CASE STUDY: Project 124 – A Three‑Level Architectural Home on a Steep Riverfront Site
Introduction
Project 124 is a standout example of how a highly constrained riverfront site can be transformed into a refined, architecturally ambitious home. With a 9.2‑metre fall, zero side access, and no practical front access, this project demanded precise engineering, advanced planning and a collaborative approach to deliver a three‑level residence that feels effortless, grounded and deeply connected to its riverfront setting.
Through meticulous construction management, innovative problem‑solving and a strong partnership with The Artificial, the result is a home that balances architectural beauty with structural intelligence — a landmark build shaped by one of the most challenging sites we’ve worked on.
A Collaborative, Aligned Process
Project 124 began with a clear architectural vision created by The Artificial. Our involvement commenced in the pre‑construction phase, where we provided preliminary estimating, constructability advice, and early‑stage planning to ensure the design could be delivered safely and efficiently on a steep, access‑restricted site.
This collaboration continued into construction, where open communication, coordinated problem‑solving and detailed sequencing allowed us to execute the design with precision. While The Artificial led the design, our role was to ensure it was built to the highest standard within the constraints of the site
Engineering the Site: Steep Fall, No Access, Full Complexity
The site conditions shaped every decision and required a construction strategy built around precision and sequencing.
Key challenges included:
9.2m fall from front to rear
Zero side access due to neighbouring boundaries
No usable front access for machinery or materials
Riverfront exposure requiring careful environmental planning
To overcome these constraints, the team implemented:
Advanced cranage operations to move materials into position
Staged excavation and retaining systems to stabilise the steep terrain
Custom structural steel solutions to support the three‑level design
Integrated waterproofing and drainage systems across all levels
Every stage required detailed planning and coordination, ensuring the build progressed safely and efficiently on a site where traditional methods simply weren’t possible.
Building Up: Three Levels of Refined Architectural Living
The architectural vision centred on creating a home that feels anchored to the landscape while opening up to the river with elevated living spaces and refined detailing.
The three‑level design includes:
Expansive upper‑level living zones
Carefully framed river views
A refined material palette
Seamless indoor–outdoor transitions
High‑performance thermal and acoustic detailing
The structure was engineered to deliver both durability and elegance, ensuring the home performs as beautifully as it looks.
Rooftop Gardens: Elevated Green Spaces with Real Performance Benefits
Two rooftop gardens are among the defining features of Project 124, each designed to enhance both the home’s aesthetics and its performance.
These include:
A private rooftop retreat adjoining the master suite
A larger communal rooftop garden for elevated outdoor living
Beyond their visual impact, the gardens provide:
Improved thermal regulation
Reduced heat load on upper levels
Enhanced acoustic buffering
Increased biodiversity
A unique architectural identity rarely seen in residential construction
These spaces elevate the home’s liveability while contributing to its long‑term performance
The Result
Project 124 stands as a testament to what can be achieved when architectural ambition, engineering precision and collaborative teamwork come together. The home now spans three beautifully resolved levels, integrating structure, landscape and design into a cohesive riverfront residence.
Despite the steep terrain and extreme access limitations, the final outcome is a refined, high‑performing home that feels calm, grounded and effortlessly connected to its surroundings.
Client Testimonial
“We recently built our home in East Brisbane with Allen Brothers and couldn’t be happier with the outcome.
From the outset, Fraser and Kurt were transparent, honest, and great to work with. Their communication gave us confidence throughout, and it’s clear they take real pride in their work.
A standout for us was how thorough they were during the initial pricing phase. They took the time to properly understand and allow for each element of the build, drawing on their experience and data to rationalise costs. This meant there were no unexpected costs or variations, which is rare and made the process far less stressful.
The quality of the build is exceptional, with a high level of detail throughout. Our site was challenging, steep, restricted block but it was managed extremely well through careful planning and coordination of trades and deliveries.
Their use of Buildertrend was also excellent. Having access to daily updates, photos, and reports provided great transparency and kept us informed at all times.
All of their staff and trades were friendly, professional, and easy to deal with, which made the experience even better.
Overall, their professionalism, attention to detail, and pride in their work really set them apart. We would highly recommend Allen Brothers to anyone looking for a high-quality builder, especially for more complex projects.”— David
Credits:
Building Desing: The Artificial
Landscape Design: LARC
Interior Design: Borgeaud Interiors
Photography: Cathrine Schusler