⚡ Quick Answer: RI ENG PTY LTD is a local stormwater design engineer covering all Greater Sydney councils. We deliver hydraulic designs, stormwater drainage plans and OSD reports within 2–5 business days — fast enough to keep your project on schedule.
Planning a new home, duplex or granny flat and need a stormwater engineer close by? Getting the right engineer quickly matters — drainage design holds up builder quotes, certifier approvals and council submissions.
What a Local Stormwater Design Engineer Does for Your Project
A stormwater design engineer does far more than draw a few pipes on a plan. The engineer analyses your specific site — its slope, soil type, impervious areas and connection to the street drainage network — and builds a drainage system that handles the design storm without creating problems for your slab, your neighbours or the council infrastructure.
At RI ENG PTY LTD, every residential stormwater design includes hydraulic calculations, pipe sizing, pit locations, overflow paths and a compliant drainage layout drawn to Australian Standard AS/NZS 3500.3. The package your certifier receives is complete — no missing documents, no revision requests.
Local knowledge matters here. Each Sydney council has its own drainage specifications layered on top of the Australian Standard. Canterbury-Bankstown, Inner West, Georges River, Bayside and Sutherland all have requirements that differ in detail. We know what each council looks for because we submit to them regularly.
Why ‘Near Me’ Matters for Stormwater Engineering
Engineering is not all done on a screen. A stormwater design engineer near you is familiar with the local topography, the council’s preferred drainage connection points and how the street stormwater network behaves in your area.
That local familiarity translates directly into faster designs and fewer council revision requests. We already know the downstream drainage constraints for most Sydney LGAs before we start your plan.
RI ENG PTY LTD is based in Burwood, Sydney — central to the LGAs where most of our residential work sits. We cover the full Greater Sydney region and can discuss your project by phone, email or at our Burwood office.
Our team works on houses, townhouses, duplexes, attached dwellings, secondary dwellings and granny flats. If your project type involves drainage, we handle it.
What’s Included in a Stormwater Drainage Design
Every design we produce covers the same core components, sized and laid out for your specific site:
Hydraulic calculations — storm intensity, flow rates and pipe capacity calculations using the rational method (Q = CIA) to AS/NZS 3500.3.
Drainage layout plan — scaled drawing showing pipe routes, pit positions, grades, invert levels and connection to the existing stormwater network.
OSD design (where required) — if your council requires an on-site detention system, we design the storage volume, outlet configuration and overflow paths.
Supporting documentation — everything your certifier needs in one submission-ready package.
How Fast Can You Get a Stormwater Design?
Once you send us your site plan and survey, most residential stormwater designs are ready within 2–5 business days. Complex sites or those requiring OSD modelling may take slightly longer — we tell you upfront.
Send your site address and project type to riengineering2155@gmail.com or call 0451 452 932. We respond the same business day.
Frequently Asked Questions
How do I find a stormwater design engineer near me in Sydney?
Search for a licensed civil engineer who specialises in stormwater drainage and hydraulic design in your Sydney council area. RI ENG PTY LTD covers all Greater Sydney councils from their base in Burwood — call 0451 452 932 for a quick scope and fee.
What does a stormwater design engineer do?
A stormwater design engineer assesses your site conditions, calculates how much rainwater your land generates, designs a compliant drainage system (pipes, pits, overflows), and produces drawings and hydraulic calculations your certifier and builder can use directly.
How quickly can I get a stormwater design in Sydney?
RI ENG PTY LTD delivers most residential stormwater designs within 2–5 business days of receiving your site plan and survey.
Do I need a stormwater engineer for a granny flat?
Yes. Sydney councils require a site-specific stormwater drainage plan for granny flats, secondary dwellings and dual occupancies. The design must comply with AS/NZS 3500.3.
What areas does RI ENG PTY LTD cover for stormwater design?
RI ENG PTY LTD covers all Greater Sydney local government areas including Canterbury-Bankstown, Inner West, Georges River, Bayside, Sutherland, Blacktown, Parramatta, Cumberland, Hills District and Northern Beaches.
