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New Jersey Rat and Mouse Help
Rat and mouse control for New Jersey single-family homes, multi-unit buildings and businesses: an inspection, trapping and removal, then sealing the gaps rodents use to get back in.
Your call reaches a trusted local rodent pro.
Free Inspection · Same-Day Service in Many Areas
Six core services, each linked to its own guide.
At shared walls, basements and the pipe chases that run between floors, as well as the outside walls. New Jersey's maintenance rules for hotels and multiple dwellings require buildings to be made ratproof, including blocking the passages rats use to enter from outside and preventing vermin from travelling vertically through pipe chases. For mice moving inside the walls between units, see the mice in walls guide.
Source: New Jersey Department of Community Affairs, Division of Codes and Standards, accessed 2026
Where to look: Guide to rodent entry points in a house
37.7%
of New Jersey housing units were built before 1960
17.4%
were built before 1940
14.7%
are in buildings with two to four units
21.8%
are in buildings with five or more units
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates, 2020-2024
Newark International Airport
Average low at or below 40F
January, February, March, November and December
Highest average highs
July and August
Trenton Mercer County Airport
Average low at or below 40F
January, February, March, November and December
Highest average highs
July and August
Atlantic City
Average low at or below 40F
January, February, March and December
Highest average highs
July and August
Sussex Airport
Average low at or below 40F
January, February, March, April, November and December
Highest average highs
July and August
Source: NOAA National Centers for Environmental Information (NCEI), 1991-2020
The coastal Atlantic City station is the only one of the four where November's average low stays above 40F, at 43.1F, while Sussex Airport adds April to the months at or below 40F.
Seal gaps before the first cold month. Rodents in fall and winter
Norway rats and house mice in built-up areas, and white-footed mice in suburban and rural homes. Rutgers researchers collected Norway rats and house mice from urban areas in New York, New Jersey, Pennsylvania and Washington, D.C., and the New Jersey Department of Health calls the white-footed mouse the most common woodland mammal in the state, one that readily enters homes, particularly in suburban and rural areas.
Source: Rutgers School of Environmental and Biological Sciences / NJAES Newsroom, accessed 2026; New Jersey Department of Health, Communicable Disease Service, accessed 2026
Rutgers researchers found mutations in a gene linked to anticoagulant rodenticide resistance in about 35% of the Norway rats they sampled, pooled across four areas that include New Jersey. The researchers say it is not yet known whether most of those mutations make the rats less susceptible to the poisons.
Identification and behavior: Norway rat guide
In the same Rutgers study, 84% of the house mice carried at least one such mutation, and the researchers wrote that resistance appears to be much more widespread in house mice than many people realized.
Identification and behavior: house mouse guide
The New Jersey Department of Health says the deer mouse may be found in the far northern parts of the state, while the white-footed mouse, a different species, is common throughout New Jersey.
Identification and behavior: deer mouse guide
Not sure which rodent you have? Compare rat and mouse droppings or see all rodent species.
In an apartment building, the owner, whenever an infestation is in two or more dwelling units or in common areas: New Jersey's maintenance rules for hotels and multiple dwellings put eradication on the owner in that case. Newark and Jersey City also run their own rodent and vermin programs.
Source: New Jersey Department of Community Affairs, Division of Codes and Standards, accessed 2026; City of Newark, NJ, Department of Health and Community Wellness, accessed 2026; City of Jersey City, Department of Health and Human Services, accessed 2026
The Rodent Control Bureau investigates rodent complaints, baits the outside of rodent-infested City-owned vacant buildings and lots, and hands out prevention literature.
The City's vermin control ordinance makes it unlawful for an owner or occupant to keep premises in a rat-infested condition, and it requires immediate measures once the Health Officer gives notice.
Source: City of Newark, NJ (published on eCode360), accessed 2026
The Division of Environmental Health says its public health investigators respond to unsanitary home complaints related to vermin.
Inspect, remove, seal, then check again.
A local rodent pro usually follows these steps. How a call works
1.Call
Say what you have seen or heard, and where.
2.Inspect
Ask to be shown the entry points and signs found.
3.Remove
Trapping, and baiting where it suits the site.
4.Seal
Closing the entry gaps the rodents used.
5.Check
A return visit shows whether the work held.
The provider sets the price after an inspection.
Ask for the price in writing before work starts. How each part of a job is priced
This guide covers the whole state. Browse every state guide
The 12 New Jersey counties in the New York metro hold about 74.5% of the state's July 2025 population estimate of 9,548,215, and the four in the Philadelphia metro, Burlington, Camden, Gloucester and Salem, about 14.6%. The Trenton-Princeton metro, which is Mercer County, had 399,289 residents in the same estimate.
Source: U.S. Census Bureau, Population Division, Vintage 2025
When rodents keep coming back or are out of reach.
Activity returns after trapping
How to know rodents are goneSounds in walls or the attic
Scratching noises guideBurrows along the foundation
Rodent exclusionA business, rental or food area
Commercial rodent controlDroppings to clean up
Safe droppings cleanupGaps you cannot safely reach
Attic rodent removalYes, when the building is infested. Newark's vermin control ordinance requires Health Officer permission before demolition, and a building infested with rodents and insects must be treated with a fumigating compound before demolition begins.
Source: City of Newark, NJ (published on eCode360), accessed 2026
Not where rats can reach it. Section 16:20-9 of Newark's Revised General Ordinances bars leaving pet or animal food where rats can reach it after feeding.
Source: City of Newark, NJ (published on eCode360), accessed 2026
At least once a year. New Jersey's maintenance rules require preventive pest procedures by qualified persons in all hotels and multiple dwellings at least once a year, and more often where infestation keeps recurring.
Source: New Jersey Department of Community Affairs, Division of Codes and Standards, accessed 2026
For conditions they create. N.J.A.C. 5:10-5.4(e) makes occupants responsible for removing conditions under their exclusive control that result from their own activities or may result in infestation.
Source: New Jersey Department of Community Affairs, Division of Codes and Standards, accessed 2026
The Rodent Control Bureau surveys premises block by block and baits properties that show active rodent signs at the time of the survey.
Source: City of Newark, NJ, Department of Health and Community Wellness, accessed 2026
Describe what you found and where in the building.
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