First-floor extensions in Sutton-in-Ashfield
Our first-floor extensions service in Sutton-in-Ashfield covers everything: measured survey, design, planning or permitted development checks, structural design, building control and the build itself.
Quick reference for homeowners in Sutton-in-Ashfield.
- Postcode districts
- NG17
- County / area
- Nottinghamshire, England
- Price region
- East Midlands
- Guide price
- £24,500–£35,500 (£1,760–£2,550 per m²)
- Approval route
- It may be permitted development if it goes no more than 3 m beyond the original rear wall (counting any single-storey part) and stays 7 m from the rear boundary; otherwise it needs planning permission.
- Nearest towns
- Kirkby-in-Ashfield (1.9 miles), Mansfield (2.6 miles), Pinxton (3.4 miles)
- Distance to Nottingham
- about 12.7 miles
- First visit
- Free, no obligation
About a first-floor extension
A first-floor extension is a new upstairs room built on top of an existing single-storey part of your house, such as a rear kitchen extension, a utility or a side annexe. It adds a bedroom, bathroom or study without enlarging the footprint. Whether it works depends mainly on whether the walls and foundations below can carry the extra load.
We cover Sutton-in-Ashfield (NG17) and the places around it, including Kirkby-in-Ashfield (1.9 miles), Mansfield (2.6 miles) and Pinxton.
What it costs in Sutton-in-Ashfield
Our guide for the East Midlands is £1,760–£2,550 per m² including VAT. On a project with 4 m × 3.5 m of new first-floor space (14 m²), that puts a first-floor extension in Sutton-in-Ashfield at roughly £24,500–£35,500. Kitchens, bathroom fittings and flooring are priced separately so you can compare like with like.
| Spec | Per m² | 4 m × 3.5 m of new first-floor space (14 m²) |
|---|---|---|
| Essential | £1,620–£2,340 per m² | £22,500–£33,000 |
| Standard | £1,760–£2,550 per m² | £24,500–£35,500 |
| Premium | £2,120–£3,060 per m² | £29,500–£43,000 |
Planning and building regulations in Sutton-in-Ashfield
In England, adding a first floor turns a single-storey extension into one of more than one storey. To be permitted development, the extension as a whole must go no more than 3 m beyond the rear wall of the original house and stay at least 7 m from the rear boundary, with matching materials and roof pitch. Over a side extension it always needs planning permission, costing £548 (or £575 for applications made from 8 December 2026).
Approval in England: 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.
Building regulations: Building regulations approval (full plans recommended) from the council or a registered building control approver, with a completion certificate at the end.
Design points for Sutton-in-Ashfield homes
Replacing the flat roof
The existing roof usually comes off and is replaced by a new first-floor structure. The room below is exposed for a short time, so we plan temporary weatherproofing and sequence the work to keep the kitchen or living room usable for as long as possible.
Matching the roofline
A first-floor extension often changes how the back or side of the house looks more than the original single storey did. Matching the main roof pitch and materials, and keeping the ridge below the main ridge, usually gives the best result and is expected for permitted development in England.
How we'd run your project
Start at your house
We come to your home in Sutton-in-Ashfield, measure up, check the ground floor walls and roof structure, and note anything near the boundaries.
Get it approved
Once you're happy with the design we submit it to the council for Sutton-in-Ashfield and deal with any questions from the planning officer.
Detail and price
Construction drawings, engineer's calculations and building control sign-off, then a written fixed price for the build.
Build it
The new structure goes up first, then we open into the house, finish inside and get the completion certificate.
Questions about first-floor extensions in Sutton-in-Ashfield
Do I need planning permission for a first-floor extension in Sutton-in-Ashfield?
Sutton-in-Ashfield is in England, so England planning rules apply. It may be permitted development if it goes no more than 3 m beyond the original rear wall (counting any single-storey part) and stays 7 m from the rear boundary; otherwise it needs planning permission. If in doubt, a lawful development certificate or a planning application gives you certainty before you build.
How much does a first-floor extension cost in Sutton-in-Ashfield?
Our guide for the East Midlands, which covers Sutton-in-Ashfield, is £1,760–£2,550 per m² including VAT. A typical project with 4 m × 3.5 m of new first-floor space (14 m²) comes to about £24,500–£35,500. Design and approval fees are extra, and we fix the build price in writing once the design is agreed.
Who handles building regulations for a project in Sutton-in-Ashfield?
We handle it as part of the project. What's needed in England: building regulations approval (full plans recommended) from the council or a registered building control approver, with a completion certificate at the end. We prepare the drawings and the engineer's calculations, book the inspections and pass you the completion paperwork at the end.
What happens to the room below while the first floor is built?
The old roof is removed, so the room below is exposed for a short period. We fit temporary weather protection, plan the work so the roof comes off only when the new structure is ready, and agree with you which rooms will be out of use and for roughly how long.
Will the first-floor extension match my house?
It should, and in England matching materials and roof pitch is a condition of permitted development. We match brick, tile, mortar colour and window style where we can, and tell you at the design stage if an exact brick match is not available, so you can choose between the closest match and render or cladding.
Nearby
Other towns near Sutton-in-Ashfield:
Other extensions in Sutton-in-Ashfield
- Rear
- Side
- Wraparound
- Part two-storey
- Over a garage
- Semi-detached
- Detached
- Kitchen and bedrooms
- Bedroom and en-suite
All two-storey extension services in Sutton-in-Ashfield · First-floor extensions across Nottinghamshire
Tell us about your house in Sutton-in-Ashfield and we'll call you back to arrange a free, no-obligation visit.