How to Plan a Large Corporate Office Fit-Out

The short answer: plan a large corporate office fit-out as a business programme, not an interior design project. Work out what the workplace needs to do, then make decisions in the right order, from governance and building checks through to budget, programme, design, approvals and the move itself. Most of the expensive problems come from getting that order wrong, such as signing a lease before the building has been properly tested or approving a budget before anyone has agreed the scope.

Planning a new corporate headquarters is an exciting opportunity to rethink what your workplace could be. After all, if you're going to invest in a new HQ, you want it to do a lot more than just look good in the photos.

It's also a fairly substantial undertaking.

When you're planning a headquarters for hundreds of people, there's a lot to think about before you get anywhere near choosing furniture. And with a sizeable investment on the line, it's worth getting those early decisions right. Nobody wants to discover an expensive oversight halfway through the project.

This is often where projects start to come unstuck. It's easy to get carried away with a building that looks perfect on paper, only to discover later that it doesn't quite work for the business. And there's nothing quite like getting excited about a design before the budget comes along and brings everyone back down to earth.

Planning a large corporate office fit-out is about understanding what the business actually needs from its workplace and working out how to make that happen. It's easy to get caught up in the exciting design ideas, but the real groundwork happens long before that. You need to know what you're working towards and whether the building and budget agree with your ambitions.

Here's how we'd approach it.

1. Start with what the business actually needs

Before looking at layouts or deciding how many meeting rooms to include, it's worth understanding why the organisation is considering a fit-out in the first place.

There are plenty of reasons why a business might be considering a new headquarters. Perhaps the current office has simply stopped working for the people using it, or the business has grown to the point where everyone's starting to feel a little squeezed. It could also be part of a bigger change, like bringing several divisions together under one roof.

Whatever the reason, it's worth understanding what's driving the project before getting too far into the planning.

Take a business looking to bring five departments into one headquarters. Its requirements are likely to be quite different from those of a company that simply wants to give its existing office a much-needed refresh. They might have exactly the same number of employees, but that doesn't mean they'll need the same amount of space or use it in the same way.

This is why we'd always start with a proper conversation about where the business is heading and what's not working at the moment. It's also worth thinking about what a successful outcome would actually look like. Will the new workplace make day-to-day working easier? Will it help attract and retain good people? And will it still work for the business in five years' time?

Getting everyone on the same page early makes the decisions that follow a whole lot easier.

Because the last thing anyone wants is to spend a small fortune on a beautiful new office, only to realise it hasn't actually fixed what was wrong with the old one.

2. Understand how people actually use the workplace

Once the business objectives are clear, the next step is understanding how people work. For larger organisations, relying on headcount alone can be particularly misleading.

A company with 500 employees doesn't necessarily need 500 desks. Equally, a workplace with relatively low average attendance might still experience overcrowding on particular days.

The British Council for Offices’ 2025 review of post-pandemic office use found utilisation has settled at around 66%, well below the 80% benchmark the industry relied on for years. In other words, the old rules of thumb for sizing an office don’t necessarily hold anymore.

And it's not just about the number of people coming into the building. It's about what they're coming in to do.

Some teams spend most of their time collaborating, while others need somewhere quiet to concentrate. Certain departments may require secure areas or specialist equipment. Others might regularly host clients, training sessions or workshops.

This is where evidence-based workplace planning becomes valuable.

Occupancy and utilisation data, employee surveys, stakeholder interviews and observations can help build a much clearer picture of how the existing workplace performs.

You might discover that certain meeting rooms are constantly in demand while others are rarely used. Or that people are struggling to find quiet spaces despite having plenty of available desks.

These details matter because they influence what the new workplace should contain.

At Habit Action, we use workplace research to help organisations make informed decisions about space, rather than relying solely on assumptions about how employees are supposed to work.

If you're still trying to establish your requirements, our Office Space Calculator can help you start estimating how much space your organisation might need.

3. Get the right people involved before decisions become expensive

When planning a large office fit-out, there are usually quite a few people who need to have their say. And naturally, everyone has their own ideas about what the new workplace should look like.

The leadership team might be focused on the bigger picture, while HR is thinking about how the space will work for employees. Then there's IT, finance and the people who actually have to manage the building day to day. All have important input, but getting everyone to agree isn't always easy.

That's why we'd recommend putting a project team together early on. Make sure the right people are involved, everyone knows what they're responsible for and, importantly, it's clear who gets the final say.

It also helps to think of the project as a series of decision gates. Agree the workplace brief first, then the property, concept design, cost, detailed design and procurement, and give each gate a clear owner. Projects rarely lose time because nobody has an opinion. They lose time because plenty of people have opinions and nobody has the authority to close the decision.

This matters more than you might think, particularly once the design starts progressing.

Moving a meeting room around on an early floor plan is usually no big deal. Trying to do the same thing once all the technical details have been worked out is another story. Suddenly, what seemed like a simple change can have a knock-on effect on the cost and construction programme.

And nobody wants to find out a few weeks before work starts that an entire department has been forgotten about.

A little more coordination at the beginning can save a lot of headaches (and some rather awkward conversations) further down the line.

4. Test the property against the requirements

Whether you're staying in your current office or looking for somewhere new, you need to make sure the building can actually support what you've got planned.

And there's a bit more to that than checking whether everyone will fit.

A building might look perfect during a viewing, but once you start looking at the technical details, things can get a little more complicated. It might not have enough power for the technology you want to install, or the ventilation might struggle with the number of people you're planning to accommodate.

These aren't necessarily dealbreakers, but they're things you'll want to know about before committing to the building. The same goes for any restrictions on what you can change, or approvals you'll need from the landlord.

This is where getting the right technical advice early can save you a lot of trouble.

For example, you might find a building with more than enough floor space for your team, only to discover that the ventilation needs a major upgrade to support that many people. Suddenly, what looked like a straightforward fit-out has become a much bigger investment.

We've seen how important this is on projects like Veeva Systems in London's Metropolis building, where the design needed to work with the building's existing infrastructure while creating a modern, sustainable headquarters. Understanding what the building could support was just as important as deciding what the finished workplace should look like.

And if you're weighing up a few different properties, don't just compare the rent. A cheaper building that needs extensive upgrades might end up costing considerably more than one that's already better suited to your needs.

It's always worth finding that out before signing on the dotted line.

5. Build a budget that reflects the actual project

Cost per square foot is a good starting point when budgeting for an office fit-out, but it doesn't tell you the whole story.

You could have two offices that are exactly the same size, yet the cost of fitting them out could be miles apart. One might only need a few changes to the layout and some new furniture, while the other needs a serious amount of work behind the scenes before anyone can even think about moving in.

To give you a sense of the range, Cushman & Wakefield’s 2026 UK Office Fit Out Cost Guide puts “all-in” fit-out costs in London at around £148 per sq ft for a lower specification, £243 for medium and £359 for high. Manchester comes in at roughly £128 to £310 per sq ft depending on specification. Those figures are useful for an early business case, but they won’t tell you what your project will cost.

And it's not just the construction work you need to budget for.

There are plenty of other costs that can creep in, from professional fees and surveys to furniture, IT and the move itself. It's surprisingly easy to overlook some of these when you're focused on what the finished office is going to look like.

That's why it's important to understand exactly what's included in your budget from the beginning. A figure might look quite reasonable on paper, but if nobody has accounted for the building needing a major electrical upgrade, that number isn't going to stay reasonable for very long.

We'd always recommend working through the budget alongside the design and technical investigations, rather than treating them as separate exercises. That way, you can make informed decisions about where to invest and where it might make sense to do things differently.

It's also worth keeping a little breathing room in the budget for anything unexpected. Even with the best planning, buildings have a habit of throwing up the occasional surprise.

Watch out: a £200-per-sq-ft allowance means very little unless everybody agrees what’s included in that £200.

For a better idea of what to expect, take a look at our Commercial Fit-Out Cost Guide.

6. Work backwards from when the office needs to be operational

There's quite a lot that needs to happen before anyone picks up a tool on site. And even once construction is finished, it doesn't mean the office is ready for everyone to move in.

For larger organisations especially, it's worth thinking about the whole process rather than just how long the building work will take.

We'd always recommend starting with the date you actually need the office up and running, then working backwards from there. It gives you a much clearer idea of when things need to happen and, importantly, when decisions need to be made.

Working back from move-in, ask yourself:

• When must staff move in?

• When must commissioning finish?

• When must construction finish?

• When must long-lead items arrive, and when do they need ordering?

• When must the design be frozen and signed off?

Some things will take longer than you might expect, particularly when you're dealing with specialist equipment or materials that need to be ordered well in advance. You could have a perfectly sensible construction programme, but if something essential isn't arriving for another three months, that's going to cause a few headaches.

Here’s how that plays out. You might have a 16-week construction programme, which sounds manageable. But if a critical piece of equipment has a 20-week lead time and isn’t ordered until construction begins, the 16 weeks is no longer the number that matters. The ordering date is. That’s why we’d keep a long-lead tracker running during design, not after it.

The earlier you know about these things, the easier they are to plan around.

Our 11,000 sq ft Veeva Systems London project was delivered over seven months, and the 85,000 sq ft Shoal Group headquarters and warehouse over six, while the transformation of Atlas Copco’s 55,000 sq ft headquarters took 12 months.

It's not just the size of the office that determines how long things take. The condition of the building and how much work is needed can make a big difference, particularly if you're working around an existing business that needs to keep operating.

So rather than simply asking how long the fit-out will take, it's worth understanding how long it will be before the workplace is genuinely ready to use. Those can be two very different dates.

7. Develop the design alongside cost and buildability

By this point, you should have a pretty good idea of what the business needs from its new workplace, what the building can handle and how much you've got to spend.

Now comes the exciting part. The design.

This is where you can start thinking about how the space will actually work for people. Where will teams sit? Do you need more places for quiet work or somewhere people can get together? And how can you make the office somewhere employees genuinely enjoy spending time?

It's also an opportunity to bring the business's personality into the space. Your headquarters says a lot about who you are, particularly when clients or potential employees come to visit. You want it to feel like your business, not just another office that's followed the latest design trends.

But as exciting as the design stage can be, there's still a practical side to think about.

There's not much point falling in love with an incredible design if it's going to cost twice the budget or turn out to be a nightmare to build.

This is why we believe getting contractors involved early makes such a difference. Having the people who understand how things will actually be built working alongside the designers means you can spot potential problems before they become expensive ones.

Something as simple as moving a meeting room might look like a quick adjustment on a drawing. In reality, it could mean changing the ventilation, lighting and electrical layouts too. Much easier to sort out while it's still a drawing than when someone's already built the walls.

Know when to freeze the design

Large organisations often find this the hardest part. Somebody always has one more idea, and late changes rarely affect just one thing. A new boardroom arrangement can ripple into power, lighting, AV, ventilation and joinery. So agree a design freeze date, and treat anything after it as a project change, understanding its cost and programme impact before approving it. “Small change” is one of the most expensive phrases on a construction project.

At Habit Action, our design and build approach means these conversations happen throughout the project. The people designing the space are working closely with those responsible for delivering it, so we're not waiting until construction starts to find out whether an idea is actually achievable.

Because good design shouldn't just look great on paper. It needs to work just as well in real life.

8. Resolve approvals and technical requirements before construction

There are some parts of an office fit-out that aren't particularly exciting, but they're often the things that make the biggest difference to how smoothly a project runs.

Getting the right approvals in place is one of them.

Depending on the building and what you're planning to do, you might need permission from the landlord or approval for certain aspects of the work. These things can take time, and the last thing you want is to have everyone ready to start construction, only to discover you're still waiting for a piece of paperwork.

There are also legal responsibilities to think about. Under the Construction (Design and Management) Regulations 2015, commercial clients have certain duties when planning and managing construction projects. It's important to understand these early and make sure the right people are involved.

Then there's the technical side of things.

You need to make sure everything behind the scenes works together properly. There's not much point designing a brilliant new meeting suite if nobody has thought about how the ventilation or electrical systems will support it.

This is why getting the details worked out before construction begins is so important. Everyone should know what's being built, who's responsible for what and which decisions have already been agreed.

Of course, things can still change once work gets underway. Buildings have a habit of revealing the odd surprise, particularly when you start opening up walls and ceilings.

But the more you can work through beforehand, the less likely you are to find yourself having some rather expensive conversations halfway through the project.

9. Plan construction, business continuity and the move together

An office fit-out is one thing. Making sure the business can carry on as normal while it's happening is another.

If you're moving to a new building, there's usually quite a bit to organise before everyone can settle in. You might have an existing lease coming to an end, IT systems that need moving and a few hundred employees expecting to turn up on Monday morning and get straight back to work.

And if you're refurbishing an office while people are still using it, things can get even trickier.

You can't exactly ask an entire department to stop working for a few weeks while you knock down the walls around them. There needs to be a plan for keeping the business running, which might mean carrying out work in stages or scheduling the noisier jobs outside normal office hours.

A good question to ask early is: what can the business not afford to lose access to? It might be a server room, a client suite, a production line or simply enough desks for one team on its busiest days. Whatever the answer, it should shape the phasing from the start.

We've covered this in more detail in our guide to phasing an office refurbishment without disrupting your business.

But it's not just the construction work that needs planning. There's also the small matter of getting everyone used to their new workplace.

If you're introducing a different layout or changing how people work, it's worth bringing employees into the conversation early. People generally like to know what's happening, particularly when it involves changing the place they spend a good chunk of their week.

A little communication and some time to get familiar with the new space can make the move a lot easier. After all, you don't want to spend months creating a brilliant new workplace only for everyone to spend their first week trying to work out where they've put the meeting rooms.

For us, the project isn't really finished just because the builders have packed up and left. It's finished when people can settle in and the workplace is doing what it was designed to do.

10. Review how the workplace performs after move-in

Once the furniture's in, the meeting rooms are ready and everyone's moved into the new office, it's tempting to think the job's done.

But this is actually when you start finding out how well the space works.

You might discover that certain areas are much more popular than expected, or that some teams could really do with somewhere quieter to work. Perhaps the meeting rooms aren't being used quite how you'd imagined, or people have found their own ways of using the space that nobody thought of during the design stage.

And that's completely normal. You can plan as much as you like, but there's nothing quite like having people actually use the workplace to find out what works and what doesn't.

That's why we'd always recommend checking in once everyone's had a chance to settle. Talk to employees, look at how the space is being used and see whether the new workplace is delivering what you originally set out to achieve.

You might find that a few small adjustments could make a big difference. And if you're responsible for several offices, there's plenty you can learn and take into future projects too.

At Habit Action, we don't see handing over the keys as the end of our involvement. Our aftercare approach means we stay in touch with clients to understand how their workplace is performing and help make changes where they're needed.

Because businesses don't stand still, and their workplaces shouldn't have to either. What works brilliantly today might need a bit of a rethink in a few years, and that's all part of creating a workplace that can grow with you.

What does good corporate HQ planning look like in practice?

Our work with Atlas Copco is a good example of why planning a new headquarters involves a lot more than deciding where everyone's going to sit.

The business wanted to bring five separate divisions together into one location, which sounds straightforward enough until you consider that each had its own way of working.

The 55,000 sq ft headquarters in Hemel Hempstead needed to work just as well for the people in the office as it did for those using the workshops. And bringing everyone under one roof was only going to be worthwhile if the new space actually made day-to-day working easier.

So, a big part of the project was understanding how the different teams operated and finding ways to help them work better together, without overlooking the practical needs of each division.

The result was a headquarters that gave employees more opportunities to connect while also improving the facilities needed to keep the wider business running.

And the results speak for themselves.

Since the transformation, office occupancy has increased by 30%, while workshop capacity has grown by 40%.

It's a good reminder that a successful headquarters project isn't just about giving an old building a new look. It's about making a real difference to how the business operates.

Good office planning is about making decisions in the right order

There's no one-size-fits-all approach to planning a large office fit-out. Every business works differently, and every building has its own quirks. Some of which you'll probably wish you'd known about a little sooner.

But if there's one thing we'd encourage, it's taking the time to work out what you actually need before getting carried away with how it's all going to look.

The more you understand about how your business works and what you want to achieve, the easier it becomes to make the right decisions. And when the design is developed alongside the practical realities of the building and your budget, you're far less likely to run into expensive surprises further down the line.

It might not be the most exciting part of creating a new headquarters, but getting the groundwork right can save an awful lot of trouble later.

If you're thinking about moving to a new headquarters or giving your current office a major rethink, our Office Fit-Out Readiness Assessment is a good place to start. It'll help you work out how far along you are with your plans and whether there's anything worth looking into before making the bigger commitments.

Because creating a great workplace starts long before anyone draws the first floor plan.

Frequently asked questions

What is the first step in planning a large corporate office fit-out?

Start by defining the business objectives and understanding what the workplace needs to support. This should include reviewing current utilisation, employee requirements, future growth and any technical or operational constraints before developing the design.

How long does a large corporate office fit-out take?

It depends on the building, the scope of work and the project's complexity. Large projects can take several months or longer to construct, but the full programme should also include workplace strategy, surveys, design, approvals, procurement, commissioning and relocation.

How much does a corporate office fit-out cost?

Costs vary significantly depending on location, specification, building condition, mechanical and electrical requirements, furniture and technology. Early benchmarks can inform the business case, but a reliable budget needs to be developed around the actual scope of work.

Who should be involved in planning a corporate office fit-out?

Usually leadership, property or facilities, finance, HR, IT and relevant operational teams. Depending on the organisation, security, sustainability, brand and employee representatives may also need to contribute. Clear decision-making responsibilities are important.

When should an organisation appoint its fit-out partner?

Ideally, while there is still flexibility to influence property decisions, technical requirements, budget and programme. Early involvement can help identify construction constraints and commercial risks before the design becomes difficult or expensive to change.

What happens after an office fit-out is completed?

The workplace should be commissioned and handed over, employees supported during occupation, and the space reviewed once it has been in use. Post-occupancy feedback and utilisation information can help identify improvements and assess whether the project is meeting its original objectives.