How to Plan for a Home Extension

An extension is one of the most effective ways of adding value to your property. Not only this, but it is a great low-cost alternative to moving house for growing families in need of more space. Rather than taking on the cost, time and stress of moving, an extension can provide the added floor space needed to accommodate your needs at a fraction of the price. With the right help on board, planning and building an extension can be a relatively quick and easy process. Here are some tips for planning an extension to your home.


The cost of your extension will depend on the size and type that you are going for. In general, a single storey extension in Australia costs between $1,350 to $2,100 per square metre. The costs will fluctuate depending on the materials you use for the build as well as the complexity of the design, with higher spec finishes sitting at the higher end of the scale. Smaller extensions of less than 20 metres tend to have a higher cost per square metre, whilst certain elements such as bi-fold doors will significantly add to the cost. You will also need to have your land assessed to establish whether it is suitable to build upon – costly complications may come in the form of uneven ground, tree roots or unfavourable ground conditions like clay. It is likely that half of your costs will go on the build and the other half on your interiors, such as flooring. Remember that is it always possible to upgrade your interiors later down the line, so if your budget is limited, you should invest more heavily in the construction to begin with.

Planning and Permissions

When it comes to gaining permission for your extension, you will first need to create plans to present to your local authority. For Sydney’s best house renovations, there are companies available who can help all the way through from the design process to the construction. Whether you are building a single storey extension or an entirely new floor, full architectural plans will be needed in order to gain the relevant planning permissions. There are a number of factors you will need to take into consideration to ensure that your plans are approved. These include complying with building regulations, such as ensuring that your extension doesn’t overshadow your neighbours or impair the vision of motorists in the area. You will also need to ensure that the proposed materials are in line with the local surroundings and your existing build. Generally, you will not be permitted to build an extension higher than your existing house, so you should bear this in mind when making plans.


Once you have all of your permissions in place, it’s time to start the construction phase. By opting for a company who can help all the way through from the design to the build, you can ensure the process runs smoothly from start to finish.

An extension is a great way to enhance your home and increase its value, so if you’re in need of more space, consider extending rather than moving as a cheaper and easier alternative.