HI Guys
Hoping someone can assist here if they have had a similar problem or have the knowledge. Purchased a property in the mount druitt area to build a granny flat on the back . It slopes away from the road onto a parkland area. Due to the fact I took the guidance of the draftsman when asking if there was any issues and they said there wouldnt be, I went ahead with the purchase. I am now in the process of getting approval with council and it has stalled due to I believe the stormwater issue. THere is no easement out the back to connect stormwater too and I am wondering what the options would be from here. I have tried to do some research and came across what I believe to be some sort of drainage Pit. I know this is probably a stupid question although could the run off not be directed into the parklands as it shouldnt affect anyone else as there is no property behind mine? thanks in advance for any replies
Find out from the town planner working for council what the issue is – there is no point speculating and wasting energy. If it is indeed stormwater find out what your options are. Yes you may be able to build a herringbone drain/absorbtion pit but in Mt Druitt with the clay soils you will need a lot of space for them to work effectively in such poor soil. Alternatively you may have to go for an engineered solution ie a retention pit with a pump out system or get creative and harvest all of the stormwater in an above ground tank (use it for all toilet flushing, external hose cocks and whatever else you can think of).
You will probably not be able to drain directly onto the adjoining parkland.
Thanks a lot for the reply Scott. Much appreciated. The guy at council advised me to wait until he hears back from town planner before they make a decision it's the first time I have done this so a bit frustrating. Any idea how much one of those pits would cost ?? Thanks
Probably best to speak to a stormwater engineer as they specialise in this field. The 'pit' is a series of trenches in the shape of a fish skeleton ie one main trench with lots of little branches however on a suburban block there isn't the space for lots of spines.
Are you applying under the 'Affordable Rental Housing SEPP'? If so, you can simply install a 'dispersion pit' in the rear yard, These are not too expensive and the submitted Drainage Plan would show this detail. The SEPP legislation for granny flats allows, where a property slopes to the rear an no Drainage Easement exists, for the installation of a dispersion pit.
Have a look at this granny flat approval guide: http://www.grannyflatapprovals.com.au/approval-guide/
Cost calculator including dispersion pit: http://www.grannyflatapprovals.com.au/approval-pricing-interactive/
Cheers,
Brazen.
Brazen | Granny Flat Approvals Sydney
http://www.grannyflatapprovals.com.au
Email Me | Phone MeGranny Flat Approvals Guru
Council will rarely accept a stormwater design where runoff is discharged directly onto adjacent properties. As pointed out by Brazen, a dispertion pit would be an affordable solution.
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