Local costs · East of England · September 2026
How much does an extension cost in Peterborough?
A mid-range 25 m² single-storey extension in Peterborough costs about £68,000 to £83,500 including VAT, or £2,700 to £3,300 per m² at East of England prices. Peterborough’s own published charge for building control on a 10 to 40 m² extension is £666 (full plans, including VAT): the 11th cheapest of the 91 councils we checked, 21% below the typical council (£840). The council’s published fee list is older or has no date, so check the current fee with the council before you budget. With a measured survey, building regulations drawings, a structural engineer, Peterborough’s own building control charge and a 15% contingency, plan for £82,500 to £104,000.
Work out your project in Peterborough
Loading the calculator…
Typical prices in Peterborough
| Project | Building work | Budget to plan for |
|---|---|---|
| Single-storey extension, 25 m² | £68,000 to £83,500 | £82,500 to £104,000 |
| Double-storey extension, 40 m² | £97,500 to £123,000 | £117,000 to £152,000 |
| Dormer loft conversion, 30 m² | £50,500 to £62,000 | £61,500 to £79,500 |
| Kitchen, medium | £9,300 to £16,600 | £10,700 to £19,000 |
| Bathroom refit | £6,300 to £9,400 | £7,200 to £10,800 |
Building prices in the East of England run about 7% above the UK average outside London. Kitchens and bathrooms vary less from place to place than extensions and lofts.
Building control fees in Peterborough
| Work | Charge |
|---|---|
| Extension up to 10 m² (full plans) | £540 |
| Extension 10 to 40 m² (full plans) | £666 |
| Larger extension, 40 to 100 m² (full plans) | £798 |
| Extension 10 to 40 m² (building notice) | £708 |
| Loft conversion up to 40 m² | £672 |
| Garage conversion | £330 |
Peterborough’s own published charge for building control on a 10 to 40 m² extension is £666 (full plans, including VAT): the 11th cheapest of the 91 councils we checked, 21% below the typical council (£840). The council’s published fee list is older or has no date, so check the current fee with the council before you budget. Source: Peterborough’s building control charges. Schedule date: 6 May 2019 (as stated on page). The charges include VAT.
Check before relying on it: the schedule is older than 2025 or undated, so check it is still current.
Private building control firms (registered building control approvers) set their own prices and are often competitive, so it is worth asking one or two for a quote as well. See how Peterborough compares with every council we checked.
Notes on Peterborough’s schedule
Peterborough publishes one full plans charge on its own page. The loft figure is for a loft with a dormer; without one it is £552.
Planning
If your extension needs planning permission, a householder application in England costs £548. Many single-storey rear extensions are permitted development and need no application, and a lawful development certificate (£274) confirms it in writing.
Other councils in the East of England
Building control for a 10 to 40 m² extension:
- Uttlesford: £786
- Bedford: £915.79
- North Norfolk: £919.20
- Colchester: £925
- Maldon: £946.80
- Watford: £1,065
- St Albans: £1,065
Questions people ask
How much does an extension cost in Peterborough?
A mid-range 25 m² single-storey extension in Peterborough costs about £68,000 to £83,500 including VAT for the building work, or £2,700 to £3,300 per m², based on East of England prices reviewed in September 2026. With a measured survey, design, a structural engineer, Peterborough’s own building control charge and a 15% contingency, plan for £82,500 to £104,000.
How much is building control in Peterborough?
Peterborough’s own published charge for full plans approval of a 10 to 40 m² extension is £666 (including VAT). Schedule date: 6 May 2019 (as stated on page).
How much does a loft conversion cost in Peterborough?
A mid-range 30 m² dormer loft conversion in Peterborough costs about £50,500 to £62,000 including VAT for the building work, and about £61,500 to £79,500 with fees, Peterborough’s own building control charge and a 15% contingency.
Before you get quotes
- How to compare builders’ quotes line by line
- Plan your whole budget, including the costs people forget
- When quotes arrive, check each one against the typical range for your area
Work in Peterborough? Firm listings on Estiquote’s map of checked local firms open soon: see what you’ll need. Listing will be free while we build the map, with at least 30 days’ notice before any charge.