A commercial property in Hunters Hill contacted us after one of the tenants reported rodent activity in the roof cavity, with visible evidence of rodents around the outside of the building as well. Our inspection confirmed an active problem: materials chewed and disturbed through the roof space, and live mice in the roof cavity. We installed a targeted baiting program — secured rodent stations in the roof cavity and around the external perimeter — and returned about a month later to significant bait consumption and dead rodents in the external garden areas. With commercial kitchens, cafés and restaurants in the surrounding area, the pressure on a site like this does not go away, so the property is now on a monthly rodent management program. There is currently no reported rodent activity in the roof cavities.
Job at a glance
| Site | Commercial property, Hunters Hill |
|---|---|
| Reported problem | Tenant hearing rodent activity in the roof cavity |
| Also observed | Visible evidence of rodents around the external areas of the building |
| Inspection findings | Chewed and disturbed materials in the roof space; live mice present |
| Work carried out | Targeted rodent baiting program installed |
| Station placement | Secured stations in appropriate roof cavity areas and around the external perimeter |
| Follow-up | Return service approximately one month later |
| Follow-up findings | Significant bait consumption; dead rodents in external garden areas |
| Ongoing | Monthly rodent management program for the property |
| Result | Activity under control; no reported rodent activity in the roof cavities |
What the tenant reported
The first call came through the property, not the pest problem. One of the tenants had been hearing rodent activity above the ceiling — movement in the roof cavity, the kind of noise that is impossible to ignore once you have noticed it and impossible to diagnose from underneath. In a tenanted commercial building that report matters, because the person who hears the noise is rarely the person who can do anything about it, and the roof cavity is almost never confined to one tenancy.
There was a second signal too. Around the external areas of the building there was visible evidence of rodents. That combination — something overhead and something outside — usually means you are not dealing with one animal that wandered in. It means there is a route in, and something worth coming in for. We attended the property to inspect it properly and work out how far the problem actually went.
What the inspection found
Inside the roof cavity there were clear signs of rodent activity: rubbish and materials that had been chewed and disturbed, spread through the roof space rather than sitting in one corner. Chewed material is useful evidence because it is directional — it tells you where animals have been working and, read together with droppings and runways, roughly how long they have been doing it.
We also observed live mice in the roof space during the inspection. That takes the job out of the realm of interpretation. Old droppings can be months stale and tell you about a problem that has already ended; live animals in front of you confirm an active, current infestation, and they set the pace for everything that follows.
The baiting program we installed
To bring the activity under control we established a targeted rodent baiting program. Stations went into appropriate areas within the roof cavity, where the activity was, and around the external perimeter of the property, where the animals were coming from. Treating only the roof would have reduced the population inside while leaving the pressure outside untouched; treating only the perimeter would have left the tenants listening to the same noise. Both lines are needed on a commercial site.
Every station is a lockable, tamper-resistant unit, keyed so it can only be opened by a technician, secured in place so it cannot be moved or tipped, and labelled with our name and number so anyone who finds one knows exactly what it is and who to call. On a property with tenants, staff, deliveries and public access, that is not a detail — it is the difference between a controlled treatment and a liability.
Placement is the other half of it. Stations are set along the routes rodents already use — against walls, behind cover, near the harbourage points the inspection identified — and away from the areas people and pets move through. Rodents travel by edges, not across open ground, so a station in the middle of a courtyard is decoration. A station on the right wall gets used in the first night.
What we found at the one-month service
Approximately one month later we returned to inspect and service every station on the site. There was significant bait consumption across the program, which is the first thing you want to see: it confirms the stations are in the right places, that the animals have found them, and that the treatment is actually reaching the population rather than sitting unused in a box.
We also located dead rodents in some of the external garden areas. It reads as unpleasant, but on a baiting program it is the result you are looking for — direct, physical confirmation that the program is working and that the population is coming down. Finding them outside, in the gardens, is also better than the alternative: rodents that die inside a wall or a ceiling are the ones that turn into an odour complaint weeks later.
Why this site needed an ongoing program
Knocking the population down was the easy part. Keeping it down was the real question, and the answer came from what surrounds this property. There are commercial kitchens, cafés and restaurants in the immediate area, which means a constant supply of the three things rodents need: food, waste and shelter. None of that is within this property’s control, and none of it is going away.
That is the defining feature of commercial rodent work. A house is a closed problem — find the entry, seal it, and you are largely done. A commercial strip is an open one. Clear your site completely and the pressure from next door starts refilling it, because rodents do not recognise property lines, only food and routes. A one-off treatment on a site like this is not a fix; it is a reset button that someone has to keep pressing.
So we recommended an ongoing monthly rodent management program to the property manager, and explained it in those terms: not as an upsell, but as the only arrangement that matches the conditions the building actually sits in.
Where the property is now
The site is serviced monthly. Our technicians inspect, clean and rebait the stations as required, and monitor for any new signs of activity while they are there. The monitoring is the part that earns its keep: a station that suddenly starts taking bait after months of quiet is an early warning, and it gives us weeks of lead time on a problem that would otherwise announce itself as noise in a tenant’s ceiling.
The original rodent problem has been brought under control, and there is currently no reported rodent activity within the roof cavities. For the tenants, that means the noise overhead has stopped. For the property manager, it means a scheduled, predictable service instead of reactive call-outs and complaints — which, on a tenanted commercial building, is the result that actually counts.
Photos from this job
Click any photo to enlarge it. A secured external station opened for servicing, and the lockable, branded stations we install on commercial sites.
What this job shows about commercial rodent control
- A tenant hearing noise overhead plus visible evidence outside usually means an established route in, not a one-off animal.
- Live mice seen during the inspection confirm an active infestation; old droppings alone can describe a problem that has already finished.
- Baiting the roof cavity and the external perimeter together treats the population inside and the pressure feeding it from outside.
- Lockable, keyed, secured and labelled stations are what make baiting workable on a site with tenants, staff and public access.
- Significant bait take at the one-month service, and dead rodents found in the gardens, confirmed the program was working.
- Near commercial kitchens, cafés and restaurants the pressure is permanent, so monthly servicing keeps the site clear and flags new activity early.
Common questions
How do I know if the noise in my roof is rats, mice or a possum?
You often cannot tell from the sound alone, which is exactly why an inspection matters. Possums are heavier and tend to be noisy at dusk and dawn; rodents are lighter, faster and active through the night. The reliable answer comes from the roof cavity itself — droppings, chewed and disturbed material, runways and nesting debris all identify the species, and sometimes, as on this job, you see the animals themselves. Treating the wrong one wastes a visit, and possums are protected in NSW and must be handled differently.
Where do you put rodent stations in a commercial building?
Along the routes the rodents already use, not where it is convenient. Internally that means appropriate areas of the roof cavity and other harbourage points the inspection identifies; externally it means the perimeter of the building, against walls and behind cover. Rodents travel by edges rather than across open ground, so a station placed on the right wall gets found quickly while one in the open may never be visited. Stations are kept away from areas people and pets move through.
How long does a rodent baiting program take to work?
You usually see the first clear evidence at the follow-up service a few weeks in — on this job we returned at about one month and found significant bait consumption and dead rodents in the external garden areas. Bait take tells you the stations are in the right places and the population is engaging with the program. Bringing an established infestation fully under control takes more than one visit, which is why the service interval matters as much as the initial treatment.
Is rodent baiting safe around staff, customers and pets?
The control is the station, not just the bait. Every unit is lockable and tamper-resistant, keyed so only a technician can open it, secured in place so it cannot be moved or tipped over, and labelled with our details. Bait sits inside, inaccessible, and stations are positioned away from the areas people and pets use. On a tenanted commercial property with deliveries and public access, that housing is the part that makes the program workable.
Why does a commercial property need an ongoing monthly program?
Because the pressure is external and permanent. This property sits near commercial kitchens, cafés and restaurants, so food, waste and shelter are continuously available in the surrounding area — none of it within the building’s control. Clear the site once and the surrounding pressure starts refilling it. Monthly servicing keeps protection continuous and, just as importantly, catches new activity early: a station that suddenly starts taking bait flags a problem weeks before anyone hears it in a ceiling.
Will baiting leave dead rodents and a smell in the building?
On this job the rodents we found were in the external garden areas, which is the outcome you want. Rodents that have been feeding at perimeter stations tend to die near their harbourage outside rather than inside the structure. It is not guaranteed — an animal that dies in a wall or ceiling cavity can cause an odour, and that is a separate job to locate and remove. Station placement that draws activity to the perimeter rather than deeper inside the building is what reduces the risk.
Rodent noise in the roof at your property? Get it inspected properly.
Elite Pest & Termite Solutions is licensed (NSW 5122967) and fully insured, running one-off treatments and scheduled commercial rodent programs across Sydney. Fixed quote confirmed before any work begins.