The short version
Trap the ones inside, then seal the gaps. An inspection usually costs $75–$250.
- Look for droppings, gnaw marks and night-time scratching.
- Around New Brunswick, mice usually start moving indoors in September and October, as nights get colder.
- Traps remove them; sealing keeps them out.
- Never sweep or vacuum droppings dry.
Anyone in New Brunswick dealing with mice or rats, or hoping to keep them out.
What to look for
A mouse fits through a gap the size of a dime. Seeing one in daylight usually means there are more. Rodents are mostly unseen. You hear them at night and find droppings by morning.
- 1Small dark droppings on top of the water heater.
- 2Droppings in drawers, pantries, under sinks, or along walls.
- 3Tracks or tail drag marks in dust or flour.
- 4Fresh gnaw marks on door corners or garage weatherstripping.
- 5Shredded paper, fabric, or insulation gathered into a nest.
- 6Chewed holes in the bottom of cabinets or drawers.
Why it’s worth acting soon
- Mice breed fast, every few weeks.
- Droppings and urine contaminate food and insulation.
- Gnawed wiring can be a fire risk.
- Nests and odor get harder to clean the longer they stay.
Treatment options and typical costs
Inspection and Entry-Point Mapping
$75–$250
Expect a flashlight, a mirror, and a lot of crouching. In New Brunswick homes, the usual entry points are garage door corners, dryer vents, gaps around pipes, and roof-to-fascia joints.
- Time
- 60–90 minutes
- Best for
- Every job; nothing else works without it
Snap-Trap Program
$150–$400 per visit
Traps are preferred indoors over poison because there is no carcass rotting in a New Brunswick wall cavity. They remove catches and adjust trap positions between visits.
- Time
- 30–60 minutes per visit, 2–4 visits
- Best for
- Active indoor infestations; fast results you can see
Tamper-Resistant Exterior Bait Stations
$100–$300 setup, $40–$80 per service visit
Locked bait stations around a New Brunswick home's perimeter reduce the outdoor rat population before it reaches the walls. Anchored and locked, they keep children, pets, and wildlife out.
- Time
- 30–45 minutes per visit, ongoing
- Best for
- Outdoor rat pressure; ongoing perimeter protection
Sealing and Rodent-Proofing
$200–$1,500, more for large or complex homes
Mice fit through quarter-inch gaps; rats need only half an inch. That's why New Brunswick sealing work goes beyond the obvious holes to weep holes, vent screens, and garage door corners.
- Time
- 2–6 hours, sometimes a full day
- Best for
- Stopping re-entry for good; the lasting fix
Prices are typical published ranges. Ask what’s included before you compare quotes.
Under the sink is the first place to check: the hole where the pipe passes through the cabinet back is often cut much bigger than the pipe.Which rodents live around New Brunswick.
They burrow along foundations and enter low. Norway rats are the other usual suspect. They're small, curious and breed quickly. House mice are the most common rodent in New Brunswick homes.
When they move in.
Small problems grow fast. Spring is breeding season. Check for gaps before then.
Fall is when rodents head indoors. Leaf piles against the foundation hide burrows and gaps, so clear them and walk the wall before the first cold snap.How they get into houses here.
Homes from New Brunswick out to Edison and Woodbridge share the same weak spots, so the checklist below works across the area. Window wells need covers or screens. Look at the dryer vent flap. Check where pipes and cables enter. Rodents use gaps around utility lines, dryer vents and window wells. Plenty of homes in New Brunswick have basements.
A year of rodents in New Brunswick.
- Summer: with highs around 86°F in New Brunswick, rodents look for water. Fix drips and leaks. - Spring: breeding season. Act on any sign quickly. - Winter: with lows near 25°F in New Brunswick, check the attic, garage and pantry for droppings. - Fall: mice move indoors as nights cool. Seal gaps in September.
Mice or rats?
- Rub marks: rats leave greasy smudges along walls and beams. - Behavior: mice are curious about new traps. Rats avoid them for days. - Sounds: mice sound light and quick. Rats sound heavier. - Holes: mice chew dime-sized holes. Rats chew holes closer to quarter-sized. - Droppings: mouse droppings are rice-sized. Rat droppings are two or three times bigger.
Sealing small gaps yourself.
- Check your work: daylight through a gap means it isn’t sealed. - Expanding foam: fine on top of mesh, useless on its own. - Door sweeps: close the gap under garage and exterior doors. - Hardware cloth: use quarter-inch mesh over vents and larger holes. - Sealant or mortar: cover the mesh so it stays put. - Steel wool or copper mesh: pack it into small gaps first.
Cleaning up droppings safely.
- Wash your gloved hands, then your hands. - Don’t sweep or vacuum droppings dry. It stirs up dust. - Wipe up with paper towels and bag them. - Spray droppings with a bleach solution, then wait five minutes. - Wear rubber or plastic gloves. - Air the room out for 30 minutes first.
What happens at an inspection.
Photos help. You should come away with a list of entry points. Inside, they check the kitchen, garage and attic. They check the foundation, vents, rooflines and utility gaps. The inspector walks the outside first. Most inspections take about an hour.
Rodents in the car.
Clear birdseed and pet food from the garage. Check the air filter box for nesting. Park in a closed garage when you can. Mice and rats nest in engine bays and chew wiring.
Bird feeders and rodents.
Store seed in a metal can with a tight lid. If rodents show up, bring feeders in at night. Use a seed tray and sweep up spills. Spilled seed feeds mice and rats.
Questions to ask before you sign.
- Will you use poison inside? (Ask them not to.) - Is cleanup included, or extra? - What happens if they come back? - How many trap visits are included? - Which gaps will you seal, and with what? - Where are they getting in?
Rodents by the numbers.
Around New Brunswick, ask any provider to show you the entry points and the plan before you compare numbers. Around New Brunswick, those three findings — species, entry points, and scale — are what a quote should be built on, not a regional average. Around New Brunswick, what actually matters is a walk-through: where the droppings are, how the rodents are getting in, and how large the colony is. National surveys set rough expectations but cannot diagnose one house.
What affects the price
- Number of entry points found during inspection.
- Sewer line inspection if rats are entering underground.
- Home size, stories, and roofline complexity.
- Materials used for sealing: mesh, sheet metal, mortar.
- Crawlspace or slab; crawlspaces add labor.
- Exterior bait stations and ongoing service frequency.
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What's your biggest concern about rodents?
When to call for help
Call if you hear them in the attic or walls. Droppings in several rooms are another sign. So is a dead-rodent smell. Call right away if you see rats. They take a longer, more careful approach. Attic cleanup is hard to do safely without training.
What you can do yourself
Seal small gaps with steel wool and sealant. Rooflines, vents and attics are harder. That's where a pro's sealing work pays off. Start tonight with snap traps along the walls. Bait them with peanut butter. Store food in sealed bins.
Rodents in New Brunswick
New Brunswick gets about 48 inches of rain a year, and heavy storms flood burrows, which pushes rats toward buildings. Winter lows average around 25°F in New Brunswick, and that cold is what sends mice looking for a way in. In denser parts of New Brunswick, rats travel along alleys, fences and utility lines, so neighbors often share the problem. A typical home in New Brunswick is worth around $350k, and chewed wiring or soiled insulation can get expensive.
Local research
Rodents in New Brunswick, NJ: what the public record shows
Before you compare quotes, it helps to know which rodents actually live in New Jersey, when they are busiest around New Brunswick, and what the state figures look like. Everything below links to the agency or university page it came from.
Hantavirus in New Jersey
The state health department still lists rodent infestation in and around the home as the primary exposure risk.
New Jersey Department of HealthRodent species recorded in New Jersey
- House mouse (Mus musculus) — Enters at 1/4 inch; 5-10 litters per year; eats about 200 small meals a night.
- Norway rat (Rattus norvegicus) — Burrowing rat of basements, sewers and ground floors; tail shorter than head plus body.
When rodents are busiest around New Brunswick
Fall entry (Sept-Nov). Norway rats and house mice move indoors as temperatures drop.
Based on New Brunswick’s humid subtropical climate profile.
New Jersey's commercial pesticide program began in 1975 under the NJDEP Bureau of Licensing and Registrations; applicants pass a Core exam then add categories such as 7A.
Rules that apply in New Jersey
For context, nationally
- 1/4 inch (the width of a pencil) — Smallest gap a mouse can enter. CDC
- 890; 35% fatal; 94% west of the Mississippi — Hantavirus cases reported since 1993 (through 2023). CDC
Sources: New Jersey Department of Health; Rutgers Pest Management Office, Rutgers, The State University of New Jersey; CDC; Pest Notes: House Mouse; Pest Notes: Rats. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep rodents away
- Seal the gap where the garage slab meets the wall.
- Keep garbage in lidded cans and pick up fallen fruit.
- Fit garage doors with tight bottom seals and corner guards.
- Store pet food and birdseed in sealed metal containers.
- Declutter garages and attics to remove nesting cover.
- Cover dryer and exhaust vents with metal louvered covers.
After sealing, a few monitors or unset traps left along the walls tell you whether anything is still getting in before you hear it again.Did you know?
Around New Brunswick, rats are strong swimmers and can tread water for a long time, which is why they sometimes travel sewer lines.
Male house mice sing ultrasonic songs that humans can't hear.
Questions people ask
Are rats a bigger problem than mice?
Usually. Rats are bigger, chew more, and avoid new traps for days. They also tend to need more sealing work outside.
Do I need to replace attic insulation?
Only if it's heavily soiled or flattened by nesting. Light activity can often be cleaned up. Ask the inspector to show you before you agree to replacement.
What should be in a rodent control quote?
Entry points, sealing materials and the number of trap visits. It should say what happens if they return. Cleanup should be listed separately.
What is rodent-proofing and why does it cost so much?
It means sealing every gap with metal mesh and sealant. A mouse fits through a dime-sized gap, so it's slow work. It's also the part that keeps them out.
How do I choose a rodent control company?
Make sure they're licensed in New Jersey. Ask how they seal gaps and what materials they use. Ask what happens if rodents come back. A good company talks about sealing, not just traps.
How common are rodent problems in U.S. homes?
Very common. If you have found a mouse in the house, you are in a large club: 49% of U.S. homeowners in a 2022 NPMA/Harris Poll reported a rodent encounter at some point in their lives.
Do wealthier homes get fewer mice and rats?
Not according to homeowner surveys. Around New Brunswick, rodents do not check tax returns: 52% of U.S. homeowners earning $100,000 or more reported a lifetime rodent encounter in the 2022 NPMA/Harris Poll, no lower than homeowners overall. Before any work starts in New Brunswick, ask how many visits the price covers and what happens if rodents return.
Are rodents a problem in New Brunswick?
They're common here, as almost everywhere. House mice cause most problems.
Nearby cities
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Sources (11)
The facts in this article come from the public sources listed above. Every home is different, so ask the company you talk to about pricing and what’s included. Published by Rodent Exterminator · Updated September 11, 2026 · How we write these guides