Stormwater engineering Sydney
Stormwater engineers Sydney: drainage, easements, flood risk
Helping protect structures and reduce flooding risk with precision and compliance.
In brief
- We design stormwater drainage, easement drainage for low-lying properties and flood impact assessments for development applications across Sydney.
- Our drainage designs follow the Australian Rainfall and Runoff guidelines and the requirements of the local council.
- Clients include architects, builders, developers and building managers on residential, commercial and industrial sites.
Why professionals choose us for stormwater engineering in Sydney
Efficient, compliant water management is the core of what we do. Architects, builders, property developers and building managers turn to us for practical, site-specific stormwater solutions.
Our expertise includes easement design for low-lying properties, so stormwater can drain properly and the design meets council regulations. All drainage design aligns with the Australian Rainfall and Runoff guidelines. In flood-prone areas, our flood impact assessments give the detail councils ask for and help protect the property from damage. When a matter reaches a planning or legal dispute, we provide expert witness evidence.
Diverse solutions
- Roofwater drainage and downpipe networks: gutters, sumps, terrace drains, rainwater heads and balcony outlets.
- Sustainable measures such as rain gardens and ponds that reduce runoff and encourage infiltration.
- Rainwater tanks and storage for reuse, plus subsoil drainage and pump systems for the hardest sites, without compromising structural integrity.
Focused on results
- A proven record in stormwater engineering for Sydney's construction and development sectors.
- Technical depth, a focus on compliance and a commitment to cost-effective, practical designs tailored to the project.
We also act as an expert witness in NCAT matters and appear in the Land and Environment Court of New South Wales.
Recent work includes stormwater plan reviews and drainage advice across multiple sites for Allworks Plumbing, and modifications to an existing stormwater system with council-compliant drawings for a private owner.
Our difference
Experienced
Two decades of stormwater engineering experience, led by our CEO.
Responsive
We communicate promptly, clearly and efficiently.
Cost effective
We respect your client's budget, so we prioritise practical designs.
Client reviews
★★★★★
Mus and the team at SYD Engineers are the best engineers we've worked with in over 15 years in business. They're highly knowledgeable and incredibly easy to collaborate with. They reviewed several stormwater plans across our projects, provided practical solutions to complex issues, and ultimately helped us save money on installations. They were also very responsive to issues on site, quickly providing advice that helped us resolve problems and minimise downtime. What really stood out was their approach: they didn't over-engineer designs for convenience. Instead, they took the time to find the most cost-effective and efficient solutions. Highly recommend!
★★★★★
Mustapha and his team helped me with modifications of my existing stormwater system. He and his team is very knowledgeable and professional. The cost of service was highly competitive and the drawings were professionally produced with great detail as per required compliance. I would recommend Mustapha for all types of hydraulic engineering jobs.
Questions we are asked about stormwater engineering
Do I need a stormwater plan for my development application, and what will council ask for?
Usually, yes. Most Sydney councils require a stormwater concept or drainage design as part of a DA, and the exact requirement is set by the council for your site. We prepare drainage designs in line with the Australian Rainfall and Runoff guidelines and the council's engineering specification. Where a site is low-lying and cannot drain to the street, we design the easement as well. Send us your architectural plans and any council correspondence and we will confirm what your council will ask for.
What is easement design for a low-lying property, and when do I need one?
When a property sits below the level of the street, stormwater cannot drain to the kerb by gravity, so it has to be piped through a neighbouring property to a lower outlet. An inter-allotment drainage easement is the legal and physical path for that pipe. You need one when the council will not accept a charged line or an on-site absorption system for your site. We design the easement drainage, prepare the plans the council and your neighbour need, and coordinate with your surveyor and solicitor on the easement documents.
What is a flood impact assessment and when does a Sydney council require one?
A flood impact assessment shows how a proposed development affects flood behaviour on the site and its neighbours, and how the building will perform in a flood. Councils require one when a site is mapped as flood-prone, when a council flood study identifies flood risk, or when a Section 10.7 certificate flags flood controls. The assessment sets floor levels, checks flow paths and storage, and gives the council the evidence to approve the design.
Our stormwater engineering team is here to help
Contact Mustapha and the team. You deal directly with the engineer responsible for your design.