The short version
Rodent control in Atlanta works when you seal the building first and trap second. A quarter inch gap is all a house mouse needs, and mild Atlanta winters averaging 34F lows keep roof rats and Norway rats breeding outdoors through every month of the year. Ask any provider for a written list of the openings they will close, not a standing bait box.
- Sealing openings ends an infestation; bait alone only lowers the count.
- Roof rats work the attic, Norway rats the crawlspace and foundation line.
- Winter lows near 34F never force a die-off, so pressure is year-round.
- Fifty inches of rain a year can rot the wood that becomes an entry point.
- Wet droppings down with bleach solution before cleanup and never sweep.
If you have been catching mice for weeks and the catches never taper off, you do not have a trapping problem. You have an opening that nobody has closed yet. This is for Atlanta homeowners hearing movement overhead, renters trying to get a landlord to fix a hole rather than set a trap, and small business owners with a kitchen backing onto an alley.
What to look for
Average humidity around 71 percent plus 50 inches of rain a year means outdoor water is never the limiting factor, so populations build on food and shelter alone. Cold does not reset anything either, which is why activity here runs all twelve months with a noticeable surge in fall. UGA Extension confirms that all three commensal rodents, the house mouse, the Norway rat and the roof rat, live in Georgia, and they use different floors of the same building. Roof rats climb, so the attic is their floor. They travel along limbs, gutters and utility lines, drop onto a roof, and get in at a gable vent, a ridge gap or a soffit corner where the wood has gone soft. Norway rats stay low, often spending their lives in a circle 100 to 150 feet across by UGA's estimate, burrowing along foundations, under decks and in the ground near sewer connections, then coming up through a crawlspace. House mice work anywhere they can, and they need almost nothing to do it. The CDC uses a pencil as the reference for the smallest opening a mouse can pass, about a quarter of an inch, and rats simply gnaw a hole that size until it fits them. Atlanta's climate is what keeps all three going.
- 1Scampering or rolling sounds overhead after dark, which points to roof rats rather than mice.
- 2Dark grease smears along a joist, pipe or the top of a crawlspace wall where the same route is used nightly.
- 3Droppings shaped like rice grains in the pantry, or larger capsule shaped pellets near a foundation burrow.
- 4Chewed corners on cardboard, insulation pulled into a ball, or gnaw marks on soft rain damaged trim.
- 5A sharp ammonia smell in a closed attic on a humid afternoon.
- 6Fruit, pet food or birdseed disappearing overnight from a garage or carport shelf.
Why it’s worth acting soon
- UGA Extension says mice bear litters at 30-day intervals from two months old, so a pair in September can be a colony by the holidays.
- Gnawed wiring in an attic is a fire risk and rarely shows up until something stops working.
- The CDC links rodents directly to leptospirosis, rat-bite fever, salmonellosis, tularemia, hantavirus and LCM.
- Nesting flattens attic insulation, which drives up cooling bills through a long Georgia summer.
- Urine soaked insulation and subfloor in a humid house turns into a much larger repair bill.
1/4 inch, about the width of a pencilSmallest gap a house mouse can pass throughCDC 4 to 6, weaning 20 or more offspring annuallyNorway rat litters per yearUC IPM Treatment options and typical costs
Full exclusion with metal and hardware cloth
Quoted after inspection
A crew maps every opening a quarter inch and wider, then closes it with hardware cloth, sheet metal, mortar or flashing. On an Atlanta house, ask that the list cover soffit returns, gable vents, crawlspace vents and the gaps where plumbing and cooling lines enter. It is the only step that permanently ends entry, and it should be listed opening by opening on the quote.
- Time
- Set after the inspection, depending on how much of the roofline is involved
- Best for
- Any active infestation, and any home that has had rodents more than once
Snap trapping inside the structure
Quoted after inspection
Traps placed against walls, on joists and along grease trails remove the animals already inside once the openings are shut. Trapping is checkable in a way bait is not, since you can count what you caught and see when the catches stop. UGA Extension suggests about a dozen traps per house for rats, set perpendicular to walls, and several return visits before anyone calls the job finished.
- Time
- Several weeks of checks
- Best for
- Active indoor activity, and anyone who does not want a carcass in a wall
Exterior bait stations, used narrowly
Quoted after inspection
Locked tamper resistant stations along a fence line or burrow area can knock down heavy outdoor pressure while repairs happen. Rodenticide carries real secondary poisoning risk for dogs, cats, hawks and owls that catch a poisoned animal, so ask which product is going in, whether it is an anticoagulant, and when the stations come off the property.
- Time
- Ongoing until the exterior population drops
- Best for
- Yards with active burrows next to an alley, dumpster or greenbelt
Sanitation and habitat cleanup
Quoted after inspection
Cutting limbs back from the roof, moving woodpiles off the foundation, containing pet food and getting trash into hard lidded cans removes the reasons animals stay. In a wet Georgia climate this also means fixing any gutter that keeps dumping water onto a corner of the fascia and softening the wood there.
- Time
- A weekend of your own work, or one crew visit
- Best for
- Preventing the next infestation after the current one is cleared
Prices are typical published ranges. Ask what’s included before you compare quotes.
Cardboard boxes make easy nests and the gap under an overhead door makes an easy entrance. Plastic bins and a fresh door seal fix both.Which rodent is in your Atlanta attic?
Sound under the floor, in a crawlspace, or near a foundation wall points to Norway rats. They are heavier, they burrow, and they favor the ground level of a property near garbage, sewer lines and dense shrubbery. You will sometimes find a burrow opening at the base of a wall or under a deck. House mice give themselves away with droppings rather than noise. They are small enough to be quiet, they stay within a short range of a nest and a few feet of a wall, and they leave rice grain pellets along baseboards, in drawers and inside pantry boxes. Identifying which of the three you have decides where traps go and which openings matter most, so it is worth a few minutes with a light before anyone starts working. Start with where the noise is. Sound in the ceiling, along the top plate of a wall, or in the attic itself points to roof rats, the climbing species among the three that UGA Extension confirms in Georgia. They are lean climbers with long tails, they nest high, and they move along the same route every night, which is why a flashlight held at a low angle across a joist will often show a polished grease trail.
A month by month rodent calendar for Atlanta.
Animals already inside a warm attic are breeding right through it, so a January noise complaint usually means a nest established in the fall. March through May is when people find the evidence. Spring cleaning opens sheds, garages and storage rooms that have been shut since October, and droppings that accumulated all winter come to light. This is the time to wet down and disinfect rather than sweep. June through August pushes activity toward whatever is cool and damp. With highs near 89F and humidity around 71 percent, shaded crawlspaces and poorly vented attics become preferred harborage, and outdoor water is easy to find anywhere on a property. September through November is the surge. Nights cool, natural food outdoors thins out, and animals start testing the building envelope in earnest. This is the single best window for exclusion work in Atlanta, because sealing before the surge keeps you out of the whole cycle rather than reacting to it in December. January and February bring the quietest exterior population of the year, but with average lows only around 34F, quiet is not the same as gone.
A good inspection starts outside at ground level: door thresholds, the joint between siding and foundation, and anywhere a pipe or cable enters.What a first inspection should cover on a crawlspace home.
If the visit ends with a bait box by the back door and no list of openings, that is a service subscription, not a plan to end the problem. A real first visit is not rushed, and it covers three zones. Outside, the inspector should walk the full perimeter looking at crawlspace vents, the sill plate line, dryer and utility penetrations, downspout splash zones and any burrow openings near the foundation, then look up at the roofline for gaps at soffit returns, gable vents and ridge caps. Inside the crawlspace, they are checking for droppings on the vapor barrier, disturbed insulation between joists, grease marks on piers, and rain damaged sill wood soft enough to gnaw. Across Atlanta, with 50 inches of rain a year, moisture damage and rodent entry tend to show up in the same corners. In the attic, they are looking for trails through the insulation, nesting material, and daylight at the eave line. What you should get at the end is a list of specific openings with a proposed repair for each, an explanation of where traps will go, and a schedule of return checks.
Renters, landlords, and who fixes the hole.
When only one half happens, the animals keep coming. If you rent, put the report in writing, date it, and include photographs of droppings, gnaw damage and any hole you can see from the ground. Ask specifically for exclusion repairs rather than traps, since a landlord who authorizes only bait is paying for a service that will still be running next year. If you own the property, understand that the cheapest path is usually the repair. Contaminated insulation, chewed wiring and urine damaged subfloor in a humid climate can cost far more than closing the openings would have, and a documented exclusion job protects you if a tenant raises a habitability complaint. Ask the provider for photographs of every sealed opening so you have a record of what was actually done. Rodent problems in rentals stall because the fix and the responsibility sit in different hands. Sealing a soffit gap, replacing rotted fascia or screening a crawlspace vent is structural repair, and that is the property owner's side of the line. Keeping food sealed, trash contained and clutter down is the tenant's side.
How to compare two rodent quotes without guessing.
A plan that finishes when trap catches hit zero for a set number of checks is measurable. A plan that finishes when the month ends is not. Third, what is the rodenticide policy. Ask whether any bait will be used, which active ingredient, whether stations are locked, and how the risk to dogs, cats and neighborhood raptors is handled. A provider who cannot answer that clearly is worth passing on. Fourth, what is excluded. Attic insulation removal, sanitizing, carpentry and tree trimming are often separate line items, and one quote may look cheaper only because it left them out. Get the price after inspection in writing, and ask what triggers a change order, so the number you agree to is the number you pay. Lay the two proposals next to each other and check them on four points. First, does the quote list openings individually with a material named for each, or does it just say exclusion. Hardware cloth, sheet metal and mortar hold up. Foam, caulk and steel wool alone do not survive a determined rat. Second, how many follow up visits are included and what ends the job.
What affects the price
- How much accessible roofline, soffit and fascia has to be sealed, which is the biggest single driver.
- Whether the house sits on a crawlspace, since working on your back under a floor is slower than working in a yard.
- Rain damaged wood that has to be replaced before anything metal can be fastened to it.
- Attic insulation removal and replacement after heavy contamination, often priced separately by area.
- How many return trap checks are included before the job is considered closed.
- Tree limbs and vines touching the structure, which sometimes need a separate crew.
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What's your biggest concern about rodents?
When to call for help
Call someone when you hear activity overhead, when droppings show up in more than one room, or when you have caught mice on three separate nights without the numbers dropping. Attics and crawlspaces are the two places where amateur work often fails in Atlanta, because the openings are at height, behind insulation, or reachable only by crawling. Also call if a rodent has been into stored food, if there is a suspected dead animal inside a wall, or if you are a landlord with a tenant reporting bites or contaminated food. A provider who inspects the roofline and the foundation before quoting is doing the job correctly.
What you can do yourself
Plenty of this you can do yourself. Snap traps set perpendicular to a wall with the trigger toward the baseboard work as well in your hands as in anyone else's, since UGA Extension notes mice travel only 5 to 10 feet out from a wall, and peanut butter is fine bait. You can pull food into sealed containers, secure trash, cut back the limbs that touch your roof, and put hardware cloth over a garage vent you can reach from a step ladder. Where it goes wrong is the part you cannot see. Finding every quarter inch opening on a two story Atlanta house means walking the roofline and getting into a crawlspace with a light, and a missed soffit corner keeps the whole cycle running. Rodenticide is the other line. It is easy to buy and easy to misuse, it kills animals inside walls where you cannot reach them, and it moves up the food chain into pets and raptors. If bait is going to be part of the plan, have someone licensed place it in locked stations outdoors.
Rodents in Atlanta
Fifty inches of rain a year at about 1,050 feet keeps gutters, fascia and crawlspaces wet, and wet wood is easier to gnaw. Founded in 1837 and now a city of about 511,000, Atlanta has a median home value near $400,000, so chewed attic wiring and soaked insulation are expensive repairs on a valuable house. UGA Extension's Circular 970, revised in November 2025, is Georgia's current homeowner guide, and its advice is to identify the species, exclude with 1/4-inch hardware cloth, then trap. Atlanta gives rodents an unusually easy year. Summer highs near 89F with 71 percent humidity push them toward cool, shaded voids like attics with poor ventilation and crawlspaces that stay damp. Then winter arrives with average lows of 34F, cold enough to send animals toward a heated building but never cold enough to thin the outdoor population, so nothing resets between seasons.
Local research
Rodents in Atlanta, GA: what the public record shows
Before you compare quotes, it helps to know which rodents actually live in Georgia, when they are busiest around Atlanta, and what the state figures look like. Everything below links to the agency or university page it came from.
Commensal rodent species established in Georgia
UGA Extension states all three live in Georgia, so identification drives where you place traps.
University of Georgia ExtensionNorway rat home range
A Norway rat may spend its whole life in that circle, so control has to cover the burrow area, not just the house.
University of Georgia ExtensionRodent species recorded in Georgia
- 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.
- Roof rat (Rattus rattus) — Climber of attics and trees in warm and coastal regions; tail longer than head plus body.
When rodents are busiest around Atlanta
Year-round, fall surge. Roof rats dominate Florida, Texas and Gulf Coast attics.
Based on Atlanta’s humid subtropical climate profile.
UGA Circular 970 (revised November 2025) recommends about a dozen traps per house for rats, set perpendicular to walls.
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: University of Georgia Extension; 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
- Trim branches and vines back several feet from the roof so roof rats lose their bridge.
- Screen gable and crawlspace vents with quarter inch hardware cloth rather than window screen.
- Fix the gutter or downspout that keeps soaking one section of fascia, since 50 inches of rain finds every weak board.
- Install door sweeps on the garage and any exterior door where daylight shows at the threshold.
- Store birdseed, pet food and fallen fruit in metal or hard plastic with a locking lid.
- Keep firewood, pallets and yard debris off the ground and away from the foundation wall.
- Walk the exterior twice a year, in early spring and again in September before the fall surge.
In a multi-unit building, mice move between apartments through shared walls and pipe chases, so treating one unit rarely solves it. Ask for a building-wide plan.Did you know?
Roof rats produce three to five litters a year of up to eight young each, which is how an attic population builds so quickly.
Rats gnaw a quarter inch hole wider until it fits them, so a gap that looks mouse sized today can become a rat entrance.
Of the 890 hantavirus cases reported in the United States since 1993, 94 percent occurred west of the Mississippi, which is why deer mouse exposure is a far smaller concern in Georgia.
Questions people ask
Why do I hear rodents in the attic but never see one downstairs?
Mice would leave droppings in the kitchen. Overhead running at dusk and again before dawn is the roof rat signature. Because you most likely have roof rats, and they live above you rather than with you. They climb limbs, downspouts and cable lines onto an Atlanta roof and nest in insulation, coming down only to reach food.
Does Atlanta get a rodent off season?
Cities with hard freezes get a partial reset. Atlanta does not, so exclusion repairs pay back more here than seasonal baiting ever will. Not really. With winter lows averaging 34F, the outdoor population survives the cold months and keeps testing your building, which is why activity here runs all year with a fall surge as nights cool.
How small a hole actually has to be closed?
That standard makes the work tedious rather than difficult, since a house has many qualifying gaps once you count vents, pipe penetrations and door thresholds. Use 1/4-inch hardware cloth or sheet metal, never expanding foam alone. A quarter of an inch, which the CDC describes as roughly the width of a pencil, and UGA Extension puts it as an opening about the size of a dime.
How do I clean up droppings without making it worse?
Open the space and stay out of it for thirty minutes, then wear gloves and spray with a bleach solution of about one and a half cups per gallon, let it soak five minutes, and wipe up with paper towels. The CDC specifically warns against sweeping or vacuuming, since both put dried particles into the air you are breathing. Wet everything down first.
Should I be worried about disease from rats in Georgia?
residents in 2026 through early April. Leptospirosis is a wet urban rat exposure, which matters in a city getting 50 inches of rain, so keep dogs away from standing water near burrows. Take it seriously without panicking. The CDC lists leptospirosis, rat-bite fever, salmonellosis, tularemia, hantavirus and LCM as spread directly by rodents, and it counted 21 leptospirosis cases among U.S.
How fast does a small problem become a big one?
UC IPM reports that a Norway rat produces four to six litters a year and weans twenty or more offspring, and roof rats run three to five litters of up to eight. That is why two animals in October turn into a real colony by February, and why waiting to see if it sorts itself out never works. Faster than most people expect.
Is rodenticide the fastest way to deal with this?
Several states have tightened rules on second generation anticoagulants for that reason. Ask about the sealing plan first. It is the fastest way to get a second problem. Poisoned animals die in wall voids and above ceilings where nobody can retrieve them, the entry hole stays open, and pets, hawks and owls that catch a dying rodent are exposed too.
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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