NYC Spring Pest Prevention Checklist 2026

Spring pest pressure in New York City starts earlier than most residents expect. By the time ants are trailing across kitchen counters in May, the window for easy prevention has already closed. The most effective spring pest control is done in March and April — before colonies expand, before termites swarm, and before the warm rains that drive pest activity into overdrive. This checklist covers what to inspect, what to fix, and when to call a professional.

Exterior Inspection: First Line of Defense

Walk the perimeter of your building or home in March, before plants leaf out. Look for:

• Foundation cracks and gaps: Any crack wider than 1/4 inch can admit mice. Check where utilities enter the building and ensure gaps are sealed with steel wool or hardware cloth backed by caulk. Foam sealant alone is not effective — mice chew through it.
• Weep holes and vents: Foundation weep holes in brick structures are frequent entry points for ants. Screen them with copper mesh. Crawl space vents should have intact screens.
• Wood-to-soil contact: Deck posts, porch supports, and wooden steps contacting soil are prime entry points for termites and carpenter ants. Ensure at least 6 inches of clearance between structural wood and soil.
• Mulch depth: Deep mulch beds against the foundation retain moisture and provide harborage for insects. Keep mulch 6 inches away from the foundation and no deeper than 3 inches.
• Standing water: Any container holding water becomes a mosquito breeding site within days of warming. Eliminate all standing water sources in April before mosquito season begins — including clogged gutters, planter saucers, and low spots in driveways.

Interior Inspection: Kitchen and Utility Areas

• Under-sink cabinet: Check for moisture from slow leaks, gaps around drain pipes, and organic buildup. This is the most common cockroach harborage in NYC apartments.
• Refrigerator and stove: Pull these appliances away from the wall at least once per year. Check for cockroach frass, egg cases, and grease buildup. The space behind the refrigerator motor and inside stove control panels are primary German cockroach harborage zones.
• Pantry and dry goods: Inspect stored grains, cereals, pet food, and dried goods for pantry pests. Infested products should be discarded and containers thoroughly cleaned.
• Basement and utility room: Check for rodent droppings along walls, gnaw marks on cardboard storage, and moisture that attracts pests. Seal any gaps around pipes at floor level.

Spring Action Items by Pest

Termites

Long Island homeowners — particularly in Nassau County and western Suffolk — should schedule a termite inspection in April, before peak swarm season. Subterranean termite swarmers typically emerge in late April through June in New York, often after a warm rain. Mud tubes on foundation walls or swarming winged insects near the foundation are signs of an established colony requiring immediate professional attention.

Ants

Ant colonies that have been building in wall voids and foundation areas over winter become active in March when soil temperatures rise above 50°F. Before you see trails indoors, treat the exterior foundation perimeter with a residual product or schedule professional service. Gel bait applied in spring is more effective than spraying, which repels rather than eliminates colonies.

Mosquitoes

NYC and Long Island see mosquito populations build rapidly once temperatures consistently exceed 50°F at night. Before May 1, eliminate every standing water source on your property. Change bird bath water twice weekly. If your property has low areas that collect water after rain, professional mosquito barrier treatment beginning in May can protect outdoor living spaces through the season.

Stinging Insects

Yellowjacket and paper wasp queens emerge in April to begin nest building. Early-season nests are thumbnail-sized and easy to treat. By July, nests can contain hundreds of insects. Inspect under eaves, in attic vents, along fence lines, and in any void providing shelter. Early treatment of small nests prevents the dramatic summer encounters with large colonies.

Rodents

Spring is an active rodent season in NYC, not just fall. Outdoor populations suppressed by cold become active and exploratory. Spring cleaning and construction that disturbs established colonies can drive rodents into buildings. Always fill any gap or disturbed opening before leaving it overnight.

When to Call a Professional

If you find termite mud tubes, active carpenter ant trails near structural wood, evidence of mice inside the walls, or any active cockroach activity during your spring inspection — do not wait. Early-season professional treatment is almost always more effective and less costly than addressing an established summer infestation. Call Control Exterminating at (212) 696-4164 to schedule a spring inspection.