With DIY projects on the ever increasing up, it seems like everyone on social media is attempting some form of self-built/self-created project and showing it off to the masses for likes and saves. You can hardly scroll through Reels or TikTok’s without a tutorial on how to make your own puff quilt or upcycle a chair.

This puts forward the question, how much DIY is allowed when it comes to our homes? Surely the reason there are professional tradespeople that have been trained and upskilled to do specific roles is because it takes a very particular set of skills and supervision to complete certain jobs, right?

In a way!

It will largely depend on the type of work you’re looking to have done, but if you own the house and the work you’re having done doesn’t impact any one else’s or protected land, you should be ok. However, we wholly recommend double checking with your local authority before moving forward with any work.

When it comes to minimal interior changes such as paint or doors etc, again with the homeowner’s permission, you’re good to go with that without having to do extensive research prior.

This brings us on to the topic of our blog which is “Are DIY Extensions Allowed?” and this is another one of those questions where there isn’t a simple yes/no answer. There are a lot of factors to take into account when taking on a project of this size and we would recommend seeking the advice of your local council first.

We can certainly highlight some of the points to think about when considering building your extension yourself.


Deciding how much you realistically have available to complete this project is so important, knowing your limits is vital to making sure you don’t end up paying through the nose for something that could have been cheaper by hiring a professional!

Being honest with yourself and creating a detailed cost break down of where you’d like to spend your money will also help make sure you’re building within budget.


Have you decided how big you’d like your extension to be? It can be very easy to accidentally overestimate your needs.

To help with your decision, visualise what you want the space to be used for, start thinking about how it will flow with the rest of the house and garden. With Habattach, when we do a site survey with our customers, we mark out on the ground how big the HAB will be to help our customers see what to expect.


Similar to the above, imagining the layout of your new extension is super important. This will help you figure out the size and shape of the space. This will also help you see how the space is going to link with the rest of the house, you don’t want your extension to feel separated from the rest of the house, ideally it needs to flow as one.


Make sure you consider how your household might use your home in the future. What is working for you now might not work for you in the future. By considering making the space multifunctional and adaptable, you add much more emotional value to the home.

Planning permission:

Any time you alter an existing residence, it’s important to understand if you need any formal permission from your council’s planning department.

It’s possible the project might fall under permitted development rights which would mean a planning application is not required, however there are circumstances where your property or project does not qualify for permitted development, so we always advise for you to check with your local authority what you can and can’t do. Each area can have their own set of guidelines, so make sure you’re researching the area you intend to build upon.

So, while we can’t give a definitive answer due to the amount of variable involved with building an extension, we thought it would be helpful to outline a few things to think about when considering going down the DIY route. The most important thing to remember, whether you decide to hire a professional or tackle it on your own, is to make sure that you’re safe and well informed before starting anything. Knowledge is power and when you’re doing it yourself, it’s easy to get a little bit relaxed on the rules but keeping yourself, your neighbours and anyone else involved in the project safe is the number one priority.

If you are looking for professionals to help with your extension needs, why not take a look at Habattach? We us pre-fabricated building methods to install highly insulated spaces onto your home, giving you that much needed space. If you’d like to find out more about how HAB can help you, send us an email to hello@habattach.com and one of the team will be in contact.

Exterior Example - 6m x 4m Hab 2 Prefab Extension
Hab 2 Interior Example - Living Room Prefab Extension

We can install our prefab extensions anywhere the UK including London, Oakham, Manchester, Northampton, Leicester, Coventry, Cambridge, Bedford, Lincoln, Birmingham and more.