I am building a new house, on a block that does not have a phone line connected, as it is a subdivision. The builder is getting the house "NBN Ready" whatever that means, but I need to organise a lead in connection. Can Optus do these works?
Ask your builder if all connections to your new house need to be underground (Electricity, internet, etc.)
I think this is the new code requirement. If so your builder should lay conduits for these connections from the street to your house.
When you want to order the NBN whoever you choose will arange for the connection from the street to your conduit.
Check the NBN Site for what technology your area will use for the NBN