For an average single storey extension of 4m x 5m, the build cost would therefore be £30,000upwards for basic quality, from £38,000 for good quality, and from £44,000 for excellent quality. For an accurate estimate of how much your single storey extension will cost Contact us today.

We are glad offer a 10 Year Insurance Backed Guarantee for all our work for your peace of mind, a Building Control Certificate on completion, Electrical certificate for any electrical works and a Fensa certificate for any windows and doors fitted.


Building an extension. Planning permission is not required provided that: 1. The ground area covered by the extension and any other buildings within the boundary of the property, excluding the original house, is not more than half the total area of the property, with no planning permission you can come out to 4m from the house and as wide as the back of your house in this case a building control notice will be needed which our experts will take care of all this for you.

Why Choose a 1 storey extension:

  • Adds Value to your property
  • Create extra living space in your home
  • No Planning Permission Needed
  • 10 Year Insurance Backed Guarantee
  • Free Survey
  • Free Quotation

Building a single storey extension is the perfect way to create extra living space in your home, and might allow you to expand an existing small kitchen into a kitchen dining and living space. It might also give you the extra space to add a utility room, a cloakroom or boot room. In other words, a single storey extension will allow you to transform the downstairs of your home to better suit your lifestyle.

Building this type of extension is also the perfect opportunity to get more natural light into interiors with the addition of rooflights and much sought after bi-fold doors. They are a good alternative to moving house, too – just think of the savings you’ll make in fees like moving van hire and stamp duty alone.

You can Book an Appointment today for one of our Surveyors to Come and Quote you on your Dream
We also provide CAD Drawings to give you the real
feel for your Extension.

Get a Quote