What Changes When Everyone’s on Holiday
When the summer holidays arrive, building occupancy drops sharply. Schools empty out, offices run on skeleton staff, and parts of the public estate go quiet for weeks.
It’s tempting to think a quiet building is a low-maintenance one. The risks don’t disappear when people leave. They change. And some of them get worse precisely because nobody’s there to notice.
Here’s what’s worth watching when your buildings empty out for the summer.
Water systems and the legionella risk
This is the big one, and the one most often overlooked.
Legionella bacteria thrive in water that sits still at the wrong temperature. During normal use, water moves through a building constantly, taps run, toilets flush, systems stay active. When a building empties for weeks, that movement stops. Water stagnates in pipes, dead legs and outlets, and the risk climbs.
The answer is a proper flushing regime. Outlets need to be run regularly through the holiday period to keep water moving and temperatures controlled. It’s a straightforward task, but it has to be scheduled and recorded, not left to chance. For any building responsible for public safety, this isn’t optional, it’s a compliance requirement that doesn’t take a summer break.
Energy quietly draining away
An empty building still costs money to run, often far more than it should.
Heating and ventilation systems set for full occupancy keep running through August, conditioning spaces nobody’s using. Lighting left on timers, IT equipment idling, plant operating at term-time settings. None of it is dramatic on its own, but across a portfolio it adds up to real waste over a six-week period.
The summer is a good moment to review what genuinely needs to run. Adjusting building management systems and energy settings for low occupancy can cut consumption significantly, and it supports the wider sustainability and net zero goals most organisations are now working towards. The buildings don’t need to be comfortable for people who aren’t there.
Security and the unoccupied building
A building that’s empty for weeks is a more attractive target and a more vulnerable one.
Reduced footfall means problems go unnoticed for longer. A break-in, a leak, a failed system, all can sit undiscovered for days when nobody’s walking the corridors. The damage from a burst pipe or an electrical fault is far worse when it’s had a long weekend, or a fortnight, to develop.
It’s worth confirming before the holidays that alarms, access control and any monitoring arrangements are working and that someone is responsible for responding if they trigger. An empty building needs a clear plan for who’s keeping an eye on it.
The case for remote monitoring
This is where the gap between an empty building and a well-managed one really shows.
You can’t have someone physically walking every site every day through the summer. But you can have eyes on your buildings without being there. Remote monitoring lets you track building performance, environmental conditions and system alerts from a distance, so a problem in an empty building gets flagged the moment it happens rather than discovered weeks later.
Our BiO® platform gives estates teams live visibility across their whole portfolio, which matters most when the buildings are standing empty. Spotting a heating fault, a water issue or a security alert early can be the difference between a quick fix and a major repair bill come September.
A simple summer checklist
Managing an empty building well doesn’t require huge effort. It requires a plan. Before the holidays start, it’s worth confirming:
Water systems have a flushing regime in place and someone responsible for it. Heating, ventilation and lighting are adjusted for low occupancy. Security, alarms and access control are tested and working. Someone is named and contactable if a system triggers or a problem arises. Monitoring is in place, so issues get flagged early rather than found late.
None of it is complicated. But the buildings that come through the summer without a nasty surprise are the ones where someone thought about it in advance.
Quiet doesn’t mean hands off
The mistake is assuming an empty building looks after itself. It doesn’t. The risks just shift from the visible, day-to-day ones to the quieter problems that build up when nobody’s watching.
If you’d like support keeping your buildings safe and compliant whatever their occupancy, get in touch.
