Which takes precedence? I've looked at a block with an old house where DBYD shows there's a 225mm sewer line from the adjoining building cutting across the back (no biggie as it won't affect anything in the future and I will be developing to the max anyway). The property on the left side is a house (no 9) with a granny flat and a sewer connection shown (on DBYD). Nothing ringing bells yet...... DYBD is below, all nice. I picked up a sewer diagram today (below) but it shows that the adjoining house's sewer connects midway into this block's sewer service. No work has been done to either house (other than the GF) in over 30 years. The sewer diagram hasn't been updated to remove the outback toilets etc. The plan shows that next door's granny flat has its own sewer connection. Do I 'Oops' with a backhoe & cut it off at the boundary when I excavate for our footings? Will it be my problem or do I need to rely on both the DBYD & the sewer diagram for specifics? What are my rights in this case? There is no S88B creating an easement for the sewer (but as it is old is there existing use rights). Is it a case of this sewer doesn't need an easement? If I do bite the bullet and accept responsibility, I have to install a new sewerline in any case, should I build it next to the fenceline, create the S88B etc?