Building Garage over Sewer line!

Hi everybody. Bought my first home July 2013, everything ok about my deceased estate home except it only has a garden shed instead of a garage. September 2014 just started to investigate costs for putting up a garage........Sewer line at back of property, 1.30 from boundary line. Rang up Dial before you dig. They state sewer line is 2700mm below ground level....only thing is my land isn't on the same level as the road next to it........where do they take the 2700mm measurement from? as this depth affects my "Zone of Influence".

So after speaking with council, a water service coordinator and an engineer, it appears I'm up for big dollars to sort this crap out and get my dream garage.

I believe the best order to approach this is as follows. Please respond with any tips or advice if I am wrong.

1. Consult Draftsman and get DA drawn up for garage. ( Quoted $ 200.00 ) ( do this before spending money on sewer peg outs and engineers, in case council rejects DA.)
2. Submit DA to Council ($200.00)
3. If Da approved, get sewer line pegged out, by approved person. ( Quoted $ 450.00 ) {does this include a depth measurement? as I don't believe the dial before you dig depth is right.)
4. Get engineer to design slab, taking into account zone of influence, incorporating concrete piers if required to below zone of influence. (I'm not looking forward to concrete encasing the sewer, and will try to avoid this at all costs)
5. Take completed engineer drawing to Sydney water or approved agent/Water service coordinator, to be stamped and approved.
6. Take all this to council to get Construction certificate
7. get contractor to dig footings and required pier holes. $??????
8. get engineer or water service person to inspect footings to makes sure they are up to engineer design.
9. Pour Piers and slab.
10. construct pre fab kit shed.
11. get council to sign off on the project.

Let me know if I have left anything out.

This is such @@@@@@@@.

Craig.


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