WHAT WE DO

4305 design is a building design studio specialising in high-performance and off-grid custom homes for South East Queensland.

OUR VISION

Our visions is to see building design used as a solution to global warming.

OUR MISSION

Our mission is to see a satisfied client's building design brief being constructed without costing the earth.

Sustainable Home Designs
resilient design - 4305 design sustainable homes and renovations building design
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energy efficient home design

our process

At 4305 Design, our approach is both collaborative and educational, ensuring you feel confident and informed every step of the way. Our intent is not just to design but to empower. From your initial dream to the completed project, we guide you through the journey with experience and care.

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  • Collaboration is Core

    We believe the best designs emerge from strong partnerships. By working closely with you, we define clear project goals, aligning your vision with practical solutions. 

  • A Streamlined Process

    From concept to construction, we aim for a smooth, stress-free experience. By involving all stakeholders from the beginning — clients, consultants, and builders, we help ensure that both the approval and quote phase proceed without unnessesary rework or delays.

  • Why Choose Us?

    With a focus on clarity, communication, and sustainability, we ensure every detail is thoughtfully considered, resulting in a home that is as functional as it is beautiful.

ready to learn more?

Book a consult

Book an onsite consult to discuss your ideas, the design and approvals process, what costs can be anticipated, and to get some advice on your scope of works
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Our team

  • sustainable building designer south east queensland

    Esther James

    Esther James is a QBCC licensed building designer with a dedication to sustainability in the built environment. You will find her passionate about creating homes that not only meet your needs but also exceed your expectations. Since 2017 she has been working closely with homeowners, landholders and custom builders to provide advice, collaboration and education on designs that respect our culture, our history and our environment. 

    4305 design offers a range of experience including custom homes, retrofit upgrades, raise & build-in projects, renovations and extensions. Esther’s designs are recognised for their innovation and sustainability with awards such as Winner of Regional Sustainable Residential Design and Winner of State Sustainable Building Design, Winner of National Secondary Dwelling Design.

  • building designer south east queensland

    Franklin Alfred

    Franklin Alfred is the Chief Morale Officer at 4305 design. This furry bundle of good-boi has been spreading happiness since 2018 with his infectious smile and happy tail. He has a sharp nose for interesting smells and a keen ear for rustling leaves, making him an expert at finding new opportunities and potential distractions.


    But Franklin’s true talent lies in his time management skills. He knows just what we need to stay productive and focused and reminds us when it’s time to take a break and recharge, whether it’s for a quick game of tug or a relaxing nap on your toes.

Andrew and Suzanne Carlisle
Sustainability is what lights Esther up and is the passion of 4305 design. She provided expert advice including passive design principles as she crafted our...Read More »
Rebecca Frost
We have had an incredible experience designing the large scale renovation of our 80's house and transforming it into a beautiful, modern home achieving an...Read More »
Erin Pearl
My husband and I worked with Esther on designing our renovation for our home. She did a great job of drawing our vision for our...Read More »
christine turner
Dealing with Ester was very easy and enjoyable experience. Esther was passionate about our project and was able to come up with a design that...Read More »
Taeben Davis
Esther is a very knowledgeable and creative designer. I found that she was able to seamlessly integrate sustainable design principles with the functional and budgetary...Read More »