Your build.
Our reputation.
Delivering excellence.
At the heart of Radius Building is a promise: to build homes that reflect not only architectural and craftsman excellence, but also the people who will live in them. Led by Richard Fantham, a master builder and former Army officer, Radius Building operates with military-inspired strategy & planning, implementation and communication.
As a family-run business that builds only a handful of homes each year, each one crafted with unwavering focus & care by Team Radius. These aren’t just projects; they’re personal commitments. Strong relationships, deep trust, and seamless communication are the foundation of everything we do.
Choosing the right builder
Experience matters. Architectural homes demand a builder with proven discipline, clear communication, and uncompromising quality standards. The best outcomes come from choosing skill and process over price—partnering with a team that anticipates challenges early and delivers a home that stands the test of time.
Collaboration with leading architects & suppliers
Exceptional homes are built on strong partnerships. We work closely with Christchurch’s leading architects, designers, engineers, and supply merchants to ensure every decision supports the design intent. This collaboration brings clarity, efficiency, and consistency—resulting in a smoother build and a superior finish.
Craftsmanship & material integrity
Craftsmanship is at the heart of every Radius project. We help clients select materials with purpose and engage tradespeople who share our commitment to precision and longevity. From structure to finishing detail, every element is executed to the highest standard, ensuring your home performs beautifully for decades.
Smart homes & healthy homes
Modern homes must be both intelligent and healthy. We integrate smart-home systems that enhance comfort and ease of living, while applying proven building science to support air quality, thermal performance, and long-term wellbeing. The result is a home that feels effortless, efficient, and built for healthier living.
The right time to engage a builder
The greatest value is created when we’re involved from the very beginning. Early engagement allows us to assess section suitability, advise on design efficiency, guide cost structures, and shape a sound construction strategy. Whether it's a steep hill site, urban architectural home, complex renovation, or one-off project, our early insights help avoid pitfalls and unlock opportunities. With full design collaboration, project management, and high-quality delivery, we ensure your project is set up for success long before building begins.
Our team.
Our dedicated team combines expertise and passion to create exceptional homes tailored to your needs.
Richard Fantham, company director and project manager, leads the team at Radius Building.
Michele Fantham, company director and office manager, attends to contractual, administrative and financial matters at Radius Building.
With over 19 Years building experience Garry has accumulated a wealth of knowledge in the architectural building space and uses those skills to ensure his team’s projects are completed on time and to the highest standard.
Build with industry backed confidence.
Radius Building are members of Registered Master Builders. Our membership brings real benefits to you, offering building contract and guarantee options. It’s part of our culture and philosophy of putting clients’ needs first that extends to everything we do.
Bringing your vision to life.
For many, building a home is uncharted territory – full of excitement, but also uncertainty. That’s why our process is designed to feel intuitive, transparent, and deeply collaborative. We begin with understanding: your lifestyle, your goals, your site, and your budget.
From there, we help shape a vision – whether you’re working with your own architect or engaging one of our trusted partners. Every step is considered, from consents to cost management to craftsmanship. But we never lose sight of the emotional journey – the anticipation, the decisions, the pride.
Crafted to endure.
Designed for life.
No two families are the same – so no two homes should be either. Our showcase represents more than construction; it’s a collection of personal journeys.
‘I am always impressed with Richard’s ability to listen and talk through solutions to problems. He’s definitely a builder who’s committed to the best results. He does what he says he will and has a strong moral integrity.’
Let's build your dream home.
Contact us today to schedule your personalised consultation and start your journey to a new home.