10+ years of perfection in every project.
With a presence in 150+ global locations.
Mechanical services are essential to the safety, comfort, and operational efficiency of modern buildings across Australia. From residential mechanical systems to complex commercial and industrial installations, accurate mechanical estimating is critical for proper planning and cost control.
COMET Estimating specialises in professional mechanical estimating services throughout Australia. Our estimators review drawings, layouts, specifications, equipment schedules, and coordination requirements in detail. We calculate accurate quantities for materials, labour, plant, installation, testing, and commissioning to support smooth project delivery.
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Work with a team that delivers consistent, detailed, and on time estimates so you never face delays or guesswork.
Best Rating in your town in estimating business
Our mechanical estimating services cover all aspects of mechanical system installations, from HVAC to plumbing and fire protection. We provide detailed estimates that account for every part of the mechanical system, ensuring that your project is planned and budgeted correctly. Here’s what we offer
We provide estimates for HVAC equipment, labor, materials, and energy-efficient solutions, ensuring accurate costs for installation, ductwork, and sustainable system components.
Our plumbing estimates cover pipes, fixtures, labor, and any specialized systems required for commercial, industrial, or medical projects, ensuring reliable water supply and drainage.
We estimate costs for sprinkler systems, fire alarms, and specialty fire suppression systems, including all components needed to ensure building safety.
We provide estimates for wiring, lighting, power distribution, and related labor, ensuring all electrical and lighting systems are accurately costed and installed.
We estimate costs for chilled water systems, solar and green building systems, and complex medical or laboratory mechanical installations, covering all specialized requirements.
We include costs for heavy machinery, specialized tools, and equipment rentals needed for large mechanical projects, ensuring all installation and operational requirements are met.
We proudly work with a wide range of professionals and organizations involved in mechanical and construction projects at COMET Estimating. Our accurate and dependable mechanical estimates help clients plan smarter, submit competitive bids, and complete projects efficiently.
Our mechanical estimating process is streamlined and efficient to ensure you get the most accurate estimate as quickly as possible. Here’s how we work
Send us your project details, including blueprints, specifications, or just a rough idea of what you need. The more detailed your information, the more accurate our estimate will be.
Once we receive your project details, we’ll send you an initial quote for our estimating services. Once you approve, we begin preparing the detailed estimate.
Our team uses advanced estimating software and industry best practices to calculate material quantities, labor costs, equipment needs, and more. We ensure every aspect of the mechanical system is accounted for.
After finalizing the estimate, we provide it to you in a clear, professional format (PDF or Excel). You’ll have all the details you need to move forward with your mechanical system installation.
Here’s why contractors, developers, and property owners trust COMET Estimating for their mechanical estimating needs
We specialize in mechanical system estimating, with experience across a wide range of systems and project types. Whether it’s HVAC, plumbing, fire protection, or electrical systems, we provide accurate estimates tailored to your needs.
We use the latest tools and industry standards to ensure the accuracy of our estimates. Every detail, from materials to labor, is carefully considered to provide you with reliable cost breakdowns.
We know that time is critical in construction projects. We provide fast, efficient estimates, typically within 24-48 hours, depending on the project scope.
Allow COMET Estimating to add accuracy and lucidity to your demolition project. Our professional estimators provide precise takeoffs and cost evaluation that will assist you to plan more accurately, bid wiser and win more contracts. Get in touch with us and get a free quote today and find out why professionals in the industry have put their money on Comet to provide results that count.



Mechanical projects can face serious challenges when estimates are inaccurate. At COMET Estimating, we understand that incorrect mechanical estimates can affect cost, schedule, safety, and overall project performance. Below are some of the most common problems caused by wrong mechanical estimating
Underestimating mechanical materials, equipment, or labor can lead to unexpected expenses that push your project over budget.
Inaccurate mechanical estimates may cause shortages of materials, equipment, or skilled labor, resulting in project delays.
Failure to plan correctly for mechanical systems can lead to safety risks, permit issues, and non-compliance with regulations.
Wrong estimates can result in excess or insufficient materials and manpower, reducing efficiency and creating waste.
Frequent changes in cost and schedule can damage credibility and harm long-term business relationships.
Poor estimates make it harder to manage mechanical work, budgets, and timelines effectively throughout the project.
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Mechanical estimating mistakes can slow down projects and increase costs. At COMET Estimating, we provide detailed and dependable mechanical estimates that help you plan with confidence, reduce risk, and keep your project moving forward without surprises.
Simply send us your project details, and we’ll provide an initial quote for our estimating services. Once approved, we’ll begin preparing your detailed mechanical estimate.
Yes, we include all necessary equipment and tool costs in our estimates, whether they are purchased or rented.
We can revise the estimate if there are changes to the project scope or requirements. Our goal is to ensure you have an accurate estimate at every stage.
We offer estimating services nationwide. Contact us for more details on whether we can assist with your project location.
Ready to get an accurate mechanical estimate for your next project? Start by sending us your project details, and we’ll provide you with a detailed, reliable estimate that helps you stay on budget and on schedule.
59 King Road, HARKAWAY, VIC, 3806
Monday - Friday
09:00 AM Until 05:00 PM