Healthy buildings that don’t cost the Earth.

Net Zero Design is a Brisbane-based sustainable building design and consulting practice for home renovations and extensions, new homes and community projects across Queensland, New South Wales and beyond. We work with you, your builder and key consultants from early design, so your project is practical to build and designed to your budget.

Holistic sustainability

Practical
sustainability

Passive solar design, efficient use of space and durable materials, for lower running costs and impact over the building's whole life.

Healthy living

Healthy
living

Clean air, natural materials and year-round comfort, with a close connection to nature and low risk of mould and condensation.

Modular design

Modular
design

Flexible, space-efficient system to fit your site, budget and future needs. Easy to extend as your life changes over time.

Projects


To date our projects have included residential renovations/extensions, new custom homes, education- and master planning projects. We welcome collaboration and are open to any project that aligns with out values and philosophy. Explore some examples here:

What our clients and collaborators say

“Christina is not just fully informed of all matters to do with green design and building. She is pioneering new ground in that field. As a professional she is flawless in attention to detail and highly capable at cooperating with other professionals in this arena. For a client she is very personable and flexible to work with. She erects no barriers to input and provides all the information a client could possibly want. She is patient with obstructions but also determined in dealing with them. She has a responsible, ethical commitment to practical action to save our earth. I fully recommend her as a partner to both clients and others working in this field.”

— Greg, Tallowood Ridge Residence Client

“Christina’s designs illustrate genuine commitment to building homes that embrace many important sustainability principles and care about the future of the people who will live in them as well as the planet as a whole. She is both friendly to work with and also delivers plans with attention to construction details that really count when it comes to construction of low emission buildings. Christina uses modern technology and digital modelling to produce quality building designs that reflect clients aspirations for environmentally sustainable homes. We are happy to continue working with her into the future to achieve these goals..”

— Ecobuilding and Design

“Net Zero Design articulated what our vision was and made our front facade and deck extension visually tangible. It was also great to have a firm take into considerations our personal hopes for healthy and sustainable considerations.”

— Bryan & Michaela, Aspley Residence Clients

Working with Christina was easy, we felt that we were part of the design team. Christina's communication was always clear, as were her explanations around legislation. Christina made it easy, she aligned all the materials and contractor meetings around us. We couldn’t have asked for a more passionate person to help us design our dream home.

— Adam & Belinda, Wavell Heights Residence Clients

Christina Renger_square.jpg

Christina Renger, Founder / Principal Net Zero Design
Dipl.-Ing. Arch (FH) I M. Arch (QUT) I Associate RAIA

Services

We provide sustainable building design and consulting services for home renovations and extensions, new buildings of any type and urban design/ master planning projects. Based on 20+ years experience with leading architecture firms and at Net Zero Design, we aim at the highest design- and build quality through key principles such as:

  • Passive solar design & thermal comfort

  • Efficient use of space, materials & technology

  • Flexibility & adaptability

  • Indoor-outdoor & nature connection

  • Natural, durable, chemical-free materials,

    responsibly and ethically sourced

  • Minimised risk for condensation / mould

  • Whole-of-life approach beyond energy / carbon

  • Reuse, recycling and/or biodegradability

Our approach is to create more with less by integrating these principles in early design collaboration to achieve outstanding results for your project. We are committed to improving housing affordability, supporting local production and contributing to long-term solutions that increase climate resilience and regenerate Australia’s unique biodiversity.
We are based in Queensland and have experience in other states. If you feel you are likeminded, we would love to hear from you.

Are you keen to explore sustainable design strategies for your project? We offer a free, no-obligation 30-min. online meeting to see how we can work together. Just fill out a few details and book a time.