How Much Does Pest Control Cost in St. Louis? (2026 Numbers)

Revised August 13, 2026

Imagine it’s a warm Tuesday in April in Affton. You come down for coffee and there is a small drift of what look like insect wings on the sill above the kitchen sink, and a few more stuck in the window track. You sweep them up, think about it all morning, and call somebody. The company sends a technician out that Thursday, he pulls back the mulch along the south foundation wall, finds a mud tube the width of a pencil, and hands you a number just under two thousand dollars.

That same week a friend in Florissant has ants marching along the kitchen baseboard. Her quote is $180 for a one-time treatment, or $49 a month if she signs up for a plan — except the plan also carries a first-visit charge she does not notice until the invoice arrives. And across the metro in Webster Groves, a couple under contract on a 1912 brick two-story gets a wood-destroying insect report back with mud tubes noted on the foundation, and by closing there is a termite bond in the paperwork with an annual renewal nobody sat down and explained to them.

Three houses, three completely different bills, and not one of those companies did anything wrong. Pest control around St. Louis gets priced on at least five different meters — per visit, per month, per linear foot of foundation, per room and per square foot — and the number you are handed depends far more on which pest you have and which meter is running than on which company you called. Here is what each of those jobs actually costs in this metro, and what makes one quote double another on what looks like the same house.

The short answer

How much does pest control typically cost in St. Louis? For routine general pest work — ants, spiders, roaches, the ordinary stuff — local pricing runs roughly $85 to $189 per visit with an average near $133, which sits a little under the national one-time range of $100 to $300 and its roughly $171 average. A heavy or unusual infestation can push a single visit to $600.

Recurring service is a different animal. Monthly plans commonly run $40 to $70 a month, quarterly service lands around $100 to $175 per quarter nationally and $100 to $275 per visit in this market, and a full year of quarterly coverage typically totals $400 to $800.

Then there are the specialty jobs, which are the ones that actually wreck a budget. Termite treatment runs $500 to $1,500 for a liquid barrier on a typical house and $1,800 to $3,500 for a bait system on a 2,000-square-foot home. Bed bugs run $1,000 to $2,500 chemically or $2,000 to $4,000 for whole-home heat. A season of mosquito control is $300 to $700. Real rodent exclusion — not just trapping — is $600 to $1,400.

Those are wide bands on purpose. The rest of this is about which end of each one your house is on.

What a one-time treatment actually buys

A one-time visit is an inspection, a treatment of the interior and the exterior perimeter, and usually a short callback window — often thirty days — during which the company will come back once if the problem is still there. That is the whole product. It is the right purchase when you have a defined, contained problem: one ant trail, wasps under a soffit, a single mouse.

What it is not is a fix for anything that lives in the structure. Roach populations, established rodent colonies, carpenter ants nesting in a damp joist, and anything termite-related do not resolve in one visit, and a company that sells you a single spray for those is selling you a delay.

Typical one-time numbers by pest, nationally:

• General ants, spiders and seasonal invaders: about $100 to $300, with roughly $170 in the middle
• Carpenter ants: $150 to $500, averaging near $300, and past $800 when satellite colonies mean drilling into wall voids
• Cockroaches: $100 to $400 with an average around $160, rising to $300 to $700 per visit on a heavy infestation
• Mice: about $200 to $600 for inspection, trapping and basic rodent-proofing
• Rats: $150 to $600 using traps or bait, before any exclusion or cleanup work

One quiet detail worth knowing before you compare bids: some companies price a one-time visit high on purpose, because the visit is really a lead for the plan. If the one-time number and the plan’s first-year total are close, you are being steered, and that is fine as long as you can see it happening.

Plans, and the initial fee nobody quotes over the phone

Most recurring pest control in this metro is sold three ways. Monthly plans run about $40 to $70 a month. Bimonthly and quarterly plans are billed per visit, generally $100 to $275 locally, with the exterior treated every time and the interior only when you ask. Annual agreements bundle four visits and land at $400 to $800 for the year.

The line that surprises people is the initial or setup visit. That first treatment is longer, uses more product and often includes a full perimeter granule application and a web sweep, and it is priced separately — commonly $150 to $190 in the St. Louis market, and $150 to $300 more broadly. Some companies waive it if you sign an annual agreement. Some discount it if you commit to monthly. Nearly all of them leave it out of the number they say on the phone.

So when you compare two plans, do not compare the monthly figures. Compare twelve months plus the setup fee, minus any waiver, and compare what each visit includes. A $39 plan with a $299 start and exterior-only service costs more in year one than a $55 plan with no start fee and interior treatment on request.

Is $50 a month good for pest control? For an average St. Louis home on a real recurring program — exterior perimeter every visit, interior on request, unlimited callbacks between scheduled visits, and rodent stations included — yes, that is a fair market price and slightly better than the national midpoint. For a small condo or a townhouse it is a bit rich. And if $50 buys exterior spray only, with callbacks billed as extra visits, it is not a bargain at all, it is a subscription to a spray schedule.

The callback policy is where the actual value hides. A plan that includes unlimited return visits between scheduled services is worth noticeably more than one that does not, because that is the clause you use in July when the ants come back three weeks after a treatment.

Termites: the line item St. Louis cannot skip

This region is genuine termite country, and that is not marketing. According to University of Missouri Extension, Missouri has four native termite species, all subterranean, and the most common house-infesting termite in the country — the eastern subterranean termite, Reticulitermes flavipes — is the one at work here. Extension notes that swarming flights happen in Missouri during the spring months, usually on a warm sunny day following rain, which is exactly the pile of wings on the Affton windowsill.

It matters more here than in much of the country because of what we build on and what we build with. Subterranean termites invade from the soil around and beneath the structure, and MU Extension points out that consistently moist soil along a foundation wall makes good termite habitat. Heavy clay that holds water against a foundation, century-old brick homes with rubble or stone foundations, unvented crawl spaces, wood siding or porch posts sitting too close to grade, and mulch piled against the house are the local recipe. The same moisture problem that fills a basement is the one that feeds a termite colony, which is why our guide to basement waterproofing in St. Louis and this article keep pointing at the same downspouts.

Termite inspection and the WDI report

A standalone termite inspection runs $0 to about $277, with an average near $130. Many companies inspect free when they expect to bid the treatment, and that is legitimate as long as you understand the incentive.

The real estate version is a different document. A wood-destroying insect report for a home sale runs $200 to $500, though many purchase inspections land in the $0 to $150 range, and the NPMA-33 form that VA and FHA lenders require adds roughly $50 to $100. Worth knowing if you are buying with a VA loan: the borrower is not permitted to pay for that report — it has to come from the seller, the lender, the agent, the closing agent or another third party.

Termite treatment: liquid barrier versus bait

There are two mainstream approaches, and they are priced completely differently.

• Liquid soil barrier. Priced per linear foot of foundation perimeter at roughly $3 to $20 a foot, with $6 to $10 typical. Most homes total $500 to $1,500, and a 2,000-square-foot house with an active subterranean infestation generally runs $700 to $2,200. It works fast and leaves residual protection in the soil.
• Bait and monitoring systems. Stations are installed around the perimeter, usually fifteen to twenty-five of them. Installation runs $800 to $2,000 with $300 to $600 a year in monitoring and maintenance, and a 2,000-square-foot home commonly totals $1,800 to $3,500. Slower to work, less invasive, more expensive over time, and dependent on somebody actually showing up to service the stations.

The national average for termite treatment overall sits around $750 to $850, but averages are close to useless here, because a slab ranch in Maryland Heights and a Webster Groves foursquare with a stone foundation and a crawl space are not the same job.

One thing MU Extension is blunt about and worth repeating: there are no do-it-yourself termite control measures that effectively achieve the desired results. Whatever you spend, spend it on somebody licensed.

Termite bonds: what you are actually buying

A termite bond is a service contract, not insurance. Typically it covers an initial treatment, scheduled annual inspections, and free re-treatment if termites come back during the term. Expect $500 to $2,000 up front, with initial bonds commonly landing at $700 to $1,000 when they include that first full treatment, then $200 to $400 a year to renew — and sometimes as little as $100 to $350 depending on the tier.

The distinction that matters is retreat-only versus repair coverage. A retreat-only bond means they will treat again for free; you pay for the damage. A repair bond adds structural repair coverage up to a stated limit. The difference in annual cost between the two is usually $200 to $500, and given that termite damage repairs average $3,000 to $8,000 and can exceed $25,000 in severe structural cases, that is often the cheapest gap you will ever close on an older St. Louis house.

Read the conditions before you assume you are covered. Bonds generally require the annual inspection to actually happen, and they can be voided by things like inaccessible crawl spaces, added structures, or moisture conditions you were told to fix and did not.

Bed bugs: heat versus chemical, and why the cheap number is not the total

Bed bug work is priced per room or per square foot, and it is the single most expensive routine pest job most households will ever face.

• Chemical treatment: roughly $200 to $400 per room, or $1,000 to $2,500 for a typical whole home
• Heat treatment: roughly $400 to $900 per room, or $2,000 to $4,000 whole home, generally $2.00 to $6.50 per square foot, with a common $1,000 minimum

Chemical looks cheaper on the quote and frequently is not, because it takes two to three visits over four to six weeks, and you are living with bed bugs for that entire stretch. Heat is usually one day. Run the math on visits rather than on the per-visit price, and ask whether follow-up treatments are included in the quoted figure or billed separately — that single question changes the real total more than the choice of method does.

Mosquitoes: what a program costs, and what the public agencies already do

Mosquito pressure is real here, especially in the bottoms and on properties near the Missouri, the Mississippi and the Meramec, and anywhere with shade, standing water and dense plantings.

A single barrier spray runs $75 to $150 per visit for an average suburban lot, with some providers quoting $125 to $165. A full-season program — usually five to eight treatments every three to four weeks from late spring into early fall — runs $300 to $700, which brings the effective per-visit cost down to roughly $60 to $90. Across all property types and program lengths the average lands near $350, on a full range of $50 to $2,500.

Before you buy a program, know what already exists. St. Louis County runs a Vector-Borne Disease Prevention program that conducts nighttime ultra-low-volume truck-mounted adulticide applications in unincorporated St. Louis County and in contracted municipalities, targeting areas where arboviral disease is detected or where medically significant mosquito species are abundant. Residents can report an overabundance of mosquitoes or a suspected breeding site at 314-615-0680. The City of St. Louis runs its own Vector Control program covering mosquitoes and rats, reachable at 314-657-1500.

Public spraying is a population-level tool and it is not a substitute for treating your own yard, but it does mean the honest first move is a phone call about the standing water two doors down, before you sign a seven-treatment agreement.

Rodents: why exclusion costs more than trapping, and why it is worth it

Every fall, when nights drop into the forties, mice come inside. In this housing stock they have plenty of doors: gaps around utility penetrations, unsealed rim joists, garage door sweeps that no longer touch the slab, crumbling mortar joints on century brick, and the space behind a porch that nobody has looked at in thirty years.

Straight extermination — trapping and bait, with a couple of return visits — runs $200 to $600 for most homes. That solves the mice that are in the house today. It does not touch the reason they got in.

Exclusion is the other product. A full rodent-eviction plan with entry points sealed, one-way exclusion doors on active openings, repairs and a month or more of follow-up visits runs $600 to $1,400. Individual exclusion doors run $200 to $400 each. If droppings have accumulated in an attic or crawl space, cleanup and disinfection is separate again at $600 to $1,000, or $200 to $260 an hour.

Some of the sealing work is carpentry rather than pest control, and if your company does not do it, a qualified handyman runs roughly $67 to $190 an hour. Paying twice for trapping every autumn is the expensive way to own the problem.

What actually moves your number in this metro

• Square footage and stories. Almost every plan is tiered by home size, and a three-story with a walkout costs more to treat than a ranch of the same square footage.
• Foundation type. Stone, rubble and unvented crawl spaces are slower and riskier to treat than a poured slab, and they show up directly in a termite bid’s linear-foot count.
• Moisture. Clay soil, flat lots, short downspout extensions and a sump that runs constantly all raise both the risk and the price.
• Age and materials. Century brick with soft mortar joints, original wood windows and balloon framing give insects and rodents more paths than 1990s construction does.
• Which pest. The single largest factor. General pest, termites and bed bugs are three different businesses that happen to share a truck.
• Access. Finished basements, storage stacked against foundation walls, and crawl spaces you cannot get into add labor or get excluded from coverage entirely.

Licensing in Missouri, and why it belongs in a cost conversation

Applying pesticides for compensation on someone else’s property in Missouri is a licensed activity, and the license categories map neatly onto the price tiers above. The Missouri Department of Agriculture certifies commercial applicators in category 7A for general structural pest control, 7B for wood-destroying organisms including termites, carpenter ants and powderpost beetles, and 7C for fumigation. Applicators pass a core standards exam plus at least one category exam through Pearson VUE, licenses renew annually at $65, and recertification is required every three years. For 7A, 7B and 7C specifically, the state also wants documented supervised experience or an associate degree in biology, chemistry, agriculture or entomology. A solo operator with no employees needs both an applicator license and a pesticide business license.

The practical version: when you get a termite bid, ask whether the person doing the work holds a 7B, not just a 7A. Ask about the business license too. The state Pesticide Control Program can be reached at 573-751-5504. It is a two-minute question that separates a real termite company from a general pest company taking a swing at a termite job.

Seven questions that make three quotes comparable

• What is the initial or setup fee, and is it waived if I sign an annual agreement?
• Does each scheduled visit include the interior, or exterior only unless I request it?
• Are callbacks between scheduled visits included, or billed as additional visits?
• For termites, is this bid liquid barrier or bait, how many linear feet, and what is the annual cost after year one?
• Is the bond retreat-only, or does it include repair coverage, and what is the limit?
• What voids the guarantee — missed inspections, moisture conditions, inaccessible areas?
• Who is licensed for this specific work, in which category, and can I see it in writing?

Ask all seven of every company. The quotes stop being three numbers and start being three offers you can actually rank.

If you are still deciding who to call rather than what to spend, our companion piece on how to choose a pest control company in St. Louis covers red flags, guarantees and the questions to ask before anyone treats your home. And because the yard and the foundation feed most of these problems, what lawn care costs in St. Louis is worth reading alongside this one.

Frequently asked questions

How much does pest control typically cost in St. Louis?

For general pest work, expect roughly $85 to $189 per visit locally with an average near $133, against a national one-time range of $100 to $300 and about a $171 average. Recurring service runs $40 to $70 a month, $100 to $275 per quarterly visit in this market, or $400 to $800 for a year of quarterly coverage. Specialty work is priced separately: termites at $500 to $1,500 for a liquid barrier, bed bugs at $1,000 to $4,000 depending on method, mosquitoes at $300 to $700 for a season, and rodent exclusion at $600 to $1,400.

Is $50 a month good for pest control?

For an average St. Louis home, yes — provided that price includes the exterior perimeter every visit, interior treatment on request, rodent stations, and unlimited callbacks between scheduled visits. Monthly plans nationally run $40 to $70, so $50 sits right in the normal band. Check the setup fee before you judge it, though: a $50 plan with a $299 initial visit costs more in year one than a $60 plan with no start fee.

Why is my monthly pest control bill so high?

Usually one of four reasons. The initial or setup visit was billed on top of the first month, commonly $150 to $190 here. The plan is tiered by square footage and your home moved up a tier. Callbacks are billed as extra visits rather than included. Or add-on programs — mosquito service at $300 to $700 a season, a termite bond renewal at $200 to $400 a year, rodent stations — got bundled into one monthly draft. Ask for an itemized statement showing the base plan, the setup fee and each add-on separately.

Is it expensive to get rid of termites in your house?

It is the most expensive routine pest job most St. Louis homeowners face, and still far cheaper than the alternative. A liquid soil barrier runs $3 to $20 per linear foot of foundation, typically $6 to $10, putting most homes at $500 to $1,500 and a 2,000-square-foot house with an active infestation at $700 to $2,200. Bait systems run $800 to $2,000 to install plus $300 to $600 a year to maintain. For comparison, termite damage repairs average $3,000 to $8,000 and can exceed $25,000.

How many years does a termite treatment last?

A liquid termiticide barrier generally protects for about five years, and often five to ten depending on soil type, moisture and the product — EPA labeling requires these products to provide at least five years of protection. Annual inspections are still recommended throughout. Bait systems work differently: they protect only as long as the stations are monitored and refilled, typically checked every three to six months and maintained indefinitely.

Will insurance pay for termite treatment?

Almost never. Homeowners insurance treats insect damage as a preventable maintenance issue rather than a sudden accidental loss, and insect damage is a named exclusion on most policies, so neither the treatment nor the repairs are typically covered. The rare exceptions involve a covered peril causing the infestation, or hidden damage leading to a collapse. That gap is exactly what a termite bond exists to fill, which is why the repair-coverage tier at $200 to $500 more a year is worth pricing on an older home.

About the Author: The St Louis Near Me Directory Team
Written by a dedicated team of St. Louis locals who live, work, and play right here in the St. Louis metro. Founder Lane Forman and team are committed to building the region’s most trusted directory by verifying listings and connecting local businesses with loyal customers across Missouri and Illinois.

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