Published on:

05 November 2026

Updated on:

28 October 2026

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Refurbishing an office creates a practical challenge: how do you improve the workplace while keeping the business running?

For some organisations, moving everyone out is difficult. Customer-facing teams need continuity, specialist equipment cannot easily be relocated, or suitable temporary accommodation is hard to find. A phased office fit out may offer a workable approach, allowing parts of the workplace to remain in use while others are refurbished.

Its success depends on more than dividing a floor plan into sections. Staff need suitable places to work, building services need careful coordination, and construction activities need to be managed around daily operations.

Here is what to consider before deciding whether an office refurbishment while occupied is right for your business.

What is a phased office fit out?

A phased office fit out divides a refurbishment into separate stages. Teams may move into temporary work areas while one part of the office is upgraded, then occupy the completed space as work progresses elsewhere.

Phases might follow floors, wings or groups of rooms. However, the most practical sequence depends on how the building functions. A shared ventilation system, central communications room or single access route can affect areas beyond the immediate construction zone.

Our Cat B refurbishment guide explores how a workplace can be adapted to an organisation’s needs. Phasing addresses the delivery question: how can that transformation happen around the people already using the space?

When is phasing a practical option?

Start by assessing the building and the business together. An office may have enough spare desks to accommodate a temporary move, but insufficient meeting rooms, connectivity or facilities to support the displaced team.

Phasing is worth exploring where:

  • Work areas can be separated effectively from occupied space.
  • There is suitable temporary accommodation within the building.
  • Essential services can remain available or interruptions can be managed.
  • Teams have some flexibility over where and when they work.
  • The programme can accommodate successive moves and handovers.

The scope of works matters too. Changes contained within individual areas may be easier to phase than extensive alterations to services shared across the building.

Make continued occupation part of the brief from the outset. It influences the construction approach, access arrangements and programme, rather than being something to accommodate after these decisions have been made.

Make temporary work areas genuinely usable

Temporary accommodation needs to support the work people actually do.

Before moving a team, check desk capacity, power, data connections, lighting, ventilation and access to everyday facilities. Consider confidential conversations, video calls, focused work and any equipment that needs a dedicated location.

A reduced office footprint may require temporary booking arrangements or agreed attendance patterns. These should reflect operational needs and individual circumstances, rather than assuming everyone can work remotely.

 

An illustrative example: a business with two office wings might move one team into spare capacity in the second wing while the first is refurbished. Before that move, it would need to confirm that the temporary area can accommodate the extra people, meetings and equipment. The completed wing would then be checked and prepared before becoming the next occupied area.

This sequence only works if each temporary move is practical in its own right.

Separate construction from everyday office activity

Employees and visitors need to understand where they can go, while contractors need controlled access to their work areas.

The delivery plan should address physical separation, entrances, circulation routes, deliveries, waste removal and material storage. Where routes or lifts are shared, their use needs coordination.

HSE guidance emphasises defined site boundaries and measures to prevent unauthorised access. The appropriate arrangements depend on the work and its surroundings. HSE guidance on protecting people around construction work.

Fire precautions also need attention throughout the project. HSE specifically highlights the importance of protecting escape routes and existing fire safety systems in occupied buildings. These arrangements should be reviewed as phases change, with relevant building-management and project specialists involved. HSE guidance on construction fire safety.

A route that works during the first phase may need a different arrangement during the next.

Plan noisy and disruptive work around the business

Drilling, stripping out and cutting can affect neighbouring work areas even when construction is physically separated. Identify the activities likely to disrupt calls, meetings or concentrated work before agreeing the programme.

Some tasks may be scheduled outside normal office hours. Others may require teams to work elsewhere for a defined period.

Evening or weekend working needs to be checked against building rules, access arrangements and any applicable restrictions. Local authorities may impose limits on construction working hours, so unrestricted out-of-hours access should not be assumed. HSE information on construction nuisance.

Dust needs appropriate control at its source, alongside measures suited to the occupied environment. HSE identifies methods such as extraction and water suppression, depending on the activity. The contractor should establish suitable controls for the specific works. HSE guidance on construction dust.

For employees, advance notice matters. Knowing when disruption is expected allows teams to rearrange important activities.

Coordinate building services and IT continuity

A construction phase may occupy one corner of the office while its service connections affect a much larger area.

Before works start, establish which systems are shared and what needs to remain operational. This includes power, heating and ventilation, water, access control, data networks and communications equipment.

For each planned interruption, agree:

  • Which areas and systems will be affected.
  • When the interruption can take place.
  • Who authorises and communicates it.
  • What temporary arrangements are needed.
  • How services will be tested before normal use resumes.

Bring internal IT teams and relevant suppliers into the planning process early. Moving desks is only useful if people can connect to the systems they need afterwards.

Check Wi-Fi coverage, wired connections, meeting-room technology and specialist equipment in each temporary area. Build in time to resolve issues before the next team move.

Keep employees informed as the plan develops

A phased refurbishment changes people’s working arrangements repeatedly. Communication should follow that sequence.

Employees need clear information about where they will work, how they will access the building, which facilities are available and when disruption is expected. They also need a named contact for questions or concerns.

A simple floor plan and regular updates can make arrangements easier to understand. Explain changes promptly, particularly when work affects access, meetings or service availability.

Communication should also allow feedback. If a temporary area is proving too noisy for customer calls, the project team needs to know while there is still an opportunity to adjust arrangements.

Understand the cost and programme trade-offs

Phasing may reduce the need for external accommodation, but it can introduce other costs. Repeated moves, temporary installations, additional protection and restricted working hours may all affect the budget.

It can also lengthen the programme. Contractors may have smaller work areas, limited access or dependencies between successive phases.

Compare the whole delivery approach, including the operational consequences. A longer occupied refurbishment may be preferable to a full move for one business, while another may benefit from vacating the space and allowing works to proceed more freely.

Our guide to how long an office fit out takes explains the wider programme considerations. For a phased project, the movement of people and availability of work areas become additional factors.

When temporary relocation may be more suitable

Temporary relocation deserves consideration where safe separation is difficult, major service interruptions are unavoidable or remaining work areas cannot support the business adequately.

It may also be more practical where operations depend on uninterrupted connectivity, sensitive equipment or a consistently quiet environment.

There can be a middle ground. Some teams may remain on site while others use temporary accommodation or work remotely during particular activities.

The right approach should follow an assessment of the building, proposed works and operational requirements.

Questions to discuss before choosing phasing

Before committing to a phased commercial office fit out, ask:

  • Where will each team work during every phase?
  • How will occupied areas be separated from the works?
  • Which activities or service interruptions affect the wider building?
  • What needs to happen before each area can be occupied?
  • What additional costs and programme allowances does phasing introduce?
  • What is the alternative if a phase is delayed?

At OP, we help businesses plan office fit out projects around their workplace needs. Discuss your building, operational requirements and refurbishment plans with us to explore a suitable delivery approach.

Frequently asked questions

Can staff remain in the office during a fit out?

Sometimes. It depends on the scope of works, building layout, service requirements and ability to maintain suitable occupied areas. Remaining on site should be assessed before the delivery programme is agreed.

Is a phased office fit out cheaper?

It may reduce temporary accommodation costs, but repeated moves, temporary services and restricted working arrangements can add expense. Compare the full cost of each delivery option.

Can all disruptive work happen at weekends?

Not necessarily. Building access, permitted working hours, contractor availability and the nature of the works can limit this approach. Some activities may also need longer than a weekend.

Does phasing prevent downtime?

Phasing can help manage disruption, but it cannot guarantee uninterrupted operations. Planned outages, testing and contingency arrangements should form part of the delivery plan.

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