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how much does a house extension cost?

How Much Does A House Extension Cost?

Whether you want a bit more living space, need another bedroom or have plans for your dream kitchen, a house extension can provide your ideal space without the need to move home.

It can also add significant value to your property. But as with any home improvement, you’ll want to get a rough idea of how much it’s going to cost.

In this post, we’ll take a closer look at house extension costs, providing a general rule of thumb and the different factors that come into play.

Ball-park house extension costs

In truth, there’s no one-size-fits-all cost for a house extension. It goes without saying that a large two-storey project with a kitchen downstairs and en-suite above will cost a lot more than a simple single-storey extension.

All that said, a good rule of thumb for a well-built extension and high-quality finish is around £1,500-£2,000 per square metre. This will give you the base cost, before considering all of the extras which can add to that figure, including…

Structural work

Extending a house typically involves altering the existing living space in some manner. If you were adding extra space at the back of your house, for instance, you’d need to take out the back windows and doors, or even the back wall altogether, to create a harmonious finish.

Alternatively, you might need new structural steels adding to support the extra load of a second storey above your existing extension.

Whatever the case, these structural changes will always come at a cost. It’s important to factor these in, as there’s no way you’ll be able to compromise on structure – and compromising on the layout is probably the last thing you’d want to do.

Bathrooms and plumbing

Whether it’s an en-suite bathroom or a downstairs toilet, adding more living space to your property often calls for additional bathroom or toilet facilities. You wouldn’t want to go from a three-bed house to a five-bed, for example, if you were all sharing a single bathroom.

According to Victoria Plum, the average cost of fitting a new bathroom is around £6,500. Given that this figure is for fitting a bathroom in an existing space, it doesn’t include the additional cost of plumbing, which is required for new bathrooms.

Final touches

Let’s not forget the finishing touches. Do you want carpets or parquet flooring? Have you thought about the furniture for your extension? What about wood panelling on the walls?

While they may seem like small additions, these final touches are an important consideration for your overall house extension cost. You wouldn’t want to end up with a beautiful extension that’s unusable for a few months because it’s not quite finished.

Maximising value for your house extension cost

If you want to get a better idea of your house extension cost, we can provide an estimate based on our extensive experience with similar projects.

Once you’ve got an idea of the costs, our team is on hand to help you get the maximum value for that price. Considering everything from the shape, size and structure to final lick of paint, we can design, tender and manage the entire process to make sure you get the best possible house extension for your budget.

Ready to get the ball rolling? Brief us on your house extension project or book a free consultation.

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