DEMK CONSTRUCTIONSÂ HOME EXTENSIONS
Home extensions for more space, better flow and everyday comfort
We expand your home to create more room, improve how each area connects and make better use of the space you already have.
DEMK delivers home extensions across Melbourne, designed around your existing home, site conditions and future needs. From additional bedrooms and larger living areas to improved kitchen layouts and stronger indoor-outdoor connections, each extension is planned to work naturally with the original home.
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Design, engineering, permits and construction are coordinated as one project, helping keep decisions, documentation and delivery clear from the early planning stages through to completion.
Types of home extensions
Extension options designed around your home
Ground Floor Extensions
Create larger kitchens, living areas and stronger indoor–outdoor connections.
Second Storey Extensions
Add bedrooms, bathrooms or private living spaces while retaining more of your backyard.
Rear Extensions
Expand the back of your home to create brighter, more functional family living areas.
Renovate and extend, or knock down and rebuild?
The right approach starts with understanding both the condition of the existing home and how well it works for you now. We look at the structure of the home as well as the way the spaces function including storage, natural light, room sizes, circulation, layout and how different areas connect. We also take into account what you would like to improve, add or change.
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Older properties can come with structural movement, deteriorated framing, outdated services, moisture issues or previous alterations that make a major renovation more complex. In some cases, repairing and upgrading these elements one by one may be less practical than rebuilding. Heritage controls can also influence what can be retained, altered or extended, and may require a more considered renovation and extension approach.
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By combining what we see in the existing home with your priorities for the project, DEMK can recommend a building solution that makes sense for the property — whether that means reworking the existing layout, extending, undertaking a major renovation or considering a knockdown rebuild.
Registered and insured
Your extension is carried out by a registered Victorian builder with the required insurance and protections in place.
Why you’ll love working with DEMK
Existing home expertise
We consider the existing structure, levels, rooflines, services and layout so the new work integrates naturally with your home.
Planned from the start
Design, engineering, approvals and construction are coordinated early so key decisions are resolved before work begins.
Aftercare Support
Our support continues after handover, with a 3-month cosmetic defect period and 7-year structural warranty for added peace of mind.
Our ProjectsÂ
Heritage home extension and restoration, Moonee Ponds
Rectification, internal renovation and double-storey rear extension, Gladstone Street, Moonee Ponds
We check the details as your extension takes shape
Regular site supervision and quality checks at key stages help ensure consistency with approved plans, specifications and required construction standards.
Make space for a dedicated home office
We create home offices that feel good to work in — comfortable, well planned and tailored to your needs. DEMK considers light, privacy, storage and layout from the early planning stage to help create a workspace you’ll enjoy using every day.
What affects the cost of a home extension?
The cost of a home extension depends on more than its size. Existing structure, site access, structural changes, floor levels, services, drainage, permits and your choice of finishes can all influence the final cost.
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DEMK reviews these factors early, clearly outlines the scope and key cost drivers, and can provide priced options where appropriate to give you greater transparency before the project moves forward.