Our Services
Stormwater Engineering
Compliant stormwater drainage design and management for residential, commercial, and civil projects across Sydney and NSW.
Drainage Design That Protects Your Property
Effective stormwater management is critical to protecting buildings, infrastructure, and the surrounding environment from water damage. KYSU Engineers provides comprehensive stormwater drainage design services — from simple residential overland flow assessments to complex civil drainage networks for large-scale developments.
Our engineers work closely with councils, certifiers, and hydraulic consultants to deliver drainage designs that meet the requirements of the NSW Stormwater Management Service Charge, the Building Code of Australia, and relevant Australian Standards. Every design is tailored to the site's specific topography, catchment characteristics, and council requirements.
What We Provide
Drainage Design
Site-specific stormwater drainage design for residential and commercial developments, including pipe sizing, pit design, and overland flow paths.
Overland Flow Assessment
Analysis of overland flow paths and flood levels to ensure buildings and infrastructure are protected from stormwater inundation.
On-Site Detention (OSD)
Design of on-site detention systems to manage peak stormwater flows and satisfy council pre-development flow rate requirements.
Rainwater Harvesting
Design of rainwater tank systems and reuse infrastructure to meet BASIX commitments and reduce potable water demand.
Drainage Concept Reports
Preliminary drainage concept reports for DA submissions, demonstrating compliance with council stormwater management requirements.
Stormwater Management Plans
Comprehensive stormwater management plans for construction certificates, integrating erosion and sediment control with long-term drainage strategy.
Standards & Compliance
Our stormwater designs are prepared in accordance with the applicable NSW and Australian standards, council development control plans, and the Building Code of Australia. We liaise directly with council engineers and certifiers to resolve technical queries and ensure smooth approval.
Our Process
Site Assessment
We review the site survey, council requirements, and catchment characteristics to establish the design parameters.
Hydraulic Design
Our engineers prepare the drainage design, including pipe sizing, pit schedules, OSD calculations, and overland flow analysis.
Documentation
Detailed drainage plans, long sections, and a stormwater management report are prepared for DA or CC submission.
Approval Support
We respond to council and certifier queries, issue revised documentation as required, and support the project through to approval.
Get Your Stormwater Design Started
Contact KYSU Engineers to discuss your stormwater drainage requirements. We provide fast turnaround and competitive fees for projects across all Sydney metropolitan areas and regional NSW.