When you pay for the survey you are ordering the product.
When you get the full survey quote back you have 30 days to withdraw from the contract, or you can post and the order goes ahead.
Properties passed sounds like they count the properties the fibre passes, but they don't.
They usually count the number of properties that share a copper distribution point (DP).
In some urban areas the newly installed fibre can pass dozens, if not hundreds of properties. Only those who share the final DP count as properties passed.
I'd guess there are 3 other properties on your DP.
The DP may be underground or on a telegraph pole.
I'm not 100% sure how it would work if you choose not to go ahead after ordering a survey but decide to advance at a later date.
It may be that ordering again automatically triggers another survey. I'm sure someone else can comment on that last point.
Edited by j0hn83 (Mon 07-Jan-19 00:13:32)