CALL US - (03) 9969 7764

Contract Management and Cost Consultant in Melbourne, VIC

Welcome to Cornerstone Estimating Pty Ltd. Our contract management company in Melbourne, VIC, helps construction subcontractors all across the Metropolitan Melbourne and Greater Melbourne areas with cost consulting and contract management services to protect their margins on Construction projects. Our service is built for flooring, joinery, tiling, and other specialist architectural trades earning between $1–5 million per year who are tired of losing money to mistakes, variations and disputes. By staying involved during the build and helping with your Commercial Management and Contract Administration, we keep control of your costs, get paid for any changes and finish jobs without your margins being continuously chipped away.
Call Us - (03) 9969 7764

Cornerstone Estimating Pty Ltd

WIN MORE WORK, STOP CHASING PAYMENTS, AND START TAKING CONTROL

At Cornerstone Estimating Pty Ltd, we work alongside architectural finishing trades/subcontractors throughout tender and live construction projects to protect cash flow and margins before problems turn into losses. Our focus is on the commercial side of construction - reviewing contracts, managing variations, submission and tracking payment claims and helping clients respond properly to on-site changes as they happen.
Many subcontractors lose money by accepting verbal instructions, installing changes without approval, missing documentation or fixing issues that should never have been their responsibility. We help prevent that by guiding decisions in real time, flagging risks early and making sure additional work is priced, approved, and paid for. Our contract administrator has over 15 years of experience in the construction industry to guide you through the consequences and risks that happen as you enter projects.
Our work is hands-on and collaborative, we don’t step in after a dispute has already gone bad, we stay involved during the project to help clients avoid unpaid work, disputes and margin blowouts. Most clients work with us on a monthly retainer because having ongoing commercial support saves more than it costs. Whether you're quoting your next tender or chasing overdue payments, you can price competitively, claim confidently and protect your profits with Cornerstone Estimating Pty Ltd. Contact us today to see if we're a good fit.
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  • Get clarity on Contracts
  • Keep more of your Profits
  • Become Building & Construction Industry Security of Payment Act (SOPA) compliant
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Our Services

Our service is built for commercial subcontractors who want certainty, leverage, and control in the Pre and Post Contract phases of construction projects, not after mistakes have been made and money already lost. We work alongside you during the build to help manage costs, variations, scope changes and manage risk as they happen. By being involved early and consistently, we help prevent margin loss rather than trying to recover it later.
We offer a monthly retainer package for clients who want to work with us continuously and keep us in their 'back pocket'. Continual Contract Management and Quantity Surveying services guarantees you access to our time, attention and expertise indefinitely and on demand. This means priority support when decisions need to be made, clear oversight of capacity and risk exposure for the month, and the confidence to act without guessing or reacting too late. With us, you're not alone, and you don't have to do it yourself anymore. We help you with:
  • Commercial Management for Subcontractors: Ongoing commercial support works during tendering and live projects.
  • Variation and Change Management: Focused on helping subcontractors identify, price, document, and get approval for variations before work is carried out.
  • Contract Review and Scope of Works Review: Covers contract reviews, scope of works, exclusions, risk clauses, etc. Helping subcontractors understand what they are actually responsible for before and during the job.
  • Margin and Cash Flow Protection: This will be covered by our estimating, tendering, contract management, payment claim preparation (aligned with SOPA), and payment schedule review and response (aligned with SOPA) services.
Our Services and Pricing

Who We Work With

We work with commercial subcontractors delivering architectural and finishing trade packages on construction projects. These trades typically operate in tight margins, complex site conditions and high-pressure environments where small missteps can quickly turn into major financial losses. Our role is to support these businesses through the commercial challenges that come with specialist trade work.
We regularly work with the following trades:
  • Flooring (carpet, vinyl, hybrid, timber)
  • Joinery & Cabinetry
  • Plasterboard, Partitions & Ceilings
  • Painting (internal and external)
  • Tiling & Waterproofing
  • Windows & Glazing
  • Balustrades & Handrails
  • Glass Balustrades, Shower Screens
  • Stone Benchtops, Stone Flooring & Stone Walls
  • Carpentry (fit-out & finishing)
  • Facade & Cladding (architectural / non-structural)
  • Waterproofing
  • Roofing (commercial & architectural)
  • Access Systems (ladders, platforms, façade access)
  • Architectural Metal Fabrication (non-structural)
  • External Louvres & Screens
  • Render & Texture Coatings
  • Landscaping
  • Caulking
If your business works in any of these trades and you're facing tight margins that pressure your finances, give us a call at (03) 9969 7764 to see how we can help.

Why Choose Cornerstone Estimating Pty Ltd?

In commercial construction, margin loss can come from poor estimating, rushed decisions, unclear scope, verbal instructions and changes carried out without proper approval. Once the job is finished, the leverage is gone, and the loss is locked in. Traditional cost advice often arrives too late to change the outcome.
Our approach focuses on cost consulting before and during live construction projects, where decisions still matter and leverage is high. By being involved early and staying engaged throughout the job, we help subcontractors early to avoid mistakes that quietly erode profit and turn manageable projects into financial headaches.
Early Involvement That Prevents Losses
Most margin loss starts with small decisions made under pressure. We stay involved during live projects so changes, risks, and site instructions are handled properly before they turn into unpaid work, redo costs or disputes.
Built for Subcontractors
Our service is designed specifically for commercial subcontractors and finishing trades. We understand where risk usually sits, how leverage is lost and what subcontractors actually need to stay in control on site.
Ongoing, Practical Commercial Support
You get consistent access to hands-on guidance when it matters. No reports that sit on a shelf, just clear advice, real-time support and a steady focus on protecting margins and cash flow throughout the job.
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Commercial Management for Subcontractors

Commercial Management is about staying in control throughout the full project lifecycle — from pre-contract planning and negotiation through to delivery and final account (both pre- and post-contract phases). Many subcontractors only feel the impact of poor commercial decisions after the job is finished, when target margins are already lost and commercial leverage has disappeared. Our cost consulting services in Melbourne, VIC provide ongoing commercial support before and during live projects, helping subcontractors assess risk, strengthen contract positions, respond to site changes, and make informed decisions as work progresses. This gives clients consistent access to expert support, clearer oversight of commercial exposure and the ability to maximise leverage at the right time and protect profit before issues escalate.
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Variation & Change Management

Variations are one of the most common ways subcontractors lose money. Work is often carried out under pressure, based on verbal instructions or assumptions, with the intention of sorting it out later. Our variation and change management service focuses on identifying changes early, pricing them properly, and ensuring they are documented and approved before work proceeds. By managing variations at the right time, subcontractors maintain leverage, carry out work that will be paid, reduce disputes and avoid absorbing costs that were never part of the original agreement.
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Contract Review & Scope of Works Review

Many commercial contracts contain unclear or conflicting scope, clauses with hidden risks and ambiguous inclusions that only become obvious once issues arise on site. This service helps subcontractors understand what they are actually responsible for, both before work starts and throughout the project. By reviewing contracts and scope documents, our contract management team in Melbourne, VIC helps identify gaps, overlaps, and risk areas early, so subcontractors can make informed decisions and avoid taking on unintended obligations.
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Margin & Cash Flow Protection

Strong margins and steady cash flow depend on more than winning the job. This service focuses on protecting the commercial position throughout the project lifecycle through estimating, tender management, contract management, and payment claim preparation aligned with the Building & Construction Industry Security of Payment Act (SOPA) requirements. We also review and respond to payment schedules in line with SOPA, helping subcontractors get paid correctly and on time. By doing this, we help you reduce financial stress, limit exposure and keep projects commercially viable from start to finish.
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Our Partners

Service Businesses we've partnered with or have serviced:

How Our Contract Management Services Help Subcontractors

Our professionals help you understand what you agreed to, what’s changed, and what you’re entitled to be paid for. We help subcontractors review contracts, clarify scope, identify risk clauses, and deal with instructions properly as they arise on-site.
When contracts aren’t actively managed, subcontractors often take on extra work without realizing it. We guide clients through decisions before work is carried out, so changes are priced, documented, and approved instead of argued about later. If this is something you relate to and need help with, get in contact with us today and get started partnering up with our experts.
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What People Say

“Builder's always push us around on contract terms and payment delays. Cornerstone stepped in, and helped us get paid on a claim that was previously rejected. We won’t do another job without them.”
★★★★★
Keith Sandler
Focus Commercial Flooring
“We were spending so much time estimating and checking over quotes when we should be building the job. Kevin helped us ensure our estimates are detailed and easy for us and the builder to follow - we've definitely won more jobs since getting him involved.”
★★★★★
Elias Ishac
Lush Landscaping
"We had issues and disputes getting paid for variations - but since Kevin has come onboard, things run more smoothly for us and the Builder. I focus on site, and let him manage the Contract."
★★★★★
Henry Han
H&K Plastering
CORNERSTONE ESTIMATING PTY LTD
📞 Still thinking about it?Book a free, no-obligation chat. Let’s see if we’re the right fit.
Contact
📍 Melbourne-based. Available Australia-wide.
Kevin Chang - Director
Working Hours
Monday - Friday8:00 AM - 5:00 PM
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