Family-owned, registered, and genuinely invested in your home. We bring care, integrity and craftsmanship to every renovation across Melbourne's western suburbs and inner city.
Brendan, ONQ Building GroupAt ONQ Building Group, you're not just another project. You're part of the journey.
ONQ Building Group is a family-owned renovation builder serving Melbourne's western suburbs and inner city. Led by registered building practitioner Brendan Cefai, we specialise in bathroom renovations from a fixed $23,000, kitchen renovations, full home renovations and home extensions, each one handled with transparent pricing and genuine care.
That's the practical side. Here's what it feels like to work with us. From the first phone call to the final handover, we care about the people behind the plans, the homes we're invited into, and the quality of every finish we leave behind.
Kitchens, bathrooms, extensions, full home renovations. Whatever the scope, we bring craftsmanship, clear communication and honesty to every step. Because we're not just building beautiful homes. We're building real relationships.
The kind of homes we'd want our own family living in.
As experienced builders across Melbourne's western suburbs and inner city, we offer a tailored range of renovation services designed to enhance your space and simplify the whole journey. Here's how we can help.
From tired and leaking to warm and beautiful. We renovate bathrooms across Melbourne from a fixed price of $23,000, so you know exactly where you stand before we start. No surprises, no blowouts.
The heart of the home deserves to be done right. We design and build modern, open-plan kitchens that suit how your family actually lives. On time, and on budget.
Whether it's a single room or a whole-home transformation, we renovate with care, clear timelines, and craftsmanship you can feel underfoot.
Growing family? Need a bit more room to breathe? We add space that flows naturally with your existing home, from ground-floor extensions to second-storey additions.
We're local, and we like it that way. Being close to the homes we build means we show up on time, we know the councils and the permit process, and we treat every job like it's just around the corner. Because usually, it is.
Melton, Caroline Springs, Bacchus Marsh, Taylors Hill, Hillside, Rockbank, Tarneit, Werribee, Hoppers Crossing, Williamstown and Altona.
Brunswick, Coburg, Reservoir, Preston, Epping, Broadmeadows and Pascoe Vale.
Geelong and all surrounding coastal & regional suburbs.
The best way to understand what we do is to see it. Our portfolio brings together renovations and extensions from families right across Melbourne, each one showing the suburb, the scope, the timeline and the before-and-after. Have a look. You might even spot your street.



Everything we build starts here.
We care about the experience, not just the end result. From your first consult to final handover, we keep the whole process transparent and stress-free.
We listen, we communicate, and we keep our word. Good builds start with good conversations. We pride ourselves on both.
We treat your home like our own. No shortcuts. No surprises. High-quality work, clear timelines, and a team that shows up every time.
Great people build great homes. We've built a crew of tradespeople who genuinely care about the work, and the people behind it.
Family values are the foundation of everything we do. We're a family-led business, and we build the kinds of homes we'd want our own family living in.
We're proud of the work we do. We're even prouder of what our clients
say about it.
Hear directly from a Melbourne family about their home renovation with Brendan & ONQ
"How can I express how easy my bathroom reno with ONQ was? I'd previously been ripped off and lived with no bathroom for three years. Brendan instantly put my mind at ease. His communication was spot on, I never had to chase him, and his tradies were on time and top notch. If you're searching for the best builder, look no further. I love my bathroom so much."
"After searching for almost 18 months and 9 quotes later, everything was perfect. Communication, timing and quality of works were better than expected. Mum and Dad are very happy. Thank you, Brendan."
"As this was our first renovation, I was a little apprehensive. But I couldn't be happier with the end result and the entire process. Brendan kept me well informed throughout, and the trades all turned up on time. I'll definitely be using ONQ again."
"The bathrooms needed to be salvaged from a poor renovation job. Brendan knew immediately what needed to be done. Every detail was discussed, pricing was fair and transparent, and he was accommodating to exactly what we wanted."
"ONQ delivered a fantastic outcome with full transparency, quality workmanship, and within our budget. They treated our home as their own. Rare to find tradespeople who are this genuine."
"The team's attention to detail and commitment to quality truly set them apart. The finished bathrooms look incredible and have completely transformed our home."
"Could not be happier with the service, and even happier with the cost. Brendan and his team made the entire process seamless from start to finish."
"Brendan and his team were amazing to work with. We were not disappointed. The process was easy, and on time finishing our bathroom project. We are extremely happy with the results!"
"Highly recommend Brendan and On Q Building Group to anyone looking to complete a renovation. Communication was excellent and the quality of craftsmanship was second to none."
A few of the things people like to know before they get started.
Thinking about a renovation but not quite sure where to start? That's exactly what we're here for. No pressure, no hard sell. Just a friendly ten-minute chat about your home, your ideas, and what's possible.
Give Brendan a call, or book a time that suits you. We'd love to hear what you're dreaming up.