We have a 2000L rainwater tank planned, and currently the OSD Basin 1 is proposed to be above ground in the backyard with surrounding walls (NSW Cumberland council property).
I’m trying to understand the practical benefits of above-ground OSD vs underground OSD.
Also, if we proceed with the above-ground option now, would it restrict us in the future if we want to:
- Build a granny flat
- Install synthetic grass
- Add a deck or paved entertaining area
Has anyone gone through this decision and can share pros/cons, especially around future flexibility and council approvals?
Can we combine RWT with OSD? Would that be a good option?
Appreciate any advice or experiences. Attached is plan.
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