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Builder-led Projects with On-site Involvement
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Transparent Quoting & Cost Breakdowns
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Award-nominated Craftsmanship (MBA Nominee 2023, 2024 & 2025)
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End-to-end Project Management
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Strong Network of Architects & Interior Designers
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Support with Planning & Building Permits
Whether you’re adding a second storey, reworking your home’s layout, or creating more space to suit a growing family, Blue Diamond Building and Construction brings the expertise and systems needed to deliver smooth, successful extensions.
We understand the complexity of working with existing homes. Our experienced team knows how to manage and stage builds efficiently, ensuring the transition between old and new is both seamless and structurally sound. We’ve completed everything from second storey additions, contemporary rear extensions, libraries, indoor/outdoor living and entertaining areas, to pool houses—each tailored to suit the home and the people who live in it.
From navigating planning permits and protection works to coordinating trusted trades and working closely with your designer, we’re here to take the stress out of extending. With the added benefit of our in-house interior designer, we help ensure your new space not only looks great but also functions beautifully for everyday living.
Our proven, collaborative process ensures your vision is at the heart of the project. With over 25 years of building experience and a nomination from Master Builders Victoria, our team is committed to delivering exceptional quality and craftsmanship. We manage every aspect of the build, from initial designs and council permits to construction and final handover, maintaining clear and transparent communication with you at every stage.
Let’s work together to expand your home and enhance your lifestyle. We offer a personalised service, transparent quoting, and a commitment to completing your project on time and on budget. Trust our expert team to guide you through the process, transforming your home with a beautiful, functional, and seamlessly integrated custom extension. Contact us today to start the conversation about your home extension project.
10 Must-Know Tips Before You Build, Renovate or Extend
What Every Homeowner Should Know Before They Build, Renovate or Extend


This award honours members of the building and construction industry who exemplify outstanding craftsmanship, unwavering dedication to building excellence, and a steadfast commitment to upholding the professional standards of Master Builder Victoria.

