DDEG’s hydraulic engineering consultants deliver performance-based solutions for safe, compliant water management in every building.
We specialise in providing engineered solutions to assess and enhance the drainage performance of roofs, balconies and terraces. Our hydraulic services enable water to move in, out and away from buildings, safeguarding performance and protecting long-term value.
We create tailored solutions when your project doesn’t fit standard code provisions.
Our hydraulic expertise ensures all plumbing and drainage systems achieve compliance while supporting your design goals. We’re highly experienced with challenging heritage and refurbishment projects.
We identify project risks through detailed analysis.
We consider your project’s entire lifecycle and spot hidden risks that others might miss. This gives you clarity and peace of mind from concept to completion.
We advise clients on sustainable water re-use strategies to help reduce environmental impact and improve resource efficiency.
Our expertise includes the analysis, design and optimisation of rainwater harvesting and recycled water systems to achieve practical outcomes. Through advanced modelling and data analysis, we support clients in achieving long-term water sustainability goals.
We provide independent technical reviews that identify compliance risks early and give expert assessment of hydraulic designs.
Our reviews ensure projects can move forward with confidence that the designs will be compliant and buildable.
We deliver practical engineering advice, innovative designs and precise calculations. Our detailed analysis and creative thinking provide robust documentation for your project needs.
We carry out independent site inspections for buildings under construction or after they are built.
Our engineers visit the site to assess real issues, check system installation and provide clear, practical solutions to problems as they arise.
We develop compliant and practical stormwater and roof drainage solutions for every project. This covers:
Our teams help you prevent water damage, achieve smooth compliance and extend the life of all building types.
Our engineers provide smart designs for removing wastewater safely from buildings. We cover:
We provide design and documentation for efficient, safe water systems for all buildings. This includes:
Our solutions suit both new buildings and upgrades for heritage or complex sites.
Well-designed stormwater and roof drainage systems protect against flooding and costly repair work.
Early expert advice ensures all plumbing and drainage systems meet code and regulatory standards.
Performance-based approaches allow creative architecture without compromising on water management or compliance.
Hydraulic engineering support minimises risk and enables smooth project approvals.
Robust hydraulic systems contribute to the longevity and value of any building.
Our track record spans commercial, residential, education and heritage projects, supporting projects with proven hydraulic strategies.
Fast, practical advice and clear communication mean issues are resolved early and projects progress with confidence.
As an Australian-owned firm working across the country, we offer deep insight into local regulations and best practices, ensuring compliance in any jurisdiction.
Seamless collaboration with our in-house fire, facade, access and ESD teams delivers coordinated, compliant outcomes for the most challenging sites.
Our team’s detailed technical understanding allows us to develop fit-for-purpose hydraulic strategies, whether it’s for performance-based requirements or standard code compliance.
3,000+
Successful
Projects
5+
Years in
operation
25+
Professional
employees
7+
Locations in
Australia
Collaboration
We partner with architects, building surveyors and construction teams to ensure compliance without sacrificing creativity.
Innovation
Our team develops unique pathways to compliance using advanced hydraulic engineering and out-of-the-box thinking.
Service
We prioritise your deadlines, providing prompt, reliable advice and clear communication at every stage.
Expertise
With specialist knowledge across all building disciplines, we deliver tailored solutions for projects of any scale.
Here’s how we work together to achieve compliance while maintaining your design integrity and vision.
Tell us about your overall goals and hydraulic compliance challenges.
Receive a fast, tailored and transparent proposal.
We analyse your project’s background so we can deliver a precise, effective solution.
We outline a performance-based pathway tailored to your needs.
All key parties are engaged early for alignment and smooth approvals.
Our consultants handle all modelling, calculations and documentation for you.
Receive a robust, regulator-ready report for building approval.
We’ll submit the final documentation to the authorities, ensuring approvals without any last-minute surprises.
We provide a seamless handover, ongoing support and maintenance to ensure long-term compliance and performance.
Our experienced leaders are qualified and experienced engineers and building consultants. They are closely involved in every project, providing guidance and oversight to ensure we exceed your expectations. Their hands-on approach ensures that you benefit from their expertise at every step.
Members of our team are accredited by these organisations.
DDEG is proudly ISO certified.
Architects, building designers, engineers, plumbers and project managers: to unlock compliance pathways and preserve design intent.
Building surveyors and certifiers: to provide robust technical justifications and streamline approvals.
Developers and property owners: to resolve compliance challenges and protect long-term asset value.
Government bodies and councils: to ensure public projects meet the highest standards.
Retailers and commercial property managers: to ensure safety and amenity through innovative design.
| Client | Industry Cladding and Roofing |
| Sector | Residential |
| Location | Southbank, Victoria |
| Discipline | Building solutions Hydraulic engineering |
| Services | Performance solutions Roof drainage design |
DDEG delivered bespoke hydraulic performance solution for the canopy roof of the development, overcoming unique compliance challenges.
Our work preserved the building’s design while ensuring the roof drainage system achieved compliance for effective rainwater management.
Hydraulic engineering focuses on the flow, control, supply, and removal of water and other fluids within buildings and infrastructure. It covers the design, analysis, and management of systems for water supply, wastewater and roof stormwater drainage, ensuring safe, efficient, and sustainable water movement through our built environment.
A hydraulic engineer designs, analyses, and reviews systems that manage water and waste flows in buildings and infrastructure. This includes developing solutions for water supply, sanitary plumbing and roof stormwater management.
Hydraulic engineers deliver tailored, compliant designs and performance solutions to prevent water-related damage, improve operational efficiency, and support safe, reliable outcomes for architects, builders, owners and facility managers.
Hydraulic plumbing and drainage refer to systems that move water in and around the built environment. This includes:
A hydraulic consultant or engineer provides advice on hydraulic plumbing and drainage systems. Specialist hydraulic engineers provide performance-based solutions, helping you achieve compliance, preserve your design vision and avoid costly delays.
The earlier, the better. Involving the hydraulic expert at the concept or schematic design stage helps identify compliance pathways, avoid costly redesigns, and unlock innovative solutions that align with your vision and regulatory requirements.
Yes. While your other consultants may have overall design responsibility for the project’s plumbing and drainage systems, DDEG can provide specialist solutions to address specific challenges of your project.
Performance-based solutions use advanced analysis and modelling to demonstrate that your building meets the National Construction Code’s performance requirements, even when prescriptive rules don’t fit or are overly onerous.
We can assess and provide hydraulic performance solutions for roof drainage, sanitary drainage and water supply systems.
Yes. Our deep understanding of hydraulic systems means we can provide reliable and informed advice on prescriptive design solutions.
Yes. We provide a range of bespoke solutions to assist in the conservation, restoration and enhancement of heritage buildings and structures.
Our team has extensive knowledge of local and national codes, and we maintain strong relationships with building surveyors and other authorities. We prepare robust, regulator-ready documentation and proactively engage all stakeholders to ensure smooth approvals.
Our fees are very competitive and tailored to the complexity and requirements of your project. We provide clear, upfront proposals with no hidden costs, and we’re always happy to discuss options to suit your budget and timeline.
We typically require your architectural drawings, a project brief, and any known compliance challenges. Don’t worry if you’re unsure. Our team will guide you through exactly what’s needed for an efficient, accurate proposal.
We aim to provide tailored proposals within 2-3 business days of receiving your project details, so you can keep moving forward.
We provide hydraulic solutions across most sectors Australia-wide, including:
Yes, DDEG is registered to practice Australia-wide and holds full professional indemnity insurance for all hydraulic solutions. Please contact us to request a certificate of currency.
Yes. We’re with you from initial concept through to final approval and beyond. We offer ongoing advice and support through construction and occupancy to ensure your building remains compliant and safe.
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