Give your home the room it’s always needed
From a single-storey rear extension to a full wraparound, Red Loft Extension manages every stage in house — design, planning, structural work, and the build itself.
More space, without moving house
A home extension adds real, usable square footage at ground level — most often a bigger kitchen, a kitchen-diner that opens onto the garden, or extra living space for a growing family. It’s almost always cheaper than moving, and it lets you stay in the home, street and neighbourhood you already know.
Red Loft Extension manages every stage of the process in house: design, structural calculations, planning permission, party wall agreements, and the build itself — so you’re dealing with one team throughout, not five different contractors.
Four ways to extend a home
Shown from above — each diagram is the house’s outline before and after.
Rear Extension
Extends the back of the house into the garden — most often used to create a larger kitchen-diner.
Side Return
Fills in the narrow side passage alongside the house, often combined with a rear extension for one open space.
Wraparound
Combines a rear and side return extension into a single L-shaped space — typically the biggest ground floor transformation.
Double Storey
Adds space on both the ground floor and the floor above — more total space for a similar foundation and roof cost per square foot.
Real Red Loft Extension builds
Every photo here is a completed extension project, not a stock render.
Galley kitchen extension, finished with twin skylights and full-width garden glazing
From first call to finished room
Every project follows the same five stages, managed by one team throughout.
Consultation
A free, no obligation visit to discuss your goals and assess the garden and footprint.
Design
Architectural drawings and structural calculations tailored to your home and garden.
Planning
Permitted development checks, planning applications and party wall agreements handled for you.
Build
Foundations, structural steelwork, glazing and first fix, all project managed on site.
Finish
Kitchen fit-out, flooring and final snagging, with a full handover and 10 year guarantee.
How much does a home extension cost?
A rough guide — your exact figure depends on size, materials and the type of extension.
Fills in the narrow side passage. A cost effective way to widen a kitchen without a full rear build.
Our most popular extension. Creates a full kitchen-diner that opens directly onto the garden.
The biggest transformation — maximum additional space across one or two floors.
Final cost depends on size, materials specified and any individual internal specifications. Every quote starts with a free, no obligation consultation.
Home extension FAQs
Many single-storey rear extensions fall under permitted development and don’t need full planning permission, provided they stay within set size and height limits. Side return and wraparound extensions, and anything in a conservation area, are more likely to need an application. We check this for every property during your free consultation.
Most single-storey extensions take between 10 and 16 weeks from start to finish. Double-storey and wraparound projects typically take longer, depending on the scope of structural work involved.
If your extension is built up to or near a shared boundary or party wall, a formal agreement with your neighbour is usually required. We provide professional party wall surveyor services as part of our complete project management, handling notifications and agreements on your behalf.
In most cases, yes. We sequence the work to keep disruption manageable and keep your home as clean and dust free as possible throughout, though kitchen access is naturally more limited during the final fit-out stage.
Building control confirms that construction work meets safety and structural regulations. We work with our own trusted private building control partners to manage this process smoothly from start to finish.
Let’s talk about your extension
Free, no obligation consultation. We typically respond within 24 hours.