Home Addition Projects and Ideas

Extension designs and ideas

Cape Cod design & build home extensions for many different house styles including Federation and Californian, and through to the latest architectural designs. And we are experts with semi-detached homes; having completed additions to hundreds of semis across Sydney.

Please click on a Category to view a selection of our completed Home Addition projects in the style of your choice.

Californian second storey house extension designs

Californian →

Federation second storey home addition designs

Federation →

Contemporary first floor home extension designs

Contemporary →

Semi-detached second storey house addition designs

Semi-Detached →

What does a house extension cost?

How much does it cost to extend your home? The galleries below feature second storey extensions in different price categories.
Please click on an image to view a selection of our completed home addition projects in the price range of your choice.

Cost of home extensions range 150k-350k

Projects 150k-350k →

First floor home extensions cost range 350k-550k

Projects 350k-550k →

House extensions cost range 550-750k

Projects 550k-750k →

Second storey extensions cost 750k and over

Projects 750k+ →

More on the cost of home additions

Determining a realistic cost to build a second story extension is not as simple as a “rate per square metre” formula because each extension is unique according to your individual requirements and the house itself. However, it could be as easy as arranging for your free, no-obligation visit from a specialist Cape Cod designer. Request here.

You can also see how renovation costs have changed over time by linking to our Home Extension and Renovation Cost index, www.hercindex.com.au/projects. The Index tracks 6 individual second storey extension projects and includes floor plans and other details.

Home Extension and Renovation Cost Index