Welcome to the Executive Building Group the number one Duplex Home Builders in Sydney providing the collection homes the way we live today. Change your lifestyle and get freedom that you deserve. Live in one and get earned by other. We all know that life is full of compromises but choosing and building a house should not be any kind of compromise. You will never be regret by spending a single penny on your house with our services. Discover the wide range of home design with unbelievable and spacious floors. A duplex is a residential building that contains two homes one on one lot that share a common dividing wall or dividing floor up and down.