If it feels like rats and mice have been harder to shift this year, it is not just you. Pest operators across Melbourne have been reporting a genuine increase in rodent activity through late 2025 and into 2026, and the pattern is showing up consistently enough that it is worth understanding what is actually driving it. Anyone searching for rodent control in Melbourne right now is not imagining the problem. Call volumes for rats and mice are up across the city, and the causes trace back further than most people would expect, to a run of unusually warm, wet weather more than a year ago that is still working its way through rodent breeding cycles today.
A Warm, Wet Autumn Started the Chain Reaction
The story really begins with the autumn of 2024. Eastern Victoria experienced a warmer and wetter autumn than usual, which extended the active feeding and breeding season for both Norway rats and house mice by an estimated six to eight weeks beyond what would normally be expected. Populations that would typically start dying back by May stayed elevated well into winter. That single season set off a chain reaction. A larger than usual population went into spring 2025 with less natural die off behind it, which meant more breeding pairs, which meant a bigger baseline population heading into 2026. Rodents breed quickly under the right conditions, and a single female house mouse can produce hundreds of offspring across an eighteen month lifespan, so a population that starts even slightly ahead of normal can compound fast.
This is not a one suburb problem. It is a citywide shift in the baseline number of rodents Melbourne is carrying into each new season, and it means the usual seasonal dip homeowners rely on to keep numbers in check has simply not happened the way it normally would.
Why Some Melbourne Suburbs Are Feeling It More Than Others
While the weather driven population increase is citywide, the way it shows up varies a lot from one part of Melbourne to another, largely because of geography and housing stock. Suburbs close to bush corridors and creek lines tend to see rodents move from established outdoor populations into nearby homes as those populations grow and food becomes harder to find outdoors. In Glen Iris, the Gardiners Creek corridor and the suburb’s mature, century old gardens give rodents an easy path from parkland into established roof cavities. Brunswick sees a similar pattern along Merri Creek, compounded by older terrace housing where shared party walls let rodents move between several adjoining homes rather than staying in just one.
Inner suburbs with dense, older housing carry their own pressure. Richmond’s mix of narrow Victorian terraces, converted warehouse apartments, and public housing towers gives rodents several very different types of access points in a small area, while South Yarra’s proximity to the Royal Botanic Gardens and Fawkner Park keeps a steady population close to some of the city’s most densely lived in streets. Out in Melbourne’s growth corridors, the picture is different again. In Craigieburn, ongoing estate construction continues to disturb rodent habitat in surrounding paddocks and grassland, pushing displaced populations toward the nearest available shelter, which is often a newly built home. And in Dandenong, the scale of the industrial estate and the density of food premises around Dandenong Market create constant food and shelter opportunities that keep numbers high year round, independent of the weather pattern affecting the rest of the city.
Signs Your Property May Already Be Affected
Rodents are good at staying hidden, so the first sign is rarely seeing one directly. Droppings along skirting boards or in cupboards, greasy rub marks along walls and beams where rats repeatedly travel the same route, scratching noises in the ceiling or wall cavities at night, and chewed packaging or wiring are all common early indicators. Roof rats in particular are strong climbers and tend to settle into ceiling voids and wall cavities, while house mice will exploit almost any gap the width of a pencil to get inside. Left unaddressed, rodents can cause real damage to insulation, wiring, and stored belongings, and they carry health risks through contamination of food preparation areas.
Why a Coordinated Approach Matters More This Year
With baseline populations elevated across the city, a single round of baiting is less likely to hold on its own than it might have in a quieter year. This is where a broader pest control in Melbourne strategy matters, one that looks at entry points, food sources, and nesting sites together rather than treating a rodent sighting as an isolated event. Sealing gaps around eaves, vents, and subfloor access, removing outdoor food sources such as accessible bins and pet food, and combining bait placement with an actual inspection of how rodents are getting in gives far more durable results than reactive treatment alone. Given how quickly a small population can rebuild under the conditions Melbourne is currently seeing, prevention and entry point sealing are doing more of the work than they used to.
Getting Ahead of the Problem
If you have noticed more activity than usual this year, you are seeing the same pattern pest professionals across Melbourne are reporting, not an isolated issue with your property. Given how elevated baseline populations are heading into this year’s breeding season, addressing early signs now, rather than waiting for a fuller infestation to develop, is the more effective and usually the more affordable path. Enviro Safe Pest Control provides thorough rodent removal in Melbourne, combining inspection, entry point sealing, and targeted treatment to deal with the cause of an infestation rather than just the symptoms. We service properties across Melbourne, including Richmond, Dandenong, Craigieburn, Glen Iris and Brunswick, along with the surrounding suburbs. Call 1300 997 272 today to arrange an inspection and get on top of the problem before it grows further.
Frequently Asked Questions
1.Why are there more rats and mice in Melbourne this year?
A warmer, wetter than usual autumn in 2024 extended rodent breeding and feeding activity well beyond its normal season, which meant less natural die off heading into 2025. That left a larger baseline population going into 2026, and it is showing up as increased rat and mouse activity across the city.
2. How do I know if I have a rodent problem and not just seen one mouse?
A single sighting can be a one off, but droppings along skirting boards, greasy rub marks on walls or beams, scratching in the ceiling at night, and chewed packaging or wiring all point to an established population rather than a stray visitor.
3. Is it worth calling a professional, or can I handle it with shop bought bait?
Shop bought bait and traps can reduce numbers temporarily, but with baseline populations elevated across Melbourne this year, an unsealed entry point usually means the population rebuilds quickly. A professional inspection that identifies and seals entry points alongside treatment tends to hold far longer than bait alone.
4. Are rats and mice in the house actually a health risk?
Yes. Rodents can contaminate food preparation surfaces and stored food, and their droppings and urine are linked to the spread of bacteria and disease. They also pose a fire risk by chewing through electrical wiring inside wall and roof cavities.
5. How much does rodent control cost in Melbourne?
Cost depends on the size of the property, how many entry points need sealing, and whether the infestation is confined to one area or spread through the roof and subfloor. Enviro Safe Pest Control provides an obligation free quote after every inspection, with no hidden charges. Call 1300 997 272 to arrange one.