Create more space with a single storey home extension designed to suit your Melbourne home, block and lifestyle, without the stress of moving.
Over 50 years experience
Fixed price & completion time
Concept to completion
Free design consultation
Single storey extensions can create open-plan living, add bedrooms or improve indoor-outdoor flow. We see many Melbourne homeowners choose a ground-floor extension as a practical way to transform their home without having to move.
A single storey extension allows you to:
We design and build single storey home extensions including rear extensions, new living zones and more. Each ground floor extension is tailored to your existing home, block access and budget, so the layout feels seamless and practical for everyday living.
We deliver first-floor extensions to help homeowners expand their current homes with confidence. Every project is designed to suit the existing house, block conditions and your lifestyle needs.
With over 50 years of experience, Supa Group delivers extensions across Melbourne using a one-team approach, managing your upgrades from the first consultation through to completion.
A single team manages design and construction, so your custom home extension stays aligned from day one.
Get clarity upfront, with fixed pricing and a clear build timeline from the start.
We coordinate trusted trades and suppliers to maintain quality and keep the project moving.
We deliver well-designed extensions that suit your existing home, improve liveability and support property value.
See how your single storey extension in Melbourne moves from early planning to build, with clear stages that keep decisions, timing and documentation on track.
01
Obligation-free first meeting to understand your goals, lifestyle and budget, and assess what’s possible for your home extension
02
We develop practical plans and a 3D concept, then prepare compliant drawings and a fixed-price quote within 4 weeks.
03
After you approve the concept, we finalise drawings, engineering and permits, then manage staged construction.
04
Move into a finished space that fits your family, with complimentary aftercare to ensure everything performs as expected after handover.
Before you commit to a build, it helps to understand costs, permits and design pathways. Here are practical notes on planning a first-floor extension, plus ideas and comparisons to support your decision.
Extension cost is shaped by size, complexity and finish selections. The cost of a single storey build varies depending on structural changes, drainage, energy requirements and access for trades. We separate core build costs from optional upgrades and highlight additional costs early, so you can compare price options with clarity.
Approvals can differ from one suburb to the next; extensions in Melbourne vary depending on overlays, setbacks and neighbourhood context. Extensions must comply with building regulations and may require planning permits. A clear strategy upfront reduces delays and helps keep your documentation aligned with council expectations.
A double storey extension can add area while keeping backyard space, but it may introduce more structural and approval considerations. Single storey options can deliver simpler access and natural flow across the ground floor. We’ll compare both pathways so you can choose a single storey extension only when it’s the best fit for your site.
Moving can come with hidden costs beyond the purchase price, including stamp duty and re-establishment. A targeted home improvement can be a smarter route when you like your location and want more comfort. A renovation and extension can transform your Melbourne home and improve how it works, while keeping your community ties.
Popular single storey extension ideas include rear extensions for open-plan living, ground-floor additions for a master suite, and flexible zones for work or guests. The best layouts connect indoor spaces to the backyard and improve how the home feels day to day. We tailor ideas to your block so the extension feels part of the existing house.
All our work adheres to Victorian building regulations and is covered by appropriate warranties. Our single or ground-floor work is built to last, with a 10-year structural guarantee.
The cost of a single storey extension in Melbourne varies depending on your house’s size, site access and finishes chosen. Use these price ranges as a guide, then book your first consultation for an estimate based on your home and goals.
$100k - $350k
Ground-floor additions are often the most common way to extend a single storey house. Price varies depending on layout complexity, soil and slope, service relocations and finish level. Additional costs can include planning permits, building permits, engineering and wet areas. Compared with buying a bigger house and paying stamp duty, an extension can be a smarter move.
Supa Group is proud to be recognised within the Australian building industry. Our work has been nominated for and won several awards, reflecting the quality of our outcomes in Melbourne.
Building a single storey extension involves regulations, permits and qualified builders. We follow all relevant Victorian building requirements and work within recognised industry standards.
As a member of Master Builders Victoria, we’re recognised as a reliable and reputable business that completes works to the highest industry standards.
We’re proud to be a part of Australia’s biggest residential building association that promotes fairness, integrity, and value.
Most recently, we were finalists in the Professional Small Builder/Renovator category in the 2022 HIA Awards.
If you love your home but need more space, a ground-floor addition can be a smart home improvement. Contact us today to plan a single storey house extension that suits your lifestyle.
With over 50 years of experience, Supa Group has helped homeowners improve their Melbourne homes through extensions and renovations.
Registered Builder with 30+ years’ residential experience, leading teams with practical expertise, mentorship and a client-first approach.
Chartered Accountant with 20+ years’ experience, driving sustainable growth through referrals, strong leadership and genuine client care.
Qualified carpenter with 30+ years’ experience, ensuring every project meets Supa Group’s standards for quality, detail and timely delivery.
Your first point of contact, providing clear guidance on the extension journey while managing Supa Group’s marketing and digital presence.
Building design and construction specialist with 20+ years’ experience delivering functional, well-designed home extensions built to last.
Hear directly from Melbourne homeowners who’ve completed single storey extensions with Supa Group. These testimonials share real experiences of the build journey and the finished result.
“The whole process was very relaxed and easy from start to finish. We loved where we live and didn’t want to move, so the goal was to turn our house into a forever home that worked better for our family. That meant adding an extra bathroom, creating bigger rooms for the kids, and opening up the living space at the back. The team really helped bring that vision to life and even suggested ideas we hadn’t thought of. They were great to deal with, very organised, easy to communicate with, and always kept us in the loop. The workmanship is perfect, we genuinely couldn’t fault anything, and the end result turned out even better than we expected.”
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“We bought the house knowing it was still in its original 1950s condition, so the goal was to modernise it while still keeping its character. We wanted a better layout, a second bathroom, and a more open living space that worked for everyday living. The team really understood what we were trying to achieve and helped bring it all together in a practical, efficient way. They were easy to deal with, kept things moving, and communication was clear throughout the entire build. The workmanship is excellent, and we were really impressed with both the quality and how quickly everything was completed.”
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Licensing and insurance form a key part of a compliant residential building. These documents outline the registrations and cover held for Supa Group projects, supporting transparency before your build starts.
If you’re considering a ground-floor extension for a Melbourne home, we’ll confirm site access, council requirements and next steps during your first consultation.
From price and additional costs to planning permits and building regulations, these FAQs explain what to expect when extending a single storey house.
In most cases, homeowners find it preferable to move out of the home for at least part of the construction. As an experienced builder, we will plan to minimise disruptions to your living area. You can continue to live at home throughout the construction as long as you still have access to the kitchen and bathroom facilities.
The cost of a ground-floor extension varies depending on the scope of the work. Ground-floor extensions typically involve new kitchens, pantries, laundries, and open-plan living areas. But they may also be as simple as adding a couple of bedrooms or a living room. Other factors include the overall size and type of materials used.
Every project is different, so the best way to find out how much your ground-floor extension will cost is to book an initial consultation with one of our experienced Design Consultants.
When it comes to completing a ground-floor extension in your existing home, options are limitless. We can deliver quality single-storey extensions that can add the following to create more modern homes:
Depending on where you live, your local council may require you to seek planning permission or a building permit before you begin. Council approval is an essential part of our planning process, so we’ll let you know what other statutory costs are required.
Explore blog guides covering single storey extension ideas, layout inspiration and ground-floor additions.
Learn how to evaluate house extension costs and decide if a small or large house extension is the best way to add value and functionality to your home.
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Supa Group delivers home extensions on time with fixed start and completion dates. Discover our proven process for reliability, transparency, and quality results.
Read about itWondering how long it takes to build an extension in Melbourne? Our house extension experts break down the timeline for extending your first or second storey.
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