Cat B Fitout

We take your Cat A space and transform it into a workplace that reflects your organisation, your culture and the people who will use it every day.

From Cat A shell to a workplace that performs.

A Cat A space provides the foundation. A Cat B fitout is where it becomes yours. We manage the full process of transforming a developer-finished space into a fully functioning, distinctly personalised workplace, from spatial planning and interior design through to mechanical and electrical fit out, furniture specification and technology integration.

Designed around how your organisation works.

The most effective Cat B fitouts begin with a genuine understanding of the organisation moving in. Before a layout is drawn or a finish selected, we invest time in understanding your culture, your people and your ways of working, ensuring the space is designed for how your organisation truly operates rather than how a generic occupier might.

Delivered with certainty from day one.

Our progressive budgeting approach runs alongside the design process from the earliest stages, continuously validating cost so there are no surprises at contract stage. Full contractor governance, programme control and statutory compliance are managed throughout, ensuring your Cat B fitout is delivered on time, within budget and to the standard your organisation deserves.

A Cat B fitout is an opportunity to get it right.

Moving into a new Cat A space presents a genuine opportunity to create a workplace that truly reflects your organisation. The shell is clean, the possibilities are open and the decisions made at this stage will shape how your people work for years to come. Organisations that approach their Cat B fitout with a clear brief, engaged stakeholders and a structured delivery plan consistently achieve better outcomes than those that begin with a layout and work backwards. At Spectrum, we help organisations make the most of that opportunity, bringing the same rigour and people-first thinking to every Cat B fitout that we bring to every other stage of workplace transformation.

Workplaces built around people.

Every project we deliver starts with understanding your organisation, your culture, your people. The spaces we create are well-designed, well-used and still working well years after handover.

What our clients say.
Frequently Asked Questions
What is a Cat B fitout?

A Cat B fitout is the process of transforming a Cat A shell into a fully functioning, occupier-specific workplace. It covers design, partitioning, furniture, technology and all the elements that make a space distinctly yours.

A Cat A fitout delivers a generic, base-level space suitable for any occupier. Cat B takes that shell and transforms it into a workplace tailored to a specific organisation’s identity and ways of working.

Timescales vary by scale and complexity. Spectrum offers a clear, structured programme with full visibility at every stage and cost validated continuously throughout.

Through our strategy and brief building process, we develop a deep understanding of your organisation before any design decision is made, ensuring the finished space feels distinctly yours.

Yes, Spectrum manages the full Cat B fitout process. From initial strategy and brief building through to interior design, technical coordination, construction delivery and workplace onboarding, all under one roof.

Explore our other services.