The cost of house extensions can be cheaper than the cost of moving to a larger home and may even add more value to your home than their initial cost. However, there are significant costs involved, some of which may be "budget busters" if not anticipated. This brief guide to the cost of house extensions will help you take everything into consideration and not overlook anything.
©Danny Broe Architect
Ask the Experts First
One of the quickest ways to get an accurate estimate of the cost of your house extension is to talk with the experts first. If you are going to be adding on a major extension, you might want to start by finding a building consultant
in your area and making use of their expertise. Many homeowners hesitate to do this because they mistakenly believe that consultants and building designers
only work on expensive, high-end projects, but many of them in fact specialise in residential projects and can actually help save you money.
Once you have a firm idea of the size of your extension and the details about the materials that will be used in its construction, it's time to start getting quotes from the tradespeople you will be using. Get quotes from local carpenters
, brick layers
and others who will be doing the major construction work first. Then get quotes from the other trade professionals you may need to help you, such as:
If, after you have considered these major expenditures, you are still within your budget, it's time to move on to some of the other costs of your house extension. If you are adding on a living room or bedroom, one of these will be your carpets
or other floor coverings. If you are adding on a bathroom, the cost of tiling
and all your bathroom fixtures need to be calculated. These can often cost more than the cost of the construction of a bathroom
, so don't leave anything out.
How to Stay Within Your Budget
You should give yourself a 10% buffer in the cost of your house extension, just to cover unexpected expenditures. If you are cutting it fine, don't just cross your fingers and hope for the best. Take a look at everything and see where you might be able to save some money without compromising on quality or appearance. The price of a new kitchen
, for example, can vary from $5000 to $15,000 or more, depending on inclusions. Do you need a new garage or will a stylish and inexpensive new carport
do the trick? These are just two ways you can shave thousands of dollars off the cost of home extensions and still be more than pleased with the results you get.
Finally, don't forget that you are going to need to pay for a building permit, insurance and other related costs. You may be able to save if you become an owner builder, but be aware of your responsibilities before you take this route. A good way to learn more about becoming an owner builder
is to read some of our articles on the subject here in Home Improvement Pages. And remember, you can get always get quotes from 3 local tradespeople by filling in our get quote form below.