Refurbishing a Building While People Are Still In It

Occupied refurbishment fails on logistics rather than on construction. Noise, dust, access, services isolation and tenant relations decide whether it works.

Working in an occupied building converts an ordinary construction project into a logistics exercise with construction inside it. The physical work is familiar. What is unfamiliar is sequencing it so that people can keep living or trading, that nobody loses water or power without warning, and that the dust and noise stay inside agreed limits. The mistakes below are the ones that cost money and goodwill.

Why these keep happening

Projects are planned as construction and only then adapted to the occupants. Programmes are drawn assuming full access, pricing assumes normal working hours, and the tenant conversation happens after the contract is signed. The adaptation then arrives as a series of variations and delays, each one reasonable in isolation, and the project finishes late with relationships damaged on all sides.

1. Pricing the work as if the building were empty

Occupied working means restricted hours, protection to erect and remove daily, materials moved through occupied routes, noise limits during trading or sleeping hours, and productivity well below an empty site. A contractor who priced for an empty building either loses money and starts looking for variations, or cuts the protection measures that made the project tolerable.

• Avoid it by: State the working restrictions in the tender documents and ask bidders to price them explicitly.
• Proof it is closed: A priced preliminaries schedule showing protection, out of hours working and access constraints.

What it costs you: Variations, disputes and a protection regime that quietly degrades as margin disappears.

2. Planning services isolations without a rehearsal

Draining a riser, isolating a board or shutting down cooling affects areas that nobody mapped, because the distribution in older buildings rarely matches the drawings. An isolation that was planned for one floor takes out three, including a tenant with equipment that should never lose power.

• Avoid it by: Trace and prove every isolation before the shutdown, and notify precisely who will be affected.
• Proof it is closed: A signed isolation plan showing the proved extent of each valve and each circuit.

What it costs you: Unplanned outages, damaged equipment, compensation claims and loss of tenant confidence.

3. Underestimating dust and its reach

Construction dust travels through ceiling voids, risers, stair cores and the air conditioning system. Cutting and drilling in one area can leave fine dust across a tenant office two floors away, settling on stock, equipment and food preparation areas. Once it has entered a ducted system, removing it is a specialist clean rather than a wipe down.

• Avoid it by: Seal the work area including the ceiling void, isolate the affected air system and use extraction at source.
• Proof it is closed: Photographs of containment before work starts and a record of air system isolation.

What it costs you: Specialist cleaning, damaged tenant goods and complaints that follow the project for months.

4. Treating fire protection as a construction detail

Refurbishment routinely breaches compartments, disables detection zones and obstructs escape routes with materials. In an occupied building those are not temporary technical issues; they are the protection the occupants are relying on while the work happens. The risk peaks precisely when hot works and combustible materials are present.

• Avoid it by: Prepare a written fire plan for each phase covering detection, escape and temporary protection.
• Proof it is closed: Daily checks recorded on detection coverage, escape route width and hot work permits.

What it costs you: Occupants exposed to real risk, and an inspection finding that can stop the project.

5. Communicating with occupants too late and too vaguely

Occupants tolerate disruption they were told about and resent disruption that arrives unannounced. A notice saying that works will take place over the coming months is not communication. People need to know which week affects them, which services will be interrupted and for how long, and who to call when something goes wrong.

• Avoid it by: Issue a weekly look ahead naming affected areas, dates, times and a single contact.
• Proof it is closed: A communication log with each notice, its date and the areas it covered.

What it costs you: Complaints, obstruction of access, withheld service charge payments and reputational damage.

6. Sequencing by trade instead of by occupied zone

Traditional sequencing sends each trade through the whole building in turn, which maximises efficiency and means every occupant is disturbed repeatedly across the whole programme. Zone based sequencing completes one area fully before moving on, which costs more in mobilisation and disturbs each occupant once.

• Avoid it by: Sequence by zone and finish each one completely, accepting the extra mobilisation cost.
• Proof it is closed: A programme organised by area with a completion date per zone, shared with occupants.

What it costs you: Months of recurring disruption for every occupant, and the complaints that come with it.

A short check before you sign

• Confirm the tender documents stated working hours, access routes and noise restrictions.
• Check that every planned isolation has been physically proved rather than taken from a drawing.
• Inspect dust containment including the ceiling void and the air system isolation.
• Review the fire plan for the current phase and confirm detection coverage and escape widths.
• Read the last three occupant notices and judge whether they are specific enough to act on.
• Compare the programme structure against occupied zones rather than against trades.

If it has already happened

If a project is already causing problems, stop and re plan rather than pushing on. Hold a meeting with the occupants, acknowledge what has gone wrong and present a revised plan with specific dates by area. Re sequence the remaining work by zone even if it costs more, because the alternative is months of continuing conflict. Where tenants have suffered loss, take advice from a licensed adviser on your obligations under the leases before offering anything, and confirm the current requirements for temporary fire protection arrangements with the reviewing authority, since these are reviewed periodically.

Domira works on buildings that already exist: surveying what is installed, specifying the systems that have to be replaced, and running maintenance and refurbishment work around the people using the property. Tell Domira which asset you are responsible for and we will say what we would inspect first.