The short version
In Louisiana, the spiders that matter are the brown recluse and southern black widow. Both are native to the state and can live indoors year-round. Control focuses on identifying these two, sealing gaps, reducing clutter, and calling a professional for targeted treatment when a recluse or widow is found.
- Most spiders in Louisiana are harmless, but black widows and brown recluses pose medical risks.
- Late summer through fall is peak spider season; males roam indoors seeking mates and warmth.
- Professional treatments cost $150-$500 and include interior and exterior applications.
- Prevention focuses on sealing cracks, reducing clutter, and eliminating insect prey.
- Research: Between $100 and $300 is Local quotes vary; ask for a written estimate.
For Louisiana homeowners, renters, landlords, and families with children or pets who want practical, scientifically accurate information about spider control. Whether you've spotted a few webs or are dealing with a recurring infestation, you'll find actionable advice on prevention, DIY options, and when to call a pro.
What to look for
With 61 inches of rain a year, homes also attract the insects spiders eat, which keeps spider populations well fed. The state's older housing stock, with gaps and cracks, gives them easy entry. Widows build messy webs in corners, under eaves, and in sheds. Recluses prefer undisturbed places like attics, crawlspaces, and storage boxes. Brown recluses and southern black widows are native here, so encounters are not rare. Louisiana's warm, humid climate supports spiders all year.
- 1Frequent sightings of spiders, especially multiple individuals of the same species.
- 2Webs in corners, window frames, basements, attics, or outdoor eaves.
- 3Small, dark fecal spots or shed exoskeletons near webs or hiding spots.
- 4Egg sacs – round, silken pouches often tucked in crevices or under furniture.
- 5Prey remains, such as piles of insect wings or legs, indicating spider activity.
- 6Unexplained bites or skin reactions, though bites are often misattributed.
Why it’s worth acting soon
- Bites from black widows or brown recluses can cause severe pain, necrosis, or systemic symptoms.
- Spiders can multiply quickly; a single egg sac may contain hundreds of spiderlings.
- Fear and anxiety may reduce your family's comfort and use of living spaces.
- Infestations may spread to adjacent rooms or units in multi-family dwellings.
- Property damage is rare, but heavy webbing can be unsightly and difficult to clean.
in the U.S. are the black widow and brown recluseMedically significant spidersUS CDC Treatment options and typical costs
Identification and inspection
Usually included in the service quote
A professional first confirms which spider you have, because many look-alikes are harmless. This step prevents unnecessary treatment and focuses control where it's needed.
- Time
- 30 to 60 minutes
- Best for
- Anyone who has seen a spider and is unsure what it is.
Web removal and vacuuming
Included in most treatment plans
Removing webs, egg sacs, and live spiders with a vacuum is a key step. It immediately reduces the spider population and removes future generations.
- Time
- Ongoing, as needed
- Best for
- Homes with visible webs and spider activity.
Crack and crevice treatment
$150 to $350 per visit
Professionals apply residual insecticides into cracks, crevices, and voids where spiders hide. This targeted approach is more effective than broadcast spraying.
- Time
- Lasts several weeks to months
- Best for
- Known spider hiding spots and entry points.
Dust treatments in voids
$200 to $400 per visit
For attics, wall voids, and crawlspaces, professionals may use dust formulations that reach spiders in hidden areas and last longer than sprays.
- Time
- Lasts months
- Best for
- Homes with recluse populations in attics or crawlspaces.
Preventive maintenance
Varies by pro
Sealing gaps, repairing screens, and reducing outdoor lighting help keep spiders out. Many companies offer ongoing service to maintain barriers.
- Time
- Quarterly or annual visits
- Best for
- Homes in high spider areas or with past infestations.
Prices are typical published ranges. Ask what’s included before you compare quotes.
Where brown recluses live, they like quiet spots under beds and furniture, so a flashlight check along the frame is worth a minute.The spiders you'll actually meet in Louisiana.
Other common house spiders, like cellar spiders and wolf spiders, are harmless. The southern black widow, shiny black with a red hourglass, builds webs in dark corners, garages, and sheds. The brown recluse, with its six eyes and violin marking, prefers undisturbed indoor spaces. Louisiana has many spider species, but only two require your attention. If you're unsure, contact an expert or use a reputable identification service. If you see a brown spider, don't assume it's a recluse; many look-alikes exist. Learning to tell the difference prevents unnecessary fear. They may look scary but they help control pests.
spiders activity by season.
In Louisiana, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure usually turns up the conditions that are letting them in. The most useful first step in Louisiana is to note where you have seen spiders and when they appear, because that timeline is what lets a provider focus on the right area instead of treating the whole property. Scheduling before the busy stretch, rather than after it, tends to mean faster service and a more accurate quote, and a local provider can point out the conditions that matter most in Louisiana.
The gap under a door is one of the easiest ways in, for spiders and for the insects they follow.A year-round timeline for Louisiana spider activity.
Louisiana's mild climate means spiders are active most of the year. Regular cleaning and sealing are your best defenses throughout the year. Even in January, a warm house can harbor active spiders. Indoor populations can grow steadily year-round, so prevention is a constant effort. You may notice an uptick in late summer and early fall as males search for females. In winter, temperatures rarely drop below 43°F, so spiders can remain active, especially indoors. From spring through fall, you'll see more outdoor activity, including wandering males seeking mates.
What happens during a professional spider inspection.
They'll also check entry points like door gaps and utility penetrations. They may use a flashlight to look for webs, egg sacs, and live spiders. They'll inspect likely hiding spots: attics, crawlspaces, basements, garages, and storage rooms. A professional starts by asking about what you've seen and where. The goal is to treat the hiding spots, not just the surfaces you see. For widows, they'll remove webs and apply targeted sprays. For recluses, this might involve dusting wall voids and placing sticky traps. Based on their findings, they'll recommend a treatment plan.
What affects the price of spider control in Louisiana homes.
The cost of spider control in Louisiana varies with several factors. Always get a detailed quote before agreeing. the local market in your city, whether New Orleans or Shreveport, influences pricing. Older homes, common in Louisiana, may have more cracks and voids, increasing the time needed. The type of spider matters too; brown recluse and black widow treatments require more precision and follow-up. Homes with large attics or crawlspaces may cost more to treat because those areas need attention. Square footage sets the baseline, and how far the spiders have spread through the structure moves it from there.
Renters, landlords, and who pays for spider control.
In Louisiana, if spider problems stem from structural issues like cracks or poor sealing, landlords are typically responsible for pest control. For renters, it's wise to check your lease for pest control clauses. If the landlord refuses, local housing codes may require them to maintain habitability. If you're a tenant, take a few photos and ask your landlord for professional treatment. For brown recluses or widows, which are health concerns, landlords should act promptly. If the infestation is due to tenant clutter or cleanliness, the tenant may be responsible. Tenants should report problems.
Prevention tips for Louisiana's older homes.
Start by sealing cracks in foundations and around pipes. Many Louisiana homes were built before 1980, meaning they have gaps, original wood, and unfinished basements that spiders love. These steps reduce hiding spots and entry points, making your home less inviting to spiders. Trim tree branches that touch the roof. Keep firewood outside and away from the house. In attics, store items in sealed plastic bins instead of cardboard boxes. Reduce moisture, as humidity attracts insects and spiders. Ensure vents are screened. Install weatherstripping on doors and windows.
When a spider bite is an emergency.
Most spider bites cause minor redness and swelling, but bites from brown recluses and black widows can be serious. Remember that many bites blamed on spiders are actually from other insects or infections, so professional diagnosis is important. Prompt medical attention reduces complications. Emergency treatment may include antivenom for widow bites. If possible, capture the spider for identification, but don't risk another bite. Small children, older adults, and anyone managing a chronic illness tend to react harder and should be seen sooner. Seek immediate medical care if you experience severe pain, muscle cramps, fever, chills, or a spreading wound.
What affects the price
- Size of the home and property (larger homes require more product and time).
- Severity of the infestation (light vs. heavy).
- Type of treatment (spray, dust, or integrated pest management).
- Number of interior and exterior treatments needed.
- Accessibility of infested areas (crawl spaces, attics, etc.).
- Local market rates and company reputation.
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Which spider concerns you most in your home?
When to call for help
If someone is bitten and develops severe symptoms, seek medical help immediately, then have the spider identified if possible. A professional can identify the species, locate hiding spots, and apply targeted treatments. Also call if you see multiple spiders over a short period, or if you find webs and egg sacs in several rooms. Call a professional if you find a brown recluse or black widow inside your home, especially if you have children or pets.
What you can do yourself
Their hiding spots are often in wall voids and attics, requiring professional-grade products and knowledge. Misidentification can also lead to unnecessary worry. If you suspect a recluse or widow, a professional inspection is worth the cost. They know where to look and how to treat safely. DIY spider control works for harmless species. You can vacuum webs, seal cracks, and reduce clutter yourself. Sticky traps help monitor activity. However, brown recluse and black widow infestations are harder to eliminate.
Where you live matters
Coastal areas like Lake Charles and Houma see a mix of species, including black widows in woodpiles and sheds. Year-round mild temperatures mean spiders never truly go dormant, so prevention is a continuous effort. Local pest control companies understand these regional nuances and tailor their treatments accordingly. For example, treatments in New Orleans might focus more on sealing gaps in historic homes, while those in Shreveport might emphasize attic inspections and dust applications for recluses. Louisiana's spider control needs vary by region. In New Orleans and Baton Rouge, high humidity and older homes with many crevices create ideal conditions for web-building spiders like the common house spider and cellar spider. Frequent rains can also drive spiders indoors. In Shreveport and the northern part of the state, brown recluse sightings are more common, especially in attics and storage areas.
Simple ways to keep spiders away
- Seal cracks and gaps around windows, doors, and utility lines.
- Install screens on vents and repair torn window screens.
- Keep storage boxes off the floor and away from walls.
- Reduce clutter in attics, basements, and garages.
- Shake out clothing and shoes before wearing, especially if stored.
- Trim vegetation away from the house and keep the yard clean.
- Turn off outdoor lights or use yellow bulbs to reduce insect prey.
- Vacuum regularly, especially in corners and under furniture.
Spiders found in a bathtub or vanity usually wandered in from a gap behind the plumbing, not up the drain.Did you know?
Weight for weight, spider silk is stronger than steel.
Spiders can't chew. They liquefy a meal first and drink it.
The brown recluse has only six eyes, arranged in three pairs, unlike most spiders which have eight.
Questions people ask
What is the best way to get rid of spiders in my home?
The best approach is integrated pest management (IPM): seal entry points, reduce clutter, vacuum webs and egg sacs, control other insects, and apply targeted treatments. For persistent or dangerous species, professional pest control is recommended.
Are all spiders dangerous?
Only two groups in the US are medically significant: black widows and brown recluses. Most household spiders are harmless and actually help control pests like flies and mosquitoes. No.
How can I tell if a spider is a brown recluse?
They have six eyes arranged in three pairs, and are about the size of a quarter. They are typically found in dry, undisturbed areas. Brown recluses are tan to dark brown with a violin-shaped marking on the back.
Do spider sprays work?
Over-the-counter sprays can kill spiders on contact, but they may not address the root cause. Professional sprays have residual effects and are applied to hiding spots and entry points for longer-lasting control.
How much does professional spider control cost?
In Louisiana, prices typically range from $150 to $500 for an interior and exterior treatment, depending on the size of the home and severity of the infestation.
Will spiders come back after treatment?
Regular maintenance, sealing gaps, and follow-up treatments are often needed to keep them away. Many professional services include retreatments if needed. Treatment reduces spider populations, but new spiders can enter from outside.
Is it safe to have pets and children in the home during treatment?
They will advise you to keep pets and children away from treated areas until the spray dries, usually a few hours. Always follow the technician's instructions. Professional pest control companies use products that are safe when applied correctly.
How much is quarterly pest control for spiders?
In Louisiana, most spiders are harmless and beneficial, so the goal is usually to remove the webs and egg sacs and reduce the insects they feed on. In Louisiana, only the black widow and brown recluse are medically significant in the U.S., and they are identified by their markings.
Sources (18)
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 Spider Exterminator · Updated September 11, 2026 · How we write these guides