A commercial office in Redfern called us after staff noticed a strong, persistent odour in one of the workspaces — bad enough that the area was difficult to use. Our inspection picked up increased fly activity around the kitchen, particularly above the cupboards, which narrowed the source to a wall cavity. Using a small inspection camera we confirmed a dead rodent inside the cavity. We created careful access, removed and safely disposed of the animal, treated the area with an odour control product and sealed the access point. The smell was resolved, and the office is now on a monthly rodent management program.
Job at a glance
| Site | Commercial office, Redfern |
|---|---|
| Reported problem | Strong, persistent odour in one workspace, making it difficult to use |
| First clue | Increased fly activity around the kitchen, particularly above the cupboards |
| Source | Dead rodent inside a wall cavity, confirmed with an inspection camera |
| Work carried out | Careful access created, animal removed and safely disposed of |
| Odour treatment | Area treated with an odour control product |
| Prevention | Access point sealed |
| Result | Odour resolved |
| Ongoing | Monthly visits — existing stations checked and re-baited with a first-generation bait |
The call: a smell with no obvious source
Staff in one of the workspaces reported a strong, persistent odour. It was not a drain, it was not the bins, and it did not clear with airflow. In the end the room was simply difficult to use — which in a working office is not a minor inconvenience, it is a room you are paying rent on and cannot occupy.
A dead rodent in a wall cavity is one of the most common causes of exactly this complaint, and one of the hardest for a building manager to resolve, because the smell carries along the cavity and does not reliably announce where it is coming from. Cutting open plasterboard until you find it is expensive, disruptive and usually wrong the first two times.
Finding it: follow the flies, not the smell
During the inspection we observed increased fly activity around the kitchen, particularly above the cupboards. That is the useful signal. Odour spreads through a cavity and leaks out wherever it can, so it points everywhere at once. Flies behave differently — they cluster at the actual source, because that is where they are breeding.
That activity narrowed the problem down to a specific wall cavity. From there we used a small inspection camera fed into the cavity to confirm what was inside before touching the wall. The camera found it: a dead rodent, in the cavity, exactly where the fly activity suggested.
That step matters commercially as well as technically. Confirming the source on camera means one small, planned opening in a known location instead of exploratory damage through a working office.
The removal
We created careful access to the cavity, removed the animal and disposed of it safely. The area was then treated with an odour control product — the carcass is the source, but the residue it leaves behind will keep a room smelling for days if it is not dealt with directly.
Finally we sealed the access point: the gap that let the rodent into the cavity in the first place. Removing the animal fixes today. Sealing the entry is what stops the same call in six weeks. The smell was resolved.
Why one dead rodent means a rodent program
A rodent that dies inside a wall cavity was living in that building before it died. It had a route in, a food source and somewhere to nest. Removing the body does not change any of those things, and in a commercial site — staff kitchen, bins, deliveries, shared walls with other tenancies — those conditions tend to be permanent.
So we recommended a proactive rodent management program. Monthly visits include checking and re-baiting the existing stations with a first-generation bait, which keeps protection continuous and, just as importantly, gives an early read on unusual activity: a station that suddenly starts taking bait tells you about a problem weeks before anyone smells one.
For an office, that is the difference between a pest program and a pest emergency. One is scheduled, quiet and costs a known amount. The other is a room full of flies and a day of disruption.
Photos from this job
Click any photo to enlarge it. The inspection camera confirming the rodent inside the wall cavity, and the animal after removal, bagged for safe disposal.
What building and office managers should take from this
- An unexplained odour in one room is very often a dead rodent in a cavity, not a drain or a bin.
- Fly activity marks the spot. Follow the flies, not the smell — odour travels along the cavity and will send you to the wrong wall.
- Confirm with a camera before opening anything. One planned access point beats three exploratory holes.
- Treat the odour as well as removing the animal, or the room still smells.
- Seal the entry point, or you will be making the same call again.
- If a rodent died inside the building, rodents were living in the building. A monthly program with checked and re-baited stations catches the next one early.
Frequently asked questions
How long does the smell from a dead rodent last?
It depends on the size of the animal, the temperature and how well ventilated the cavity is, and it can run for weeks if the source is left in place. Removing the carcass is what ends it; treating the area afterwards with an odour control product deals with the residue that keeps a room smelling once the source is gone.
Can you find a dead rodent without pulling the wall apart?
Usually, yes. We locate it by inspection first, including signs like clustered fly activity, then confirm with a small inspection camera fed into the cavity. That means one small, deliberate access point in a known location instead of opening up wall after wall.
Why were there flies in the office kitchen?
Flies breed on the carcass, so they cluster around the actual source rather than spreading out with the odour. In this job the fly activity above the kitchen cupboards is what narrowed the search to the right wall cavity.
Is a dead rodent in a wall a health risk at work?
It is first and foremost an amenity and hygiene problem: a strong odour and increased fly activity in a workspace, next to a kitchen. It should be removed and the area treated promptly, and the access point sealed so the building is not open to the next one.
What does a monthly rodent program involve?
Scheduled monthly visits where the existing rodent stations are checked and re-baited, in this case with a first-generation bait, plus a look over the site for new activity or new entry points. The value is early detection: the stations tell you about rodent pressure before staff do.
Do you service commercial offices across Sydney?
Yes. Elite Pest and Termite Solutions runs scheduled commercial pest programs for offices, kitchens, retail and strata buildings across Sydney, including Redfern and the inner suburbs. Call 1300 313 373 to talk through a program for your site.
Odour, noise or droppings at your site? Get it found properly.
Elite Pest & Termite Solutions is licensed (NSW 5122967) and fully insured, running one-off treatments and scheduled commercial programs across Sydney. Fixed quote confirmed before any work begins.