# SNZ Plumbing Estimating

> Specialist hydraulic and civil estimating consultancy for Australian plumbing
> contractors, builders and developers. We produce tender-ready plumbing and
> hydraulic estimates: takeoff, labour, materials, plant and overheads, itemised.

Based in Bankstown NSW with offices in Melbourne and Brisbane. ABN 40 646 914 141.
Over 300 projects priced. Civil engineering background, 12+ years specialist estimating.

- [About SNZ Plumbing Estimating](https://snzplumbingestimating.com.au/about-snz/): company profile, specialisation, coverage and founder. Specialist hydraulic and civil estimating firm in Sydney serving contractors across all Australian states. 300+ projects, 5.0 rating from 69 reviews.

- [AI vs Human Estimating](https://snzplumbingestimating.com.au/ai-vs-human-estimating/): where AI estimating is strong (counting) and weak (scope, penetrations, TMVs, RPZDs, site constraints). Real case: AI estimate came in ~40% below SNZ on a Southport high-rise.

## What we do
- [Hydraulic Estimating](https://snzplumbingestimating.com.au/estimating/): full tender estimates for commercial, residential and industrial hydraulic services.
- [Variation Assessments](https://snzplumbingestimating.com.au/plumbing-variations/): priced variation claims and defence of rejected claims.
- [Design Change Comparison](https://snzplumbingestimating.com.au/design-change-comparison/): cost delta between drawing revisions.
- [Civil & Stormwater Estimates](https://snzplumbingestimating.com.au/civil-stormwater-estimates/): in-ground drainage, stormwater and civil works.
- [Acoustic Lagging Takeoff](https://snzplumbingestimating.com.au/acoustic-lagging-quantity-survey/): quantity survey for acoustic pipe lagging.
- [Materials Order List](https://snzplumbingestimating.com.au/materials-order-list/): procurement-ready material schedules.
- [Budget Pricing](https://snzplumbingestimating.com.au/budget-pricing/): early-stage feasibility and budget numbers.

## Free tools
- [Bedding & Spoil Calculator](https://snzplumbingestimating.com.au/bedding-spoil-calculator/): free calculator for pipe trench bedding, backfill and spoil quantities, in m3 and tonnes. Australia's only free tool of its kind.

- [Core Hole Calculator](https://snzplumbingestimating.com.au/core-hole-calculator/): free calculator for slab and wall core penetrations. Enter fixture counts, get core sizes, quantities and cost including working-at-heights and hand-held drilling extra-overs.

## Reference guides
- [How to Calculate Bedding and Spoil for a Pipe Trench](https://snzplumbingestimating.com.au/how-to-calculate-bedding-and-spoil-pipe-trench/)
- [Pipe Bedding & Trench Width: The 75 mm Rule](https://snzplumbingestimating.com.au/pipe-bedding-trench-width-the-75-mm-rule-why-it-matters/)
- [Fire-Rated Penetrations: Collars, Wraps & Mastic](https://snzplumbingestimating.com.au/fire-rated-penetrations-for-plumbers-collars-wraps-mastic-basics/)
- [Backflow Prevention: When an RPZD Is Required](https://snzplumbingestimating.com.au/backflow-prevention-when-rpzd-is-required-tundish-setup/)
- [Grease Traps: Sizing & Compliance 2025](https://snzplumbingestimating.com.au/grease-traps-for-commercial-kitchens-sizing-compliance-2025/)
- [Rainwater Tanks: BASIX Compliance & Sizing 2025](https://snzplumbingestimating.com.au/rainwater-tanks-for-new-homes-basix-compliance-sizing-2025/)
- [NDIS SDA Plumbing Requirements: Class 3 Dwellings](https://snzplumbingestimating.com.au/ndis-sda-plumbing-requirements-class-3-dwellings-2025-guide/)
- [Plumbing & Drainage Testing: NSW 2025 Rules](https://snzplumbingestimating.com.au/testing-plumbing-drainage-systems-whats-mandatory-in-nsw-2025/)
- [Full blog index](https://snzplumbingestimating.com.au/blog/)

## Contact
- Quote requests: https://snzplumbingestimating.com.au/contact/
- Email: estimating@snzplumbingestimating.com.au
- Phone: 0451 404 645
- Sitemap: https://snzplumbingestimating.com.au/sitemap.xml