Water infrastructure and approvals,
expertly managed.
Water, wastewater and stormwater approvals, design and project coordination for builders, developers and property owners across NSW.
What our clients say
Feedback from builders, developers and property owners who’ve worked with Opal.
Based on 45 verified reviews on Google Business Profile
“I had a great experience with Opal Water Management. They did an excellent job and handled everything quickly and professionally.”
“The Opal team take great pride in their work which is demonstrated by the speed and quality of our Section 73 clearance.”
“Highly knowledgeable Water Service Coordinators. They resolved our Sydney Water out-of-scope asset query smoothly.”
“I had a great experience with Opal Water Management. They did an excellent job and handled everything quickly and professionally.”
“The Opal team take great pride in their work which is demonstrated by the speed and quality of our Section 73 clearance.”
“Highly knowledgeable Water Service Coordinators. They resolved our Sydney Water out-of-scope asset query smoothly.”
Submit Your Project Details
Connect with our team of accredited Water Service Coordinators to assess your site requirements, DA conditions, building plan clearance, or major works scope.
Combining Civil Heritage with Statutory Water Engineering
Opal Water Management operates as a specialized water infrastructure and statutory approvals consultancy alongside GHP Plumbing & Civil.
While GHP provides trade and civil execution, Opal Water Management delivers dedicated Water Service Coordinator (WSC) authority liaison, hydraulic engineering design, out-of-scope asset protection reviews, and statutory clearance management across Greater Sydney, Central Coast, and Regional NSW.
Accredited Water Service Coordinator & Major Works
Accredited Consultant & Section 50 Approvals
Civil & Stormwater Hydraulic Design Approvals
ISO 9001 Quality, ISO 14001 Environmental & ISO 45001 Safety Systems
Certified management systems
Opal Water Management's quality, environmental and occupational health & safety systems are certified by BSI to ISO 9001, ISO 14001 and ISO 45001.
Full-Scope Water Infrastructure Consultancy
Providing clear statutory pathways for residential subdivisions, high-rise commercial developments, industrial precincts, and civil infrastructure.
Building Plan Approvals
Lodge your proposed architectural plans for assessment, clarification and coordination of potential requirements relating to the impact of your build on the existing Water Authority infrastructure.
- • Building Over / Adjacent to Sewer Clearance
- • Rapid Sydney Water Tap-In System Logging
- • Out-of-Scope Review Resolution
- • Tap in system management
- • Complex approval coordination
Section 73 Compliance Certificates
End-to-end statutory management for land subdivisions, dual occupancies, and multi-dwelling developments requiring Sydney Water Notice of Requirements.
- • Notice of Requirements Application
- • Developer Works Agreement Management
- • Final Clearance Certification Issuance
Sydney Water Major & Minor Works
Technical design and coordination for sewer main extensions, water main relocations, asset encasements, and infrastructure upgrades.
- • Sewer & Water Main Extension Management
- • Constructor tendering & supervision
- • Asset Handover & Pegging Compliance
Pressure Sewer Systems
Specialised servicing assessments, boundary unit design, and Sydney Water coordination for low-pressure sewer unit installations.
- • Sydney Water Pressure Sewer Compliance
- • On-Site Boundary Unit Placement Design
- • Property Transfer Assessments
Hydraulic Engineering & Stormwater Design
Detailed stormwater & hydraulic solutions utilising 50 years of trade experience combined with elite engineering to source functional cost effective installations across a wide range of project needs.
- • Sanitary & Trade Waste Hydraulic Design
- • Stormwater OSD & Council Design Submissions
- • Articulated Design to meet soil classification standards
Service Locating/CCTV Inspection
Detailed site assessment regardless of the project complexities. Utilising a vast array of resources to meet your project where needed.
- • Detailed protection, location & feasibility reports
- • CCTV pipe inspection, dilapidation reporting, junction identification
- • Underground pipe & utility locating
Hunter Water & Section 50
Section 50 Compliance Certificates and accredited water & sewer reticulation design for developments across Newcastle and the Hunter region.
- • Section 50 Compliance Certificate Lodgement
- • Accredited Water & Sewer Reticulation Design
- • Underground Sewer Location & Asset Protection
Out of Scope Works
Assessment, management and engineering report coordination for non-standard Sydney Water sites that fall outside standard approval scope.
- • Out of Scope Referral Assessment
- • Geotechnical & Structural Report Coordination
- • Sydney Water Asset Protection Liaison
LGA / Council Stormwater
Stormwater detention (OSD) and on-site stormwater management design prepared and submitted to satisfy Local Government Authority conditions across NSW.
- • On-Site Stormwater Detention (OSD) Design
- • Stormwater management plans
- • Local Government Authority Compliance
A Structured Approach to Statutory Compliance
Our proven 3-step consultancy process ensures your project moves efficiently from initial site assessment through to final authority clearance.
Application & Assessment
We review your architectural plans and council and water authority requirements against relevant GIS records and mapping. We assess the potential impact of your proposed project on the position and function of existing assets, focusing on protecting the infrastructure and its capacity.
Site Analysis & Design
Our experienced coordinators arrange the site assessment required for your property. We identify applicable requirements and establish site and construction conditions, then coordinate the design and/or approval process needed before construction can begin.
Project Management & Completion
Where required, field coordination and verification of compliant construction support satisfactory project completion. Our experienced site team assesses and supports onsite works in collaboration with the coordinators managing the project’s approval requirements.
Water Infrastructure & Approvals In Action
A representative sample of statutory water clearance, hydraulic engineering, and pressure sewer coordination across NSW.
Council Design & Hydraulic Project Management
Sydney Water & Local Council Coordination • Greater Sydney
CCTV Pipe Inspection & Underground Asset Locating
Asset Verification & Infrastructure Mapping • NSW Regional & Metro
Sydney Metropolitan & Regional New South Wales
Wetherill Park Office
350 Victoria Street, Wetherill Park NSW 2164
Dubbo Regional Office
Suite 2, 46 Wingewarra Street, Dubbo NSW 2830