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Navigating Hidden Issues in Home Renovations

  • Writer: Dylan Ferreiro
    Dylan Ferreiro
  • Nov 4, 2025
  • 2 min read

Updated: 4 days ago

In this guide, we’ll explain:

  • What kinds of hidden problems are common

  • How builders deal with them

  • What it means for your budget & timeline

  • How to protect yourself before work begins


Common Hidden Problems Found During Home Renovations


When a builder starts opening up your home, they may discover issues such as:

  • ✅ Rotting timber

  • ✅ Damp and mould

  • ✅ Asbestos

  • ✅ Outdated or unsafe electrics

  • ✅ Weak or damaged structural beams

  • ✅ Poor plumbing or leaks

  • ✅ Unstable foundations

  • ✅ Hidden pest damage


These problems are usually impossible to see during quoting and often only appear once work has begun.


Understanding the Impact of Hidden Issues


Hidden issues can significantly affect your renovation project. They can lead to increased costs and delays, which can be frustrating. However, knowing what to expect can help you manage your renovation more effectively.


What Happens When a Problem is Found?


A professional builder will:

  1. Pause work in the affected area

  2. Explain the issue clearly (photos included)

  3. Recommend solutions

  4. Provide a revised quote or variation notice

  5. Agree on any extra costs & time before continuing


A good contractor will never continue work without discussing it first. This communication is crucial for maintaining trust and ensuring that you are informed every step of the way.


Will It Cost More?


In most cases — yes, because it's additional work that wasn’t visible or included in the original quote.


This might include:

  • Labour for fixing the issue

  • Replacement materials

  • Specialist services (e.g. asbestos removal, structural engineer)


Tip: Ask for a contingency of 10–20% of your budget to cover unexpected issues. If you don’t need it — great! But you’ll be prepared if you do.


Will It Delay the Project?


It can, depending on the problem. For example:

  • Minor rot repair: small delay

  • Structural issue: longer delay

  • Asbestos: needs licensed removal & inspection


Your builder should explain the time impact as soon as they know. This transparency helps you adjust your expectations and plan accordingly.


How to Protect Yourself Before Work Starts


To avoid surprises turning into stress:

  • ✅ Get a detailed contract & scope of works

  • ✅ Ask how variations & extras are handled

  • ✅ Build a contingency into your budget

  • ✅ Choose a builder experienced with your property type

  • ✅ Request regular progress updates


Bonus: If your home is older (pre-1990s), expect more potential surprises — and plan accordingly. This preparation can save you time and money in the long run.


The Role of Communication in Renovations


Effective communication with your builder is essential. Regular updates and discussions can help you stay informed about any issues that arise. This proactive approach can make a significant difference in how smoothly your renovation goes.


Final Thoughts


Hidden issues can feel frustrating — but they’re usually necessary to fix for safety and long-term value. With clear communication, proper planning, and the right builder, surprises don’t have to derail your project — they become a manageable part of improving your home.


By understanding the potential challenges and preparing for them, you can ensure a more successful renovation experience. Remember, the goal is to create a space that you love and that meets your needs for years to come.

 
 
 

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