If you've lived in Nairobi for any length of time, you've probably had at least one uninvited guest scurry across your kitchen floor or bite you awake at 2 a.m. Kenya's capital, with its mix of dense estates, green suburbs, and a warm, humid climate for much of the year, offers near-perfect conditions for pests to thrive. While dozens of species turn up in homes and offices across the city, a handful show up far more often than the rest — and knowing which ones to expect makes it much easier to keep them out.
Cockroaches Top the List
Ask any Nairobi pest control technician which pest they treat most, and cockroaches will almost always come first. The German cockroach and the American cockroach are both common in the city, thriving in kitchens, drainage systems, and any space with food residue and moisture. They're resilient, fast-breeding, and notoriously difficult to eliminate with store-bought sprays alone, since they hide deep in cracks, behind appliances, and inside plumbing voids during the day. Beyond the discomfort factor, cockroaches are known carriers of bacteria and can trigger allergies and asthma in sensitive households — making professional treatment far more effective than DIY attempts.
Rodents: Rats and Mice
Close behind cockroaches are rats and mice, particularly in older buildings, estates near open drainage, and properties bordering undeveloped land. Nairobi's rapid urban growth has left many neighborhoods with informal waste points that attract rodents in large numbers. Once inside a home, rats and mice gnaw through wiring, contaminate stored food, and reproduce quickly, turning a small problem into an infestation within weeks. Areas like Eastlands, parts of Kayole, and older sections of the CBD tend to report higher rodent activity, though no neighborhood is entirely immune.
Mosquitoes During the Rainy Seasons
Nairobi's two rainy seasons bring a predictable spike in mosquito activity. Stagnant water in flowerpots, blocked gutters, and open drainage channels become breeding grounds almost overnight. While Nairobi's altitude keeps malaria transmission lower than in coastal or lakeside regions, mosquitoes remain a persistent nuisance and a health concern, especially in low-lying areas near rivers and wetlands such as parts of South B, South C, and areas close to the Nairobi River.
Termites in Older Structures
Termites are less visible day-to-day but cause some of the most expensive damage of any pest in the city. They target wooden fixtures, door frames, and structural timber, often working undetected for months before the damage becomes obvious. Properties in leafy, tree-dense suburbs like Karen, Langata, and Runda are particularly susceptible due to the proximity of soil-nesting termite colonies.
Bed Bugs on the Rise
Bed bugs have become increasingly common in Nairobi, particularly in shared accommodation, student hostels, and short-term rental units with high guest turnover. Unlike cockroaches or rodents, bed bugs don't respond to general cleanliness — they hitchhike in luggage, furniture, and clothing, making even well-maintained homes vulnerable.
Ants in Nearly Every Home
Sugar ants and other small ant species are so common in Nairobi kitchens that many residents consider them a normal part of life. They're generally more of a nuisance than a health hazard, but large colonies can be difficult to fully eradicate without locating and treating the nest itself.
Keeping Pests Out for Good
The common thread across all of these pests is that prevention beats cure. Sealing entry points, fixing leaks, clearing standing water, and storing food properly go a long way. But for cockroach infestations, rodent problems, termite damage, or a bed bug outbreak, professional pest control remains the most reliable route to a lasting solution — especially in a city where warm weather and dense housing give pests every advantage.