Building a home extension is an exciting project that can add real value and comfort to your property.

To get the most from your home extension it’s important to plan the project carefully, considering size and design to ensure that the result is practical, comfortable and affordable.

One of the biggest decisions you will need to make is how big your house extension is going to be. You will need to decide how many square metres of extra space you require and whether it should be one or two storeys high.

To set you off on the right path, here are few things you should know before extending your home.

Requirements of the House Extension

What is the new space going to be used for? Consider you and your family’s requirements both now and in the future – how much more space do you really need? How much do you value your outdoor space versus indoor space? Sometimes a bigger house extension is not always better.

Budget for Home Extension

Before you get carried away planning the size and scope of your new home extension it’s important to set yourself a strict budget. Realistically, your extension can only be as big as your budget stretches. When working out the size of the house extension you can afford, make sure you’re factoring in all the different costs associated with building an extension to your home.

The main costs that the home extension project may incur are:

  • Building and labour costs
  • Architectural fees
  • Structural engineer fees
  • Surveyor fees
  • Planning permission
  • Building control fees
  • Project management costs
  • Interior decorating costs

Meeting Building regulations

Make sure you have a sound understanding of how building regulations may impact the maximum size of your house extension or consult an expert for advice.

Generally, home extensions don’t require planning permission if they are less than 6 metres in size (or 8 metres for a detached house). If your home has already been extended since 1948, then the size of the existing extension must be factored in as it will take up some of your permitted development allowances.

Other important permitted development restrictions to note when planning your extension include:

  • The extension must not be taller than the existing house.
  • The extension should not take up more than half of the garden/outdoor space.
  • A single-storey extension can’t be more than four metres high. If the extension is within two metres of the property’s boundary, it can’t be more than three metres high.

Adding value to your property

Try to add maximum value to your property for your budget. Adding a second storey to your extension can add a lot of value and may not be as expensive as you think.

Adding a two-storey extension rather than a single storey extension won’t double the price as a lot of the expense comes from building the foundations and roof of the extension.

Always remember to consider how your extension will look alongside your original property. Choose an extension that will complement and enhance the size and style of your property rather than impose on it.

At MDA Architectural Services, we provide architectural services for home extensions of all shapes and sizes. For help and advice with your project, give our team of experts a call on 01204 275 185.