Keeping plans current after a refit

A refit is the moment a building changes faster than anyone updates its record of itself. Walls move, a corridor narrows, a new tenant subdivides a floor, a door is repositioned to suit a layout nobody drew. The work is signed off, the contractor leaves, and the floor plan on file still shows the building as it was the day before the job started. That gap, between the floor as built and the floor as drawn, is one of the most common reasons a building's compliance picture is quietly wrong.

It matters because almost everything else hangs off the plan. Escape route lengths, the position of fire doors and compartment lines, where the dry riser outlet is, which way a final exit opens. If the drawing is wrong, the fire risk assessment built on it is working from fiction, and so is anyone who reaches for the plan in an emergency.

Why the drawing slips behind

Nobody decides to let plans go stale. It happens because updating a drawing sits in a gap between trades. The contractor's job was the physical work, not your record of it. The fire risk assessor visited before the refit, or will visit after, but not necessarily at the moment the layout changed. The managing agent has the new layout in their head and in a few photos on a phone, but not in the file that the next manager will inherit.

The result is a building that is compliant in practice and non-compliant on paper, or worse, the reverse: a plan that still shows a protected route the refit quietly removed. Both are failures of the record, and both are avoidable if updating the plan is treated as part of the works rather than an afterthought.

Treat the as-built as a deliverable

The cleanest fix is to make the updated plan a condition of closing out the refit. The contractor or designer should hand back a marked-up or revised drawing showing what actually changed, and that drawing should be the thing you file, not the original specification. Where a refit touches anything fire-related, the change should trigger a review of the fire risk assessment, because the Fire Safety Act 2021 made clear the assessment must cover the structure, external walls and flat entrance doors, and a refit can affect all three.

A short checklist at handover keeps this honest:

• An as-built plan reflecting the layout actually delivered, not the one tendered.
• A note of any change to escape routes, fire doors, compartment lines or final exits.
• Confirmation that fire-stopping was reinstated wherever the work breached a compartment.
• A trigger to review the fire risk assessment where any of the above changed.
• The superseded plan retained, marked as superseded, so the history is intact.

The buildings that stay current are the ones where this is a routine part of every job, not a special effort reserved for major works. Even a single new partition is a change to the plan.

The high-rise residential case is stricter

For high-rise residential buildings, keeping plans current is not good practice but a duty with a specific audience. Under the Fire Safety (England) Regulations 2022, in force 23 January 2023, responsible persons of high-rise residential buildings must share floor and building plans and external wall system information electronically with the local fire and rescue service, and must keep hard-copy floor plans and a single-page orientation plan in a secure information box for firefighters. A refit that changes a floor and is not reflected in those plans means the fire service is holding a drawing that no longer matches the building they would enter. Updating the plan after a refit, and re-sharing it, is part of meeting that obligation rather than an optional tidy-up. Our note on sharing plans with the fire service covers that handover in more detail.

Keep the model and the building in step

Where a building is held as a 3D model or a BIM record rather than flat drawings, the same discipline applies, with an added benefit: a model carries the relationships between elements, so a change in one place can be checked against everything that depends on it. The risk is that the model becomes a beautiful artefact frozen at handover while the real building moves on. A model is only worth its cost if it is maintained, and a refit is exactly the moment that maintenance is most needed and most often skipped.

The practical answer is to hold the plan, the model and the assessments that depend on them in one place, so that a change recorded once propagates to everyone who reads it. When your building plans live alongside the risk assessments that reference them, updating the plan after a refit is a single deliberate act rather than a scattered set of edits across files that may never all get made.

The smallest version of the discipline

If a full as-built process feels heavy for minor works, keep the minimum: never close a job that changed a layout without changing the plan that describes it. A dated mark-up filed against the building is far better than a pristine drawing that is silently wrong. None of this is legal advice, and obligations vary by building, but as a working rule it holds: the plan should never be older than the building it claims to describe.