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Single Storey Extension Cost: Your Comprehensive Guide

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A popular way of adding both value and space to your property is extending your home with a single storey extension but, what are the cost? This is one of the first questions that come to mind for most homeowners looking to extend their home, the cost.

In this guide, we’ll break down the single storey extension cost, by taking into account various factors that can influence it like size, location, and planning permission.

Breaking down the costs of a single storey extension

Different factors like size, materials, design and even the location can have a significant effect upon the costs of a single storey extension. As a rule of thumb, you can expect to pay anywhere from £1,000 to £3,000 per m2. For a typical 24m2 extension, you’d be looking at an estimated figure of around £24,000 to £72,000. Costs can always fluctuate and often this depends on the size but also the specifics of your home renovation project.

Variations across the country

It’s worth noting that costs can differ significantly across the whole of the UK. For example, the costs for a single storey extension in Scotland could be less than the costs of the same project in London. It’s advised to always consult with local builders and architects to get an accurate estimate for your local area.

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Using a house extension cost calculator UK

Several online tools can give you a rough estimate based on the type of property, what part you’d like to extend, and the property’s size and location. These can be a handy starting point, but for a detailed home extension quote, it’s best to speak with a professional.

Is it cheaper to build a single storey extension?

When it comes to extending your home, you might be indecisive on whether to go for a multi storey extension or a single storey one. Generally, building a single storey extension can be more affordable than a multi-storey one. This is because it often involves a simpler construction process and requires less complicated foundations.

However, the overall value should also be considered. A single storey extension might offer less additional living space compared to a two-storey one on the same footprint, so think about your long-term needs and goals.

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Understanding planning permissions

In many cases, single storey extensions can be built under permitted development rights, meaning you won’t need planning permission. However, there are limitations to consider, such as:

  • The extension should not be higher than the highest part of the existing roof.
  • It must not extend beyond the rear wall by more than 3m if an attached house or 4m if a detached house.
  • The total area should not cover more than half the land around the original house.

Consulting with local authorities

It’s good to consult with your local planning authority to ensure you comply with all the correct and up-to-date rules and regulations when it comes to extending your home.

Costs of a single storey extension and future considerations

Building costs can fluctuate, especially when the cost of living is on the rise. So when you start making plans to extend your home, keep in mind inflation, material costs, and other economic factors that might affect your final price. It’s always good to have a contingency fund, so that when you do go over your budget, it doesn’t break the bank.

Understanding the cost involved is a crucial first step in the process. From considering the single storey extension cost per m2 to exploring planning permissions, there’s a lot to take in.

Always consult with professionals who know your local area. They can guide you through the process, provide accurate estimates, and help you create your dream extension that takes your needs and budget in to account.

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Last Updated: January 8th, 2024

Phil Spencer

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