Home extensions in Retford
Planning an extension in Retford? Compare extension types, see guide prices adjusted for Retford and book a free site visit.
- Postcode districtsDN22
- Price regionEast Midlands (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation

What works best for Retford houses?
The East Midlands has plenty of inter-war and post-war semis and detached houses with room to extend, alongside Victorian terraces in the towns.
Depending on the plot, double-storey extensions and conservatory replacement extensions are often the strongest options, with single-storey rear extensions worth considering where there is room.
Retford extension prices at a glance
Use these Retford guide prices to sense-check a budget; the guide-price tool narrows them to your own size, and the site visit turns them into a written figure.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Orangery extensions | 16 m² | £42,500 – £53,500 |
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
| Wraparound extensions | 25 m² | £54,500 – £69,000 |
Approvals for an extension in Retford
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
In England a single-storey side extension can be permitted development if it is no more than 4 m high and no wider than half the width of the original house. Two-storey side extensions, and any side extension on designated land such as a conservation area, need a householder planning application.
In a conservation area, national park, National Landscape, the Broads or a World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
Building regulations approval is separate from planning. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.
Applications are decided by the local planning authority (your district, borough or unitary council).
Covering Retford and nearby
We cover Retford and the postcode districts DN22. We also work in nearby Worksop (8 miles), Mansfield Woodhouse (15 miles), Mansfield (17 miles), Newark-on-Trent (18 miles), Sutton-in-Ashfield (19 miles). For homes towards Lincolnshire, Gainsborough is around 8 miles away.
Every extension type in Retford
- Double-storey extensions · from £36,000
- Bungalow extensions · from £24,500
- Conservatory replacement extensions · from £19,000
- Side return extensions · from £17,000
- Side extensions · from £20,500
- Flat roof extensions · from £19,500
- Wraparound extensions · from £34,000
- Kitchen extensions · from £25,500
- Pitched roof extensions · from £21,000
- Single-storey rear extensions · from £19,500
- Orangery extensions · from £28,500
- Building regulations for extensions · from £850
- Utility and boot room extensions · from £13,000
- Home office extensions · from £15,000
- Annexe extensions · from £52,000
- Planning permission for extensions · from £300
- Bedroom extensions · from £24,500
- Timber frame extensions · from £19,500
- Extensions over a garage · from £22,500
- Extension plans and drawings · from £1,100
- Porch extensions · from £3,800
- Glass box extensions · from £28,500
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Questions about extensions in Retford
How much does an extension cost in Retford?
Using our East Midlands factor (×0.95), a standard-spec single-storey extension of 20 m² is a guide £38,500 to £49,500 including VAT, and a 32 m² two-storey extension £54,500 to £71,500. Your written price follows the survey.
Do you cover all of Retford?
Yes, including the surrounding parts of Nottinghamshire. Site visits are free and there is no obligation.
Who do I contract with?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
Will my neighbours need to be told?
If you apply for planning or prior approval the council notifies them, and in England party wall notices may be needed for work near a shared boundary.
Book a free site visit in Retford
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.