We are in the process of doing a big reno, although it hasnt started due to... wait for it.... council permits!!!
Our draftsman cost around $6ooo to do all the drawings. We are going up out and back... so from around 11 squars to around 26 squares. We are knocking down walls so we need loads of steel.
Fortunately my brother is a builder so we are getting it cheaper due to favours and also my dh is an electrician so hes doing all that and some trade offs with work.
We are estimating it will cost around $170k... we have a buffer of $220k. And hopefully it will only take around 6 months.
I put in the permit application 3 weeks ago... hoping to get it back this coming week... apparently it shouldnt take too long!
Our surveyer is costing around $2000 plus any extra inspection.

I'll let you know how it all goes and the final costs. It works out better finacially for us to renovate than to move elsewhere....