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Home Extensions

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A Home Extension is the perfect way to add space and value to your property.

Home extensions come in different shapes and sizes; from side extensions, to double storey extensions or single rear extensions – there are lots of options to suit your needs!

Home Extension

I think I want to extend my home – how can Robinsons help?

Home Extensions can be a big home project with various permissions (and, often, neighbours feelings) to navigate, which is why we are here to help!

Robinsons Architecture & Design provide a full service, guiding you through every step of the process. Our team like to do an initial consultation in order to learn about your vision and what the space will be used for, your budget, and your timeframe. We can then chat through everything you’ll need to consider, from planning permissions to drawings, and provide you with a quotation for our services as well as what costs you can expect when it comes to completing your exciting new project.

What is involved in extending a home?

Under your permitted development rights, you can undertake some extension projects without the need for planning permission! If you have a detached, single-storey home then you can extend by 8 metres to the rear, and if you have a detached double-storey home you can extend by 3 metres. These permissions are reduced if you have a semi-detached or terraced house and there are also height restrictions and boundary restrictions in place, and there are a few other regulations to consider. This is why it’s usually best to consult with a professional (like us!) before putting your plans into motion. You may also need a Party Wall Agreement if you share a wall with a neighbour and are planning to extend.

You will have a lot of aspects to consider; from your insurance and the kind of property you own (freehold or leasehold), to obtaining structural engineer calculations and finding a builder. Sounds like a lot to balance, right? Our team are here to make this easier for you.

How much can I expect to pay?

The price of a home extension can vary drastically due to the fact you can make them as small or big as you need them. It is often recommended that you should set aside an additional 10% of your budget for unexpected additional works to ensure your project can be completed! Pricing for a basic extension tends to average at around £1500 per square metre at present, though this can be higher if you are based in the South East & London.

Cottage Home Extension
Modern Home Extension with Bifolding Doors

Will my extension add value?

Although demand for your location can play a big part in if value will be added to your property, it is usually recognised that home extensions add between 20% and 25% to the value of a property. This can also vary depending on the use of the new space, with additional bedrooms – for example – often being sought after.

If you are looking to extend your home with the sole purpose of adding value in order to sell and relocate, we always recommend speaking to a trusted local estate agent. They will be able to indicate if your plan should add value to your home, which may help to inform your budgeting for the project or if you should look to save this money as a deposit.

Ready to take the next step or find out more? Get in touch with our fantastic Architecture & Design team today for a no-obligation chat by clicking here.


Robinsons Group
Robinsons Group
Robinsons Group
Robinsons Group
Robinsons Group

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