The average roach exterminator cost is between $100 and $600, depending on the species, infestation severity, and home size. Read on for a cost breakdown.
How Much Does a Rat Exterminator Cost in St. Louis? [2025 Data]
Normal Range: $117 - $231
Homeowners in St Louis, MO, can expect to pay $174 for a visit from a rat exterminator. Depending on the infestation size and location in the home, you may spend between $117 and $231.
How we get this data
FollowTheFlow / Adobe Stock Photography
FollowTheFlow / Adobe Stock Photography
Highlights
Rat exterminator costs in St Louis, MO, are around 55% lower than the national averages.
You’re more likely to have a rat problem if you live in an old St. Louis home, in a neighborhood with poor trash practices, or near new construction.
The cost of rat removal depends on your home’s size, the nest location, and its accessibility.
Rat extermination in St. Louis, MO, costs $174 on average, with your final bill ranging from $117 to $231. Costs depend on your home's square footage, the extent of the infestation, and how easy it is for the exterminators to access the nest.
St. Louis' mix of historic homes, abandoned buildings, and warmer-than-average winters provides the ideal environment for rats to thrive. The issue is exacerbated in areas with deteriorating infrastructure and improper waste management. That's why setting aside funds for professional pest control is a smart choice if you want to be proactive about preventing these uninvited guests—even if average costs are considerably lower than the national averages.
Rat Exterminator Cost Factors
In St. Louis, MO, your home's size and the extent of the infestation are the primary factors driving extermination costs, but other aspects can also impact the price. For example, if you live in a historic home in Lafayette Square with gaps in the foundation or a row house in Soulard with hard-to-reach ducts in the basement, the tricky access could increase your bill.
Local rat exterminators offer several levels of service. Your price will increase if you select options to rodent-proof your home (sensible if you live in a rat-prone district in Downtown St. Louis) that prevent rats from coming back or address any damage to your home.
Infestation Location
The rats’ location affects extermination costs, and an inaccessible infestation means higher labor costs. Exclusion can quickly become expensive if rats are inside the walls or have caused internal damage to insulation or ductwork.
| Infestation Location | Cost Considerations |
|---|---|
| Shed or garage | Rats living in a shed or garage are the least expensive to remove because they’re easy to find, trap, and release. |
| Attic and basement | If rats cause damage to your attic or basement, you’ll need to budget for the cost of repairs, such as replacing flooring or drywall. |
| Walls | Wall infestations can require extra labor and additional fees for using thermal imaging equipment. |
| Ductwork | Ductwork exterminations require extra work and specialized tools, adding to the cost, especially if parts of the ductwork need to be removed. |
| Crawl spaces | Crawl spaces may lead to slightly higher costs since they require more labor to access than basements. |
Infestation Size
The larger the rat problem, the longer inspections, exclusions, and extermination steps will take, which adds to the cost. A large infestation requires more traps, bait stations, and more serious eradication methods, such as fumigation. Since rats are prolific disease spreaders and can produce up to 6 litters each year, catching an infestation early is important.
| Infestation Size | Average Cost Range in St. Louis |
|---|---|
| Small | $45–$225 |
| Moderate | $110–$675 |
| Large | $450–$3,600 |
Home Size
The more space a professional has to inspect for signs of rats, the more it will cost. The average home size in St. Louis, MO, is 1,500 square feet. If you choose exclusion services to seal and block rodent-friendly entrances, bigger homes may require more work. This is also why infestations limited to sheds, barns, or other separate buildings will be significantly less expensive. Costs vary depending on the extermination method, but average between $0.10 and $1.35 per square foot.
| Home Size | Average Cost for Whole-House Options in St. Louis |
|---|---|
| 1,000 square feet | $100–$1,350 |
| 2,000 square feet | $200–$2,700 |
| 3,000 square feet | $300–$4,050 |
| 4,000 square feet | $400–$5,400 |
Cost of Rat Extermination Methods
Once you’ve confirmed signs of a rodent infestation, rat exterminators can approach your rodent infestation in several ways. Let’s look at common rat extermination methods and how much exterminators charge for those services.
Live Rat Removal Cost
| Pros of Live Removal | Cons of Live Removal |
|---|---|
| Minimal, quick labor | Charges per rat can be high |
| Suitable for small infestations | Requires hands-on removal |
If you want to get rid of rats without poison, most exterminators charge around $25 to transport each live rat caught from your property. Exterminators charge for removal because they incur fuel and labor costs while traveling at least a mile from your home to send the rat to its new happily ever after.
Rat Exclusion
| Pros of Rat Exclusion | Cons of Rat Exclusion |
|---|---|
| Effective for in-home infestations | Significantly more expensive |
| Prevents rats from returning | Takes longer |
| Can apply to other pests | Not foolproof |
Many exterminators will seal off all entry points where rats can enter your home. The most common exclusion strategy is sealing holes. However, exclusion can also include screening crawl spaces and roof vents, repairing holes, and pruning back trees that rats use as stairs into your home. The cost of exclusion ranges from $90 to $270.
Fumigation Costs
| Pros of Fumigation | Cons of Fumigation |
|---|---|
| Tackles large-scale infestations throughout a building | Very expensive |
| Eradicates rats that can’t be found otherwise | Use of toxic fumes in the home |
| Fast-acting | Must vacate the house |
If your rat exterminator suggests fumigation, a last resort method for a severe and dangerous rat infestation, expect to pay $0.45 to $1.35 per square foot. This works out as $675 to $2,025 for the average St. Louis home. Similar to termite fumigation, everyone will likely need to leave the house for one to two days while the chemical does its job.
Follow-Up Visits
Most rat exterminators will arrange follow-up visits to check for signs that more rats are on your property, such as new nests. If they laid bait or traps, pros examine the results and determine whether additional steps are needed. You can expect to pay around $25 to $65 for follow-up visits, which a pro may bundle in your estimate.
Extermination Pro Costs
St. Louis' cost of living is lower than the national average, and competition amongst pest control professionals is high, meaning you will likely pay less for a local rat exterminator than you would in a higher-wage area.
Most pros charge a flat fee per visit, so it’s easier to budget than dealing with hourly rates. You might pay around $99 to remove a rat from your attic, while a full-house exclusion service could cost you closer to $350. If you live near abandoned buildings or overrun neighborhoods, consider setting up quarterly or annual service plans—many pros offer discounts for regular visits, which is a smart move in rat-heavy areas.
Does Rat Extermination Increase Home Value?
It’s true that rat extermination in St. Louis won’t offer the same high home improvement return on investment (ROI) as installing new windows or repainting some tired rooms. However, it’s still money well spent when you consider the long-term benefits. A home filled with rat damage and droppings isn’t appealing to potential buyers. Knowing you’ve rat-proofed your property provides peace of mind, especially in St. Louis, where older buildings with easy access points for rodents are common.
By taking care of the rat problem rapidly, you also reduce the chance of costly home repairs. Rats are master chewers that can rapidly gnaw through electric cables, drywall, insulation, timber foundations, and even pipes. By being proactive, you can protect your home’s value, reduce red flags in home inspections, and keep your sale moving smoothly.
How Angi Gets Its Cost Data
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project 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.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
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