Mouse Exterminator on Long Island

As a mice exterminator on Long Island, we tell homeowners they have mice if they see dark rice-sized droppings under the sink or along baseboards, smell a musky ammonia odor in cabinets, hear scratching in walls at night, or find chewed corners on cardboard and pet food bags. Older Nassau County homes offer dozens of interior travel routes through wall voids and pipe chases, while Suffolk County houses backing to woods take on mice through basement rim joists and garage door corners. Kitchens and mudrooms are the most common activity zones. Grease marks along a baseboard indicate an established run and usually mean the population is several weeks old. A single mouse sighting during the day suggests overcrowding and warrants immediate treatment.

Bobby Bugs treats mice on Long Island as an entry-point problem, not a trap problem. Expect a full interior and exterior inspection, professional-grade snap and multi-catch traps in active runs, a written list of every entry point and what to seal it with, and a follow-up inside the 60-day guarantee window.

1. 1Free phone triage confirming what you are seeing and where.
2. 2On-site inspection: interior runs, exterior perimeter, garage, basement or crawl, attic access if reachable.
3. 3Placement of tamper-resistant snap and multi-catch traps in active runs.
4. 4A written entry point list: every gap we find, where it is, and the material that will hold (steel wool with caulk for small gaps, hardware cloth, metal or cement for larger ones).
5. 5Exterior bait stations where appropriate and allowed by your community.
6. 6Follow-up visit inside 60 days to remove trapped mice and confirm activity has stopped.

Most Long Island mouse jobs are cleared in 10 to 21 days, with visible activity dropping within the first week after traps are set. A typical single family house catches the majority of the population inside two weeks, followed by a quiet week or two that confirms the interior is empty. Heavier infestations, or homes with unlimited exterior harborage such as wooded Suffolk lots, sometimes take a second follow-up. The 60-day guarantee covers reintroduction inside that window.

Do mice leave on their own?

To keep mice out of a Long Island home, seal every gap the width of a pencil or larger, since the CDC notes a mouse fits through a quarter-inch opening. Stuff small holes with steel wool held in place with caulk, and close larger ones with lath screen, hardware cloth, metal sheeting or cement, paying attention to where pipes, cables and gas lines enter, the gap under the garage door, dryer vents, and the joint where the foundation meets the siding. Store pet food, bird seed and pantry goods in metal, glass or thick plastic with tight lids, pick up pet bowls overnight, and keep garbage in sealed cans. Outside, the CDC recommends keeping woodpiles and compost well away from the house and off the ground, and trimming vegetation back from the foundation. In older Nassau attached homes and Long Beach apartment buildings, exclusion has to cover the shared voids too, or the neighbors' mice become yours. Bobby Bugs leaves a prevention checklist on every mouse invoice.

Cornell's New York State IPM Program notes that deer mice and white-footed mice spend most of the year outdoors and move into buildings in the fall to nest and get out of the cold.

A mouse can fit through a gap about the width of a pencil, roughly 1/4 inch, according to the CDC. House mice also breed fast. UC IPM reports that a female can have 5 to 10 litters a year of about 5 or 6 pups each, and young mice can breed at 5 to 6 weeks old. That is why it pays to deal with the first signs instead of waiting.

Most house mice stay within about 30 feet of their nest and food, according to UC IPM, so droppings in one cabinet usually mean the nest is close by.

• Levittown

  1947 to 1951 slab capes with attached garages, the single most common mouse call we take.

• East Meadow

  Whole blocks of early 1950s capes and ranches get mice the same week in October, because they share the same gaps.

• Valley Stream

  1920s Gibson-era homes with brick foundations and a century of settled mortar.

• Long Beach

  Apartment buildings and rebuilt post-Sandy lower levels where mice run the shared walls.

• Northport

  Victorian and early 1900s houses on fieldstone foundations above the harbor.

• Holbrook

  1965 to 1975 high-ranches and splits, all with the same garage-door gap.

• Centereach

  A car town with an attached garage on nearly every postwar house.

• Stony Brook

  Student rentals and shared houses around the university where turnover brings mice in.

• Visit our full services list.
• See every area we serve across Nassau, Suffolk, Queens, and The Bronx.
• See our rat extermination page.
• See our wildlife removal and trapping page.
• See our general insect treatment page.
• Guide: How Do Exterminators Get Rid of Mice? The 5-Step Process We Use on Long Island.

Mice extermination cost on Long Island depends on how the mice are getting in and how far they have spread. A Cape Cod in Levittown with one gap at the garage door is a small job; a split-level in Huntington with droppings in the attic, kitchen, and crawlspace takes more traps and more time. The biggest cost driver is how many entry points there are: finding every entry point around foundations, utility lines, and door sweeps, because bait alone never finishes a mouse job. Follow-up trap checks are part of most quotes. Bobby Bugs gives you a free written quote before any work begins, and the number on the invoice matches the quote. Every mice extermination job includes the 60-day written guarantee.