Variations in Construction: Why "Get It In Writing" Could Save Your Business

Published by Odyssey Legal | Business & Litigation Lawyers

Every builder has been there. You're halfway through a project when the client asks for a small change: different tapware, extra downlights, maybe a fresh coat of paint in a different colour. It seems straightforward enough. You're already on site, the relationship is good, and you want to keep the client happy. So you crack on with the work, send through an email confirmation, and assume everyone's on the same page.

Then the invoice lands, and suddenly there's a problem.

This scenario plays out across construction sites every single day, and it's one of the most common sources of payment disputes in the building industry. The frustrating part? It's almost entirely preventable.

Within this article, we will explain why it is crucial for builders to ensure to have their variations in writing. Alternatively, you can watch our Youtube Video explaining this (click here).

The Problem with Verbal Variations

In construction contracts, variations refer to any changes to the original scope of work. They might be additions, omissions, or modifications to what was initially agreed. While they're a normal part of most building projects, they're also a legal minefield if not handled correctly.

The core issue is simple: if a variation isn't properly documented and agreed to in writing before the work begins, you're leaving yourself exposed. The client can dispute the additional costs, claim they never agreed to the work, or argue that the variation should have been included in the original quote.

Australian consumer law and standard construction contracts are clear on this point. Without proper written approval, you may find yourself doing work you can't legally charge for.

Why Email After the Fact Isn't Enough

Many tradies believe that sending an email once they've started the work provides adequate protection. Unfortunately, this approach has a critical flaw: timing.

If you email a variation quote after you've already commenced the additional work, you haven't given the client a genuine opportunity to accept or reject the variation. They can reasonably argue that they felt pressured to agree because the work was already underway, or that they never actually consented to the additional cost.

Courts and tribunals take a dim view of retrospective paperwork. The law requires informed consent before the obligation is created. Starting work first and seeking approval later undermines this fundamental principle.

What Proper Variation Documentation Looks Like

The good news is that protecting yourself doesn't require complex legal documentation. A proper variation order doesn't need to be fancy, it just needs to be clear and completed at the right time.

At minimum, your variation documentation should include:

• A clear description of the additional work. Be specific about what's changing. "Supply and install six additional downlights in kitchen area" is far better than "extra lights."
• The cost breakdown. Include labour, materials, and any other charges. Transparency here prevents disputes later.
• The impact on the timeline. If the variation will delay completion, state this clearly.
• Written approval before commencement. This is non-negotiable. The client needs to sign off before you start the work (unless it is urgent).

Many builders use a simple variation form or template that can be quickly filled out on site. Others use digital solutions that allow clients to approve variations via email or app with a clear paper trail. The method doesn't matter as much as the principle: document first, build second.

The Real Cost of Poor Documentation

When a variation dispute ends up in tribunal or court, the builder without proper paperwork faces an uphill battle. Even if you genuinely did the work and the client clearly requested it, you may struggle to recover your costs without written evidence of agreement.

Beyond the immediate financial loss, these disputes damage client relationships, consume valuable time, and create stress that affects your business and personal life. For smaller operators, a single significant dispute can threaten business viability.

The irony is that the time investment to properly document variations is minimal, often just five or ten minutes per variation. Compare that to the hours spent in dispute resolution, the legal costs, and the potential loss of the full variation amount, and the value proposition becomes obvious.

Building a Variation Management System

Protecting your business doesn't require a complete operational overhaul. Here's a practical framework:

• Create a template (or use QBCC, HIA or Masterbuilders Templates). Develop a simple, clear variation order form you can use repeatedly. Include all essential elements and leave space for project-specific details.
• Make it routine. Establish a firm policy: no variation work begins without signed approval. Train your team on this non-negotiable rule.
• Communicate early. When a client requests changes, immediately explain that you'll need to price it up and get their written approval before proceeding. Most reasonable clients will understand and appreciate the professionalism.
• Keep records. Maintain a file of all approved variations with your project documentation. Digital copies with timestamps provide excellent evidence if needed.
• Don't skip it for small changes. It's tempting to wave through minor variations without paperwork, but small disputes can escalate just as quickly as large ones. Consistency protects you.

When Clients Push Back

Occasionally, you'll encounter clients who resist formal variation processes, viewing them as bureaucratic or suggesting that you "just do it and we'll sort it out later." This is precisely when your documentation discipline becomes most important.

A professional response might be: "I'd love to help with this change, but my business policy requires written approval for any work outside our original agreement. It protects both of us and ensures we're on the same page about costs before I commit resources."

Most clients will respect this boundary. Those who don't are signalling potential payment problems ahead.

The Bottom Line

The construction industry operates on tight margins. You can't afford to do work you won't be paid for, and you shouldn't have to. Proper variation management isn't about distrusting clients, it's about professional business practice that protects everyone involved.

The lesson is straightforward: no paperwork, no paint. Or downlights. Or tapware. Or anything else that wasn't in the original scope.

Get it in writing, get it signed, then get to work.

Contact Odyssey Legal:

• Phone: 07 5370 8759
• Email: info@odysseylegal.com.au
• Location: Servicing all of Queensland
• Book Your Free Initial Consultation: We offer a free initial consultation to assess your situation and provide clear advice on the best path forward.

About Odyssey Legal

Odyssey Legal is an expert building & construction law firm, servicing all of Queensland. We focus exclusively on helping Queensland businesses or our clients resolve disputes, recover debts, and protect their interests through strategic legal advice.