Council — Hunters Hill Council
Development — Residential, New Dwelling
Services — Stormwater management plan · On-Site Detention (OSD) · Stormwater Diversions & Easements · Water Sensitive Urban Design · Driveway & Access Design · Hydrology Assessment
Year — 2026
Outcome — Approved
Background
The owner planned to build a new house on the peninsula of Hunters Hill, including changes to the driveway access.
The problem
The site falls away from the street, so stormwater would normally drain through the downstream neighbour's land. The neighbour refused to grant a drainage easement. With the kerb higher than the front of the lot, there was no easy way to drain to the street by gravity. On top of that, the existing crossover grades didn't meet Australian Standards.
Our solution
We designed a custom pit raised above street level and a pump system to lift stormwater from the on-site detention up to the pit. We added a rainwater tank so the design met council's water sensitive urban design requirements, which also gives the owner water to reuse around the house.
For the driveway, we reviewed the vertical clearances along the existing profile and provided an alternative design that meets the prescribed grades, so cars won't scrape on the way in or out.
Was it approved? yes.
On-Site Detention Detail
Driveway Long-section