Office fit-out costs in 2026: What affects the price?

Having leased a new office and preparing for a fit-out is an exciting step in growing your business. But as you start planning, one of the first questions asked is always the same: “How much does an office fit-out cost?”

Unfortunately, the answer isn’t always straightforward. Fit-out costs can vary depending on numerous factors, such as the size and location of the space, along with the level of work needed to make it suitable for your operations.

In this article, we’ll break down the key factors that influence fit-out costs, helping you understand where your budget should go and how to make practical, informed decisions from the start.

Average Fit-Out Costs in 2026

There isn’t a fixed cost for an office fit-out, as every project comes with its own requirements. However, using average costs per square foot provides a practical way to estimate budgets and understand how different elements of a re-fit contribute to the final sum.

Here’s an average cost guide to give you an idea of what to expect at low, medium, and high specification fit-out projects.

Typical costs per sq ft	Low	Medium	High
Construction	£40	£60	£90
Furniture	£10	£20	£40
AV & IT	£3	£6	£12
Security	£1	£3	£5
Systems (HVAC, lighting, etc.)	£8	£15	£25
	£62	£104	£172

What Factors Will Affect Fit-Out Costs?

Fit-out costs aren’t one-size-fits-all. They vary depending on the building, the level of work required, and how you need the space to function. Looking at these factors early helps you understand what the project is likely to involve.

1. Design and Build vs Traditional Procurement

 

One of the main factors that affects the cost of a fit-out is the route you take between design and build or traditional procurement.

With design and build (D&B), everything is handled under one contract. The design and build processes are planned together, meaning costs are fixed and clearer earlier on, making the project easier to manage as it progresses.

Traditional procurement splits the design and construction into separate stages. This often means that costs aren’t fully confirmed until later in the process, which can make budgeting and timelines more difficult to control.

In most cases, design and build is the preferred option. It keeps processes simpler, reduces delays, and gives you greater control over costs from the beginning.

2. Structural Changes

 

It’s important to consider whether your fit-out will include simple cosmetic updates or more significant structural work.

Simple changes to the interior design, such as flooring, finishes, and internal layouts, are generally more straightforward and cost-effective. Work that alters the structure of the building, like adding new rooms or reworking the building layout, is more complex and can quickly increase construction costs.

To avoid the high cost, many businesses choose to install partitioning systems as a budget-friendly alternative. They provide a practical way to create private offices and meeting rooms without the need for major structural changes.

3. IT, AV, and Building Systems Requirements

 

Core services like lighting, power, heating, and ventilation are usually standard across projects. Where costs can vary more is with IT infrastructure and AV systems.

Depending on your business requirements, this can range from basic data cabling through to fully integrated meeting rooms and smart technology. The more advanced the setup, the higher the cost.

Choosing the right systems early will ensure the workspace works properly from day one, without the need for upgrades later on.

4. Office Size

 

The size of your office space has a direct impact on both the overall cost and how that cost is spread.

Larger office spaces require more materials, labour, and time, which increases the overall project cost. This includes everything from raised floors and ceilings to partitioning and furniture. However, cost per square foot can sometimes become more efficient at a larger scale.

Smaller spaces may have a lower overall cost, but can be less efficient in terms of cost per square foot, especially if fixed elements like meeting rooms, kitchens, or IT infrastructure are still needed.

It’s not just about size, but how you use the space. Thoughtful project management and space planning can help cut waste, improve movement, and prevent unnecessary build costs.

5. Type of Fit-Out

 

The type of office fit-out you require can also have a significant impact on the final cost, as each type has a different scope of work.

At the most basic level, shell and core fit-outs provide the structural starting point of a building, with minimal work completed. Category A fit-outs transform an empty office space into a functional one, installing core services like lighting, ceilings, and HVAC systems, but leave the space as a blank canvas. Category B fit-outs provide the most complete finish, creating a fully operational workplace with layouts, furniture, and branding, ready for businesses to move in.

The further along this scale you go, the more work is required, increasing the cost.

If you’re unsure which option is right for your space, you can read our full guide on what office fit-outs are, where we break down the types in more detail.

6. Project Timeline

 

Shorter timelines will often require additional labour, extended hours, or weekend work to keep things on track and meet deadlines. This can increase costs, especially if multiple trades need to be coordinated within a tighter schedule.

Allowing more time gives greater flexibility in how the project is delivered, helping to keep costs under control while still achieving the required finish.

7. Compliance & Regulations

 

Meeting building regulations is a key part of any office fit-out. This can include fire safety, accessibility, and ventilation requirements. Depending on the condition of the space, upgrades may be needed to meet current standards, which can add to both cost and programme.

8. Quality of Materials

 

Standard materials are more cost-effective and suitable for most commercial environments. Higher-quality finishes or bespoke elements will increase the upfront cost, but can reduce maintenance and replacement over time.

The focus should be on choosing materials that suit how the space will be used day to day, not just how it visually looks.

9. Technological Needs

 

Technology requirements can vary significantly depending on how your business operates.

For some, this may be limited to basic data cabling and Wi-Fi. For others, it can include integrated meeting room systems, smart controls, and more advanced AV setups.

As requirements become more complex, costs increase. Getting this right early ensures everything works properly from day one, without needing to revisit it later.

10. Furniture Selection

 

Furniture is often one of the more flexible elements of an office fit-out budget.

Off-the-shelf options can help keep costs under control, while bespoke or design-led furniture will increase spend. The number of workstations, meeting areas, and breakout spaces will also influence the total cost.

Preparing For An Office Fit-Out in 2026

Workplaces are being designed around flexibility. Businesses are moving away from fixed layouts and instead creating spaces that support a mix of working styles, from focused work to collaboration and meetings. Getting the layout right early on is key to making the most of the space.

There’s also a growing focus on long-term value. Rather than simply increasing floor space, businesses are investing in environments that improve productivity, support staff wellbeing, and make better use of what they already have.

Sustainability is another important factor. This includes using durable and sustainable materials, rethinking existing layouts where possible, and making choices that reduce waste and long-term running costs.

In practical terms, preparation comes down to clarity. Understanding how your business works, what the space needs to deliver, and planning this properly from the outset will make the entire project smoother, more cost-effective, and easier to manage.

Why Choose Norris UK for Office Fit-Outs?

At Norris UK, we keep the fit-out process straightforward. Everything is managed in-house, from initial surveys and planning through to installation and final handover. This keeps communication clear, improves coordination, and helps avoid unnecessary delays. We focus on delivering spaces that work in practice, not just on paper. Every project is planned around your business, your team, and how the space will be used day-to-day.

We’re also experienced in working in live environments. Where offices are occupied, or projects need to be phased, we plan around your operations to minimise disruption and keep things running as normal. The result is a space that’s practical, well delivered, and ready to perform from day one.

If you’re considering an office fit-out, get in touch with our team to discuss the options available for your space. We’ll work with you to find the right approach and deliver a workspace that is tailored to how your business operates.