How Much Does It Cost to Exterminate Spiders in 2025?

This article was updated using automation technology and thoroughly reviewed for accuracy by HomeAdvisor Editor Ryan Noonan.

Exterminating spiders in your home costs an average of $300, with most homeowners spending between $100 and $500. However, small treatments might be as low as $50, while major infestations in large homes can exceed $1,200. While spiders often help control other pests, a significant infestation—especially of venomous species—may require professional extermination. Understanding the costs involved can help you make informed decisions to keep your home safe and comfortable.

Spider Extermination Cost Factors

Several factors will inform your total spider extermination costs. Here's a closer look at how your costs break down.

Area Size

The size of the area needing treatment significantly affects spider extermination costs. If the infestation is confined to a specific area, such as a basement, you'll calculate costs based on that space rather than your home's total square footage. On average, spider extermination costs about $0.15 to $0.20 per square foot. If you’re treating an entire 2,000-square-foot home, the average cost will be $300 to $400, but if you’re only treating a small area, your total will be much lower. 

Infestation Level

Exterminating a small nest of spiders will cost much less to exterminate than a whole-home infestation. Here are the average costs of exterminating various spider infestation levels.

Cost by Treatment Frequency

The yearly cost of spider extermination treatments varies based on how frequently you request them and whether you choose preventative or reactive treatments. Regular preventative treatments keep spider infestations at bay, while reactive treatments address existing infestations. Here is a breakdown of the cost by treatment frequency:

Preventative Treatment

Preventative treatments can help keep spider infestations at bay and provide peace of mind. Regular monthly or quarterly preventative treatments cost between $750 and $1,000 per year, depending on your home's size and the frequency of visits. While this may seem more expensive upfront, it can be cost-effective if you live in an area prone to spider infestations.

Reactive Treatment

Reactive treatments address existing infestations. A one-time reactive visit typically costs $100 to $300, depending on the severity of the infestation and the size of your home. However, if you wait until an infestation becomes severe, the cost to exterminate it could exceed that of regular preventative treatments.

Many homeowners choose preventative treatments for peace of mind, knowing their home is spider-free.

DIY vs. Hiring a Spider Exterminator

While you can save money by removing spiders yourself—traps and sprays cost as little as $25 to $50—these methods may only be effective for minor infestations. Spider traps, like glue boards, are affordable but might not suffice for larger infestations. Spider sprays kill on contact but may leave toxic residues and might not reach hidden spiders.

If you occasionally spot a spider, using traps and sprays might be sufficient. However, if sprays and traps aren't controlling your spider population, or if you're dealing with venomous species like brown recluses or black widows, it's time to hire a professional. A local spider exterminator can effectively eliminate the infestation and provide peace of mind. Many professionals offer organic pest control methods to keep your home safe from toxic chemicals.

How HomeAdvisor Gets Its Cost Data

No place is more important than your home, which is why HomeAdvisor connects homeowners with local pros to transform their houses into homes they love. To help homeowners prepare for their next project, HomeAdvisor provides readers with accurate cost data and follows strict editorial guidelines. After a project is complete, we survey real customers about the costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.