Taking cost as main consideration, subsale property require hefty renovation and upfront capital cost for legal, MOT fees etc, but you get to save progress interest billing for the next 3 years for new project. Aside from cost, other factors include location and accessibility to main road. One traffic light into another access road with new development coming up , few blocks of condo can lead up to future tracffic congestion. Matured neighbourhood allow you to assess carefully the surrounding area, your neighbour, parking condition left right front back , stray animals etc etc. These are the risk one have to take when you buy new project. Just my 2 cents sharing from personal experience. Not an easy decision a lot to think through