The short version
Rodent control in Scranton, PA starts with knowing whether you have mice or rats, then sealing the openings they use. Penn State Extension says a mouse fits through a dime-sized hole and a rat through one about the size of a quarter. Close those gaps with copper mesh, hardware cloth and silicone, then trap. Mice move in each fall and stay through winters near 19F.
- Rice-sized pointed droppings mean mice; blunt, raisin-sized droppings mean rats.
- Penn State Extension says a dime-sized gap is enough for a mouse.
- Seal with copper mesh, hardware cloth, silicone sealant and door sweeps before using any pesticide.
- Mice move into Scranton homes in fall and stay in walls and garages all winter.
- Norway rats, house mice and deer mice are the species Pennsylvania lists.
This is for Scranton homeowners who just found droppings in a drawer or along the basement wall, renters hearing something in the ceiling, landlords handling a tenant complaint, and anyone with a garage or shed that collects mice every fall. It is also for people trying to judge whether a rodent quote is reasonable before they sign it.
What to look for
Pennsylvania's species list for rodents is short: the Norway rat, the house mouse and the deer mouse. Across Scranton, house mice cause the most indoor complaints, Norway rats dig in from outside, and deer mice turn up in garages, sheds and outbuildings. Size separates them fast. Penn State Extension puts adult mice at 5 to 8 inches including the long hairless tail, and rats at 13 to 18 inches. Size also sets the entry point: a mouse needs a gap about the size of a dime, a rat roughly a quarter. The weather sets the timing. Scranton summers reach about 82F, and winter lows average around 19F, so mice push indoors as fall cools and stay in walls and garages until spring. Inside, they breed 5 to 10 times a year. Rain matters for rats. About 40 inches a year and average humidity near 70% keep soil workable for burrows along foundations, porches and sheds, and Norway rats forage 100 to 500 feet from those burrows.
- 1Pointed droppings about the size of a grain of rice in drawers, cabinets or along baseboards, which point to mice.
- 2Blunt droppings closer to the size of a small raisin near the basement floor or trash area, which point to rats.
- 3Holes about the size of a quarter chewed through siding, doors or basement walls.
- 4Scratching or scurrying inside walls or above ceilings at night, most often from October on.
- 5Nests of shredded paper or insulation in stored boxes, drawers or behind appliances.
- 6Burrows along the foundation, under a porch or beside a shed.
- 7Gnawed food packaging or a stale, musky smell in a pantry or closet.
Why it’s worth acting soon
- A pair of fall mice can become dozens by spring at 5 to 10 litters a year.
- Chewed wires behind walls are a fire hazard you will not see until something fails.
- Rodent urine and droppings can carry leptospirosis and salmonellosis, two illnesses on the CDC's rodent list.
- Holes chewed to quarter size let rats in where only mice could reach before.
- Soiled insulation and stored goods often have to be thrown out once rodents nest in them.
Treatment options and typical costs
Exclusion with copper mesh and hardware cloth
Quoted after inspection
Closing every dime-sized gap for mice and quarter-sized gap for rats using copper mesh, hardware cloth and silicone sealant, plus door sweeps, which are the materials Penn State Extension names. Exclusion comes before any pesticide under integrated pest management, and it is what stops next fall's wave.
- Time
- Usually one project, with a follow-up check
- Best for
- Every home with repeat fall mice
Snap trapping sized to the rodent
Quoted after inspection
Mouse traps for mice and larger rat traps for rats, placed along walls where droppings and rub marks show travel. Getting the identification right first matters, since a rat can spring a mouse trap without being caught. Traps are checked and moved until captures stop.
- Time
- Until checks find no new activity
- Best for
- Active rodents inside the home
Exterior rat control
Quoted after inspection
Trapping and, if needed, locked bait stations around burrows, trash areas and the foundation, spread to cover how far rats forage. Under Penn State's IPM framing, least-risk products come only after sanitation and exclusion, so ask what product would be used and why.
- Time
- Several weeks plus monitoring
- Best for
- Norway rats burrowing outside
Droppings and nest cleanup
Quoted after inspection
Wet removal of droppings, nests and contaminated insulation following CDC guidance, then disinfection. It is most useful in attics, basements and sheds where rodents lived through the winter.
- Time
- Depends on the area affected
- Best for
- Heavy droppings in attics, sheds or basements
Prices are typical published ranges. Ask what’s included before you compare quotes.
Bathroom vanities hide the same plumbing gaps as the kitchen. A quick look with a flashlight shows droppings or rub marks long before you see a mouse.Mouse or rat: how do you tell from what they leave behind?
Identify first, then plan. Droppings are the fastest answer. Penn State Extension describes mouse droppings as pointed and about the size of a grain of rice, and rat droppings as blunt and closer to the size of a small raisin. If you are finding them in a Scranton kitchen drawer, it is almost always mice. If they are on the basement floor near a drain or the trash, look harder for rats. Body size settles it if you see the animal. Mice run 5 to 8 inches including the tail, while rats are 13 to 18 inches. Holes tell you too: Penn State says mice fit a dime-sized opening and rats need about a quarter, so a fresh quarter-sized hole in a door or wall is a rat sign. Getting this right changes everything that follows. Mouse traps placed for rats get sprung without a catch, and a rat problem nearly always means burrows outside that need attention. A deer mouse in the garage calls for careful cleanup more than a big trapping effort.
What does Penn State's IPM order mean for your house?
For a Scranton homeowner, that means the job starts with food and clutter, moves to sealing, and uses traps before any bait. Prevention is the boring part that works. Store food in hard containers, keep trash lidded, and clear the stacks of cardboard that give mice nesting material. Exclusion is the part that lasts: copper mesh, hardware cloth, silicone sealant and door sweeps over every dime-sized gap. Traps come next because they remove animals without leaving poisoned rodents in walls. Bait, if it is used at all, belongs in locked stations placed by someone trained to use it. Use this order to judge a provider. A plan that opens with poison and says little about sealing is skipping steps. A good written plan should name the openings, the materials, the trap locations and how many follow-up visits are included. Integrated pest management is a sequence, and Penn State Extension lays it out plainly: prevention, exclusion and nonchemical tools first, least-risk products only if they are needed.
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.What happens during a first rodent visit in Scranton?
A careful provider walks the outside of the building first, looking for burrows, rub marks and holes at the foundation, around utility lines, at basement windows and under porches. Across Scranton, where Norway rats burrow through spring and summer, this outdoor check is where rat problems usually announce themselves. Inside, the provider follows the droppings. Rice-sized pointed droppings in cabinets lead to mouse runways along walls and behind appliances. Raisin-sized blunt ones near drains or trash point toward rat entry from below. Attics, garages and storage rooms get checked for nests and soiled insulation. You should come away with a written plan: which openings will be sealed and with what, where traps will go, whether exterior stations are part of it, what cleanup is included and how many follow-ups are scheduled. Ask the provider to show you the biggest gaps they found, since knowing where rodents enter helps you spot new damage later. If the inspection ends with a price but no list, ask for one. Expect an inspection before any treatment.
When are rodents most active in Scranton through the year?
From about September through November, as Scranton highs drop from the low 80s, house mice look for gaps into basements, walls and attached garages. Deer mice do the same in sheds and outbuildings. Sealing in August keeps many of them out. Winter, December through February, is when you hear them. With average lows near 19F, mice that got in stay in walls and ceilings, breeding as food allows. Droppings in drawers and scratching above the bedroom ceiling are the usual clues. Spring, March through May, is cleanout season. Opening a shed or garage that mice used all winter is when droppings get disturbed, so follow the CDC method: air the space out for 30 minutes, soak droppings with a 1 to 9 bleach solution for 5 minutes, then wipe, never sweep. Summer, June through August, is rat season outdoors. Norway rats are busy around trash, gardens and compost, and soil softened by spring rain makes burrowing easy. Fix food sources then, and book exclusion before the next fall. Fall is the turning point.
Is sealing worth it on a Scranton home?
Ask any provider to itemize the openings and materials so you can see exactly what you are paying for, and compare two quotes line by line. Usually yes, because sealing is the one step that keeps working after the provider leaves. With a median home value around $140,000 in Scranton, it can be tempting to skip rodent work, but the alternative is often trapping every fall and repairing what mice chew in between. The damage adds up quietly. Mice gnaw wiring inside walls, nest in insulation, and soil stored clothes and paperwork. Rats gnaw openings out to quarter size in doors and siding, which turns a mouse-only house into one rats can enter too. None of that shows up until it is a repair bill. To keep sealing affordable, do the easy parts yourself: door sweeps, copper mesh around pipes under sinks, and hardware cloth over foundation vents. Then hire for the parts that need a ladder or experience, such as rooflines and hidden basement gaps.
What affects the price
- Whether you have mice, rats or both, since rats need bigger traps and outdoor work.
- The number and location of gaps, especially high or hard-to-reach openings.
- Basements with many cracks and pipe penetrations to close.
- The number of follow-up visits included in the price.
- Cleanup of droppings and replacement of soiled insulation.
- Whether a shed, detached garage or porch also needs work.
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What's your biggest concern about rodents?
When to call for help
Call someone when you see rat droppings or burrows, when you find quarter-sized holes, or when mice are still turning up after you have sealed the obvious gaps and trapped for a couple of weeks. A provider is also worth it when droppings are spread through an attic or shed, since cleanup is where exposure happens. Ask for a written plan that follows integrated pest management, with exclusion first. Across Scranton, late August or early September is a good time to book sealing, ahead of the fall push.
What you can do yourself
Gaps at the roofline or behind finished walls are hard to find without experience. If you would rather not handle bait, a licensed provider can place locked stations where kids and pets cannot reach them, and only after exclusion and trapping have been tried. Plenty of Scranton mouse problems can be handled at home. Buy copper mesh, a tube of silicone sealant and a few door sweeps, then work around pipes, vents and doors closing anything a dime would slide into. Set mouse snap traps along walls near the freshest droppings and check them daily. Store food in hard containers. That is the same IPM order Penn State Extension teaches: prevent, exclude, use nonchemical tools first. The balance shifts with rats and with hidden openings. Rats need bigger traps, careful placement and work across the yard, and an active burrow system usually means more than one animal.
Rodents in Scranton
Winter lows around 19F make heated homes the obvious refuge every fall, while summers near 82F and about 40 inches of yearly rain keep Norway rats active and burrowing outside from spring on. Average humidity near 70% keeps basements and crawl spaces on the damp side, and damp, cluttered storage is good cover. The median home value is about $140,000, so for many Scranton owners careful sealing is a modest cost next to rewiring a wall or replacing soiled insulation. Pennsylvania's own extension guidance, from Penn State, leans on exclusion and trapping before chemicals. Scranton was founded in 1866 and is known for its coal heritage and, these days, The Office. About 76,000 people live in this urban city at roughly 745 feet of elevation in the Northeast's humid continental zone. For rodents, a few numbers matter most.
Local research
Rodents in Scranton, PA: what the public record shows
Before you compare quotes, it helps to know which rodents actually live in Pennsylvania, when they are busiest around Scranton, and what the state figures look like. Everything below links to the agency or university page it came from.
Opening a mouse can pass through
Penn State Extension's exclusion threshold for Pennsylvania homes.
Penn State ExtensionTelling mice from rats by droppings
Identification decides trap size and placement.
Penn State ExtensionRodent species recorded in Pennsylvania
- 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.
- Deer mouse (Peromyscus maniculatus) — Primary U.S. hantavirus carrier; lives throughout Washington and the interior West.
When rodents are busiest around Scranton
Fall entry; winter infestations. Upper Midwest and Northeast: mice in walls and garages all winter.
Based on Scranton’s humid continental climate profile.
Penn State Extension frames mouse control as IPM: prevention, exclusion and nonchemical tools first, least-risk products only if needed.
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: Penn State Extension; CDC; Pest Notes: House Mouse; Pest Notes: Rats; Hantavirus. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep rodents away
- Check every pipe, cable and vent entry and fill gaps with copper mesh plus silicone sealant.
- Install door sweeps on exterior doors and the door between garage and house.
- Screen foundation vents and window wells with hardware cloth.
- Keep garbage in metal or heavy plastic cans with tight lids.
- Move bird feeders away from the house and clean up spilled seed.
- Store dry goods and pet food in glass, metal or hard plastic.
- Keep firewood and stored lumber off the ground and away from walls.
- Do a quick gap check in late August before nights turn cold.
A good rodent quote lists the inspection, the number of trapping visits, each opening to be sealed and the material for it, and any cleanup.Did you know?
Puerto Rico reported 46 leptospirosis cases in the first 13 weeks of 2026, down from 82 at the same point in 2025.
Roof rats, a warm-climate species, have 3 to 5 litters a year with up to 8 young each.
Plague still reaches about 7 people a year in the U.S. on average, carried by fleas on rodents in the Southwest and far West.
Questions people ask
How small a hole can a mouse use in a Scranton house?
In a Scranton home, check where pipes and cables enter, around basement windows and under doors. Anything a dime slides into is worth closing before October. About the size of a dime, according to Penn State Extension, and rats need roughly a quarter. The CDC puts the mouse threshold at 1/4 inch.
How do I tell mouse droppings from rat droppings?
Penn State Extension describes mouse droppings as pointed and about the size of a grain of rice, while rat droppings are blunt and about the size of a small raisin. This matters because rats need larger traps placed differently, and because rat activity usually means outdoor burrows to deal with too. Look at shape and size.
What should I use to seal mouse holes?
Copper mesh packs well into small gaps around pipes, hardware cloth covers vents and larger openings, and sealant locks the patch in place. Avoid relying on foam or caulk alone, since rodents chew through soft fillers. Copper mesh, hardware cloth and silicone sealant are Penn State Extension's picks, along with sweeps on every exterior door.
When do mice start coming into Scranton homes?
As temperatures drop toward Scranton's average winter low near 19F, house mice look for warmth and food, and they stay in walls, ceilings and garages all winter once inside. Sealing gaps in late summer is the cheapest way to cut the number that get in. Mostly in fall, from about September into November.
Should I start with rat poison?
Poison can kill pets or wildlife that find bait, and a poisoned mouse or rat may die inside a wall. Seal and trap first, and leave any baiting to a licensed provider using locked stations. No. Penn State Extension frames rodent control as integrated pest management: prevention, exclusion and nonchemical tools first, with least-risk products only if needed.
How fast do Norway rats multiply in Scranton?
The University of California reports that a female Norway rat has 4 to 6 litters a year and weans 20 or more young. Across Scranton, rats breed mostly outdoors through spring and summer, burrowing in soil kept workable by about 40 inches of yearly rain, then follow pipes and gaps into basements. Quickly.
Do deer mice in Pennsylvania carry hantavirus?
cases since 1993 occurred west of the Mississippi. Still, deer mice like sheds and garages, so clean their droppings with the CDC's wet method rather than sweeping. Deer mice are the main hantavirus carrier, and they are on Pennsylvania's species list, but the disease is rare in the East. The CDC reports 94% of U.S.
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Sources (6)
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 October 11, 2026 · How we write these guides