When most people need extra space in their home, they think about a loft conversion or extension. But there is another option that many people don’t know about – building a basement under the garden. This type of extension is a fantastic way to use dead space on your property and get the extra room your family needs. In this step by step guide to building an extension under your garden, you’ll learn everything you need to know to get started.
As well as adding value to the home, there are other great benefits of having an under garden basement:
The cost of building a basement under your garden in the UK can vary greatly depending on the size required and garden. However, since there is no underpinning required, it can be as much as half the cost of an under property basement, making it a great option to consider.
Things that will impact on the cost include:
Additional garden basement room costs include architect fees if you need one, structural engineer fees, planning applications and surveys.
In general, the cost of a basement conversion in London is between £4,000 and £6,000 per square metre.
Different authorities will have different policies outlining planning permission for under garden basements. It’s vital to know what you can and can’t do and what design is feasible and effective, so make sure you’re familiar with your local policies.
For example, Wandsworth recommends retaining half your garden, whereas Merton explicitly states you must not exceed 50% of any garden space. Also, Kensington and Chelsea limit the extension to half the garden and the depth of a single storey.
There may also be conservation area restrictions. If you have trees in yours or your neighbours garden, you will have to consider the impact of digging into your garden.
When planning your basement project, contact the local authorities to get up to date regulations. If you’re working with a build team, they will also be able to give you guidance and advice on how to build an underground room and what’s feasible.
When designing the layout of your under garden basement, it’s important to maximise the space to make it worth the investment. This is where an architect can add value to the project. Here are some planning points to keep in mind:
An important part of your layout plan is factoring in basement waterproofing. It’s best to have an expert put in a waterproofing course to make sure you have a guarantee. The last thing you want is a leak in your new space.
To make sure everything is taken into account professionally and to code, you will need to appoint a structural engineer to design a layout. A well thought out design will factor in the results of your planning survey, help protect your budget and keep the project on task
Once you have a solid plan for the structural layout, you can turn your attention to the interior design. Here are some points to consider at this stage:
It’s best to go through each of these points in advance. Without a proper plan, you might find you don’t have enough space for a bed or perhaps a bathroom isn’t a feasible option where you wanted it to go. Knowing in advance will help ensure your build team can run as smoothly as possible.
Building a basement under your garden is a great solution to many homeowner headaches. Whether you’d love more storage space or a home theatre, a basement is the perfect way to give that extra space you need. Here are some basement room ideas to get you started:
The possibilities are truly endless and can solve any of your current struggles.
Need some inspiration to design your basement? Here are some of the best under garden basement ideas to get your creative juices flowing.
By adding in wooden stairs and wood beams, the basement has a rustic charm and added character.
Who doesn’t love a bar in their own home? This space is perfect for entertaining friends and family.
An easy way to make your new basement feel like a luxury spa is to add in some wood paneling. This gives a luxurious sauna feel that will melt away the stress of the day.
When your kids need some extra space, a basement is a great idea. This adorable playroom is light, spacious and the perfect play for kids to make a mess. Just shut the door and visitors will never know!
Show off the unique features of a basement by leaving some of the stone and brickwork bare. This industrial look is a unique style guests will be wowed by.
Do you feel you could get more from your garden and basement? Maybe it’s time to dig deeper and find out. Contact us to discuss your project.