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.
- In Annapolis, mice usually start moving indoors in October and November, as nights get colder.
- Traps remove them; sealing keeps them out.
- Never sweep or vacuum droppings dry.
Anyone in Annapolis dealing with mice or rats, or hoping to keep them out.
What to look for
Rodents are mostly unseen. You hear them at night and find droppings by morning. A mouse fits through a gap the size of a dime. Seeing one in daylight usually means there are more.
- 1Gnaw marks on food packaging, wood trim, or wiring.
- 2Disturbed insulation or tunnels in the attic.
- 3Droppings in drawers, pantries, under sinks, or along walls.
- 4Pets staring at or pawing at a wall or appliance.
- 5Chewed holes in the bottom of cabinets or drawers.
- 6Fresh gnaw marks on door corners or garage weatherstripping.
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
First, the pro maps where rodents get in. That map guides the traps and sealing.
- Time
- 60–90 minutes
- Best for
- Every job; nothing else works without it
Tamper-Resistant Exterior Bait Stations
$100–$300 setup, $40–$80 per service visit
Not every Annapolis home needs stations; a mouse problem inside rarely does. They fit best where rats burrow outside or neighbors have activity.
- Time
- 30–45 minutes per visit, ongoing
- Best for
- Outdoor rat pressure; ongoing perimeter protection
Follow-Up Monitoring
$50–$150 per visit, or included in a plan
Ask what happens if activity returns during the monitoring period. Many re-trap and re-seal under the same agreement. Confirm first.
- Time
- 20–40 minutes per visit
- Best for
- Confirming the house stays clear after treatment
Attic and Crawlspace Cleanup and Sanitation
$500–$3,000, higher if insulation is replaced
Scent trails attract new rodents. Cleanup helps the sealing hold. Deodorizing and sealing an Annapolis attic makes it less inviting to the mice outside looking for a way in.
- Time
- Half day to two days
- Best for
- Heavy contamination; odor, urine-soaked insulation, nesting
Prices are typical published ranges. Ask what’s included before you compare quotes.
Rats can travel plumbing, so a sink or floor drain with a missing strainer is worth fixing; a tight strainer or grate keeps them out.Which rodents live around Annapolis.
House mice are the most common rodent in Annapolis homes. They're small, curious and breed quickly. Norway rats are the other usual suspect. They burrow along foundations and enter low.
When they move in.
Small problems grow fast. Spring is breeding season. Check for gaps before then.
Dense shrubs against the house and a dripping hose bib give rodents cover and water. Trimming back and fixing drips makes the yard less inviting.How they get into houses here.
Plenty of homes in Annapolis have basements. Rodents use gaps around utility lines, dryer vents and window wells. Check where pipes and cables enter. Look at the dryer vent flap. Window wells need covers or screens. Homes from Annapolis out to Glen Burnie and Bowie share the same weak spots, so the checklist below works across the area.
A year of rodents in Annapolis.
- Summer: with highs around 87°F in Annapolis, rodents look for water. Fix drips and leaks. - Spring: breeding season. Act on any sign quickly. - Winter: with lows near 28°F in Annapolis, check the attic, garage and pantry for droppings. - Fall: rodents look for shelter. Seal gaps before cold nights arrive.
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.
National surveys set rough expectations but cannot diagnose one house. In Annapolis, what actually matters is a walk-through: where the droppings are, how the rodents are getting in, and how large the colony is. In Annapolis, those three findings — species, entry points, and scale — are what a quote should be built on, not a regional average. In Annapolis, ask any provider to show you the entry points and the plan before you compare numbers.
What affects the price
- Attic access and how much insulation is contaminated.
- Home size, stories, and roofline complexity.
- Local labor rates and licensing costs.
- Materials used for sealing: mesh, sheet metal, mortar.
- Whether sheds, garages or other outbuildings are included.
- Follow-up visits included versus billed separately.
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What's your biggest concern about rodents?
When to call for help
Attic cleanup is hard to do safely without training. They take a longer, more careful approach. Call right away if you see rats. So is a dead-rodent smell. Droppings in several rooms are another sign. Call if you hear them in the attic or walls.
What you can do yourself
That's where a pro's sealing work pays off. Rooflines, vents and attics are harder. Seal small gaps with steel wool and sealant. Store food in sealed bins. Bait them with peanut butter. Start tonight with snap traps along the walls.
Rodents in Annapolis
In Annapolis, comparing written quotes side by side is the easiest way to see what is actually included, because the scope, prep steps, and follow-up terms vary a lot between providers. In Annapolis, the humid subtropical climate means rodents activity tends to follow fall and winter (rodents move indoors for warmth), so scheduling the visit before the busy stretch usually means a faster response and a cleaner quote. A typical home in Annapolis is worth around $525k, and chewed wiring or soiled insulation can get expensive. In denser parts of Annapolis, rats travel along alleys, fences and utility lines, so neighbors often share the problem. Winter lows average around 28°F in Annapolis, and that cold is what sends mice looking for a way in. Annapolis gets about 46 inches of rain a year, and heavy storms flood burrows, which pushes rats toward buildings.
Local research
Rodents in Annapolis, MD: what the public record shows
Before you compare quotes, it helps to know which rodents actually live in Maryland, when they are busiest around Annapolis, and what the state figures look like. Everything below links to the agency or university page it came from.
Leptospirosis cases (YTD 2026 vs 2025, week 13)
CDC NNDSSRodent species recorded in Maryland
- 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 Annapolis
Fall entry (Sept-Nov). Norway rats and house mice move indoors as temperatures drop.
Based on Annapolis’s humid subtropical climate profile.
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: CDC NNDSS; 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
- Keep garbage in lidded cans and pick up fallen fruit.
- Clean up pet waste and do not leave bowls out overnight.
- Walk the exterior each season looking for fresh gnawing.
- Fill gaps around pipes, cables, and AC lines with copper mesh.
- Trim tree branches at least six feet from the roof.
- 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?
In Annapolis, rodents make up about 40 percent of all mammal species on Earth.
In Annapolis, the word rodent comes from the Latin rodere, which means to gnaw.
Questions people ask
What is rodent-proofing and why does it cost so much?
It's also the part that keeps them out. A mouse fits through a dime-sized gap, so it's slow work. It means sealing every gap with metal mesh and sealant.
What should be in a rodent control quote?
Cleanup should be listed separately. It should say what happens if they return. Entry points, sealing materials and the number of trap visits.
Why do rodents keep coming back every year?
New ones follow the same path in. Traps remove the rodents inside. Usually because the entry points were never sealed.
How long does rodent control take?
Most jobs take two to four weeks. That covers inspection, sealing and a few trap checks.
Are snap traps better than poison?
Bait belongs in locked stations outside. Poisoned rodents can die inside walls and smell for weeks. Traps let you confirm the catch and remove it. Indoors, usually yes.
How many homes have a full rodent infestation?
14% of U.S. homeowners reported ever having multiple rodents in the 2022 NPMA/Harris Poll, which still argues for acting early, before one visitor becomes several.
Does a house with structural problems attract more rodents?
Expect a good pro in Annapolis to connect their plan to what they actually found at your home. Census Bureau's 2019 American Housing Survey (AHS). Homes with sloping, leaning or buckling outside walls were 5.6 times as likely to report rodent sightings in the U.S. The two go together, at least in the data.
Are rodents a problem in Annapolis?
They're common here, as almost everywhere. House mice cause most problems.
Nearby cities
Related guides
Sources (10)
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