Single or double storey house extension graphic

Deciding between a single and a double storey extension isn’t easy, but each one does have its benefits that can really make a big impact on your project as a whole. Although both are a great investment, a little bit of extra research really can go a long way in helping you make the right decision. It is a big change, after all.

To make the decision more straightforward, we’re breaking it down into four separate areas that have their own pros and cons.

The Money Perspective

The first place to look is at the money behind the two projects. This is one of the biggest motivators for the decision either way, in most cases. The simple fact of the matter is that a single storey house extension is almost always going to be cheaper than a double at the same property. It stands to reason; they use fewer materials and less labour.

What is something that needs to be noted however though is that a double storey extension doesn’t actually mean double the price. Because much of the structural work is in place and there’s still only one project being carried out that only needs one foundation and one roof, the price difference isn’t actually as significant. A double storey can be much better value for money when looking at the value added to a property. This shouldn’t be a winning factor, but it is a viewpoint worth thinking about.

The Space Discussion

The space differences between single or double storey house extensions is something that goes without saying. A double story house extension of course has more available space than a single storey house extension does. Usually double, in fact, since it’s the same size and just on another floor of the property. It is this extra space that you’re paying for.

The Build Process

The build process is the next area to look at before you make up your mind about what’s the best option is the build process. The build itself is a big thing to undertake. It has a big impact on home life and can last a long time depending on the finer details of the project.

Typically, single storey extensions can be built in 3 to 4 months, which is relatively quickly for the size of the project. A double storey extension on the other hand typically takes around 6 months, since it’s a bigger project. That’s a long time to be without certain areas, but with the right project management or build schedule, you’ll be able to minimise any inconveniences.

The Planning Process

Even before the building work begins, there’s the aspect of planning that’s well worth thinking about. Planning permission is important for most projects to come to life, and without it, nothing can really take place without it, but for smaller projects, this isn’t actually needed.

Single storey house extensions are typically eligible to meet Permitted Development requirements. That means there’s no need for planning. If the extension is larger, then even then prior approval applications might be able to prevent the need for full planning. Double extensions are completely the opposite. You’ll more often than not need to use full planning, and that can be more time consuming and more costly, but in the grand scheme of things, it does give you much more room to breathe and create the project you truly want.

The Conclusion

All in all, whether you want a single or double storey house extension, you’re making a transformational change to your home and giving yourself a new lease of life. They are an amazing asset to your property that will give you more space and your property more value, and the benefits to your home life can be truly astronomical.