Supa Group designs and builds second storey extensions that add space, value and certainty, all managed from concept to completion.
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Over 50 years experience
Fixed price & completion time
Concept to completion
Free design consultation
A second storey extension is a practical way to gain space without leaving the neighbourhood you love. Supa Group specialises in designing and building upper-level additions that respect your existing home, manage structural complexity, and deliver long-term value through a proven, end-to-end process.
We design and build second storey extensions that respond to how Melbourne families actually live. Each project is tailored to your home’s structure, site conditions and long-term needs, with structural integrity and build quality prioritised throughout construction.
Explore recent second storey extensions we’ve delivered across Melbourne. You’ll see real layouts, finishes and design solutions, plus what homeowners achieved by building up instead of moving.
You want certainty when building a second storey extension. Our integrated team manages everything from design to construction, with fixed pricing, confirmed timeframes and council approvals handled in-house.
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 second storey extension moves from early feasibility to build, with clear stages that keep approvals, timing and documentation on track.
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Meet with our team to talk through your needs and inspect your home. We’ll outline likely design directions, key constraints and the best path to move forward with confidence.
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Your concept is developed into a build-ready plan, including structural considerations and practical details that reduce disruption during construction.
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Approvals, coordination and pre-start planning are handled by our team, keeping the process moving and giving you clarity on timing before works begin.
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From site start to completion, you’ll have a structured build stage plan and a team that communicates clearly. At handover, you’ll receive peace of mind in the quality delivered.
Planning a two storey extension requires careful thought about your home's foundation. Our extension builders assess the structural integrity of an older home to ensure it can support another level safely.
Before building a 2nd storey, we must confirm the existing ground floor can hold the additional weight. This involves reinforcing the footings or internal walls to meet Melbourne’s strict building codes. We help you customise a layout that maximises floor space while ensuring the safety of your two-storey house. We aim for minimal disruption to your daily life during these renovation projects.
Every house extension in Melbourne must comply with local council and zoning laws. These regulations often cover the height of the upstairs extension, overshadowing of neighbours, and privacy setbacks. As experienced home extension builders, we handle the entire permit process for your second-storey extension. Your dream home project meets all legal requirements before the craftsmanship on-site begins.
Understanding the cost of a second-storey addition is essential for your budget. The total extension depends on the size of the second storey additions and the materials used. While a double-storey home may have higher initial extension costs than a single-storey extension, it saves your backyard space. We provide a fixed price to ensure you know exactly how much your second floor extensions will cost.
Turning a single storey house into a two storey extension creates an entirely new lifestyle. You can add more space for a growing family without the need for a ground-floor extension. This transformation significantly increases the value of your property in competitive markets like Australia. Our team ensures the new level blends seamlessly with the original design of your older home.
Most second storey home extensions take approximately 6 to 12 months from the start of building to completion. This idea involves removing parts of the roof and installing a new floor system for the 2nd level. We coordinate every builder to keep the project on schedule. Our goal is to deliver a high-quality upstairs extension with a fixed completion time for your peace of mind.
When you add a new level to an existing home, you want to know it’s built properly. Supa Group provides a 10-year structural guarantee on your second-storey extension that protects your investment.
A second-storey extension can deliver major living space without taking up your backyard. Costs depend on whether you’re building a partial upper level or a full double-storey addition to the existing home.
From $350K +
This range is a guide only, because every house extension is different. Costs change based on how much floor space you add, whether bathrooms are included, and how much structural work your existing home needs. Stair placement, roof changes, and finishes also shift the budget. Your builder should confirm the scope early, so you understand what’s included and can compare options with confidence.
We’re proud to be recognised for our work on home extensions and renovations. These awards reflect the quality design we’ve implemented for home extensions across Melbourne.
A second storey extension involves design, approvals, and skilled trades on-site. Our accreditations and industry memberships reflect an established approach to quality and compliance.
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.
Looking at extensions in Melbourne and not sure where to start? We help homeowners plan second-storey extensions that add real living space and suit the existing home.
Our leadership stays involved from start to finish. Meet the founders and the wider team who help Melbourne homeowners create their dream space.
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.
Choosing a builder is easier when you can see real outcomes, not just marketing. Watch a short client story and read their feedback on how the finished extension fits their home.
“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.”
Hear more
Building a second level involves coordinated tradespeople and strict site requirements. We provide licence and insurance documents so you can review them to ensure your extension will go to plan.
Supa Group works across metropolitan Melbourne, delivering second storey extensions that suit the home, block and neighbourhood. Find your suburb below.
We address common questions regarding costs, council permits, and how a second-storey extension impacts your daily life.
In many cases, you can remain in your home while we build your upstairs extension. Our process is designed for minimal disruption to your family routine. We provide a fixed completion time so you can plan your schedule with total confidence. Learn more about what to expect during our build stages.
The cost of a second-storey addition depends on the size and complexity of your renovation. While extension costs vary, we offer a fixed price contract to give you total financial certainty. Factors like the materials used and structural requirements will influence whether a project may cost more or less. Read our blog on extension costs for more details.
Building a 2nd storey requires high-level expertise to manage the structural integrity of the older home. While technically complex, our experienced team makes the process seamless from concept to completion. We manage every tradesperson to ensure your two-storey extension meets all safety standards.
Yes, every house extension must comply with your local council building regulations. These rules cover things like overlooking, overshadowing, and the overall height of your storey house. Our home extension builders handle all permit applications to ensure your project is fully compliant. You can view our design services for more information.
Want more ideas before you start? Browse our blogs for practical tips that help you make confident decisions before committing to a build.
Want to add extra space to your home but can’t decide between ground floor and second-storey extensions? We break down house extension costs. Discover more.
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