Perth Hydraulic Design Consultants

Hydraulic Plans That Pass Council Approval First Time

NCC and AS3500 compliant documentation for commercial, multi-res, and institutional projects. Designed by licensed plumbers. Built for real-world construction.

✓ Compliance built in from day one (NCC, BCA, AS3500, Water Corp)

✓ Zero RFIs on multiple recent projects

✓ Full scope: water, sewer, stormwater, gas, fire services

✓ Coordinated with your architect and MEP team

✓ Fast turnarounds available when you need them

✓ Clear pricing with no vague scopes

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★★★★★ 5.0 Google Rating | 20+ Years Experience

Trusted by Leading WA Builders and Architects

What Changes When Your Hydraulic Documentation Is Done Right

Approvals Without Setbacks

Your documentation arrives at council ready for assessment. No chasing revisions. No waiting on amended plans while your permit timeline slips. When drawings are prepared to meet NCC, AS3500, and local authority requirements from the start, the approval process becomes a formality, not a bottleneck.

Builds That Run Smoothly

Clear, coordinated plans mean fewer RFIs and no "we'll figure it out on site" moments. Your builder gets documentation they can actually follow. Systems are coordinated with structural, architectural, and MEP teams before they hit site, not after problems surface.

Projects That Stay on Schedule

Tight deadline? Documentation can be delivered in as little as 3 weeks (scope dependent). When hydraulic design keeps pace with your project stages, you avoid the delays that cascade through construction, handover, and occupancy.

Good on Paper Means Nothing If It Doesn't Work on Site

We've heard it from builders too many times: "The drawings looked fine until we tried to build from them." Hydraulic documentation that ignores real-world construction creates problems that ripple through the entire project.

❌ Plans that pass a desk review but fail on site because pipe runs don't fit, levels don't work, or services clash with structure

❌ Approval documentation that's missing key details, sending you back to council while your programme waits

❌ Designers who've never been on the tools, producing drawings that make sense in CAD but not in the ceiling space or under the slab

You don't just pay for bad documentation in fees. You pay in site delays, frustrated subbies, and the cost of making it work anyway.

The fix isn't complicated: documentation designed by people who understand construction, coordinated properly, and built for approval the first time.

Here's the process we use to make that happen.

The Approval-Ready Design Process

How we deliver hydraulic documentation that's built to pass assessment without the back-and-forth.

Step 1: Scope and Clarify
You send us your plans and project brief. We review everything, identify compliance requirements, and clarify scope upfront so there are no surprises later.
You do: Send plans, drawings, or a project description. We do: Review, clarify requirements, confirm scope and timeline.
What you get: A clear fee proposal with defined deliverables, inclusions, and realistic timeframes.
Timeline: 1 to 3 days (depending on project info provided)

Step 2: Design and Coordinate
We create your hydraulic documentation: water, sewer, stormwater, gas, fire services. Everything is coordinated with your architect, structural engineer, and MEP team before it leaves our office.
You do: Connect us with your consultant team and provide updated drawings as needed. We do: Design, calculate, coordinate, and document to NCC, AS3500, and local authority requirements.
What you get: Fully coordinated hydraulic drawings, calculations, schedules, and compliance notes ready for submission.
Timeline: 2 to 4 weeks (scope dependent)

Step 3: Deliver and Support
You receive construction-ready documentation. We stay engaged through approvals and construction, responding to RFIs and resolving queries quickly.
You do: Submit for approval and proceed to construction. We do: Provide responsive support, answer authority queries, and issue amendments if required.
What you get: Documentation that supports smooth approvals and a direct line to us when questions arise on site.
Timeline: Ongoing support through to project completion

What Builders, Architects, and Developers Say

Call us or request a quote today to find out how we can help!

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Hydraulic Design Specialists

Perth. Sydney. Brisbane. Melbourne.

Accreditation

OTG designs and delivers projects in line with the National Construction Code and adheres to key Australian Standards including:

AS 3500 series for plumbing, drainage, stormwater, and heated water services
AS 5601 for gas installations
AS 2118, AS 2419, AS 2441, and AS 2941 for fire safety systems

Our commitment to these standards ensures the highest levels of safety, efficiency, and regulatory compliance in every project we undertake.

Licensed Plumbing Contractor: PL8000

Gasfitting Permit: GF12399