Rochdale, Greater Manchester
Double Storey Extension in Rochdale
A double storey extension adds significant space on two levels, making it cost-effective per square metre compared to two separate single storey extensions.
Estimated Cost
£39,840 – £63,080
Based on 40m² at local rates
12–20 weeks typical duration
Planning permission: Usually required
Cost Breakdown for Double Storey Extension
Estimated costs for a typical 40m² double storey project, adjusted for local labour and material rates.
| Category | Low Estimate | High Estimate |
|---|---|---|
| Foundations & Groundworks | £4,781 | £7,570 |
| Structural Walls | £5,976 | £9,462 |
| Roof Structure & Covering | £3,984 | £6,308 |
| Windows & Doors | £3,187 | £5,046 |
| Plumbing & Drainage | £3,187 | £5,046 |
| Electrical Installation | £2,390 | £3,785 |
| Plastering & Rendering | £2,390 | £3,785 |
| Flooring | £1,992 | £3,154 |
| Kitchen/Bathroom Fitting | £3,984 | £6,308 |
| Decoration & Finishing | £1,992 | £3,154 |
| Professional Fees | £3,984 | £6,308 |
| Contingency (10%) | £1,992 | £3,154 |
| Total Estimated Cost | £39,840 | £63,080 |
* 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 Double Storey in Rochdale
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 QuoteDouble Storey Extension Costs in Nearby Cities
Compare double storey costs in cities near Rochdale.