Planning your first office project? Whether you’re relocating, expanding or opening a new workplace, an office test fit can help you assess potential buildings, compare your options and make informed decisions before committing to a lease. In this guide, we explain what an office test fit is, why it matters and how it can save time, money and risk throughout your project.

Choosing an Office Is About More Than Square Footage

For many organisations embarking on an office project, the search often begins with a shortlist of buildings that tick the obvious boxes.

The location is right. The rent is within budget. The floor area looks sufficient, and the building has the amenities your team is looking for. But while these factors are important, they only tell part of the story.

Two offices with the same square footage can perform very differently once they’re planned around the way your business actually works. One may comfortably accommodate your team with room for future growth, while another may struggle to provide enough meeting rooms, collaboration areas or even desk space due to the shape of the floorplate or the position of the building core.

This is where an office test fit becomes invaluable.

Before investing in detailed design or committing to a lease, a test fit helps you understand how a workplace could function in practice, giving you greater confidence that you’re choosing the right building for your organisation.

Whether you’re considering an office design and fitout in Ireland, assessing offices in Dublin or Belfast, or comparing multiple buildings across different locations, a test fit provides the insight needed to make a more informed decision.

What Is an Office Test Fit?

An office test fit is an early-stage space planning exercise used to determine how a workplace could be configured within a particular building.

Using the building’s architectural floor plans, our workplace designers develop a proposed layout showing how the space could accommodate your organisation’s requirements. This typically includes workstations, meeting rooms, breakout spaces, collaboration areas, reception, kitchens, storage and supporting facilities.

Importantly, a test fit is not an interior design proposal. At this stage, the focus isn’t on finishes, furniture or colour palettes. Instead, it’s about understanding whether the building is fundamentally capable of supporting the way your business works. A simple way to think about it is this:

A test fit tells you whether a building works before you invest in designing what it will look like.

Why Square Footage Doesn’t Tell the Full Story

It’s easy to assume that a 10,000 sq. ft. office will comfortably accommodate more people than an 8,500 sq. ft. office.

In reality, that’s not always the case. The efficiency of a workplace depends on a wide range of factors, including:

Two buildings of a similar size can produce very different layouts. One building may allow for an open, flexible workplace with excellent circulation and multiple collaboration areas. Another may require compromises due to structural constraints, reducing the number of workstations or limiting opportunities for meeting rooms and breakout spaces.

Without a test fit, these differences often remain hidden until much later in the project, when making changes becomes significantly more expensive.

How Test Fits Help You Compare Different Buildings

Instead of asking, “Which office is bigger?”, you can start asking much more valuable questions.

Can the building accommodate our team?

A test fit confirms whether the office can comfortably accommodate your current team while providing flexibility for future growth. Rather than simply fitting desks into a space, it considers how your teams interact and the supporting spaces they need to work effectively.

Does the workplace support the way we work?

Modern workplaces require far more than rows of desks. From focused work areas and meeting rooms to collaboration spaces, quiet booths and social areas, a test fit helps determine whether these environments can be successfully incorporated into the building.

Which building offers the best long-term value?

Sometimes a slightly smaller office can perform far more efficiently than a larger one. By comparing multiple test fits side by side, businesses can identify which property offers the strongest balance between functionality, flexibility and overall value.

Are there any hidden challenges?

Every building has constraints, it could be an awkward floorplate, limited natural light or building services that restrict layout options, identifying these factors early allows businesses to make informed decisions before signing a lease.

The Benefits of Carrying Out an Office Test Fit

Make Better Property Decisions – Rather than relying on assumptions, you’ll understand exactly how each building could support your business.

Compare Multiple Offices Objectively – Using a consistent set of criteria, compare potential offices, rather than relying solely on rent, location or floor area.

Reduce Risk – Identify constraints before signing a lease, helping avoid costly compromises later in the project.

Improve Budget Confidence – Understanding how the workplace is likely to be configured provides a much stronger foundation for early cost planning and budgeting.

Support Internal Decision-Making – A visual layout helps directors, finance teams and other stakeholders understand how the workplace will function, making internal approvals much easier.

Save Time Throughout the Project – By answering key planning questions at an early stage, detailed design can progress more efficiently once a building has been selected.

When Should You Carry Out a Test Fit?

Ideally, a test fit should be completed before signing a lease or making any long-term commitment to a building. It is particularly valuable when:

• Comparing multiple office buildings
• Deciding whether to relocate or refurbish an existing workplace
• Assessing future growth requirements
• Reviewing shortlisted properties with property agents or landlords
• Building the business case for a new office

The earlier a test fit is undertaken, the more opportunities there are to influence the outcome of the project.

What Information Is Needed?

A successful test fit starts with understanding both the building and the organisation that will occupy it. Typically, this includes:

How Calibro Approaches Office Test Fits

At Calibro Workspace, we see a test fit as much more than a space planning exercise.

Our workplace consultancy team combines business insight with practical space planning to create test fits that help organisations compare buildings, understand capacity and make confident property decisions before progressing into office design and fitout.

Whether you’re evaluating office space in Dublin, Belfast or elsewhere across Ireland, our aim is to provide the clarity needed to move forward with confidence. Reach out to our workplace experts: hello@calibroworkspace.com | +44 (0) 28 9442 5200