Addbuild Additions are Sydney's leading designers and builders of home additions, renovations and extensions. We're members of the Master Builders Association (MBA NSW) and the Housing Industry Association (HIA) If you love where you live - your neighbours, the kids' schools and your local community - but you need more room, it makes sense to add to your existing house rather than move elsewhere. Addbuild Master Builders can you turn your house into your dream home. We're specialists in this type of work and have been providing these services since 1980. Our reputation is built on your home.