How to plan and stick to your renovation budget

Midcoast Financial Planning • August 5, 2025

Define your renovation goals


Renovations can be an exciting time to re-shape the look and feel of your home, however before you start getting into the details, it’s important take a step back and clarify ‘why’ you’re renovating. For instance:


Do you need more space?


Is your kitchen too dated?


Are you looking to boost your home’s resale value?


Being clear about what you’re trying to achieve is a great first step to help you focus on your renovation costs. Once you know what you’re aiming for, start with a list of must-haves and nice-to-haves so you can prioritise what is essential and what is an optional extra.

Be clear about your budget


Once you know what you’re looking to achieve, the next step is figuring out what you can afford. Take a good look at your finances and decide how much you’re comfortable spending without draining your savings. To help you plan, you can also use renovation and building calculators online to help you get a rough estimate of costs. If you think you’ll need to take on some debt, you have options like using equity, personal loans for renovation or construction loans. A personal loan borrowing calculator can offer some estimates on how much you can borrow. If you need support deciding, it’s best to get advice from a financial advisor.


Use your home’s equity


If you’re looking finance a large-scale renovation without dipping too deeply into your savings, tapping into your home’s equity can be an option. Home equity is essentially the difference between what your home is worth and what you still owe on your mortgage. You can borrow against the equity by topping up your existing home loan. Your lender will do a valuation of your property to determine equity available and how much you can borrow, while keeping your loan-to-value ratio (LVR) within acceptable limits.


It’s important to be cautious that borrowing against your home’s equity means you’re taking on more debt, which in turn can carry more risk. That’s why it’s important to only borrow what you can repay and make sure your renovations boost your home’s value.


Get multiple quotes from your tradespeople


If you’re doing a big renovation or extension, you need plans and designs that you can get proper quotes on. Start by getting quotes from multiple builders or tradespeople as it’s a great way to make sure you’re getting the best deal you can. You’ll be surprised how much these quotes vary. Also consider the contractor’s experience, how well they communicate as well as reviews and recommendations from friends and family.


Break down the costs


Review the costs of labour, materials, and any permits you’ll need and don’t forget to include taxes and fees in your calculations.


The build costs will depend on a number of things, such as:


  • The materials you want to use
  • The tradespeople you employ
  • The quality of work, finishes and fittings
  • The size of the job
  • The location of your site.


It’s always helpful to assume a project will cost more than expected. A 10-20% buffer in your budget will make sure you are ready if any  emergencies  or surprises that appear, like hidden water damage or delays.


Remember: A budget that feels tight now will save you from financial stress later. Consider the maximum amount you’re willing to spend and work backwards to fit everything into that number.


Monitor your spending and adjust accordingly


When the renovation begins, it’s important to keep tracking costs against your budget and make sure you stay on track or are able to adjust if things take an unexpected turn. You might need to put off one part of the renovation or opt for less expensive alternatives to certain materials. Always pay contractors in stages as this will give you more control and ensure the work gets done right.


Think about long-term value


When you’re budgeting, think about the long-term impact of your renovation and focus on projects that improve your home’s functionality, energy efficiency or resale potential. If you can, include some basic energy-saving ideas in your renovation like:


  • LED lights
  • rainwater tanks
  • quality insulation
  • solar panels.


Think of your renovation as an investment that doesn’t just help you today, but for all the years to come.


Source: NAB
Reproduced with permission of National Australia Bank (‘NAB’). This article was originally published at https://www.nab.com.au/personal/life-moments/home-property/renovate/costs
National Australia Bank Limited. ABN 12 004 044 937 AFSL and Australian Credit Licence 230686. The information contained in this article is intended to be of a general nature only. Any advice contained in this article has been prepared without taking into account your objectives, financial situation or needs. Before acting on any advice on this website, NAB recommends that you consider whether it is appropriate for your circumstances.
© 2022 National Australia Bank Limited (“NAB”). All rights reserved.
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