Side Extensions Clifton
Make the most of the unused strip down the side of your Clifton home. A side extension turns a narrow passage or side yard into a bright, usable room that flows with the rest of your house.
We are a local Clifton team with over 15 years building side infill and side return extensions across the estate, from the older properties near Green Lane to the newer builds toward Farnborough Road.
- Free site survey across Clifton
- Full plans and Building Control handled
- Fixed written quotes, no surprises
Turn Wasted Side Space Into a Room You Use Every Day
Many Clifton houses have a slim gap to one side, either a shared drive, a side alley, or a narrow strip of garden. On their own these spaces do little. Build across them and you can widen a cramped kitchen, add a utility and downstairs WC, or create a bright dining area that opens onto the garden.
Clifton has a real mix of housing, from the post-war council-built semis around the older parts of the estate to the private developments built later. Each type suits a slightly different approach. A semi with a side driveway is ideal for a full side infill, while a terraced home may only need a narrow side return to square off the kitchen.
We survey the plot, check the boundary and any drains, and design the extension to sit naturally against your existing brick and roofline. The aim is a room that looks like it was always there, not a bolt-on.
Why Clifton Homeowners Choose Us
Local team, local knowledge. We know the ground conditions across Clifton and how the local Building Control team likes plans presented.
Quick Facts
Typical build time: 8 to 14 weeks. Most single side extensions on Clifton semis fall under permitted development, subject to size limits.
What a Side Extension Adds to Your Clifton Home
- More usable width – a narrow galley kitchen becomes a proper family space by borrowing the side gap.
- Better layout downstairs – room for a utility, pantry, or downstairs WC without losing garden space.
- Added value – a well-built side extension typically returns more than it costs on Clifton resale prices.
- More natural light – roof lanterns and side windows brighten what was often a dark internal room.
- Keeps your garden – unlike a rear extension, a side build uses dead space and leaves the lawn intact.
- Seamless finish – matched brick and roof tiles so the extension blends with the street scene.
Our Side Extension Process in Clifton
Free Site Survey
We visit your Clifton home, measure the side plot, and talk through what you want to achieve.
Design and Plans
Our team draws up plans and, where needed, a permitted development or planning application.
Approvals
We handle Building Control, any party wall notices, and the local council paperwork.
Groundworks
Foundations, drainage checks, and a damp-proof course laid to the boundary.
Build and Roof
Brickwork to match your home, then a tiled or flat roof with lantern if chosen.
Fit Out
Plastering, electrics, heating, flooring, and decoration to finish the room.
Handover
Final checks, completion certificate, and a full sign-off before we leave site.
Side Extension Costs in Clifton
Every home is different, but these 2026 guide ranges give a realistic starting point for Clifton projects.
| Type of Side Extension | Typical Size | Guide Cost (GBP) |
|---|---|---|
| Narrow side return (kitchen widen) | Up to 6 sqm | £22,000 – £32,000 |
| Single storey side infill | 10 to 15 sqm | £35,000 – £52,000 |
| Larger side extension with lantern | 15 to 20 sqm | £50,000 – £70,000 |
| Side and rear combined | 20 sqm plus | £65,000 – £95,000 |
Figures include structural work, brickwork, roofing, and a standard fit out. Kitchens, high-end glazing, and bespoke joinery are quoted separately.
📋 Planning Notes for Clifton
Most single storey side extensions in Clifton fall under permitted development, but a side extension is more tightly controlled than a rear one. Key points to know:
- Width limit – under permitted development a side extension can be no wider than half the width of the original house.
- Single storey – side extensions above single storey usually need full planning permission.
- Boundary and party wall – if you build up to a shared boundary, party wall agreements may apply, common on Clifton semis.
- Article 4 and estate rules – a few Clifton streets have added restrictions, so we always check before design.
We confirm the right route for your specific address during the survey and handle every application for you.
Side Extensions Across the Local Area
Not sure if we cover your street? Get in touch and we will confirm.
Recent Side Extensions
What Clifton Homeowners Say
Real reviews from side extension projects across Clifton.
Our kitchen in Clifton was tiny and dark. The side infill they built gave us the family room we always wanted, and the brick matches perfectly. You cannot tell it was added.
They handled all the party wall paperwork with our neighbour, which I was dreading. The team was tidy, on time, and the new utility room is exactly what our Clifton semi needed.
From the free survey to handover everything was clear and the quote never changed. The roof lantern makes the whole space feel huge. Highly recommend for anyone in Clifton.
Side Extension FAQs for Clifton
Many single storey side extensions in Clifton are allowed under permitted development, provided they are no wider than half the original house and stay single storey. Anything larger, or a two storey side build, usually needs full planning. We check your exact address and handle the application.
A narrow side return in Clifton starts around £22,000, while a full single storey side infill typically runs £35,000 to £52,000. The final figure depends on size, glazing, and fit out. We give a fixed written quote after the free survey.
Most Clifton semis with a side driveway or alley are ideal for a side infill. We check the boundary, drains, and available width during the survey to confirm what will fit and look right against your home.
Most single storey side extensions in Clifton take 8 to 14 weeks on site once approvals are in place. Design and permissions add a few weeks before that. We give you a clear programme so you know what to expect.
If your side extension is built close to or on a shared boundary, which is common on Clifton semis, a party wall notice to your neighbour may be needed. We manage this process for you so it is done properly and on time.
Ready to Plan Your Clifton Side Extension?
Book a free, no obligation survey and get a fixed written quote from a local team you can trust.