How to Extend a Single Storey House Without Blowing the Budget
One of the most effective ways to unlock extra living space without relocating is to extend a single storey house. Whether you’re adding a new bedroom, extending your kitchen, or creating a larger open-plan living area, the right approach can enhance your lifestyle and increase the value of your property.
If you’re wondering how to extend a single storey house, here’s what you need to know before you begin.
Start With a Site-Specific Plan
Every property is different, and there’s no one-size-fits-all method when it comes to extending. The first step is assessing your block, access, and existing structure. In many cases, a rear extension is the most straightforward and affordable approach – especially if you have unused yard space.
Side extensions can also work well for corner blocks or homes with generous setbacks. Less common, but still possible, are front extensions, which often require a more detailed review of council regulations and streetscape impact.
At Wal Robbins, we begin every project with a detailed site assessment to identify what’s feasible, what will require approval, and where the best value lies.
Understand the Approval Process
In New South Wales, most home extensions fall under either Complying Development (CDC) or Development Application (DA) pathways. CDC can fast-track your approval if your plans meet specific requirements – such as setbacks, floor space ratios, and height limits. DAs, while more detailed, allow more flexibility in design and layout.
An experienced builder can help you navigate this process and ensure your extension meets local council guidelines, building codes, and energy efficiency standards.
Think About Function Before Floor Area
More space isn’t always better – it’s how that space works that counts. Instead of focusing on maximum square metres, think about how the extension will improve the way your home functions.
Can you reconfigure internal walls to create flow? Will moving doors or windows improve ventilation or light? Would a small bump-out deliver the kitchen or dining room upgrade you’ve been wanting? These functional upgrades often cost less and deliver more than simply adding extra rooms.
Knowing how to extend a single storey house is as much about design thinking as it is about construction.
Budget for Structure and Services
Structural changes – such as removing load-bearing walls, changing the roofline, or modifying foundations – are often the biggest cost drivers. You can reduce expenses by working with your home’s existing framework rather than redesigning from scratch.
Likewise, extending your house in a way that keeps plumbing and electrical changes minimal can significantly reduce costs and complexity. Adding a bathroom at the opposite end of the house, for example, might look good on paper but come with added service connection costs.
Choose a Builder With Experience in Extensions
Single storey extensions require a different skillset than new builds. They often involve working around occupied spaces, managing access constraints, and integrating new structures with old ones seamlessly. That’s why it’s essential to choose a builder who specialises in home extensions – not just general construction.
At Wal Robbins, we’ve delivered hundreds of successful extensions across Sydney. We provide design-and-construct services that take the stress out of planning, keep your budget on track, and bring your vision to life with minimal disruption.
Ready to Extend Your Single Storey Home?
If you’re planning to extend and don’t know where to start, speak to the team at Wal Robbins. We’ll guide you through every step – from concept to completion – with clear advice, smart solutions, and decades of experience in transforming Sydney homes.
