Civil stormwater estimates.
Civil stormwater and drainage is one of the most consistently underestimated scopes in Australian construction. OSD systems, detention tanks, gross pollutant traps and civil drainage networks, estimated on a civil engineering foundation.
Council compliance built in, and civil stormwater combined with building hydraulics for a complete hydraulic package.
The full civil hydraulic scope.
Civil stormwater and drainage estimates require a different skill set from building hydraulics. OSD calculations, detention system sizing, civil drainage network design and gross pollutant trap specifications are not things a building services estimator prices every day.
SNZ brings a civil engineering foundation to every stormwater estimate: understanding council requirements, catchment calculations, pipe sizing methodology and the civil construction costs that a building services background does not cover.
Whether you need civil stormwater priced as part of a high-rise residential development, a commercial project or a standalone civil infrastructure scope, SNZ estimates the complete civil hydraulic package.
Civil stormwater is consistently underpriced on construction tenders. A civil engineering background means we know what it actually costs, not what it looks like on a plumbing rate schedule.
MVRC Redevelopment
Moonee Valley Racing Club · through Moonee Valley City Council · Victoria
The challenge
A major civil drainage scope for the Moonee Valley Racing Club through Moonee Valley City Council. A stormwater pipe network ranging from 300mm up to 1500mm RCP, with installation depths reaching 5.39 metres.
One of the most technically demanding civil stormwater scopes in the SNZ portfolio, and the kind of work a building services estimate cannot price correctly.
The SNZ approach
- ▸Every pipe size individually measured from the civil drawings
- ▸Every installation depth priced individually, not averaged across the network
- ▸Every pit and connection measured and priced
- ▸Council requirements built into the pricing
The outcome
- ✓Demonstrated SNZ's ability to estimate major civil drainage infrastructure at depth, not just building stormwater
- ✓See our Melbourne and Victoria credentials →
Every civil stormwater system and structure.
From a single OSD tank to a complete civil drainage network, SNZ prices the complete civil hydraulic scope.
Civil contractors to building developers.
Civil stormwater estimates are needed by a wide range of clients, from a civil contractor pricing a standalone drainage upgrade to a residential developer needing the full building and civil hydraulic package in one estimate.
Our civil engineering foundation means we speak the same language as civil engineers and civil contractors, understanding the design, the compliance requirements and the real cost of civil hydraulic installation.
What contractors say.
Verified Google reviews. 5.0 from 69 reviews.
We’ve been incredibly impressed with the responsiveness and professionalism of SNZ. Quick to respond, thorough in their work, and consistently reliable. Their attention to detail has made a real difference to our workflow. We see them as a valuable long-term partner.
Worth every penny. SNZ estimated a large commercial hydraulic, civil and fire package in SA on a tight timeline. Within 24 hours they had started on our quote. Their detailed estimate provided everything we needed to fill in the tender documents with ease.
Shoaib and the team went over and above to deliver in a tight timeframe. Everything was detailed and communication was 10/10. The breakdown was very thorough and transparent covering all aspects of the job. Will definitely be using SNZ on future projects.
Common questions.
What does a civil stormwater estimate include?
On-site detention, stormwater pipe networks, pits and connections, gross pollutant traps, subsoil drainage, rainwater harvesting and civil reinstatement including trenching, bedding and spoil.
Why does civil stormwater get underpriced?
Because it requires a different skill set from building hydraulics. OSD calculations, detention sizing, catchment calculations and pipe sizing methodology are not what a building services estimator prices every day.
Do you price pipes by depth?
Yes. Installation depth materially changes cost. On the MVRC Redevelopment we priced a network from 300mm to 1500mm RCP at depths up to 5.39 metres, with every depth priced individually rather than averaged.
Can you combine civil stormwater with the building hydraulics?
Yes. Many clients need both in one estimate, and we price the complete hydraulic package rather than splitting it across two firms.
Do you handle council compliance?
Yes. Council requirements and catchment calculations are built into the pricing rather than assumed at the end.
What do you need to start a civil estimate?
Your civil drawings and the hydraulic engineer's report. Standard scopes are back within a week, and complex civil infrastructure has the timeline confirmed at engagement.
Explore more.
Need civil stormwater priced correctly?
Send us your civil drawings and hydraulic engineer's report. Standard scopes back within a week, complex civil infrastructure with the timeline confirmed at engagement.
Request an estimate