Our core service

Hydraulic plumbing
estimating.

Full plumbing and hydraulic estimates — produced from your actual drawings, priced to your actual market, verified before delivery. Not benchmarks. Not averages. Not templates. The estimate your tender actually needs.

300+ Projects estimated
100% Hydraulics only
7 States covered
5.0 Google rating
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How it works
01
Send us your plans
Hydraulic drawings, architectural drawings and specification. We tell you upfront what we need and what we can estimate from what you have.
02
We confirm timeline and fee
Before we start any work we tell you exactly how long it will take and what it will cost. No surprises.
03
Full PlanSwift takeoff
Every pipe, fitting, riser and system individually measured from your drawings. Nothing averaged, nothing assumed.
04
Independent review
A second estimator checks every line item before delivery. The step most firms skip. We never do.
05
Delivery — on time
Complete, submission-ready estimate delivered within the agreed programme. We remain available for queries throughout your bid.
What we do

Plumbing and hydraulics.
Exclusively.

SNZ Plumbing Estimating does one thing — hydraulic estimating. Not electricals. Not structure. Not fitout. Every hour we work, every estimate we produce and every system we price is focused on plumbing and drainage. That specialisation is your advantage when your tender goes up against contractors using generalist estimators.

We estimate cold and hot water services, sanitary drainage, stormwater, gas reticulation, fire services interfaces, trade waste, civil hydraulics and every specialist system in between — from a standard residential apartment to an oil refinery with HDPE pipework, pressure vessels and RPZDs.

Every estimate is produced using PlanSwift digital takeoff from your actual drawings — not a rate per apartment, not an industry benchmark, not a template from a previous job. Your drawings. Your project. Your numbers. See our project case studies for proof of what that looks like in practice.

Measured from actual drawings
PlanSwift digital takeoff — every pipe length, every fitting, every riser individually measured from your specific drawings.
Timeline confirmed upfront
72 hours for small to medium projects. Large and complex scopes — confirmed at the start of every engagement before work begins.
Second estimator review
Every estimate is independently reviewed before delivery. On a hospital or a 25-storey tower this is non-negotiable. We never skip it.
Civil engineering foundation
Founded by a civil engineer with 15+ years hands-on experience — SNZ understands how hydraulic systems interact with the rest of the build.
What is included

Every system.
Every line item.

A complete SNZ hydraulic estimate covers every plumbing and drainage system in your project — nothing missed, nothing assumed.

Cold & hot water services
Complete cold water, hot water and hot water return reticulation — every pipe, every fitting, every riser individually measured and priced.
Sanitary drainage
Above and below ground sanitary drainage — stacks, branches, junctions, fixtures and connections. Every level, every apartment, every system.
Stormwater drainage
Roof drainage, subsoil drainage, carpark drainage and stormwater connections — sized and priced to AS/NZS standards.
Gas reticulation
Natural gas and LPG reticulation — meters, mains, sub-mains and appliance connections individually priced to specification.
Specialist systems
Trade waste, grease arrestors, thermostatic mixing valves, RPZDs, pressure vessels, HDPE pipework, fire services interfaces and all specialist hydraulic requirements.
Basement & civil hydraulics
Basement carpark drainage, sump pumps, civil stormwater, detention systems and below-ground hydraulic infrastructure.
Who we work with

Tier 1 contractors to
boutique developers.

SNZ works with every type of client who needs a hydraulic estimate — from a national Tier 1 contractor tendering a government rail programme to a boutique developer pricing a 5-storey apartment building. The methodology is identical. The standard is identical. Every client gets the same precision.

Our clients include Tier 1 civil contractors, government agencies, hospital developers, national retailers, residential developers, architects, hydraulic engineers and plumbing contractors across all states and territories and territories.

Head contractors
Tier 1, Tier 2 and Tier 3 builders tendering hydraulic scopes
Plumbing contractors
Plumbing subcontractors pricing their own hydraulic scope
Property developers
Developers needing hydraulic costs for feasibility and tender
Government agencies
State and federal government project procurement teams
Hydraulic engineers
Hydraulic consultants needing independent cost validation
Architects
Design firms needing hydraulic cost input at design stage
Also available
Variation assessments

Already on site and a design change has created additional scope? SNZ prices variations from the revised drawings against the original scope — fast, accurate and defensible.

Variation assessments →
Design change comparisons

When the hydraulic design changes mid-project, SNZ compares the two drawing sets and produces a clear, priced breakdown of exactly what changed and exactly what it costs.

Design change comparisons →

Ready to get your
estimate started?

Send us your plans and we will come back within a few hours with a fee quote and timeline. Small to medium projects within 72 hours. Large and complex scopes — confirmed upfront.

Request an estimate View our projects