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Name
About Stackcell Structures — Building Concrete Homes Engineered To Outlast Us All
Brandon O'Reilly- Owner/Director
Brandon O'Reilly is the Founder and Director of Stackcell Structures, the Auckland-based construction company behind an in-situ concrete structure system designed to make residential construction faster, more efficient and built for the long term. With a background spanning construction management, civil engineering and heavy commercial construction, Brandon has spent his career looking at how buildings are actually delivered on site - and where time, materials and money are lost along the way.
For seven years, he has been developing and refining Stackcell across New Zealand, applying the lessons learned from more than 1500 apartments and projects ranging from two-storey terraces to 12-storey high-rises. His focus is straightforward: build better, reduce waste, improve productivity and create concrete homes capable of lasting for generations.
We soon figured out, it wasn't just a wall system! - it was a Full Structure System!
Imagine homes built to stand strong for 200-500 years instead of just 70! Picture a future where we plan 200 years ahead, not just 10. What will our Children's ,Children say of us?
That’s the vision driving us forward.
We are leading a revolution in apartment construction, pioneering cutting-edge in-situ concrete techniques tailored to meet New Zealand’s unique seismic and flooding needs.
Our innovative approach eliminates 30% of the waste traditionally associated with building, creating a more efficient and sustainable process.
Over the past seven years, we’ve refined this system through collaboration with top structural engineers. It has been successfully implemented across a diverse range of developments—from two-Storey terraces to towering 12-storey Highrise apartments delivering 750 apartments and counting.
Each project we complete is a testament to our commitment to excellence, efficiency, and a bold new future for construction.
Brandon O'Reilly - from the coalface in Africa to the high-rises of Auckland
Brandon cut his teeth in heavy commercial construction in South Africa, specialising in concrete and steel. With a degree in Construction Management and Civil Engineering, he worked the tools and the trenches early on - and still does today.
That grounding followed him to New Zealand through major residential and commercial builds. It also led to a chance encounter that made headlines: while working on Auckland Zoo's native wildlife precinct, one of the zoo's cheetahs took a shine to him, as reported by the NZ Herald - fitting, given his family's long history with big cats in southern Africa.
On the delivery side of large residential projects, Brandon crossed paths with structural engineer and developer Shane Brealey. Combining Brandon's construction-management background with Brealey's engineering approach, the two set out to fix what the industry had accepted for too long: slow builds, heavy waste, short lifespans.
That collaboration became the in-situ concrete system now known as Stackcell.
In 2019, Brandon founded Stackcell Structures with his wife, Michelle O'Reilly.
It Started As A Wall System. It Turned Out To Be A Full Structure System.
Stackcell uses one structural product - concrete - to do what timber, steel, precast and block usually split across trades. A monolithic pour forms a watertight box, so fit-out can start once the second floor is poured, rather than waiting for the whole shell.
BRANZ's independent coverage of the "stack cell" method notes it delivers fire rating, bracing, structural and acoustic performance in one pass, at roughly half the cost of orthodox apartment builds - around 2.5 days per unit.
The approach also strips out an estimated 30% of typical construction waste, with concrete pours, Gib deliveries and kitchens locked in and booked months ahead. It's scaled from two-storey terraces to 12-storey high-rises using the same core system.
- 30% less waste
- Watertight 2 floors below the leading edge
- 1 product handles fire, bracing, structure and acoustics
- 12 storeys, tallest built to date
Actions speak louder than words!
Our Company Drivers:
- Helpful: Help developers see where their projects lose efficiency.
- Explain: Show the real benefits of a solid concrete home in NZ conditions.
- Upskill: IP is free to any developer who wants to replicate the model and help ease the housing shortage.
- Innovate: Always looking for waste, always finding a more efficient way to work.
Projects
Sound Living, Hargest Terrace - 51 Apartments
134 working days to structure complete · 189 days full completion · 3.7 days/apartment
Same materials every builder uses - the difference was the programme.
Full Sound Living case study
Simplicity Living, Te Reiputa, Mt Wellington - 297 Apartments, 5 Buildings
295 working days, first slab to last pour · 0.99 days/apartment
Block C alone: 66 apartments, 6 storeys, 140 working days, 18 carpenters.
Full Simplicity Living case study
Media
Mitchell Vranjies and CLL Piling showcase a 12 Storey building,
BRANZ Article - A Simple Build System:- Independent write-up of the method and the numbers behind it: Read the BRANZ article
Building Pulse Podcast Brandon O'Reilly:- A look at the Stackcell system in action: Watch the Podcast
NZ Herald - Cheetah's Affections For Builder No Lick-And-Tell Affair:- The unexpected Auckland Zoo encounter that made headlines: Read the NZ Herald article
LinkedIn:- Career history and project updates.
Instagram - @stackcell_structures:- Site photos and pour-day progress.
Building A Development And Want It Done Right The First Time?
If you're weighing up structural systems, or want to know how Stackcell works on your site, get in touch directly.
All the Components are made in New Zealand.
All plastic components that are not used are sent back to our Hamilton Manufacturer or a Waste Service. where they grind and melt back down and manufacture the same product again. Full circle recycling!
The 9mm Formply is brought in from overseas, as no current mill in New Zealand can provide the same quality or pricepoint. Work in progress!
Concrete Homes To Last 100's of years +
The art of constructing mid to high rise apartment buildings in reinforced concrete.
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Stackcell Structures Limited 2019 & beyond - ALL RIGHTS RESERVED -Level 8, 139 Quay Street, Auckland, New Zealand 1010 TEL:+6421514555