We bring technical expertise, practical insight and early design coordination to help move projects from concept to completion, using modern methods of construction (MMC).

Project drivers for modular design and prefabrication

Speed to market

Program appreciation is key. Successful design, manufacture and installation require that the entire project team understand the sequence and technical detail early. Processes should focus on early lock down of design, layout materials and supplier selection; early sequencing; and close collaboration across disciplines.

Quality

These projects are built on tight construction tolerances that require careful coordination. Our engineers use digital models, clash detection and integrated design tools to carefully detail services, penetrations and interfaces, resulting in a higher quality end product. We use these alongside stringent prototype design reviews, including full-scale 3D mock ups, models and projections.

Construction efficiency

Structures and prefabricated modules must interface seamlessly. Every joint and connection needs to be coordinated with input from all services and project partners.

We focus on constructability, enabling this through technologies such as press-fit piping systems, plug-and-play modular wiring and use of standardised components.

Predictability

Prefabrication reduces onsite labour and material waste while minimising rework and increasing safety. It also limits disruption to the community and surrounding trades.

Through early design integration and standard component systems, we aim to deliver greater cost certainty from smarter, more predictable construction.

Why choose NDY for modular building design?

We help deliver certainty, quality and efficiency by integrating design with prefabricated elements, including mechanical, fire, electrical and hydraulic services.

Where we add value

We understand how to plan, design and coordinate engineering solutions for off-site manufacture and assembly.

Strategy and design clarity

We engage early to define sequencing, interfaces, tolerances and finite design detailing.

Technical expertise

We design and coordinate with accuracy so individual elements can be built, transported and installed efficiently.

Vendor engagement

We work with suppliers to align proven standardised components and connection systems with project needs, rather than prescribing variable or bespoke designs.

Interface leadership

We collaborate across the entire project team to bring optimum coordination across design.

Constructability, health, safety

We prioritise safer builds by reducing site hours, congestion, risk and exposure to weather as well as improved ergonomics of the working environment for system assembly.

Modular solutions we enable

  • Multi-service risers and corridor services modules
  • Prefabricated plant skids and packaged plantrooms
  • Pre-assembled electrical boards and control bundles
  • Bathroom, kitchen and service fixture kits for repeated layouts
  • Vertical drainage stacks and horizontal drainage runs
  • Plug-and-play connection systems designed for seamless installation.

Our process: from design to delivery

  • Inception workshops – aligning client goals, constraints and prefabrication opportunities
  • Supply chain involvement – before procurement – to enable component and materials preselection
  • Decision matrix – defining what should be prefabricated, why, and to what level
  • Design freeze gates – locking in critical dimensions and layouts across multiple floors, where possible, to enable production ahead of construction
  • Coordinated BIM models – integrating disciplines to manage tolerance, safety and compliance
  • Factory engagement – reviewing shop drawings and attending FAT/SATs to ensure quality of prototype prior to main production run for multiple modules.

Why clients choose us

  • Proven design frameworks developed through decades of design experience
  • Extensive technical capability across all building services, disciplines and associated specialisms
  • Collaborative approach that unites design intent, technical accuracy and construction efficiency
  • Backed by the scale and resources of our parent company, Tetra Tech.

Our specialist services for modular design

We deliver integrated design solutions across core services and specialist disciplines.

The specialisms detailed here are particularly critical to the success of modular buildings and prefabrication.

Fire engineering

A significant challenge for multi-storey modular buildings is achieving compliant fire separation and structural fire ratings. In Australia, this needs a fire-engineered approach.

Our team develops holistic fire strategies and performance-based solutions, collaborating with the design and delivery team, passive fire system suppliers, architects and fire-test labs that enable prefabrication.

We guide projects through testing and approvals, ensuring compliance without compromising design intent.

Digital

Digital coordination is at the heart of modular delivery. Using 3D models, BIM, clash detection and real-time collaboration platforms, we enable precision design, effective integration and streamlined approvals.

Sustainability

We provide early strategic advice on how modular systems can contribute to sustainability goals, ensuring sustainability is embedded from concept through to fabrication and operations.

Factory-controlled environments enable precise material use, reduced waste, shorter build times and healthier working conditions. These impacts lower embodied carbon and environmental impact across the entire project lifecycle.

We help clients quantify these gains and integrate sustainability into every design decision.

Modular design project insights

Early planning

On a major healthcare project, the project team worked with the design intent for prefabrication from the outset, essential on a site with no laydown space.

Prefabricated service modules were delivered and installed within hours of arrival, demonstrating exceptional construction efficiency and control. This approach reduced labour on-site to a peak of just 8 people, minimising disruption, safety risks and community impacts while maintaining quality and programme certainty.

Upfront design coordination

At a major airport, the project team delivered prefabricated multi-service modules along gate lounge walkways, a complex environment demanding precision, coordination and minimal disruption.

By designing 30-metre integrated service modules that were fully fitted, tested and pre-commissioned off site, the team achieved seamless installation within a live terminal, demonstrating how early design integration and manufacturing certainty can accelerate delivery and reduce on-site risk.

Efficiency

Corridor modules can often be prefabricated in long, repeatable sections with only intersection-zone fit-offs completed onsite.

By prefabricating around predictable lengths and installing crossovers onsite, up to 90 per cent of corridor services can be installed offsite, improving speed, quality and safety. High-risk areas are still able to be measured onsite.

Speed

We were involved in a private healthcare project on a tight site in a residential area where full design took 6 months and a 3-storey theatre block was installed over a weekend. A further 3-4 months were taken for the internal fit-out but the overall program gain was significant.

This example shows success front-loading design effort for program gain.

Precision as a priority

Across several correctional facilities, we’ve supported the design and delivery of modular cell blocks constructed from steel-framed, concrete-floor modules. These projects highlighted the importance of precise construction tolerances, early coordination and clear sequencing between modular works.

Our experience showed that managing temporary weather protection and planning for limited post-installation modification, particularly around fire-rated separations, are critical to maintaining quality, safety and program certainty.

Strategic fire safety

We’ve been involved in developing fire strategies to enable a range of modular and prefabricated buildings. Fire safety compliance is often a key challenge and we address this by developing a highly bespoke and holistic fire strategy that can accomodate modular construction with fewer regulatory barriers.

Recent projects include a:

  • 5-storey modular office building
  • 2-storey modular accommodation prototype building
  • Prefabricated plant room.

For a large office scheme, the rooftop plant was installed, tested and commissioned offsite, improving construction time and reducing risk. Onsite connections were made in hours, not days.

Prototype testing

Where multiple repeat-prefabricated modules are planned, it’s important to design detail, inspection and defect of the prototype module to a finite level, prior to instigating the main production run.
This avoids significant re-works and sets the benchmark for onsite quality once delivered.

It was critical to not rely solely on shop drawings to successfully roll out hundreds of left and right-hand versions
of the same en-suite bathroom pod module.

Get in touch with our team

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Ben Moulton
Director & Corrections & Justice Market Sector Lead
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Ashley Merrett
Director