Modern architectural design company

Home extensions

Thinking about extending to add light, space and value to your home? Here's what you need to know to enjoy a successful extension project.

A well-planned home extension has the potential to turn even the humblest of properties into a comfortable, stylish and light-filled home. With the right design and execution, you can create a wonderful new zone that not only transforms the way you interact with your living environment, but also adds significant value.

One of the big advantages of adding more space to your existing home is that you won’t have to pay stamp duty or agents’ fees, which is a major benefit of not moving home, instead use this money creating a truly tailored space that suits your family.

Whether you would like a larger kitchen, new bedroom with en-suite or more open plan living. Daking designs offer a free property consultation to help you decide the style of extension which will work best for you, your family and your property.

Planning Permission Required?

Yes, in most cases planning permission will be required for extensions to your home, however if you are planning a single storey extension this may fall under Permitted Development, meaning planning permission is not required.

Visit the Planning Portal Website and see the types of options that may be available to you and provides information about your permitted development rights and allowances. We are always at the end of the phone if you have any queries or questions.

Building Regulations

Almost every type of home extension will require formal Building Regulations approval. Building regulation drawings are detailed construction drawings which need to be submitted and approved by your local Building Control department. They cover a wide range of elements including:

  • Foundations - ground conditions, depth, damp proofing and radon protection
  • Floors and walls - structure and strengthening, insulation and sound proofing
  • Roofs - flat or pitched, insulation, supports and beams, headroom
  • Drainage - connections to existing drains, manholes and water supply Electrics, power and heating Windows, doors and ventilation and disabled accessibility
  • Fire safety - escape routes and smoke detectors. In addition if an extension is planned to be two or more storeys, the plans will also need to cover
  • Sound-proofing - particularly in any sleeping accommodation
  • Fire escape - from upper floors

A building control surveyor will inspect your extension at various stages and will be responsible for issuing a completion certificate upon final inspection.


Daking Designs will produce the drawings required to satisfy local council’s requirements.

Whether you need planning permission or just building regulations we will prepare and submit these on your behalf taking all the stress away from you.

How Much a Single or Two-Storey Extension Will Cost?

You should allow for around £1,500–£2,500/m² for a straightforward extension. The standard of specification you choose will have an enormous influence on the build cost. On average, an excellent finish is 40% more than a standard finish. A two-storey extension will not cost much more per m2 because, aside from the extra interior fixtures and finishes, you are only adding walls and floor joists — a roof and foundations are required whether your extension is single or two storey.


A well designed extension can have a massive impact upon the way you live with the extra benefit of saving money on stamp duty and other fees which would be included if you decided to move home.

Sound good? Contact us today for a chat regarding your project, we offer a free no obligation quotation.