How to Design a Seamless Home Extension

How to Design a Seamless Home Extension
September 27, 2016 Total Lifestyle Builders

There are many factors to consider when planning for a house extension. You’ll need to decide where you want to extend and what type of extension you want. Not to mention all the other building and design specifics.


However, one of the most important aspects of an extension is how to make it look like part of the original house. There’s nothing worse than seeing an old house with a brand new bit stuck on the side.

But why does it matter so much? It’s simple — curb appeal. It’s human nature to be more inclined to prefer complete and neat over messy and unfinished. This will not only impact how your house looks but will also impact the value of it. If in the future you wish to sell your property, it will be worth a lot more if the extension is seamless both on the inside and out.

So let’s take a look at what can be done to make an extension look like part of the original house.

Roof pitch

This is a simple design factor that can add great symmetry to the overall project. For example, if you are going to add a granny flat — a separate dwelling altogether — the ability to mimic the roof design will make the extended area look like it is part of the original house. This goes for both side and second story extensions as well.


A sense of flowing style through the two areas is essential when adding an extension. For example, if you’ve got a beautiful Queenslander, a modern extension or granny flat will turn into an eyesore.


Making two dwellings seem like one can be as simple as using similar colours throughout the materials. For example, if you have a coloured render on the original house, this render should be matched with the extension. However, the biggest patch of colour you’ll need to match is the roof colour. It’s one of the first things people see when they look at the house so if you’ve got two areas with different coloured roofs then it’s going to stand out. Quite simply, if the roof colours match, you’ll be well on your way to making the two builds look like one.


The material of the build is probably the most important aspect to get right. However, for some materials, this may be a little bit of a struggle. Take brick, for example; brick comes in a variety of styles and colours and can be incredibly hard to get types that match the original build. However, both wood and stone are easy to match as wood can be painted and stone has a variety of natural aspects making changes in colour more easy on the eye.

Tidy up the existing house

After making sure all of the above aspects match, there may still be some inconsistencies between the extension and the original build. That’s where, after you’ve tried your best to match everything that you can look at tidying up the original house. This should not be too much of a hassle if the planning has been done correctly. A simple touch of new paint could be all it needs to make the difference.

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