The short version
Trap the ones inside, then seal the gaps. Around Gretna, check the roofline too, since roof rats come in high. An inspection usually costs $75–$250.
- Look for droppings, gnaw marks and night-time scratching.
- Winters around Gretna are mild, so rodents stay active all year.
- Traps remove them; sealing keeps them out.
- Never sweep or vacuum droppings dry.
Homeowners, renters and landlords in Gretna who are hearing, seeing or smelling signs of rodents.
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.
- 1Burrow holes along the foundation, deck, or shed.
- 2Pets staring at or pawing at a wall or appliance.
- 3Chewed holes in the bottom of cabinets or drawers.
- 4Rodent hair or droppings inside HVAC ducts.
- 5Disturbed insulation or tunnels in the attic.
- 6Pipe gaps stuffed with debris or looking chewed wider.
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 Gretna 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
Tamper-Resistant Exterior Bait Stations
$100–$300 setup, $40–$80 per service visit
Stations should be numbered and logged to show activity trends. A good pro shows you which stations get hit. Placement changes over time.
- Time
- 30–45 minutes per visit, ongoing
- Best for
- Outdoor rat pressure; ongoing perimeter protection
Snap-Trap Program
$150–$400 per visit
Snap traps remain the workhorse for rodents inside Gretna homes because a caught rodent is proof, not a guess. A Gretna pro sets many traps along walls and runways, then returns to check, reset, and remove.
- Time
- 30–60 minutes per visit, 2–4 visits
- Best for
- Active indoor infestations; fast results you can see
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 Gretna 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.
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.Which rodents live around Gretna.
They burrow along foundations and enter low. Roof rats are common around Gretna too. They climb, and come in high through attic vents and branches. House mice are the most common rodent in Gretna homes. They're small, curious and breed quickly. Norway rats are the other usual suspect.
When they move in.
Listen for them in the attic after dark. Spring is breeding season. Small problems grow fast. Activity still rises in fall and winter, even here. Roof rats are active all year.
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.
Daylight under a door means a gap. Homes from Gretna out to New Orleans and Kenner share the same weak spots, so the checklist below works across the area. For roof rats, check soffit vents, gable vents and eaves. Trim branches back from the roof. Many homes in Gretna sit on slabs. Garage seals, brick weep holes and pipe gaps are typical entries. Check the bottom corners of the garage door. Look behind the washer and under sinks.
A year of rodents in Gretna.
- Spring: breeding season. Act on any sign quickly. - Summer: with highs around 91°F in Gretna, rodents look for water. Fix drips and leaks. - Fall: activity rises as rodents settle in for winter. Check the attic and garage. - Winter: with lows near 46°F in Gretna, check the attic, garage and pantry for droppings.
Mice or rats?
- Sounds: mice sound light and quick. Rats sound heavier. - Behavior: mice are curious about new traps. Rats avoid them for days. - Rub marks: rats leave greasy smudges along walls and beams. - Droppings: mouse droppings are rice-sized. Rat droppings are two or three times bigger. - Holes: mice chew dime-sized holes. Rats chew holes closer to quarter-sized.
Sealing small gaps yourself.
- Hardware cloth: use quarter-inch mesh over vents and larger holes. - Door sweeps: close the gap under garage and exterior doors. - Expanding foam: fine on top of mesh, useless on its own. - Check your work: daylight through a gap means it isn’t sealed. - Steel wool or copper mesh: pack it into small gaps first. - Sealant or mortar: cover the mesh so it stays put.
Cleaning up droppings safely.
- Spray droppings with a bleach solution, then wait five minutes. - Wipe up with paper towels and bag them. - Don’t sweep or vacuum droppings dry. It stirs up dust. - Wash your gloved hands, then your hands. - Air the room out for 30 minutes first. - Wear rubber or plastic gloves.
What happens at an inspection.
Most inspections take about an hour. The inspector walks the outside first. They check the foundation, vents, rooflines and utility gaps. Inside, they check the kitchen, garage and attic. You should come away with a list of entry points. Photos help.
Rodents in the car.
Mice and rats nest in engine bays and chew wiring. Park in a closed garage when you can. Check the air filter box for nesting. Clear birdseed and pet food from the garage.
Bird feeders and rodents.
Spilled seed feeds mice and rats. Use a seed tray and sweep up spills. If rodents show up, bring feeders in at night. Store seed in a metal can with a tight lid.
Questions to ask before you sign.
- How many trap visits are included? - What happens if they come back? - Is cleanup included, or extra? - Will you use poison inside? (Ask them not to.) - Where are they getting in? - Which gaps will you seal, and with what?
Rodents by the numbers.
For Gretna homes, those three findings — species, entry points, and scale — are what a quote should be built on, not a regional average. For Gretna homes, ask any provider to show you the entry points and the plan before you compare numbers. National surveys set rough expectations but cannot diagnose one house. For Gretna homes, what actually matters is a walk-through: where the droppings are, how the rodents are getting in, and how large the colony is.
What affects the price
- Age of the home and condition of the foundation.
- Home size, stories, and roofline complexity.
- Number of trapping visits needed to reach zero.
- Emergency or short-notice scheduling.
- Sewer line inspection if rats are entering underground.
- Mice versus rats; rats take longer and cost more.
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What's your biggest concern about rodents?
When to call for help
Call right away if you see rats. They take a longer, more careful approach. Attic cleanup is hard to do safely without training. Call if you hear them in the attic or walls. Droppings in several rooms are another sign. So is a dead-rodent smell.
What you can do yourself
Start tonight with snap traps along the walls. Bait them with peanut butter. Store food in sealed bins. Seal small gaps with steel wool and sealant. Rooflines, vents and attics are harder. That's where a pro's sealing work pays off.
Rodents in Gretna
In Gretna's neighborhoods, woodpiles, fences, bird feeders and gardens draw rodents close to the house. A typical home in Gretna is worth around $190k, and chewed wiring or soiled insulation can get expensive. Gretna gets about 64 inches of rain a year, and heavy storms flood burrows, which pushes rats toward buildings. Winter lows average around 46°F in Gretna, so there's little pressure to move indoors, and activity stays steady.
Local research
Rodents in Gretna, LA: what the public record shows
Before you compare quotes, it helps to know which rodents actually live in Louisiana, when they are busiest around Gretna, and what the state figures look like. Everything below links to the agency or university page it came from.
Rat-proofing gap size
LSU AgCenter: rat-proof all buildings by sealing all holes and openings larger than 0.5 inch.
LSU AgCenterBait or trap spacing for mice
Mice hide anywhere and do not move far from nests; glue boards and traps work where baits are not acceptable.
LSU AgCenterMinimum bait per placement
All rodenticides should go in tamperproof bait stations per the LSU guide.
LSU AgCenterRodent species recorded in Louisiana
- 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 Gretna
Year-round, fall surge. Roof rats dominate Florida, Texas and Gulf Coast attics.
Based on Gretna’s humid subtropical climate profile.
LSU AgCenter's guide treats Norway rats, roof rats and house mice together; mice nest in appliances and chew wiring and can carry the same diseases as rats.
Rules that apply in Louisiana
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: LSU AgCenter; 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.
- Cap chimneys and repair damaged roof vents.
- Seal every gap larger than a quarter inch with metal mesh.
- Check crawlspace doors and vents for chewed openings each fall.
- Inspect vehicle engine bays if parked near fields or woods.
- Declutter garages and attics to remove nesting cover.
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?
For Gretna homes, 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
How do I know if I have mice or rats?
Mouse droppings are about the size of a rice grain. Rats also chew larger holes and sound heavier at night. Check the droppings.
Are rats a bigger problem than mice?
Rats are bigger, chew more, and avoid new traps for days. Around Gretna, roof rats often nest in attics, so check the roofline too. Usually.
Do ultrasonic repellers work?
It doesn't pass through walls either. Sealing and trapping work better. Not reliably. Rodents get used to the sound within days.
What does a rodent inspection involve?
Inside, they look at the kitchen, attic, garage and under sinks. You should get a list of entry points. The inspector checks the outside walls, roofline, vents and utility gaps.
What is rodent-proofing and why does it cost so much?
A mouse fits through a dime-sized gap, so it's slow work. It's also the part that keeps them out. It means sealing every gap with metal mesh and sealant.
How many homes have a full rodent infestation?
Fourteen percent of U.S. homeowners told a September 2022 Harris Poll for the National Pest Management Association (NPMA) that they had dealt with an infestation of multiple rodents at some point.
Where in the house are mice most often found?
homeowners, 37% reported a sighting in the kitchen. Before work starts in Gretna, ask how many visits are included and what happens if the rodents come back. The kitchen leads. Among homeowners who had ever encountered rodents in the National Pest Management Association's (NPMA) September 2022 Harris Poll of more than 1,300 U.S.
Are rodents a problem in Gretna?
They're common here, as almost everywhere. Roof rats are also common in the area.
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