Savannah, GA Rodent Control: Protecting Historic Buildings, Rentals and Attics

What to look for

Winter lows average about 40F, mild enough that breeding continues through the cold months, with a surge indoors in fall. At just 49 feet of elevation, heavy rain can saturate the ground and push Norway rats out of burrows toward buildings. UGA Extension confirms that all three structural rodents, the roof rat, the Norway rat and the house mouse, are established in Georgia, and Savannah sees each of them. Roof rats are the climbers that end up in attics. They climb trees, vines and utility lines, then slip in through gaps at rooflines, dormers and chimney flashing. Norway rats stay low, burrowing under foundations, stoops and debris in damp soil, and UGA notes they can live their whole lives within a range 100 to 150 feet across. House mice settle in kitchens and wall voids. The climate gives none of them a break. Summer highs average 92F, humidity runs around 73 percent and the city gets 49 inches of rain a year, which keeps vegetation dense and food plentiful.

• 1Running or scratching overhead after dark, often along the eaves or near a chimney.
• 2Droppings on attic floors, on top of cabinets or along high shelves.
• 3Gnawed openings about the size of a dime or larger at trim, soffits or door corners.
• 4Burrows near stoops, foundations or garden beds after heavy rain.
• 5Chewed fruit, nuts or seeds stashed in hidden corners.
• 6Dark rub marks along beams, pipes or the tops of walls.
• 7Rice-sized droppings in kitchen drawers or behind the refrigerator from house mice.

Treatment options and typical costs

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Roof rats and the trees around Savannah homes.

In Savannah's mild climate, roof rats stay active all year, so check the attic for fresh droppings in spring and again in late summer. Catching a new arrival early is far easier than clearing an established colony. Savannah is known for its squares, and wherever trees grow close to a building, in a square or a backyard, roof rats have a way up. Roof rats are skilled climbers. They run along branches, vines and utility lines, jump to gutters and rooflines, and slip into attics through any gap they find. On older buildings, those gaps are often at dormers, chimney flashing, soffit corners and roof vents. Once inside, roof rats nest in insulation and travel the same routes every night, which is why the scratching sounds so regular. Breaking the route matters as much as sealing. Trim limbs so they do not touch or overhang the roof. Pull vines off walls and gutters. Then seal openings with hardware cloth that has quarter-inch squares, as UGA Extension recommends.

Sealing an older Savannah building without damaging it.

A city founded in 1733 has buildings that have been settling, patched and rewired for generations. Those buildings are worth protecting, and they are also full of gaps: around chimney flashing, at dormers, where trim has pulled away, at old utility penetrations and along foundations. UGA Extension notes that rodents can enter through openings as small as a dime, so even small gaps matter. The recommended material is hardware cloth with quarter-inch squares. Sheet metal works well for gnawed edges, mortar for gaps in masonry, and steel wool with sealant for small holes around pipes. On a historic Savannah building, the method matters as much as the material. Ask how the provider plans to fit repairs so they close gaps without obvious changes to visible surfaces. Ask whether any repair will require removing or cutting original materials, and what the alternatives are. Request a written list of every opening found and how it was sealed. That record helps if activity returns and gives future owners or contractors a clear history of the work.

Students, renters and turnover near SCAD.

In multi-unit buildings, rodents move through shared walls and ceilings, so treating one unit at a time often fails. Ask the provider to inspect neighboring units and common areas, and keep a written record of what was sealed in each one. SCAD is one of the things Savannah is known for, and student renters face the same extra rodent pressure as any rental housing. Units turn over often, food and trash get left behind at move-out, and entry points can go unnoticed between tenants. For renters, the best steps are simple. Report activity to your landlord in writing, with photos of droppings, chewed packaging or damage. Store food in sealed containers, take trash out often and do not leave pet food out. Snap traps along walls near droppings can help with a few mice, but sealing the building usually needs the landlord's involvement, so check your lease and ask. For landlords, the smart approach is to seal entry points between tenants rather than trap the same unit every year.

Why a Norway rat's territory reaches past your lot.

UGA Extension says a Norway rat may spend its whole life within a range 100 to 150 feet across. In Savannah, that circle can easily take in neighboring yards, alleys and green space. That explains why rats keep returning even after you trap a few. The burrow may be under a neighbor's shed, beneath a stoop down the block or in a damp corner of a garden. Trapping only inside your house will miss the source. Savannah's low elevation and wet climate add to the pressure. At 49 feet above sea level, with 49 inches of rain a year, soil stays damp and heavy rain can flood burrows, sending rats looking for higher, drier spots, sometimes inside a crawlspace or garage. Control has to cover the burrow area. Look for burrows across the property, seal ground-level entry points and place traps along outdoor runways near the foundation. If burrows are next door, a conversation with neighbors helps, since a coordinated effort clears a block far faster than one house at a time.

Savannah's rodent year, season by season.

Savannah's mild winters mean rodents never fully slow down, but pressure still shifts through the year. In winter, with lows around 40F, rats and mice already inside keep breeding in warm attics and wall voids. Mice can produce a new litter every 30 days, according to UGA Extension, so an unchecked winter population grows quickly. Spring brings new growth and food outdoors. Roof rats spend more time in trees, and Norway rats expand burrows. Summer, with highs near 92F and frequent heavy rain, keeps outdoor breeding going, and storms can flood burrows near low-lying buildings. Fall is the surge. From September through November, cooler nights send more rodents looking for sheltered nesting spots, and attics and crawlspaces fill up. This is when many Savannah households first hear scratching overhead. Late summer is the best window for prevention. Trim trees back from rooflines, seal gaps with quarter-inch hardware cloth and check the attic before the fall push. A second check in late winter catches anything that slipped through.

Simple ways to keep rodents away

• Trim tree limbs and vines so they do not touch roofs, gutters or walls.
• Seal gaps with hardware cloth that has quarter-inch squares, per UGA guidance.
• Fit door sweeps on exterior doors and check gaps around utility lines.
• Store food, pet food and bird seed in sealed metal or heavy plastic containers.
• Keep trash and recycling bins closed and away from the building.
• Clear debris, overgrowth and stored clutter from along the foundation.
• Check attics and crawlspaces twice a year for droppings and nests.
• Report rodent activity to your landlord in writing as soon as you see it.

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