What we build

Specialist Builders of Homes That Already Exist

New builds are one thing. But working with an existing home — respecting its bones, its character, its history — that takes a different kind of builder.

One Builder. Every Service.

Every service DeianaBuild offers is delivered personally by Sergio — a registered builder and qualified carpenter with 25+ years on the tools. No handoffs. No project managers. The same person who quotes your job builds your job.

Rear ground floor extension with bifold doors onto outdoor entertaining area

Ground floor & second storey

Home Extensions

Your home shouldn't look like it had an argument with an extension. We design and build additions that integrate seamlessly — matching materials, respecting rooflines, creating space that feels like it was always meant to be there.

Ground floor extensions
Second storey additions
Living area expansions
Bedroom & bathroom additions

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Renovated open-plan kitchen and living area in Melbourne home

Complete & partial home renovations

Renovations

You love the location. You love the bones. You just don't love the 1980s kitchen or the bathroom that time forgot. We specialise in transforming tired homes into modern, functional spaces — while keeping the charm that made you fall in love.

Complete home renovations
Kitchen renovations
Bathroom renovations
Heritage & period home updates

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Home extension and addition in Fairfield Melbourne

Structural alterations & room additions

Alterations & Additions

An alteration isn't just construction — it's problem-solving. It's figuring out how to open up a dark hallway, how to connect indoor and outdoor living, how to give a growing family the room they need without losing what they love.

Structural alterations
Open-plan conversions
Indoor-outdoor living
Decking, verandahs & alfresco

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Custom new home build by DeianaBuild in Melbourne

Custom builds & knockdown rebuilds

New Homes

When you build a new home with DeianaBuild, you work with the same builder from first sketch to final handover. No layers of management. No lost-in-translation moments. Just clear communication and construction that reflects exactly what you asked for.

Custom home design & build
Unit developments
Knockdown & rebuild

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Completed granny flat — modern secondary dwelling by DeianaBuild

New

Secondary dwellings under SSD provisions

Granny Flats

Victoria's new regulations let you build a second dwelling on most residential blocks without a planning permit. We handle assessment, design, permits, and construction from end to end. Rental income, family accommodation, or long-term value — whatever your goal, we build it.

No planning permit required
From 45–75m²
Full council approvals
Fixed-price contracts

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Every service. Every time.

What You Get With Every DeianaBuild Project

One point of contact

Sergio manages every trade, every decision, every update — you never chase anyone.

Transparent pricing

Detailed, line-by-line quotes. No surprise variations. No hidden costs.

6.5-yr structural warranty

Every project includes a structural warranty as required by the Domestic Building Contracts Act.

Daily site clean

Our team leaves the site clean at the end of every working day. Simple standard, huge difference.