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OSD Construction

Discussion in 'Development' started by gach2, 15th Oct, 2016.

  1. gach2

    gach2 Well-Known Member

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    Location:
    sydney
    Does anyone here have a recommendation of a buillder that specialised in building osd tanks? or can any builder build it. 2 of the builders i have spoke to and looking at engaging to build the house prefer they dont get involved with the osd construction side

    site is in western sydney
     
  2. bob shovel

    bob shovel Well-Known Member

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    Need a Plumbing or civil construction company.assuming you have plans already
    What tickets do you need for these things? Always questions being asked. I might need to set up a back yard operation ;)
    Plumbers and /or drain layers ticket? Or nothing
     
  3. gach2

    gach2 Well-Known Member

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    Location:
    sydney
    Do have plans but not really happy with them, was considering the use of modular systems and have a plan designed that is cost effective.

    On another note has anyone ever been able remove a OSD requirement from an approved DA ? Mines a dual occupancy

    Having a look from council requirements

    My lot is only 2 houses away from the requirement for OSD for stormwater
    Council allows exemptions where the addition of dwelling is <100m2 (mine is 145m2).
    Council will consider exemption based on site coverage - mine is approx 30% (250m2/790m2) - lot of newer single dwellings are of this site coverage

    Wondering if anyone would recommend fighting to have OSD requirements waived from the DA through a seection 96?
     
  4. Scott No Mates

    Scott No Mates Well-Known Member

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    Get creative with the design and meeting basix. Use the osd for flushing toilets or greywater system, a bladder or rigid rainwater tank installed and pump system. It's not the end of the world - build smart from day one (@bob shovel - suggestions)?
     
  5. bob shovel

    bob shovel Well-Known Member

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    Being 2 houses away you may fall into the "grey area" where you may be able to get around it, but you'll need to give them something else like meeting the site coverage or more rain water tanks for grey water with calcs to back it all (??)
    But it does depend on the council and what they've allowed in the past, check online what other DA's have done. Most council's now have good online DA websites.
     
  6. TML

    TML Well-Known Member

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    4th Aug, 2015
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    Location:
    Sydney
    To capture rain water ....

    1. Above ground rain tank (cheaper option)- this is generally for the roof area

    2. OSD (i.e underground concrete tank, absorption area, etc) - this is generally for all hard surfaces such as driveways.

    Is your land sloping forward to the road or sloping to the backyard?

    As you are building a dual occupancy, you are taken away the grass area which generally used to absorb rain water. To prevent flooding your neighbor or the main road (if sloping forward) there is a need to retain water and let it out at a slower rate. This rate is defined by council and your hydraulic engineer will work it out for you.

    My plumber which i use say hydraulic engineer don't usually get things right and dont gets the designs practical and my plumber usually points issues back to the hydraulic engineer to amending.
     
  7. g-dub

    g-dub Active Member

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    Location:
    Coalfields
    Do you need the OSD designed for the site or has that been done and you only need construction input? I wouldn't think many builders specialise in this as it's not a particularly specialised piece of construction (unless you're looking at something of the scale of a detention basin.).
     
  8. Rockstar

    Rockstar Well-Known Member

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    1st Jul, 2015
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    Location:
    NSW
    Have you seen this thread?
    Onsite detention system