What are Single Storey Extensions?
A single storey extension is a solid-built extension attached to almost any part of the ground floor of your home. Every home extension is bespoke, creating a new space that seamlessly joins to the original house. Add extra space to an existing room or provide an entirely new room to your home.
Types of House Extension
Your Anglian design consultant and surveyor will talk to you about the best way to extend your home. They consider structural points, such as groundwork, drainage, electrics, plumbing, and building regulations. All our extensions are bespoke, so if you can imagine it, we can create it.
How Long Does a House Extension Take?
For a regular single storey extension, it can take three to four months from initial survey to completion. The installation itself should take three to four weeks. The time a home extension takes depends on its size, materials and whether or not you need planning permission. Our design team will discuss the estimated time with you before starting.
House Extension Roof Types
Extension Ideas
Why Choose Us for your New Home Extension?
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Planning Permission? Sorted
Planning permission isn’t required for most single storey house extensions. If it is though, we organise permissions and complete planning applications, taking on the hassle so you don’t have to. It’s all included in your quote.
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Free Design Consultation
We're here to help every step of the way when it comes to choosing windows, doors, and roofing for your extension. Our design consultant will visit your home to discuss your plans and best use of your new space.
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Long Guarantees
We provide a 10-year insurance-backed guarantee for the windows and doors of your extension. These products also come with a 15-year guarantee for sealed glass units. If you sell your home, you can transfer the guarantees to the new owner.

Compare Home Extension Designs at a Glance
Adding space to your home is an exciting process, but you might be wondering what the best approach is. Our guide can help you decide between a conservatory, orangery, or extension. Here are some of the main things to consider.
Reasons to Choose an Extension
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Common Questions About House Extensions
Currently, an extension on a terraced or semi-detached house can project up to six metres from your home . For a detached house, it’s up to eight metres. An extension should not take up more than half of your land or be taller than your current roof. Our surveyor will confirm if the project needs planning permission, but if it does, we take care of it all for you.
A home extension is one of the best ways to increase the value of your home. How much value it could add depends on size, position and its use. A single-storey extension is a popular way to increase the size of a kitchen or add a reception room. It can add 5-8% to the value of your home.
The cost of adding an extension to your home will depend on a few factors, including how large it is, the materials used, and any special details or features. Naturally, a larger extension using high-quality materials will generally cost more. With Anglian, we can provide a free no-obligation quote based on your plans and your home.
Depending on your home and your kitchen position, there are many ways to extend. Victorian terraces often have a narrow galley kitchen at the back with a small courtyard next to it. Many people choose to extend their terraced kitchen by adding a side extension or a wraparound extension. To expand your kitchen in a 1930s semi-detached house, add a single-storey extension with large patio doors at the back.
You don't have to hire an architect to build a home extension, but if it’s a big project this can help. Architects provide plans and guidance for homeowners and the builder you hire. Some building firms offer this too, but for more complex builds, it's a good idea to find an architect.

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