The damo problem is well known on this development as they failed to fit a plastic damp proof membrane at ground level where the outside areas meet the walls
If anybody was around the site 2 years ago you would have seen, and I still have photographs, where Polaris were what we call tanking, digging trenches around the properties, hacking away the damp areas, and fitting the damp proof membrane, to a large number of properties
You really need to speak to your community presidents about this as it will be covered by the 10 year building guarntee and tis is work that PW did on properties at no cost to the owners