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Plumbing & Hydraulic Estimating

Expertly taking the guesswork out of pricing plumbing and hydraulic systems.

Plumbing & Hydraulic Estimating Services
Fast. Accurate & Detailed.

At MJI Design, we take the guesswork out of pricing plumbing and hydraulic systems. With over a decade of hands-on plumbing experience and years of design and estimating expertise, we deliver reliable estimates that help you win jobs – and keep them profitable.

Whether you’re a builder needing sharp plumbing numbers, a developer working through feasibilities, or a plumbing contractor chasing tenders, our estimating service gives you an edge.

What We Offer

We provide detailed, accurate and fast hydraulic estimating across a range of project types:

  • Residential Developments
    Apartments, townhouses, and mixed-use sites.
  • Commercial Projects
    Offices, warehouses, hospitality, and retail spaces.
  • Public Infrastructure
    Education, healthcare, community centres, and more.

Our Estimating Scope Includes:

Every estimate includes a clear, written scope of works outlining exactly what is and isn’t allowed for. You’ll also receive a detailed, customisable Excel sheet that presents all figures in an easy-to-read format, including:

 

  • Fully customisable labour rates, profit margins and overhead rates tailored to your company.
  • Itemised BOQs (Bill of Quantities)
  • Fixture counts
  • Pipework and fitting take-offs (cold, hot, gas, stormwater, Sanitary, trade waste, fire service)
  • Labour allowances (based on realistic install times)
  • Preliminaries and setup costs
  • Design and documentation allowances (if applicable)
  • Plant & Equipment and materials priced to current market rates – we get these priced through the supplier of your choice.
Plumbing Estimating excel sheet

Why choose MJI Design?

We’re Plumbers at Heart

We know what it takes to install it, not just how to price it.

Real-World Pricing

Our costings reflect practical install times, local pricing, and trade practices – not abstract QS numbers.

We Know What Wins Tenders

After pricing hundreds of jobs, we know what builders look for — and how to keep your number sharp without undercutting scope.

We Can Bundle In Design

If your client needs full hydraulic documentation, we can roll that into your pricing from day one.

How it Works

1. Send Us Your Drawings

We’ll need the consultant hydraulic, civil and fire drawings includign and scope notes for the builder.

2. We Price It

We provide a thorough takeoff using a combination of groundplan and Simpro, broken down into floor levels, buildings or work stages depending on the project requriements.

3. Quick Turnarounds

Most estimates are returned within 2–10 business days.

4. Need a Variation or Reprice?

No stress. We’re flexible and responsive when plans change or revisions are needed.

We Work With

  • Plumbing contractors chasing tenders
  • Builders wanting to compare plumber quotes
  • Developers in feasibility and budgeting stages
  • Architects and consultants requiring D&C support

Flexible Pricing Models

Fixed fee per job
Ongoing retainer for volume clients

Looking for estimating?