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Top-Rated Pest control specialists in Andover - Updated Nov 2026

Avatar for Colonial Pest Control Inc
Colonial Pest Control Inc
4.8(
263
)
Pest Control - Bugs and InsectsPest Control - RodentsPest Control - Termite

Serving Andover, NH and surrounding areas

Approved (Corporate)

In business since 1984

Free estimates

Emergency services offered

"Dave was excellent. He was professional, honest and thorough. I thought I may have squirrels in the house because I heard scratching above a ceiling and saw a squirrel climbing my chimney with acorns in it's mouth.  
Dave inspected all the outside areas of my house and looked in my attic. He found no evidence of squirrels or bats or anything else (other than a few mice that I can take care of).
He screened off my two gable vents and recommended securing a couple of other entry prone areas which I can do.
I highly recommend Colonial Pest Control.
"
Project Photos
Tech introduction
Tech spray ext
Tech kitchen
Tech ladder

+5

25 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Ehrlich Pest Control
Ehrlich Pest Control
4.3(
11
)
Mosquito ControlPest Control - Bed BugsPest Control - Bugs and Insects+2 more

Serving Andover, NH and surrounding areas

Approved

In business since 1921

Free estimates

Credit card accepted

"I had a fantastic experience with Ehrlich Southeast. Their customer service was excellent, from scheduling the appointment to the completion of the service. Their technicians were friendly, knowledgeable, and efficient, and they ensured my property was pest-free. I highly recommend them to anyone in need of pest control services."
Recommended by100%of homeowners
Avatar for A1 Exterminators, Part of the Ned's Home Family
A1 Exterminators, Part of the Ned's Home Family
4.0(
3,189
)
Pest Control - Bugs and InsectsPest Control - RodentsPest Control - Small Animals+2 more

Serving Andover, NH and surrounding areas

Approved

In business since 1965

Free estimates

Credit card accepted

Since 1953, A1 Exterminators has provided quality pest control and extermination services throughout Massachusetts, Cape Cod, Martha's Vineyard, Rhode Island, Southern New Hampshire and Maine.\nWe're excited to announce that A1 Exterminators, a trusted name in pest control, is now proudly part of Ned's Home! With a legacy of protecting homes and businesses across Massachusetts, New Hampshire, Rhode Island and Maine for over 70-years, this transition ensures that A1 customers will continue receiving the same expert residential and commercial pest control and extermination services, now with the added strength and resources of Ned?s Home, a leader in home maintenance solutions.\n\nChoose A1 Exterminators for all your pest control and extermination needs and experience the difference our quality service can make!

7 neighbors recently requested a quote
Recommended by88%of homeowners
Sully's Pest Services, LLC
5.0(
2
)
Mosquito ControlPest Control - Bed BugsPest Control - Bugs and Insects+3 more

Serving Andover, NH and surrounding areas

In business since 2022

Free estimates

Credit card accepted

"Shawn came out to my house within 24 hours, quickly assessed the wasp infestation in my backyard shed, and treated them on the spot. He returned six days later to check on everything and remove the empty nest, which my family and I greatly appreciated. Shawn’s communications with me via text, phone and email were outstanding throughout the process. I highly recommend Sully’s!"
Response time1 day
Terminix
3.4(
35
)
Pest Control - Bed BugsPest Control - Bugs and InsectsPest Control - Termite

Serving Andover, NH and surrounding areas

In business since 1927

"The person who came to the house was very nice and professional, but they are obviously very poorly trained because he told us that we had "march flies" and our second and third opinions told us that they looked nothing like a march fly. First, they told us they were termites, then march flies. They are neither."
Recommended by45%of homeowners
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Pest Control FAQs, answered by experts

The time of day that most snakes are active is at night. This is when they prefer to hunt since they can do so under the cover of darkness, out of sight of predators and the prey they stalk. However, some snake species prefer very hot temperatures and are strictly active during the day.

Seeing a termite swarm near your home is a strong indication that a colony is nearby, but it doesn’t always mean your home is infested. Swarmers may emerge from outdoor colonies or neighboring structures. However, if the swarm is inside your home or you notice discarded wings near windowsills, it likely means termites are nesting within your walls or foundation. A professional inspection is the best way to confirm and address a potential infestation ASAP.

Experts have mixed opinions about spraying spiders. A recent study found that chestnut and peppermint oil have a repelling effect on some spider species, but were ineffective at repelling others. You should consult with an expert exterminator to find out what works best to repel the spiders living in and around your home.

For a minor infestation, you can expect to clear up a German cockroach problem in about two weeks. That’s usually enough time to confirm that they don’t have additional hiding spots and aren’t continuing to encroach from an outside source. If you have a major infestation and use the services of a pest control company, it can take several weeks and multiple visits to fully clear your home, up to a couple of months.

Luckily, spiders rarely “infest” a home like many other pests. They don’t tend to live in groups except when first born, and prefer their space. But you can prevent them from gaining entry by making sure your home is well-sealed and free of other insects. You can also lay down barrier sprays or powders designed to repel or kill spiders. Professionals can also lay down these barriers to prevent future spider problems.

The Andover, NH homeowners’ guide to pest control services

From average costs to expert advice, get all the answers you need to get your job done.