House extensions generally cost between £1,800 and £3,00 per square metre, with entire project prices ranging from £30,000 to £140,000 for building a single-storey and £108,000 to £180,000 for a double-storey. The total cost depends on your location, materials, labour rates, and interior finishes.
Your house is a place that progresses with you over time. As your family grows, your behavioural modifications, or your desires change, you might think that your existing living space requires a small additional room to expand. To make your home extension successful and more appealing, it is key to set a specific budget.
In this blog, you will explore the cost of the different house extensions and the factors that impact the expenses.
Average Cost of House Extensions
House extensions mean adding additional living area to your home, as they minimises the stress and cost of moving. Understanding the average cost of a home extension helps you to plan your budget accordingly. But the total cost fluctuates based on some features like the size of the project and the different designs you select.
The average cost for home extensions in the UK is as follows:
Single storey: £1,800 – £3,000
Double storey: £1,500 – £2,500
Loft conversion: £1,400 – £2,500
Different House Extension Styles and Their Costs
The cost of a home extension changes based on the styles you select. Every type of extension has a distinct style, layout, and price range. So it is important to understand which one is suitable for your home and lifestyle before determining which one to choose.
Single-Storey House Extension Cost
Single-storey extensions are an affordable and practical way to expand your space. They are a popular option as they are simple.
- The costs generally range from £1,900 to £2,400 per m².
- The factors that impact costs are size, material, and site conditions.
Multi-storey House Extension Cost
Multi-storey extensions offer additional space over two floors that makes them perfect for bigger families. Although initial expenses are higher, cost per additional m² tends to be lower.
- The costs are typically 50% higher than a single-storey extension.
- The expenses are influenced by framework additions and structural intricacy.
Loft Conversion Cost
A loft conversion provides additional space and is a less expensive way to expand a house without changing the footprint. These projects are perfect for the addition of bedrooms or home offices.
- The costs typically range between £1,200 to £2,000 per m².
- The key features that impact the cost include staircase installation, insulation, and roof alterations.
Basement Extension Cost
Basement extensions are frequently the most expensive choice but can be beneficial where lacking surface area. These projects have extra excavation and water-resistant standards.
- The costs genrally range from £1,200 to £2,800 per m².
- The expenses change depending on the site access, site conditions, and waterproofing.
Factors that Influence Costs
1. Location
The cost of a house extension can vary greatly based on which area you live in the UK. areas such as London and the South East have higher construction costs than other regions.
2. Materials
The material you select for the extension, like timber, brick, or uPVC, will directly influence the cost. High-quality materials are more expensive.
3. Size and Complexity
The cost increases if the extension size is bigger and more complex. Some aspects such as shape, size, and design complexity play a key role in total expense.
4. Design and Architectural Services
When you hire a designer or an architect to extend your property, it can add more costs. But their experience can lead to a well-organised and effective extension.
5. Utilities and Services
When you add utilities such as plumbing and electricity to your new space, they directly influence costs. Always remember these supplies in your budget.
6. Planning Permission and Building Regulations
Based on your project’s size and type, you might require planning permission, which can incur extra charges.
Conclusion
Home extensions are the perfect way to create more living space, minimising the stress and cost of moving. However, the total cost is based on factors like the type and size of the extension, location, materials, design complexity, labour and planning requirements. When you understand the costs, it helps you establish practical spending limits from the start.
Homeowners can make reasoned decisions and plan an extension according to their requirements while adding extra benefits and operational value to their property.