Its Openreach that provide the infrastructure, when there are sufficient orders from ISPs, like BT Retail, Sky, TalkTalk.
Once this happens, then the planning process can take place, which can take quite a long time.
If you are moving onto a new build, then you may have to wait for Openreach to provide the basic infrastructure for your phone connection, depending on whether the builders have provided ducting etc.
Is it not up to the developer to coronate with openreach for that kind of thing? i recently came across this http://www.openreach.co.uk/orpg/home/network/developingournetwork/documentationandinformation/builde... which seems to be the guide lines for new build property. of course maby the developers have contracted with a different suppler like a housing development here in carlisle which exculively uses solway communications for its phone/braudband
I'd stay well away till you know for definite there is going to be a fibre broadband infrastructure in place. Far too many of these new build estates have been suffering the same problem with poor ADSL broadband.
If having an Infinity connection is important to you, then it's something you need to look out for before paying a deposit on anywhere.
It does seem that having good internet speeds is something people are looking out for when choosing their next home
The provision of fibre connections should be made a condition of granting planning permission, just like water and electricity.
What county are you in ?