Professional spider identification and control for Illinois homeowners. We eliminate existing infestations and reduce the conditions that attract spiders to your home.
Sanctuary Pest Control provides professional spider control services throughout the Plainfield, Joliet, Naperville, and greater Will County area. Most spiders in Illinois are harmless — but brown recluse spiders are a genuine medical concern, and heavy spider activity inside your home signals an underlying pest problem that needs attention. We identify the species you’re dealing with, eliminate active infestations, reduce prey insect populations that attract spiders, and seal entry points as part of our quarterly pest control program to keep them from coming back.
Brown recluse spiders pose a real health risk. Illinois is within the native range of the brown recluse, and these spiders are regularly found in homes throughout Will and DuPage counties. A brown recluse bite can cause tissue necrosis — a spreading wound that destroys skin and underlying tissue, sometimes requiring medical intervention. They hide in undisturbed areas like closets, boxes, behind furniture, and inside shoes, making accidental contact common.
Heavy spider activity indicates a larger pest problem. Spiders are predators — they go where the food is. If you’re seeing a lot of spiders in your home, it means you also have a significant population of insects they’re feeding on: flies, ants, moths, silverfish, and other prey bugs. Treating the spider problem without addressing the underlying insect population produces only temporary results.
Spider webs accumulate quickly and create unsightly conditions. Cobweb spiders, cellar spiders, and other web-building species produce visible webs in corners, around windows, in garages, and along eaves. In homes with heavy spider pressure, webs reappear within days of cleaning. Professional treatment reduces spider populations so webs stop accumulating.
Spiders enter through gaps you may not notice. Spiders exploit the same entry points as other pests — cracks in foundations, gaps around windows and doors, utility penetrations, and openings where siding meets the foundation. Sealing these entry points is an essential part of long-term spider control and benefits your overall pest prevention.
Brown recluse spiders are the most medically significant spider in Illinois. They’re light brown with a distinctive dark violin-shaped marking on their back, about the size of a quarter including their legs. Brown recluses prefer dark, undisturbed spaces — cardboard boxes in storage areas, closets, behind wall-mounted pictures, inside rarely worn shoes, and in basement corners. They’re not aggressive but will bite when accidentally pressed against skin.
Wolf spiders are large, fast-moving ground hunters commonly found in basements, garages, and ground-level living spaces. They don’t build webs — instead, they actively hunt prey on the ground, which often brings them into living areas through ground-level openings. Wolf spiders can reach over an inch in body length and their size alarms most homeowners, but their bite is not medically dangerous.
Cobweb spiders (common house spiders) build messy, tangled webs in corners, window frames, and ceiling junctions. They’re the primary source of the cobwebs you constantly clear from your home. While individually harmless, a large population creates persistent web buildup that makes your home look unkempt despite regular cleaning.
Cellar spiders (sometimes called daddy longlegs) build loose, irregular webs in basements, crawl spaces, and garages. They prefer damp, dark environments and can accumulate in large numbers in homes with moisture issues. Old webs pile up and create heavy cobweb accumulation in affected areas.
Step 1: Inspection and species identification. We conduct a thorough inspection of your home’s interior and exterior to identify what spider species are present and where they’re concentrated. This is especially important for brown recluse — if brown recluse spiders are found, we adjust our treatment approach to include targeted monitoring and more intensive interior treatments in harboring areas.
Step 2: Interior treatment of harboring areas. We apply targeted treatments to the areas where spiders hide and hunt — baseboards, closets, storage areas, basement perimeters, utility rooms, and behind appliances. For brown recluse infestations, we deploy sticky monitoring traps in key locations to assess population levels and track treatment progress over time.
Step 3: Exterior barrier and web removal. We treat the exterior perimeter of your home — foundation walls, around windows and doors, under eaves, along fence lines, and around exterior light fixtures that attract prey insects. We also knock down accessible spider webs and remove egg sacs — the egg sac removal directly reduces the population, and the web knockdown is strategic: when spiders rebuild their webs in the areas we just treated, they come into direct contact with the pesticide.
Step 4: Prey reduction and ongoing prevention. Because spiders follow their food supply, reducing prey insect populations is key to lasting spider control. Our quarterly pest control program includes perimeter treatments that suppress ants, flies, and other insects that attract spiders. Each visit also includes spider-specific monitoring so new activity is caught early.
Spiders are difficult to control with DIY methods alone. Over-the-counter sprays kill individual spiders on contact but don’t address the population hiding in wall voids, attic spaces, and undisturbed storage areas. Professional treatment combines residual products, entry point management, and prey reduction to produce lasting results — not just a temporary fix.
Sanctuary Pest Control provides professional spider control services throughout Will and DuPage counties. We serve homeowners in Plainfield, Joliet, Naperville, Bolingbrook, Romeoville, Lockport, and Shorewood. Whether you’re finding brown recluse spiders in your basement, wolf spiders in your garage, or cobwebs taking over every corner of your home, we have the experience and tools to solve the problem.
Spider problems don’t go away on their own — they get worse as prey populations grow. Contact Sanctuary Pest Control today for a professional spider inspection. Call us at 815-993-3472 or book an appointment online. We’ll identify what you’re dealing with and put a plan in place to keep spiders out of your living spaces.
