Embarking on a house extension project can be an exciting endeavour, offering the opportunity to transform your home into a more spacious and functional living space. However, understanding the costs involved is crucial for any homeowner. It’s essential to consider factors such as materials, labour, planning permission, and unforeseen expenses to ensure a realistic budget for your project. Below, in this short guide, we break down the key factors that influence the cost of a house extension, ensuring you’re well-informed before you begin. Read on to learn more.
- Size of the Extension
The size of the extension is the most obvious factor affecting cost. Generally, the larger the extension, the higher the cost. The cost is typically calculated per square metre, with larger extensions often benefiting from economies of scale. For instance, a modest single-storey extension might cost between £1,200 and £1,500 per square metre, whereas larger or more complex extensions could see higher per square metre costs.
- Materials Used
The choice of materials plays a significant role in determining the overall cost. Standard materials like brick and block are typically more affordable, whereas using high-end materials like glass or bespoke stone can significantly increase costs. It’s also important to consider the long-term benefits of higher-quality materials, such as better insulation and durability, which can save money in the long run.
- Labour Costs
Labour costs can vary widely across the UK. Generally, you’ll find higher rates in London and the South East compared to other regions. The complexity of the project also influences labour costs; a straightforward extension will require less skilled labour than one with bespoke features or complex structural changes. It’s crucial to get detailed quotes from contractors to understand these costs fully.
- Location and Accessibility
The location of your property can impact the cost of an extension in several ways. Urban areas, especially in London, often have higher costs due to factors like parking restrictions, limited access, and the need for additional site security. Rural locations might incur additional transport costs for materials and labour.
- Design Complexity
The more complex your design, the higher the cost. Simple, rectangular extensions are generally more cost-effective than complex designs with curves or multiple levels. Additionally, if your design includes large expanses of glazing, bespoke architectural features, or requires significant structural work to integrate the extension with the existing house, this will increase the cost.
- Planning Permission and Building Regulations
While not all extensions will require planning permission, those that do will incur additional costs for the application process. Building regulations approval is a must for any extension, regardless of size. These regulatory requirements ensure the safety and quality of the build but do add to the overall cost.
- Interior Finishes and Fittings
The cost of interior finishes and fittings can vary as much as the cost of the build itself. Choosing high-end finishes, bespoke kitchens or bathrooms, underfloor heating, or bi-folding doors will add to the final bill. Remember to allocate a portion of your budget to these finishing touches, as they can make a significant difference to the final look and feel of your extension.
- External Works
Don’t forget to factor in the cost of any external work. This could include landscaping, redoing patios, or external lighting. These elements might seem secondary but can add up and are essential for the overall finish of the project. Considering these details in your budget ensures a comprehensive and accurate estimate for your house extension.
Interested in a House Extension?
At Steve Rolt Home Improvements, we specialise in crafting the ideal house extensions tailored to your unique needs. We understand that extending your living space is not just about adding square footage; it’s about enhancing your home life.
Whether you dream of an open-plan area perfect for entertaining or a serene workspace, our team is dedicated to bringing your vision to life. Our approach starts with a personal consultation to understand your requirements and budget, ensuring that the end result aligns perfectly with your expectations.
Proudly serving Hertfordshire, Essex, Cambridgeshire, and the surrounding villages, we manage your project from concept to completion. Our expertise includes navigating planning permissions, even in listed buildings or conservation areas.
With our skilled tradespeople and FENSA registered window fitters, you can be assured of quality work that meets all building regulations. Ready to expand your home with Steve Rolt? Email us at steve@steverolt.co.uk or call us at 07739 723103.