The Difference Between Cat A and Cat B Fit-Out - Denton

What is a Cat A and Cat B Fit-Out?

In the realm of office fit-outs, there are several categories, each offering a distinct level of customisation and finishing. Let’s delve into the different types of fit-out services: Shell and Core, Cat A, Cat A+, and Cat B.

1. Shell and Core: The Blank Canvas The “Shell and Core” fit-out is akin to starting with a blank canvas. In this minimalistic approach, the focus is primarily on the basic structure and services of the office space. This includes essentials like the exterior facade, structural framework, and the core services such as HVAC, plumbing, and electrical systems. A Shell and Core fit-out provides the most fundamental elements, allowing tenants to have complete control over the interior design and customisation.

2. Category A (Cat A): Essential Infrastructure Cat A fit-out takes things a step further by providing essential interior elements on top of the basic structure. This level of fit-out typically includes raised floors, suspended ceilings, basic lighting, and finished common areas such as lobbies and restrooms. Cat A provides a functional and presentable workspace, making it suitable for businesses looking to move into a new space quickly without the need for extensive customisation.

3. Category A+ (Cat A+): Enhanced Aesthetics and Comfort Cat A+ fit-out offers all the amenities of a Cat A fit-out, with the addition of enhanced aesthetics and comfort. This includes higher-quality finishes, better lighting options, and possibly some level of partitioning to create distinct zones within the office. Cat A+ fit-outs are ideal for businesses that want a balance between a professional appearance and the flexibility to add some personal touches. Explore our full guide to category A office fit-outs.

4. Category B (Cat B): Tailored to Your Brand When you’re seeking a fit-out that aligns your office space with your brand identity and specific requirements, Cat B fit-out is the answer. Cat B involves a fully customised interior, including partitioning to create individual workspaces, meeting rooms, breakout areas, and any special installations unique to your company’s needs. This level of fit-out offers the highest degree of personalisation and is suitable for businesses that want a workspace that truly reflects their culture.

Exploring Features of a Cat B office fit-out

A Category B (Cat B) office fit-out is all about tailoring the space to suit your business needs and brand identity. Here’s what you can typically expect:

• Custom interior design & branding: From wall graphics to furniture, the space is designed to reflect your company’s culture and aesthetic.
  
  
• Optimised layout & partitioning: Tailored spaces for private offices, meeting rooms, collaborative zones, and breakout areas, ensuring efficiency and flow.
  
  
• Furniture & fixtures: Ergonomic and functional furniture, selected to meet both comfort and brand requirements.
  
  
• Lighting & electrical solutions: Carefully chosen lighting to enhance productivity and wellbeing, with power outlets and data cabling to support the office’s needs.
  
  
• IT & AV infrastructure: Integrated systems for seamless communication, including networking, data cabling, and conference technology.
  
  
• Specialised installations: Bespoke features such as wellness rooms, café-style kitchens, or creative spaces, depending on your business requirements.

2025 Update: Trends Shaping Cat A vs Cat B Fit-Outs

In 2025, the office fit-out market is seeing a shift as businesses respond to changing work models and increased demands for flexibility and quality. Cat A fit-outs are being designed with a focus on future adaptability, incorporating smarter tech and sustainable infrastructure to cater to evolving hybrid work needs. Companies are investing more per square foot to create highly functional, tech-enabled spaces, even within smaller office footprints, aligning with the rise of return-to-office mandates.

Cat B fit-outs, meanwhile, are becoming the focal point for businesses looking to create a truly personalised, employee-centric environment. This is where we see a stronger emphasis on wellness features, such as biophilic design, flexible workstations, and collaborative zones – all designed to boost productivity and improve the overall employee experience. Sustainability continues to drive both Cat A and Cat B projects, with companies choosing eco-friendly materials, energy-efficient systems, and green spaces as part of their office design, contributing to both environmental goals and employee well-being.

DENTON, the leading design and build, office fit-out company

Choosing the right fit-out service depends on your business’s priorities, timeline, and budget. If you’re looking for a clean slate and complete customisation, Shell and Core is the way to go. Cat A provides a functional workspace with essential amenities, while Cat A+ adds aesthetic enhancements. For the ultimate tailored office that represents your brand, Cat B fit-out service is the best choice. Understanding these fit-out categories empowers you to make an informed decision that suits your company’s unique requirements and aspirations.

Drop our friendly, experienced team a line today and let’s start a project together. Or browse DENTON’s services and ESG policy to see what other projects we can help you with.