If you’re planning a house extension in Bolton or the surrounding Greater Manchester area, one of your first questions is likely, “How much is this going to cost?” The answer isn’t always straightforward, but with the right guidance, you can budget confidently and avoid unexpected surprises.
Understanding Extension Costs
The price of a house extension depends on several key factors – the size, complexity, and quality of the build being the most significant. A basic single-storey rear extension will generally cost less than a multi-storey or wrap-around build, and high-end finishes will naturally increase the overall spend.
As a rough guide, you might expect a typical single-storey extension to fall somewhere between £2,000 and £3,000 per square metre. Double-storey extensions can sometimes be more cost-effective per metre squared, but the added complexity means planning, structure, and finish need careful consideration.
What Affects the Cost?
Some of the most influential factors on your final bill include:
- Groundwork and foundations – These can vary significantly depending on the condition of the land.
- Planning permission – If required, this adds time and potential cost.
- Design choices – Open-plan spaces, bi-fold doors, roof lanterns, and smart home tech all add value, but come at a cost.
- Location – In and around Bolton, labour and materials are often more competitive than in southern regions, but prices can still vary from one postcode to another.
How to Stay on Budget
One of the best ways to keep costs under control is to work with a reputable local builder who can provide a clear, transparent quote. At Crossman & Walsh, we guide you through each stage, helping you make decisions that align with your vision and your budget.
We always recommend factoring in a contingency of around 10–15% to cover any unforeseen extras. It’s also worth investing in good design early on – this helps avoid changes later in the process which can become costly.
Final Thoughts
House extensions can be one of the best investments you make in your property – not just financially, but in how they improve everyday living. If you’re based in Bolton or Greater Manchester and considering an extension, we’d be happy to offer guidance and a free, no-obligation quote. You might be surprised at what’s possible within your budget.
