Breakdown for Single Storey Extension
Estimated costs for a typical 20m² single storey project, adjusted for local labour and material rates.
| Category | Low Estimate | High Estimate |
|---|---|---|
| Foundations & Groundworks | £3,360 | £5,280 |
| Structural Walls | £4,200 | £6,600 |
| Roof Structure & Covering | £2,800 | £4,400 |
| Windows & Doors | £2,240 | £3,520 |
| Plumbing & Drainage | £2,240 | £3,520 |
| Electrical Installation | £1,680 | £2,640 |
| Plastering & Rendering | £1,680 | £2,640 |
| Flooring | £1,400 | £2,200 |
| Kitchen/Bathroom Fitting | £2,800 | £4,400 |
| Decoration & Finishing | £1,400 | £2,200 |
| Professional Fees | £2,800 | £4,400 |
| Contingency (10%) | £1,400 | £2,200 |
| Total Estimated Cost | £28,000 | £44,000 |
* Costs are estimates based on regional averages and may vary depending on specification, access, and site conditions. Prices include VAT at 20%.
Frequently Asked Questions
Get an Accurate Quote for Your Single Storey in Norwich
These are estimated costs based on regional averages. For a personalised, expert-backed quote tailored to your specific project, use our free quote calculator.
Get Your Free QuoteSingle Storey Extension Costs in Nearby Cities
Compare single storey costs in cities near Norwich.