Stormwater Concept Plans
Stormwater Concept Plans for DA & CDC Approvals
Stormwater management is one of the most scrutinised components of development assessment in NSW. Trinity Design & Planning prepares preliminary Stormwater Concept Plans for clients across Fairfield West, Fairfield, Wetherill Park, Smithfield, Liverpool, Bossley Park, Prairiewood, Greystanes and broader Western Sydney.
These plans form the early-stage drainage strategy that councils and certifiers use to verify feasibility before hydraulic engineers finalise the detailed design.
[Insert hero image: stormwater flow diagram]
What Is a Stormwater Concept Plan?
A Stormwater Concept Plan outlines the intended method for:
Collecting rainfall from roofs and hard surfaces
Conveying water through pipes and drains
Connecting to council drainage systems
Managing overland flow
Preventing discharge onto neighbouring properties
It ensures the development has a viable drainage path before approval.
Our Stormwater Concept Plans Include
Roof & Hardstand Catchment Areas
We show:
Roof drainage lines
Downpipe placement
Hardstand runoff patterns (driveways, paths, patios)
Proposed Stormwater Routing
A conceptual-level diagram showing:
Pipe runs
Grade direction
Collection points
Potential pit locations
[Insert diagram: roof + site drainage arrows]
Legal Point of Discharge (LPOD)
Where available, we identify the LPOD or advise that this will be confirmed during detailed hydraulic design.
Overland Flow Considerations
Important for sloped blocks, flood-prone areas or older suburbs like Fairfield, Smithfield and parts of Prairiewood.
On-Site Detention (OSD) Notes
Where council requires OSD, we include a statement identifying the need for engineering design at construction certificate stage.
Why Stormwater Concept Plans Matter
Without a valid drainage strategy:
DA/CDC may be rejected
construction feasibility may be questioned
additional engineering redesign may be required
flooding and runoff issues may arise
Our plans improve approval certainty and reduce future complications.
Start Your Stormwater Concept Plan
Clear early-stage drainage strategy for council confidence.
Contact us today via email or call 0401 779 749