Backyard mosquito treatment for Sydney homes, childcare centres and venues: breeding sites removed or treated and resting areas misted, from $119.
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Mosquitoes in a Sydney backyard come from two places. Some breed right there, in pot plant saucers, blocked gutters, an unscreened rainwater tank or a green pool. Others fly in from saltmarsh and wetlands along the Georges, Parramatta and Hawkesbury rivers and Botany Bay, sometimes over long distances. Knowing which you have decides what will work.
Adult mosquitoes spend the day resting in cool, shaded, humid foliage: under hedges, in dense shrubs, beneath decks and along damp side passages. That behaviour gives treatment a target. We mist those resting areas with a registered residual product and deal with every water source we can find, either by removing it or treating water that cannot be emptied.
Treatment lowers mosquito numbers in your yard for weeks, which makes outdoor living far more comfortable, but it does not replace personal protection. NSW Health advises repellent and covering up, especially around dawn and dusk, and we will always tell you the same.
Species matters because it tells us whether mosquitoes are breeding on your property or flying in.
A freshwater breeder of wetlands, flooded grass and ponds that bites mainly from dusk into the night. It is an important carrier of mosquito-borne viruses in Australia, including Japanese encephalitis.
Breeds in estuarine saltmarsh after high tides and rain, then flies well inland. It is behind summer bite plagues in suburbs near mangroves and wetlands, and can carry Ross River and Barmah Forest viruses.
The whining mosquito in the bedroom at night. It breeds in polluted or nutrient-rich water: blocked drains, septic and stormwater pits, neglected tanks and buckets.
Established in the Torres Strait but, according to published surveillance, not established on mainland Australia. In Sydney yards the similar-looking native Aedes notoscriptus fills the container-breeding role.
Photo from an Elite job: an outdoor pool area on a commercial program. A well-run chlorinated pool is not a problem. Neglected pools, pool covers holding water and ornamental ponds without fish can be.
Photo from an Elite job: a childcare outdoor play area treated with child-safe products. Sandpit covers, toys and planters are checked for water, and treatment is timed for when children are not on site.
Most backyard mosquitoes can breed in a surprisingly small amount of water. This is what we look for on every visit.
| Breeding site | Why it breeds mosquitoes | What to do |
|---|---|---|
| Pot plant saucers, buckets, toys and tarps | Small still pools that refill every time it rains or you water | Tip out weekly, store upside down or under cover, fill saucers with sand |
| Blocked gutters and box gutters | Leaf litter holds water out of sight for weeks | Clean gutters, check falls, fit gutter guard |
| Rainwater tanks | Missing or torn inlet and overflow screens let mosquitoes in to lay eggs | Fit fine mesh screens and repair gaps in lids |
| Bird baths, pet bowls and water features | Clean water left standing for more than a few days | Empty and wipe out at least weekly; keep water moving or stock ponds with fish |
| Stormwater pits, drains and septic systems | Nutrient-rich water suits house mosquitoes | Keep grates clear and drains flowing; seal or screen septic vents |
| Unused or green pools and pool covers | A neglected pool can produce very large numbers | Keep chlorinated and filtered; drain water pooling on covers |
| Water-holding plants and tree hollows | Plant leaf bases and hollows hold rainwater | Flush plants regularly; we can treat hollows that cannot be drained |
More ideas in how to reduce mosquitoes in your backyard.
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A pest treatment reduces mosquito numbers around your home. It does not replace the protection advice from NSW Health.
NSW Health lists Japanese encephalitis, Ross River virus, Barmah Forest virus, Kunjin virus and Murray Valley encephalitis among the viruses spread by mosquitoes in NSW. NSW Health runs mosquito and virus surveillance each season, usually from about November to April.
NSW Health advises using a repellent containing DEET, picaridin or oil of lemon eucalyptus on exposed skin, wearing loose, light-coloured clothing with long sleeves and pants, and taking extra care around dawn and dusk, when most NSW mosquitoes are active.
A vaccine is available for Japanese encephalitis, and NSW Health offers it free to people in eligible groups. Ask your GP or pharmacist whether you qualify. There is no vaccine for Ross River or Barmah Forest virus.
Seek medical advice if you develop fever, headache, rash, joint pain or muscle aches after mosquito bites. If someone becomes confused, very drowsy or has a seizure, call 000.
Water first, then the shady places adult mosquitoes rest during the day.
We walk the whole property, including gutters, tanks, drains, pits, pot plants, water features and neighbouring wetland exposure.
Water that can be tipped out is emptied on the spot, and you get a list of fixes such as tank screens and gutter cleaning.
Water that cannot be emptied, such as pits, drains and tree hollows, is treated to stop larvae becoming biting adults. Fish ponds are left alone.
A residual product is misted onto the undersides of leaves in shaded shrubs, hedges, under decks and along fence lines where adults rest.
We explain how long results usually last in your conditions and when to re-treat through the season or before an event.
| When | What is happening | Best action |
|---|---|---|
| September to October | Warmer days; first backyard breeders appear in containers | Clean gutters, screen tanks, tip out anything holding water |
| November to December | Numbers climb, surveillance season starts, storms fill containers | Book a yard treatment before holidays and events |
| January to March | Peak season, with saltmarsh mosquitoes after big tides and rain | Re-treat as advised, keep up weekly water checks, use repellent |
| April to May | Numbers usually ease as nights cool | Keep drains clear and fix any water problems found in summer |
| June to August | Few biting mosquitoes outdoors | Good time for gutter guards, tank screens and drainage fixes |
Weekly water checks are the single biggest thing a household can do.
A trained eye for hidden breeding sites, products that are not sold to the public for resting-area misting, and larval treatment of pits and hollows you cannot drain.
A mosquito-free yard. Wind, rain and wetlands nearby bring new mosquitoes in. Treatment reduces numbers; repellent protects the person.
Schools, childcare centres, sporting clubs and hospitality venues can combine mosquito work with a commercial pest program.
Mosquitoes can go from egg to adult in about a week in warm weather, so a weekly check breaks the cycle.
Sydney's mosquito problem is really several problems. Homes near the mangroves and saltmarsh of the Georges River, Botany Bay, the Parramatta River and the lower Hawkesbury deal with saltmarsh mosquitoes flying in after big tides. Leafy suburbs on the North Shore and in the Hills breed their own in gutters, tanks and pot plants. New estates in the North West and South West often have detention basins and wet drainage nearby.
Read when mosquito season starts in Sydney. Spending more time in the garden near bushland? Ask about tick control at the same visit.
Reviewed by Ismail, Founder · NSW Pest Management licence 5122967 · Updated September 2026
We look for water before we pick up a sprayer.
Fish ponds are left alone, and flowering plants are avoided while bees are foraging.
Parties, weddings and outdoor events booked a few days ahead.
Backyards, schools, childcare centres and hospitality venues.
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Everything you need to know before you book. Still unsure? Call us — we're happy to help.
Get a Free QuoteMosquito treatment starts from $119. The fixed price depends on the size of the yard, how much dense vegetation needs misting, the number of breeding sites and whether you want repeat treatments through summer. We confirm the price and any warranty terms in writing with your quote.
It varies with weather, rain, how quickly plants grow and how many mosquitoes fly in from nearby wetlands. Heavy rain and new growth shorten it. Your technician will explain what to expect for your property and when to book again, and treating breeding sites makes results last longer.
Mosquitoes build up with warm weather from spring and are worst through summer and early autumn, especially after rain or very high tides. NSW Health runs its mosquito and virus surveillance season from around November to April. Booking a treatment in late spring gets ahead of the peak.
We use APVMA-registered products applied to label. Children and pets stay inside until sprayed foliage is dry, usually a few hours. We do not spray over fish ponds, veggie gardens being harvested or flowering plants bees are working, and we cover or move pet bowls first.
Suburbs near saltmarsh and mangroves on the Georges River, Parramatta River, Botany Bay and the Hawkesbury receive saltmarsh mosquitoes that breed after high tides and rain, then fly inland. You cannot treat the wetland, so the focus is resting-area misting, screens and personal protection.
NSW Health recommends repellents containing DEET, picaridin or oil of lemon eucalyptus, applied to all exposed skin and re-applied as the label directs, especially after swimming. Check product labels for use on young children. Wearing long, loose, light-coloured clothing adds protection.
They may make a small area feel better for a while, but they do little about mosquitoes breeding in your gutters or resting in your hedges. Removing standing water, treating resting areas, fitting screens and using a proper repellent do far more to cut bites.
Yes. We usually recommend treating a few days before the event, so foliage is dry and resting mosquitoes have contacted the product. Tell us the date, the area guests will use and whether there are pools, ponds or food gardens nearby.
They can if mosquitoes get past the inlet or overflow. Tanks should have intact fine mesh screens on every opening and a sealed lid. We check tanks during inspection and point out any gaps. We do not add insecticide to drinking water tanks.
Most mosquito bites in Sydney cause nothing more than an itch, but NSW Health does warn about mosquito-borne viruses each season. Follow its advice on repellent and covering up, and ask your GP whether you are eligible for the free Japanese encephalitis vaccine.
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