Understanding Core, Cat A and Cat B Fit Outs – all you need to know... 

In the world of office design, understanding the differences between Shell and Core, Cat A and Cat B fit outs is essential for businesses looking to create efficient, functional and beautiful workspaces. These different types of fit outs play distinct roles in transforming a old building into an operational workspace that meets the unique needs of your brand.

Core Fit Out?

Think of a Core Fit (also known as Shell and Core) as the strong, weatherproof “blank frame” of a building. At this stage, the space has all the essential bones in place but none of the finishing touches, it’s ready to be transformed.

You’ll find:

• Concrete and metal framework

• External and structural elements

• Core building utilities like plumbing, drainage and electricity supply

• Bare structural floors and walls

• Weatherproofing

A Core Fit provides maximum flexibility, creating a solid base that can be adapted to suit any future design or layout.

Cat-A Fit Out?

A Cat A Fit Out takes the bare frame of a Core Fit and makes it functional and move-in ready but still leaves plenty of room for personalisation. It’s the stage where the essentials are installed, so you can bring your own brand and style to life.

This includes:

• Basic lighting and air conditioning

• Electrical points, plumbing connections and fire detection systems

• Raised access flooring with basic floor finishes

• Suspended ceilings with lighting

• Basic wall finishes

• Toilet facilities

A Cat A fit out turns the building from a skeleton into a fully working “blank canvas” ready for you to make it your own.

Cat-A+ Fit Out?

A Cat A+ Fit Out, sometimes called “Plug and Play”, is the sweet spot between a basic Cat A space and a fully customised Cat B. It’s for businesses who want to move in and get going, without the time and cost of a full design-and-build process.

Think of it as an office that’s already set up with the essentials, so your team can start working from day one.

You’ll typically find:

• Meeting rooms and collaborative spaces

• Basic furniture and workstations

• IT infrastructure such as network cabling and power

• Kitchens or breakout areas

• Power and lighting systems

With finished ceilings, flooring, partitions and ready-to-use facilities, a Cat A+ fit out removes the hassle of sourcing furniture or installing tech. While it’s functional and polished, it still leaves room for you to inject your own branding and personality, making it an ideal fast-track option for getting your business up and running.

Cat-B Fit Out?

A Cat B Fit Out is where your office truly comes to life. This is the final stage of the transformation, when the space is tailored to your exact needs, style and brand turning a functional office into a place that feels like home for your team and inspiring for your clients.

Here’s what’s typically included:

• Bespoke partitions and internal walls to create offices, meeting rooms, and breakout areas

• Premium floor finishes such as carpets, tiles, or wood

• Specialist lighting for different zones - from focused task lighting to mood lighting

• Bespoke furniture and fixtures

• Fully equipped kitchens and café areas

• Branding elements like logos, artwork, plants and wall finishes

A Cat B fit out blends functionality with personality, combining the practical features you need with the design details that make your space memorable. It’s about creating a fully operational, branded environment that reflects your culture, supports your way of working, and makes the right impression from the moment someone walks in.

Why Choose a Cat A or Cat B Fit Out?

When choosing between your fit out, it’s essential to understand the business's needs and priorities.

Factors to Consider When Choosing a Fit Out:

• Cost: A Cat A fit out is typically more affordable and quicker to complete than a Cat B fit out, which involves more customisation. 

• Time: If a business needs to move into a space quickly, a Cat A+ fit out may be a good choice, as it offers a near-ready office that requires minimal adjustments. 

• Branding and Customisation: If a business wants to reflect its unique brand identity and create a space that aligns with its values, a Cat B fit out is the way to go.  

  
  

Conclusion

By understanding these stages, businesses can make informed decisions about the right fit out for their needs and create a workspace that fosters productivity, collaboration and success. 

Need advice on your office fit-out?

Get in touch with us today to explore how we can assist you in designing a space that works for your team and reflects your brand.  Whatever you’re looking for, we can support you at every stage.