I'm Sergio Deiana — a qualified carpenter and registered builder with over 25 years of hands-on experience. When you hire DeianaBuild, you work directly with me. No project managers. No handoffs. Just honest craftsmanship from the person whose name is on every job.
You've been thinking about this for a while. The kitchen that doesn't work anymore. The living area the kids have outgrown. The second storey you need but don't know how to get.
Then you start getting quotes. And that's when the stress begins.
Builders who won't return your calls. Quotes that don't add up. Horror stories from friends about blown budgets, endless delays, and tradespeople who vanish mid-job.
You shouldn't have to feel anxious about improving your own home.
There's no sales team. No call centre. When you pick up the phone, you're talking to me — the same person who'll design your project, walk you through approvals, and be on-site making sure every joint is tight and every detail is right.
I started as a carpenter over 25 years ago. I've spent my career learning every trade from the ground up — not from behind a desk, but on the tools, on-site, solving real problems in real homes.
Working with an existing home — respecting its bones, its character, its history — takes a different kind of builder. One who can see what a house could be, not just what it is.
Your home shouldn't look like it had an argument with an extension. We build ground floor and second storey additions that integrate seamlessly — matching materials, respecting rooflines, and creating space that feels like it was always meant to be there.
There's a reason you haven't moved. We specialise in transforming tired homes into modern, functional spaces — while keeping the charm and character that made you fall in love in the first place.
An alteration is problem-solving. Opening up a dark hallway, connecting indoor and outdoor living, giving a growing family the room they need without losing the things they love.
When you build with DeianaBuild, you work with the same builder from first sketch to final handover. No layers of management. No lost-in-translation moments.
Sergio is your single point of contact from first conversation to final walkthrough. One relationship. No middlemen. When decisions need to be made on-site, the person making them has 25 years of experience and a carpenter's eye for detail.
Your quote is detailed, transparent, and covers everything — not just the build, but the costs most builders leave for "variations" later. Fair pricing, genuine value for the quality of work you'll receive.
Renewing a home from the 1930s isn't the same as building from scratch. It requires understanding how old homes were built, how to preserve their character, and how to bring them into the modern era without losing what makes them special.
Project timelines are set before construction begins, and we hold ourselves to them. With a Registered Builder's licence behind every project, your investment is protected.
Living through a renovation is hard enough without coming home to a building site every night. Our team cleans up at the end of every single day. It's a simple standard we hold — and one our clients mention again and again.
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Sergio and Seb did our extension of a 1930s brick house — his work was of high quality and the project was completed within the agreed timeframe. Very happy with the outcome.
Local Guide · 46 reviews · 3 photos
Serge and his team did a fantastic job of building a pool pavilion for us. The quality and finish was first rate and would be very happy to use their services again.
3 reviews · 1 photo
Deiana Build — work quality and reliability were fantastic and great to deal with. I highly recommend if you want a professional and high quality builder.
12 reviews · 2 photos
I have dealt with Sergio as a Building Designer and appreciate his input during design and construction. Keep up the good work.
7 reviews
Serg is an excellent builder. He has completed an extensive but excellent renovation for me which we are enjoying. It also added significant value to my home.
6 reviews
Our complex renovation was very well executed. Could not be happier. Thanks DeianaBuild.
5 reviews
Great working with Sergio and the team. They did a great job replacing the weatherboards on my house in Ormond. Look forward to working with you guys again. Would recommend Deiana Build for any and all your building requirements.
We take the complexity out of building. Here's what to expect when you work with DeianaBuild.
Sergio comes to you. We walk through your home, listen to what you want, and give honest advice on what's possible — and what it's likely to cost.
A design that fits your home, your lifestyle, and your budget. Detailed, transparent quote — line by line.
We handle planning permits, building permits, and council submissions on your behalf.
Sergio and the team get to work. Regular updates. Every trade managed directly.
Final walkthrough, everything signed off. Covered under domestic building insurance.
Building isn't just my trade. It's what I genuinely love doing.
I take sticks, blocks, and building materials and turn them into something people are proud to call home. Whether it's a second storey addition to a weatherboard cottage or a complete renovation of a mid-century brick home, the goal is always the same: create something special that's built to last.
DeianaBuild is a family-run business. The standards aren't set by shareholders or a boardroom. They're set by me. And I put my name on every job.
Victoria's new planning reforms mean you can now build a Small Second Dwelling on your property without a planning permit. We design, approve, and build quality granny flats across the Mornington Peninsula and Melbourne's south east.
Not sure if we cover your area? Give us a call.
