Most builders focus on building new homes, so renovating is a part-time activity for them. This matters because the processes and services required for renovations are quite specific. Once plans are signed off, building a new home is relatively predictable. Materials can be ordered well in advance and sub trades get easy access and well scheduled periods to work on site. Renovations are the complete opposite, so you need to select a renovation company that is set up to do a good job and be cost effective. Renovations require all the sub trades that new build does, but you need to work much more closely with them. That's why you need to choose a company with a tight knit team of sub trades to help quote and then carry out the work. During the project you and your renovation company will need to be very flexible to respond to unexpected issues that arise.