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How much does a 2 storey extension cost?

UK Home Improvement

How Much Does A 2 Storey Extension Cost?

Expanding your home to create additional living space can be an exciting and rewarding project. As well as adding more space, a home extension can enhance its aesthetics and increase property value.

A 2 storey extension, also known as a double storey extension, is often seen as a practical solution for families who need more living space but don’t want to go through the stress and costly process of moving house. 

But how much does it actually cost to add a 2 storey extension to your property?

The cost of every type of extension depends on a variety of factors and this is the case for 2 storey extensions. In this article, we’ll explore the key aspects that influence the cost of a double storey extension. 

Read on for more…

What is A 2 Storey Extension?

A 2 storey extension is an extension type that covers two levels. Unlike single storey extensions that expand a property horizontally along the ground floor, a 2 storey extension provides extra space across two floors. This type of extension is ideal for homeowners who are looking to add significant square footage without sacrificing outdoor space like driveways or gardens.

Typically, double storey extensions are used to create a combination of living spaces. Some examples include:

  • Ground floor: This could be used to expand the kitchen or to create an open-plan living area or dining rooms.
  • First floor: The upper level can be used to accommodate extra bedrooms, bathrooms or even a home office.

When designed effectively, a 2 storey extension can help to maximise the functionality and value of a property. 

Benefits Of A 2 Storey Extension 

Choosing a 2 storey extension offers a range of benefits, making it an attractive option for many homeowners. Here are some of the key advantages:

Increased living space: The most obvious benefit is the additional space an extension can provide. Whether you need extra bathrooms, more bedrooms or a bigger kitchen, a 2 storey extension offers the flexibility to meet all your needs.

Cost-effective solution: While a 2 storey extension costs more than a single-storey, it often ends up being more cost-effective per square metre. This is because the foundation and roof will already be included in the design, allowing you to maximise value without doubling the cost.  

Improved property value: In some cases, a well-designed 2 storey extension can massively increase your home’s market value. Adding more usable space and modernising your property can make it more appealing to future buyers and you may get a higher fee when it comes to selling it. 

Avoids the stress of moving: Moving to a bigger home can be both costly and stressful, not to mention the hassle of having to uproot your entire family. A 2 storey extension allows you to stay in your current home while adapting it to suit your evolving news. 

A custom design: With a 2 storey extension, you have the freedom to design the space exactly as you want it. Whether it’s an open-plan layout, extra bathrooms or specific roof dimensions, the possibilities are endless!

How Much Does A 2 Storey Extension Cost? 

The cost of a double storey extension can vary widely depending on the size, location and complexity of the project. However, on average the cost of this kind of extension is around £1,500 to £2,450 per square metre.

Therefore, a basic build will probably cost you between £60,000 to £70,000 overall whereas more high-end projects can exceed £100,000 in some cases.

It’s important to note that these figures are estimates and can vary based on your specific project. 

Factors That Influence A 2 Storey Extension Cost

Several factors influence the cost of a 2 storey extension. This makes it important to consider all aspects before planning your budget. Here are some of the key factors to bear in mind: 

Type Of Extension 

The design and purpose of the extension play a significant role in the cost. For example:

A standard extension: A simply designed 2 storey extension without any major structural alterations will often be more affordable. 

Bespoke extension: A custom-built extension with unique designs, complex features or premium finishes will cost more.

Side extensions: A side extension is more complicated than a rear extension as it might require additional permissions or structural work. This can add to the cost of the project. 

Area / Location 

Where you live can significantly affect the cost of a 2 storey extension. Costs tend to be higher in cities, especially in London and the South East. This is due to the fact that there are higher labour and material expenses in these areas. 

In contrast, costs may be lower in regions with more affordable construction rates and in rural locations.   

Materials 

The materials you choose for your extension will also impact the final cost of the project. Premium materials such as natural stone, aluminium windows or high-end tiles will increase your expenses, whereas standard materials can help keep costs down. 

Some of the key materials used to construct an extension include:

  • Brickwork
  • Roofing materials 
  • Windows and doors 
  • Flooring and finishes  

Size 

The size of the extension is a major factor in determining the overall cost. A larger extension will naturally require more materials and labour, increasing the price. Complexity also plays a role. If your extension requires major alterations, especially to load-bearing walls, then costs will rise. And, if there is limited site access, this can increase labour costs as it makes construction more challenging.

Final Thoughts

A 2 storey extension is a practical and cost-effective way to add significant space and sometimes added value to your home. By carefully considering the type of extension, materials, location and size, you can make more informed decisions that suit your exact budget and needs. Whether you’re growing the family or simply want to enhance the functionality of a property, a double storey extension can be a worthwhile investment. 

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