Custom Architectural Additions.

HDMB are the authority on transforming your early century house into a
bespoke modern home for you, your family, for generations to come.

Sydney’s Inner West, Eastern Suburbs and Lower North Shore.


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7 things you must know before designing a new home

In this free guide you’ll discover exactly what you must know to ensure you end up with your family’s dream home, and a stress-free building experience.

extensions and first floor additions specialist.

When it comes to extensions and first-floor additions in Sydney’s Inner West, Eastern Suburbs and Lower North Shore, HDMB stands head and shoulders above the rest, making us the best choice for transforming your home into a stunning space which seamlessly blends the old with the new.

Our niche specialty lies in extensions and additions to local period homes, a skill that has earned us a reputation as the local experts in this field.

our projects.

what our clients say.

why choose hdmb for your architectural addition?


Our Commitment to Excellence

We pride ourselves on the quality of our service, our specialist trades, our processes, and our finishes.


A Client Portal Like No Other

Of all our systems, the transparency and accountability that the portal provides our clients is the most valued.



We allocate time to ensure the work site is clean, materials are protected, and work areas are safe and productive.


Our Values

Our team are our family, and your home is our home. We take pride in our work and strive to deliver what we promise.


Customer Service

HDMB take the ‘client first’ approach to your project. Constant communication from start to finish is important to us.


Quality Control

HDMB follow a structured building process developed from a lifetime of experience.

Since 2017 we’ve helped over 30 local families transform their homes and improve their quality of life.


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