Civil engineers surveying construction site Sydney
Sydney's Eastern Suburbs Engineering Specialists

Civil, Stormwater & Flood
Consulting Engineers
in Sydney's Eastern Suburbs

STIVIL Consulting Engineers delivers practical, buildable, and fully compliant civil engineering, stormwater management, and flood assessment solutions for developers, builders, and architects across Sydney — with deep expertise in the Eastern Suburbs, Surry Hills, Bondi, Randwick, and surrounding areas.

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40+
Years Combined Experience
Australia
Wide
Accredited Designer
800+
Projects Delivered
NER
Engineers Australia Registered
Accreditations
Chartered Professional Engineer CPEng badge
NER Registered Engineers Australia badge
Engineers Australia logo
NSW Government Fair Trading logo
NSW Building Professionals Board logo
Victorian Building Authority Registered Building Practitioner
PMI Project Management Professional PMP certification logo
RPEQ Board of Professional Engineers of Queensland logo
Our Leadership

Experienced Engineers You Can Trust

STIVIL is led by two senior engineers with decades of hands-on experience across international and Australian markets, ensuring every project benefits from seasoned technical and managerial oversight.

Joe Frazier, Principal Engineer and Co-founder of STIVIL Consulting Engineers Sydney

Joe Frazier

Principal – Civil & Construction

Joe brings over 40 years of construction and civil engineering experience gained across Europe and New Zealand. His deep understanding of buildable design and on-site realities ensures STIVIL's solutions are practical, cost-effective, and construction-ready from day one.

He works closely with builders, developers, and project managers to navigate complex site challenges and deliver civil designs that stand up to scrutiny — from DA lodgement through to construction completion.

Civil Engineering Construction Management Europe & NZ Experience 40+ Years
Hasan Rana, Chartered Principal Engineer and Co-founder of STIVIL Consulting Engineers Sydney

Hasan Rana

Principal – CPEng, NER | Stormwater & Flood

Hasan is a Chartered Professional Engineer (CPEng) registered with the National Engineering Register (NER) through Engineers Australia, with 25 years of experience across Asia, the Middle East, and Australia. He leads STIVIL's stormwater, flood modelling, and hydraulic design practice.

His experience navigating NSW council requirements — including City of Sydney, Randwick, Waverley, and Woollahra councils — makes him a trusted advisor for complex development applications in Sydney's Eastern Suburbs.

CPEng NER Registered Stormwater & Flood Asia, ME & Australia
S
Stormwater Solutions
Design & management of runoff, detention systems & drainage infrastructure
T
Topographical Design
Terrain modelling, contour planning & elevation mapping for flood resilience
I
Infrastructure Integration
Core utilities including water supply, sewerage, power & communications
V
Validation by Codes
Designs comply with engineering standards, regulations & local council codes
L
Logical Solutions
Reasoned, ethical & practical approaches to every engineering challenge
Client Testimonials

Trusted by Sydney Builders & Developers

We work hard to earn the trust of every client, from first enquiry through to project sign-off.

STIVIL handled the stormwater design and OSD system for our multi-unit development in Randwick. The team's knowledge of council requirements saved us significant time in the DA process. Highly recommended for any Eastern Suburbs development.
[Client Name]
[Developer, Randwick NSW]
The flood assessment report prepared by STIVIL for our Bondi Junction site was thorough, clearly written, and accepted by council first time. Their TUFLOW modelling capability gave us real confidence going into the DA.
[Client Name]
[Architect, Bondi Junction NSW]
We engaged STIVIL for civil and stormwater design on a commercial refurbishment in Surry Hills. Their responsiveness and practical approach made a real difference — they understood our construction programme and worked around our programme pressures.
[Client Name]
[Builder, Surry Hills NSW]
From the initial pre-DA flood advice through to the compliance certificate, STIVIL managed the whole process smoothly. Their understanding of Waverley Council requirements was evident from the first meeting. We'll definitely use them again.
[Client Name]
[Project Manager, Waverley NSW]
Engineering Services

Our Civil, Stormwater & Flood Engineering Services

Civil engineer reviewing construction drawings and plans

STIVIL Consulting Engineers delivers integrated civil, stormwater, and flood engineering design for residential, commercial, industrial, and infrastructure projects across Sydney and the Eastern Suburbs. We work directly with builders, developers, architects, town planners, and project managers to produce compliant, buildable designs that navigate NSW council and authority requirements — including the City of Sydney, Randwick, Waverley, and Woollahra councils.

✓
Nationally accredited Chartered Professional Engineers
✓
Expert in NSW stormwater & flood compliance requirements
✓
Full professional indemnity and public liability insurance
✓
Registered with NSW Fair Trading and Building Professionals Board
Civil engineering site inspection aerial view

Civil Engineering Design

Comprehensive civil design for residential, commercial, and industrial developments across Sydney, using the latest Civil 3D software and technology.

  • Site assessments & feasibility studies (greenfield & brownfield)
  • Geometric road design, alignment & grading using Civil 3D
  • Driveway profiling & AS2890 compliance
  • Earthworks cut & fill design
  • Public domain, pedestrian pathway & cycleway design
  • Utility coordination & infrastructure planning
  • TFNSW & other regulatory compliance
  • Certification of engineering works
Stormwater engineering design blueprints and hard hat

Stormwater Management

Solution-driven stormwater design for all development types, from DA documentation through to construction certification, fully compliant with NSW standards.

  • Stormwater drainage design for all development types
  • DA, CC, CDC & SSDA stage documentation
  • Hydraulic & hydrologic assessments & design
  • On-site detention (OSD) system analysis & design
  • Water sensitive urban design (WSUD) & council compliance
  • DRAINS & MUSIC computer modelling
  • Integrated water management reports
  • S68 application & approval support
Flood engineers reviewing design plans on site

Flood Assessment & Mitigation

Expert flood engineering for Sydney developments, from initial pre-DA flood advice through to TUFLOW modelling and flood compliance certificates for council submission.

  • Initial pre-DA flood assessment & advice
  • Overland flow path assessment
  • TUFLOW pre & post development modelling
  • Flood risk management plans
  • Flood response assessment & mapping
  • Pre- & post-development flood profiling
  • Flood evacuation & emergency response plans
  • Flood compliance certificate & sign-off
Project management team coordination meeting

Project & Design Management

PMP-certified project management across all project phases, from concept to completion — helping Sydney clients keep projects compliant, on time, and within budget.

  • Liaison with regulatory authorities & councils
  • Preparation of council compliance documentation
  • Construction management plans
  • Sub-consultant selection & coordination
  • Sydney Water coordinator engagement
  • Costing reports for DA compliance
  • Stakeholder engagement & management
  • NBN design & connection documentation
Engineering inspection industrial facility Sydney

Inspection & Certification

Comprehensive inspection, assessment, and certification services for civil and stormwater components across Sydney construction and development projects.

  • Stormwater engineering certificates
  • Inspection & certification of pit & pipe drainage
  • Hydraulic compliance & assessment certifications
  • OSD & WSUD component compliance certifications
  • Works-as-executed plans review & certification
  • Subdivision road & drainage compliance certification
  • Stormwater management facility certification
  • Audit & design assessment with certifications
Engineer reviewing civil engineering drawings and calculations

Remedial Works & Drafting

Tailored remedial engineering and technical drafting services using Revit, AutoCAD, and Civil 3D — serving engineers, architects, contractors, and landscape consultants across Sydney.

  • Building condition assessments & dilapidation reports
  • Concrete spalling (concrete cancer) repair management
  • OSD & WSUD inspection & audit
  • Comprehensive drainage assessments
  • Engineering drafting – civil & stormwater (2D & 3D)
  • Stormwater management & erosion control plans
  • Expert witness & litigation-compliant reports
  • SEARs water management reports

Frequently Asked Questions

Do I need a stormwater report for my DA in Sydney's Eastern Suburbs?

Yes — most development applications in the Eastern Suburbs (including Randwick, Waverley, and Woollahra council areas) require a stormwater management plan and, for larger sites, an on-site detention (OSD) design. STIVIL can prepare all required stormwater documentation tailored to your council's specific requirements.

When is a flood assessment required for a Sydney development?

A flood impact assessment or flood report is commonly required when a site is identified as flood-affected, or near an overland flow path. City of Sydney, Randwick, and other Eastern Suburbs councils regularly request TUFLOW modelling reports as part of the DA process. Our team can advise from the pre-DA stage.

What is an OSD system and does my development need one?

An on-site detention (OSD) system manages stormwater runoff from new developments to ensure flows don't exceed pre-development levels. Most medium-to-large developments in the City of Sydney and Eastern Suburbs LGAs require an OSD system. STIVIL handles analysis, design, and council compliance documentation.

Can STIVIL handle both civil and stormwater design in one engagement?

Yes — this is one of STIVIL's key strengths. Our integrated approach means civil grading, drainage, and stormwater designs are coordinated from the outset, reducing RFIs, clashes, and council queries. We regularly act as the lead civil and stormwater consultant for residential and commercial projects across Sydney.

Our Work

Projects & Experience in Sydney's Eastern Suburbs

We have delivered civil, stormwater, and flood engineering across a wide range of residential, commercial, and mixed-use developments in Sydney and the Eastern Suburbs — helping clients achieve compliant, quality outcomes on time and within budget.

Civil engineering site inspection aerial view
Stormwater & Civil

[Multi-Unit Residential Development — Randwick]

Stormwater drainage design, OSD system analysis, and hydraulic assessment for a 12-unit residential development. Full DA compliance documentation prepared for Randwick City Council.

Randwick, Eastern Suburbs Sydney
Flood engineers reviewing design plans on site
Flood Engineering

[Flood Impact Assessment — Bondi Junction]

Pre- and post-development TUFLOW flood modelling and impact assessment for a mixed-use DA in Bondi Junction. Overland flow path analysis and flood risk management plan prepared for Waverley Council.

Bondi Junction, Eastern Suburbs Sydney
Stormwater engineering design blueprints and hard hat
Civil Engineering

[Commercial Fitout & Civil Upgrade — Surry Hills]

Civil design coordination including driveway profiling, AS2890 compliance, and public domain works for a commercial building upgrade in Surry Hills, in coordination with City of Sydney Council.

Surry Hills, Sydney NSW
Engineering design drawings and plans for Sydney development
Stormwater & WSUD

[WSUD & Stormwater Design — Paddington]

Water sensitive urban design (WSUD) and integrated water management report for a boutique residential development in Paddington. DRAINS modelling and MUSIC analysis prepared for Woollahra Council.

Paddington, Eastern Suburbs Sydney
Engineers walking on construction site Sydney Eastern Suburbs
Project Management

[Aged Care Facility — Maroubra]

Full project management and civil engineering design coordination for a new aged care facility in Maroubra. Managed DA compliance documentation, Sydney Water engagement, and sub-consultant coordination throughout design and construction phases.

Maroubra, Eastern Suburbs Sydney
Engineering inspection industrial facility Sydney
Flood & Stormwater

[Mixed-Use Development — Coogee]

Combined stormwater management and flood assessment for a mixed-use development in Coogee. Delivered pre-DA flood advice, OSD design, and full hydraulic compliance documentation for Randwick City Council approval.

Coogee, Eastern Suburbs Sydney
Get In Touch

Contact STIVIL Consulting Engineers

Ready to discuss your civil, stormwater, or flood engineering project in Sydney or the Eastern Suburbs? We aim to respond within one business day.

We aim to respond to all enquiries within one business day. All information is kept strictly confidential.