Double Storey Rear Extension Carlton
A double storey rear extension adds two full floors to the back of your Carlton home – usually a larger kitchen-diner downstairs and an extra bedroom or bathroom upstairs. It is one of the most cost-effective ways to gain serious space without moving.
We design, gain planning approval and build the whole project for homeowners across Carlton, Gedling and the surrounding NG4 area, with one team managing everything from survey to sign-off.
- Full design and planning service for Carlton properties
- Fixed written quotations – no vague day rates
- Building Regulations sign-off included
Double Storey Rear Extensions for Carlton Homes
Carlton has a strong mix of Victorian terraces, 1930s semis and post-war family homes, and most of them share the same problem: a cramped kitchen at the back and one bathroom for the whole household. A double storey rear extension solves both in a single project. Downstairs you gain an open-plan kitchen-diner opening onto the garden; upstairs you add a bedroom, a family bathroom or a main bedroom with en-suite.
Because the second storey sits on the same foundations, roof and scaffolding as the first, the cost per square metre is noticeably lower than building two separate single storey projects. For growing families around Carlton Hill, Standhill and towards Gedling, it is often better value than moving house once stamp duty and fees are counted.
We handle the full journey: measured survey, architectural drawings, planning application to Gedling Borough Council, structural calculations, Building Regulations and the build itself. You get one point of contact and a fixed written price before any work starts.
Best For
Semis and detached homes in Carlton with a reasonable rear garden, families needing an extra bedroom plus a bigger kitchen, and anyone weighing an extension against the cost of moving.
Good to Know
Most double storey rear extensions in Carlton need a planning application to Gedling Borough Council. We prepare and submit everything for you, and our applications have a 100% success rate to date.
Benefits of a Double Storey Rear Extension in Carlton
Twice the space for far less than twice the cost – here is why Carlton homeowners choose two storeys over one.
- Better value per square metre – foundations, roof and scaffolding are shared across both floors, so the upstairs space costs a fraction of the downstairs.
- Extra bedroom and bathroom – move from a 3-bed to a 4-bed layout, which typically adds 15-20% to the value of a Carlton semi.
- Bigger kitchen-diner – open up the rear of the house into a sociable family space with garden access.
- Cheaper than moving – avoid stamp duty, agent fees and the cost of a bigger mortgage while staying in the same schools catchment.
- Designed for your plot – we shape the design around your garden depth, neighbouring windows and the character of your street.
- One team, start to finish – design, planning, structural work and build all managed by us, with a fixed price agreed up front.
Our Process for Carlton Double Storey Extensions
A clear, staged process so you always know what happens next.
Free Site Survey
We visit your Carlton home, measure up, discuss your goals and give honest advice on what will work and roughly what it will cost.
Design and Drawings
Architectural plans are drawn for both floors, refined with you until the layout is exactly right.
Planning Application
We submit to Gedling Borough Council and handle any queries. Decisions typically take around 8 weeks.
Building Regs and Structure
Structural calculations, Building Regulations drawings and Party Wall notices are prepared before work begins.
Foundations and Shell
Groundworks, brickwork to two storeys, roof and windows – your home stays weathertight and secure throughout.
Fit-Out
Electrics, plumbing, plastering, kitchen and bathroom fitting, flooring and decoration to a finished standard.
Sign-Off and Handover
Building Control completion certificate issued, snagging completed and your warranty documents handed over.
Double Storey Rear Extension Costs in Carlton
Guide prices for 2026. Every project is priced individually after a free survey.
| Project Size | Typical Footprint | Guide Price | Typical Duration |
|---|---|---|---|
| Compact double storey | 3m x 4m per floor | £70,000 – £95,000 | 14-18 weeks |
| Mid-size double storey | 4m x 5m per floor | £95,000 – £130,000 | 16-22 weeks |
| Large double storey | 5m x 6m per floor | £130,000 – £175,000+ | 20-26 weeks |
📋 Guide prices include the structural build, standard fit-out and Building Regulations sign-off. Kitchens, bathrooms and premium finishes vary by specification – we itemise everything in your written quote.
Planning Permission for Double Storey Rear Extensions
What Gedling Borough Council Looks For
- Permitted development allows a double storey rear extension up to 3m deep on many houses, but strict conditions apply – most Carlton projects go through a full planning application instead.
- The extension must sit at least 7m from the rear boundary and match the materials of the existing house.
- Upstairs side-facing windows normally need obscure glazing to protect neighbours’ privacy.
- The 45-degree rule is used to check your extension does not overshadow next door’s main windows.
- Semi-detached and terraced homes usually need Party Wall agreements with adjoining neighbours – we arrange these for you.
Areas We Cover Around Carlton
Not listed? We cover most of the NG4 area and beyond – get in touch and we will confirm.
Double Storey Rear Extension Projects
What Carlton Homeowners Say
“Our double storey rear extension in Carlton went through planning first time. We now have a fourth bedroom and a kitchen-diner the whole family lives in. The fixed quote was exactly what we paid.”
“We nearly moved house but the numbers made no sense. This team extended our 1930s semi near Carlton Square over two floors – brilliant communication and the brickwork match is spot on.”
“They handled the Party Wall agreement with our neighbours and kept the site tidy the whole way through. The en-suite upstairs and the bigger kitchen have transformed our Carlton home.”
Double Storey Rear Extension FAQs – Carlton
In most cases, yes. Permitted development only covers double storey rear extensions up to 3m deep with strict height and boundary rules, so the majority of Carlton projects go through a full application to Gedling Borough Council. We prepare and manage the whole application for you.
Most Carlton projects fall between £70,000 and £130,000 depending on size and finish, with larger builds reaching £175,000 or more. You receive a fixed itemised quote after a free survey, so there are no surprises.
On site, expect 14 to 26 weeks depending on size and specification. Add around 8 weeks beforehand for the planning decision from Gedling Borough Council, plus design time. We give you a full programme before work starts.
Yes, most Carlton families stay at home throughout. We build the shell and make it weathertight before knocking through, which keeps dust and disruption to a short, planned window near the end of the project.
If you live in a semi or terrace, or your foundations sit within 3m of a neighbour’s structure, then yes. We serve the notices, talk to your neighbours and arrange a surveyor if one is needed, so the process stays friendly and on schedule.
Ready to Extend Your Carlton Home?
Book a free site survey and get a fixed written quote for your double storey rear extension – no pressure, no obligation.