Our contract states build time is 33 weeks, started 2nd week of Feb. If they take more than 33 weeks, see 1.11 section of your building contract where they have mentioned details about it.
Thanks Venky, for the start date did you go with the date when they said they will commence building or did they tell you it was officially second week of February, as in our case we were told they will commence most of the pre work for the slab b4 Christmas and then the site supervisor contacted me on the first week of the jan but when i inquired they said the commencement date was third week of January so not sure how to tell your official start date..
I would suggest to send email to builder office, i got the a written confirmation that my construction started on 21 Nov. Which i believe is correct. Else there isn't any significance of 33 weeks per contract.