Rat and mouse control for Auckland homes and businesses

A single visit to a standard house runs about $185 to $260, and a full rodent programme with a verification visit is usually $290 to $420. Larger infestations reaching both the subfloor and the roof space, which need three visits, sit between $450 and $700. Commercial sites are quoted annually. The range reflects the size of the building and how many harbourage points have to be covered, and we confirm the figure in writing after inspecting.

Both rat species are nocturnal and most active in the few hours after dark and again before dawn. Hearing activity during daylight generally means the population has grown enough that competition is pushing animals to forage outside peak hours, which we treat as a sign of an established rather than a recent problem.

Bait is placed inside lockable tamper-resistant stations that are secured in position, so direct access is not the main risk. The real risk is secondary poisoning, where a pet eats a poisoned rodent. That risk is much higher with second generation anticoagulants such as brodifacoum, which is why in households with pets we normally recommend trapping or a first generation product instead. Tell us about your animals and we will plan around them.

It is possible, and we will not tell you otherwise. Anticoagulant baits take several days to work and the animal chooses where it dies. Trapping avoids the problem entirely because the carcass is recovered, which is one of the reasons we suggest traps in occupied bedrooms, in ceiling spaces above living areas and in food premises. A sudden burst of large metallic blowflies in one room often shows where it happened, and our page on flies in the house explains how to tell them from other flies.

Activity climbs sharply from about March as night temperatures fall and outdoor food supply drops, and complaints peak between April and July. Auckland's winters are mild enough that populations do not crash, so a problem left over autumn is usually still there in spring, just quieter.

Generally no. Under the Residential Tenancies Act the landlord must provide and maintain premises in a reasonable state of repair, and rodents entering through structural gaps, damaged subfloor vents or failed drainage is a maintenance matter. Where a tenant's own food storage or rubbish is clearly causing it, responsibility can shift. We provide a written treatment record with findings either way, which is usually what resolves the argument. There is more on who pays for pest control in a rental.

For one mouse, often yes. For rats it usually fails, and the two common reasons are placement and bait shyness. Bait left in the wrong place is simply ignored, and a rat that takes a sub-lethal dose learns to avoid that flavour, which makes the job harder for whoever comes next. If you have already baited without success, tell us what you used, because it changes what we do.

Yes, for the animals living in the building now. A properly placed programme of traps and bait stations usually clears the resident population within a few weeks, and the verification visit at 10 to 14 days is how we confirm it rather than assume it. What no treatment does on its own is stop the next rat arriving, which is why the job ends with a written list of the entry points and what will close them.

Only by keeping them out, because poison removes the rats you have and nothing else. Close every gap over about 12 mm for rats and 6 mm for mice, cut back branches touching the roofline, fit mesh over subfloor vents, and keep pet food, chicken feed and compost in sealed containers. Then keep a trap or two set where they used to run. A section backing onto a reserve will always see new arrivals, and there a maintained trap line is the honest answer.

Nothing that lasts. Peppermint oil and other smell-based repellents are widely sold, but university pest guidance finds no repellent that has kept rats away for more than a short time, and plug-in ultrasonic units fail because rats quickly get used to the sound. What actually moves them on is removing the food and shelter around the house and blocking the route in.

In the garden it is usually a cat, and in the wider landscape morepork, kāhu (the swamp harrier), stoats and ferrets all take rats and other rodents. That food chain is the reason we are careful with bait. A predator that eats a rat carrying a persistent second generation anticoagulant takes in the poison too, so in suburbs with native birds we lean on traps and less persistent products.