Knollwood is a small city in Grayson County, Texas, located just north of Sherman along U.S. Highway 75. The city is primarily residential and is situated near the western edge of the Red River Valley, offering convenient access to both Sherman and nearby recreational areas like Lake Texoma. Knollwood was incorporated in 1972 and is known for its quiet neighborhoods and proximity to regional employers in Sherman. From Lake Texoma to Post Oak Creek, Romex treats Grayson County properties with proven local expertise and same-day response.
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Note: We do not service trailer homes or vehicles.
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Romex is now part of the Rollins, Inc. family—a Fortune 500 leader behind Orkin, HomeTeam, and other trusted names in pest control. What does that mean for you? The same local Knollwood technicians you already know and trust, now backed by national-scale training, research, and resources. Your service doesn't change. It only gets stronger.
Population: ~432 · Grayson County
Knollwood is a small city in Grayson County, Texas, located just north of Sherman along U.S. Highway 75. The city is primarily residential and is situated near the western edge of the Red River Valley, offering convenient access to both Sherman and nearby recreational areas like Lake Texoma. Knollwood was incorporated in 1972 and is known for its quiet neighborhoods and proximity to regional employers in Sherman.
Knollwood sits on gently rolling terrain with clay and loam soils characteristic of the Blackland Prairie region of North Texas. The city is at an elevation of approximately 750 feet, with drainage influenced by nearby tributaries of Post Oak Creek. Its proximity to the Red River and Lake Texoma supports a variety of native vegetation and creates habitats that can harbor both urban and rural pests.
Primary residential area with single-family homes and mature trees.
Mosquitoes from nearby creeks and occasional rodent activity due to adjacent open fields.
Northern edge of the city bordering rural land and open lots.
Increased wildlife intrusion, including raccoons and opossums, especially in spring.
Area closest to U.S. Highway 75 and commercial activity.
Ant infestations and periodic issues with cockroaches due to higher traffic and nearby businesses.
What our licensed technicians see on the ground in Grayson County.
Termite pressure in Knollwood reflects the region's humid subtropical climate and long warm season. Homes built on concrete slabs — particularly in neighborhoods like Knollwood Heights — provide subterranean colonies hidden access through plumbing penetrations and expansion joints. Mature tree canopies near Lake Texoma contribute to elevated soil moisture that accelerates colony growth. Romex certified applicators conduct annual monitoring with non-invasive bait stations and thermal imaging, catching active tubes before structural damage reaches the sills or sub-floor. Warranty-backed liquid treatments from Termidor or Taurus SC seal the perimeter for up to ten years.
Prevention tip: Keep mulch, firewood, and landscaping timbers at least 12 inches away from foundation walls and never stack firewood against the house.
Mosquito populations in Knollwood surge from April through October, driven by heavy spring rainfall and standing water that collects in gutters, bird baths, bromeliad pockets, and drainage ditches. North Knollwood sees particularly high pressure because increased wildlife intrusion, including raccoons and opossums, especially in spring.. Our service crews have documented heavy activity within 500 feet of Post Oak Creek, where untreated vegetation provides daytime harborage for Aedes albopictus and Culex quinquefasciatus. We apply In2Care stations and barrier treatments with Talstar P that last up to 30 days per application.
Prevention tip: Walk your property weekly and dump any standing water — a discarded bottle cap can breed 300 mosquitoes in seven days.
Ant diversity is high in Knollwood: we routinely identify fire ants, sugar ants (odorous house ants), rover ants, acrobat ants, and carpenter ants on a single property. Knollwood Heights is a textbook case — mosquitoes from nearby creeks and occasional rodent activity due to adjacent open fields. Near Lake Texoma, crazy ants have been documented on a few properties, requiring specialized bait protocols. Romex applicators never recommend over-the-counter aerosols for trails because they scatter satellite colonies and make the problem worse.
Prevention tip: Seal gaps around exterior pipe penetrations and weather-stripping; most indoor ant trails originate at these entry points.
Oriental cockroaches ("black beetles") thrive in the cool, damp spaces under Grayson County homes — crawl spaces, storm drains, and garage corners. Knollwood Heights homeowners call about them most often in early fall, when roaches seek warmer harborage. Our inspection covers the foundation perimeter for harborage (leaf litter, mulch depth, downspout splash zones) before any product goes down. We follow up with crack-and-crevice Premise 0.05 applications in areas of high moisture.
Prevention tip: Inspect any secondhand appliance (especially microwaves, toaster ovens, mini fridges) before bringing it indoors — German cockroaches hitchhike inside.
Our technicians understand Knollwood's unique Blackland Prairie clay soils and how they affect pest movement and treatment effectiveness.
We target breeding sites along Knollwood's drainage creeks with specialized larvicide treatments to break mosquito life cycles.
Expert raccoon and opossum exclusion services for homes near Knollwood's open fields, especially during active spring intrusion season.
Quick service to all Knollwood neighborhoods including Knollwood Heights with our nearby DFW regional technicians.
All Romex technicians are licensed by the Texas Department of Agriculture (TDA) and follow state guidelines for pesticide application. Some Knollwood neighborhoods may have HOA landscaping requirements that affect pest control placement.
Knollwood experiences a humid subtropical climate, with average summer highs near 94°F and winter lows around 33°F. Annual rainfall averages close to 40 inches, with high humidity in spring and summer months. This climate favors the proliferation of mosquitoes, ants, and termites, especially after heavy rains.
Knollwood's proximity to Post Oak Creek and the wooded areas of the Red River Valley contribute to persistent mosquito and tick populations. Rich loam and clay soils are conducive to termite colonies, while the mix of urban and open land supports rodents and occasional wildlife pests. The city's tree cover and nearby water sources increase pest habitats, especially during wet seasons.
Spring rains and warming temperatures promote termite swarms and a surge in mosquito breeding along Post Oak Creek. Ant activity also increases in residential yards.
High heat and humidity drive peak mosquito populations, especially near water. Wasps and ants become more aggressive, and spider sightings increase in shaded areas.
Cooler nights push rodents indoors, while spiders and ants remain active as they seek shelter. Pest pressure shifts from outdoors to inside homes.
Rodents look for warmth in garages and attics, and cockroaches may invade homes from surrounding fields and businesses near the highway.
Pro Tip: Knollwood homeowners save up to 40% with year-round protection plans that proactively treat for seasonal pests before they become infestations.
Due to its location near Post Oak Creek, Knollwood has historically seen occasional increases in mosquito-borne illnesses, prompting community-wide pest control efforts after major rain events.
TDA-licensed professionals serving Grayson County since 2016. Full liability and workers' compensation coverage.
Professional pest control tailored to Knollwood's local conditions. Targeted treatments that minimize chemical use while maximizing effectiveness. We also guide homeowners on IPM strategies they can implement between visits.
Certified specialists in Sentricon® Always Active™ termite baiting. Essential protection for Grayson County properties.
Direct, straightforward answers to the most common pest control questions we hear from homeowners and property managers in Knollwood. Pricing always depends on the size of your property and the severity of the infestation — schedule a free inspection for a tailored quote.
Real pest treatment data from our Knollwood service records — not estimates.Updated April 2026
Quarterly & preventive treatments for common household pests
Targeted treatments requiring specialized protocols & equipment
Knollwood's diverse climate zones create unique pest challenges across the state, from Gulf Coast humidity to arid western regions.
Texas's size and climate diversity mean pest pressures vary significantly by region. Gulf Coast areas battle moisture-loving pests like termites and cockroaches, while central and west Texas deal with drought-adapted species like scorpions. Understanding your local pest ecosystem is crucial for effective control.
Year-round pest activity requires consistent monitoring and treatment
Climate zone determines primary pest threats - coastal vs. inland strategies differ
Integrated Pest Management (IPM) combining exclusion, sanitation, and targeted treatment works best
Fire ant management requires community-wide efforts for best results
Verified reviews from Knollwood and surrounding areas
Reviews are from Google Business Profile and updated weekly
See all reviews on GoogleComprehensive protection against common household pests
Romex technicians route through Knollwood daily. The map below shows the city and surrounding area we serve.
Spring activity — schedule preventive treatment now.
“Romex solved our terrible mosquito problem near the creek in North Knollwood. Haven't had issues since their seasonal treatments started!”
Knollwood sits in Grayson County, where knollwood sits on gently rolling terrain with clay and loam soils characteristic of the Blackland Prairie region of North Texas. The city is at an elevation of approximately 750 feet, with drainage influenced by nearby tributaries of Post Oak Creek. Its proximity to the Red River and Lake Texoma supports a variety of native vegetation and creates habitats that can harbor both urban and rural pests. These local features shape which pests thrive here. Romex Pest Control builds every treatment plan around this knowledge. We use biological, cultural, physical, and chemical methods endorsed by the EPA. The goal is simple: manage pests with less risk to your family, property, and the environment.
Knollwood's proximity to Post Oak Creek and the wooded areas of the Red River Valley contribute to persistent mosquito and tick populations. Rich loam and clay soils are conducive to termite colonies, while the mix of urban and open land supports rodents and occasional wildlife pests. The city's tree cover and nearby water sources increase pest habitats, especially during wet seasons. Knollwood experiences a humid subtropical climate, with average summer highs near 94°F and winter lows around 33°F. Annual rainfall averages close to 40 inches, with high humidity in spring and summer months. This climate favors the proliferation of mosquitoes, ants, and termites, especially after heavy rains. Because of these local pressures, our technicians change their approach month to month. In spring, we focus on moisture control and perimeter barriers. Summer means targeting mosquito breeding sites. Fall calls for rodent exclusion as temps drop. Winter treatments tackle cockroaches and other pests that stay active indoors.
Every Romex treatment in Knollwood follows four steps: inspect, identify, treat, and monitor. After the first service, we set up regular check-ins to catch new pest activity early. In neighborhoods like Knollwood Heights, North Knollwood, South Knollwood, our technicians see distinct pest patterns—mosquitoes from nearby creeks and occasional rodent activity due to adjacent open fields.. This proactive approach means less product overall and longer-lasting results for Knollwood homeowners.
When you book pest control with Romex in Knollwood, you get a treatment program built for Grayson County conditions. Near Lake Texoma and Post Oak Creek, the surrounding greenery and foot traffic contribute to pest activity year-round. Here is what to expect from your first visit through ongoing protection:
Your Romex technician inspects your Knollwood property inside and out. We check the foundation, attic, crawl spaces, plumbing entry points, landscaping, and moisture-prone spots. Because Knollwood’s terrain features knollwood sits on gently rolling terrain with clay and loam soils characteristic of the blackland prairie region of nort, we pay close attention to moisture pathways and soil-contact points. We document every finding and share it with you before treatment starts.
Getting the ID right matters. Different pest species need different treatments. Our technicians pinpoint the exact species, check population levels, and assess risk factors for your property. In Knollwood, pest pressures vary by neighborhood. Knollwood Heights tends to see mosquitoes from nearby creeks and occasional rodent activity due to adjacent open fields. Meanwhile, North Knollwood faces different challenges: increased wildlife intrusion, including raccoons and opossums, especially in spring. We also look for conditions that attract pests—standing water, wood touching soil, and gaps in exterior seals.
Based on what we find, we apply targeted treatments chosen for the pests on your property. We keep exposure low for your family and pets. Options include perimeter barriers, crack-and-crevice treatments, baiting systems, granular products, and exclusion work. For termite protection in Knollwood, we offer Sentricon® Always Active™ bait stations—the most trusted colony removal technology available. All products are applied by Texas Department of Agriculture (TDA)-licensed technicians.
Pest control is not a one-time fix—especially in Texas's climate. After your first treatment, we set up recurring visits on an every-other-month to quarterly cadence (roughly every 60 to 90 days) to refresh the residual product barrier before it can weaken to the point of becoming ineffective. Whether you are in Knollwood Heights or South Knollwood, our schedule fits the specific pressures in your part of Knollwood. Between visits, our satisfaction guarantee means if pests come back, so do we—at no extra cost.
Your Knollwood home deserves year-round pest protection. Our residential programs cover the most common invaders: ants, spiders, cockroaches, rodents, mosquitoes, and fleas. Given Knollwood’s landscape—knollwood sits on gently rolling terrain with clay and loam soils characteristic of the blackland pr—we target entry points and hiding spots specific to this area.
Plans include initial indoor and outdoor treatment, regular perimeter care, web removal, wasp nest removal, rodent checks, and seasonal treatments. We work during time windows that fit your schedule and always clean up. Most treatments need just 30 to 60 minutes before re-entry. That makes them safe and easy for busy Knollwood families with kids and pets.
Knollwood businesses face their own pest challenges. Restaurants, retail stores, warehouses, offices, and healthcare buildings each have different rules and risks. Properties near busy spots like Lake Texoma need proactive programs that stop pest sightings before they hurt a business’s reputation.
Our commercial programs include service reports, compliance-ready records, discreet vehicles and uniforms, after-hours scheduling, and emergency response for surprise sightings. We work with Knollwood property managers, restaurant owners, and facility directors across Grayson County to build pest plans that protect their staff, customers, and reputation.
Professional pest control is most effective when combined with good prevention habits. In Knollwood, knollwood experiences a humid subtropical climate, with average summer highs near 94°F and winter lows around 33°F. Annual rainfall averages close to 40 inches, with high humidity in spring and summer months. This climate favors the proliferation of mosquitoes, ants, and termites, especially after heavy rains. Here are practical steps Knollwood homeowners can take between service visits to reduce pest attractants:
Fix leaky faucets. Make sure water drains away from your foundation. Use dehumidifiers in damp basements or crawl spaces. With Knollwood’s waterways nearby, moisture control is extra important. Check sprinkler systems often to stop standing water near your Knollwood home's foundation.
Trim tree branches and shrubs at least 18 inches from your home. Clear leaf litter, mulch buildup near foundations, and dead wood from your yard. Keep firewood at least 20 feet away and off the ground. Good yard care around Grayson County homes cuts down hiding spots for spiders, ants, and rodents.
Check your Knollwood home for gaps around pipes, foundation cracks, torn screens, and spaces under doors. Even tiny openings let in insects and mice. Seal them with weatherstripping, door sweeps, caulk, and steel wool. Knollwood’s soil can shift and create new gaps. Check your seals each season.
Every Knollwood property is different, so pest control pricing is quoted based on two main factors: the size of your property and the type and intensity of the pest problem. Romex provides free inspections and transparent, upfront pricing with no hidden fees—so you know exactly what to expect before any work begins.
Larger homes and commercial properties require more product, more time, and broader perimeter coverage. Your quote reflects the actual square footage and layout of your Grayson County property—not a one-size-fits-all estimate.
A minor ant issue costs less than a severe termite infestation or a multi-room rodent problem. We assess the species, severity, and access points during your free inspection so the quote matches the actual work needed.
Targeted visit for a specific pest issue or seasonal flare-up.
Year-round protection with seasonal adjustments. Most popular for Grayson County homes.
Sentricon® baiting system installation and ongoing monitoring.
Get a free pest control quote today and join hundreds of satisfied customers in Knollwood.
