Building an extension is a big job and we totally get that at first it can definitely seem overwhelming. One of the best pieces of advice we can give is to get a good idea of what you’re taking on from the very beginning, and that means knowing how much it will cost you. Of course, it’s not as easy as giving an exact figure, but hopefully, this article will help you gauge how much you’re likely to spend depending on the size of your project.

What will affect the price?

Before we look at the figures, it’s worth noting that there are many factors that will affect the cost of your project. Some of those, include:

  • The size and shape of the extension, including the type of roof
  • How many storeys you’re planning
  • The quality of the build (ranging from budget to luxury)
  • How much additional support you’ll need – or how much you can take on yourself
  • The simplicity of the extension, for example, the price will rise if it contains a kitchen or bathroom

Price per metre squared

In short, your extension could cost you anywhere between £1,000 to £4,000 per metre squared (excluding VAT) – and that’s just for the shell only, not the furnishings and fittings. This price range will differ depending on whether you’re wanting to build a budget extension or are considering a more luxurious finish.

Single and double-storey extensions

On average, you can build the shell of a 30 metre squared single-storey extension for around £35,000-£50,000. 

If you’re exploring the idea of building a 30 metre squared double-storey extension, then the general rule is to add at least 50 per cent to the price you would pay for the single-storey extension. So, you’d be budgeting nearer £55,000 minimum, and again, that’s for a budget shell.

Additional costs to consider

In addition to the actual build, you need to remember that there are other costs that must be considered. Those include:

  • Architect fees
  • Structural engineer
  • Surveys
  • Planning permission (if required)
  • Building regulations
  • A party wall agreement (if needed)
  • Pre-groundwork jobs, including digging out the foundations
  • Working around or correctly moving protected trees
  • The furnishes and fittings, including windows and doors

How to make the most of your space, at the best cost

Whether these figures have surprised you or not, one thing for sure is that you’re probably looking at ways to cut costs.

If there’s one thing you should not look at doing on the cheap, it’s the help – and by help, we mean architectural advice and support from a professional company like Keenan Project Designs. Working with industry experts will ensure you’re getting the most of your extension, at the best possible overall cost. The team at Keenan will provide you with priceless advice on where you should be spending your budget, including where unnecessary costs can be avoided. Those at Keenan will also be able to advise on alternative solutions for your home renovation, to meet your requirements, including the likes of a loft extension.

Ultimately, with the right team by your side, you’re not only sure to get the most of your space but you’re guaranteed to get an honest idea of how much your project will cost, which means no unexpected surprises.

Are you ready to build your extension?

If you are looking to build an extension, then get in touch with Keenan Project Designs. Not only are we a RIBA Chartered Practice, but our whole ethos is based on being reliable and trustworthy, without compromising on quality. Our services span Warwickshire and beyond, including Rugby, Coventry, Leamington Spa, Kenilworth, Northampton and Solihull.

Get In Touch To See How We Can Help
With Your Project 0800 233 5787

Get In Touch To See How We Can Help With Your Project 0800 233 5787

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