Two-storey extensions in North Yorkshire
Find your town in North Yorkshire, compare extension types and get a guide price in a couple of minutes.
North Yorkshire at a glance
- Nation
- England
- Price region
- Yorkshire and the Humber
- Postcode areas
- BD, DL, HG, TS, YO
- Main town
- York
- Towns listed
- 16
- Site visits
- Free, no obligation
Choose your town
- York
- Middlesbrough
- Harrogate
- Scarborough
- Redcar
- Selby
- Guisborough
- Northallerton
- Ripon
- Knaresborough
- Skipton
- Ingleby Greenhow
- Whitby
- Haxby
- Catterick Garrison
- Thirsk
Guide prices in Yorkshire and the Humber
| Extension type | Per m² | Typical project |
|---|---|---|
| Two-storey rear extension | £1,840–£2,480 per m² | £51,500–£69,500 |
| Two-storey side extension | £1,890–£2,530 per m² | £79,000–£106,500 |
| Two-storey wraparound extension | £1,980–£2,710 per m² | £111,000–£152,000 |
| Part single, part two-storey | £1,840–£2,530 per m² | £66,000–£91,000 |
| Extension over a garage | £1,610–£2,350 per m² | £29,000–£42,000 |
| First-floor extension over an existing single storey | £1,660–£2,390 per m² | £23,000–£33,500 |
| Two-storey front extension | £2,020–£2,760 per m² | £24,500–£33,000 |
Including VAT, Standard spec. See all prices and fees.
The main places we list in North Yorkshire are York (YO1), Middlesbrough (TS1), Harrogate (HG1), Scarborough (YO11), Redcar (TS10), Selby (YO8), Guisborough (TS12) and Northallerton (DL6). We cover the villages in between too.
Which type suits your house?
The boundaries usually decide it. Two-storey work close to a neighbour needs careful design for light and privacy, so at the visit in North Yorkshire we measure distances to every boundary before suggesting a type.
The rules in England
North Yorkshire is in England. Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission. Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.
The full England rules explained
Extension types
- Two-storey rear extensions
- Two-storey side extensions
- Two-storey wraparound extensions
- Part single, part two-storey extensions
- Extensions over a garage
- First-floor extensions
- Two-storey front extensions
By house type
- Two-storey extensions for semi-detached houses
- Two-storey extensions for detached houses
- Two-storey extensions for end-of-terrace houses
Rooms and uses
- Kitchen extensions with bedrooms above
- Extra bedroom and en-suite extensions
- Two-storey annexe extensions
- Garage conversions with a room above
Design and approvals
- Two-storey extension plans and drawings
- Planning permission for two-storey extensions
- Structural engineering for two-storey extensions
- Building regulations for two-storey extensions
- Party wall notices for extensions
- Design and build two-storey extensions
Questions about extensions in North Yorkshire
How much does a two-storey extension cost in North Yorkshire?
In Yorkshire and the Humber our guide for a two-storey rear extension is £1,840–£2,480 per m² including VAT, about £51,500–£69,500 for a 4 m × 3.5 m footprint on two floors (28 m² of new floor space). Side and wraparound extensions cost a little more per m².
Do I need planning permission in North Yorkshire?
Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission. Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026).
Do you cover the whole of North Yorkshire?
Yes. We list the main towns here, but we cover the whole of North Yorkshire including villages. The first site visit is free.
What happens at the first visit?
We look at your house, the boundaries, access and drains, talk through what you need and explain the approvals. Then we price the design stage, including the measured survey, in writing.