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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

21 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!

6 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

Once the animals and their young are out of the house, remove the nest and locate any entry points. Some may be difficult to find because some animals can fit through very small holes. Once you’ve located as many entry points as possible, use materials such as metal or masonry to block off the entry. Ideally, you should choose materials that most animals cannot chew through. Create a one-way door or flap to allow animals to leave but not return. Additional methods include using repellants designed to make an area unappealing to the types of animals that find your home so inviting. 

Experts provide safe, comprehensive solutions that eliminate current problems and prevent future infestations.

The time and number of treatments required to get rid of roaches depend on several factors, including the type of roach, the severity of the infestation, and the extermination method. For small infestations, a single treatment may be sufficient, with results seen in as little as 1 to 3 days. Larger or more severe infestations will require several treatments. It typically takes around 2 to 8 weeks to completely eliminate roaches in most cases, but severe infestations can take up to 6 months to fully resolve.

In certain cases, yes, the bees may go away on their own, but it’s a risk. Some bee types, such as bumblebees, create seasonal nests and then die out as their new queens seek homes elsewhere. But in most cases, you can’t count on the bees leaving naturally. It’s also not a great idea to leave openings in your walls any longer than you have to, which can attract other pests or cause moisture damage.

Poison will kill small rodents and can seem like the quick and easy way to get rid of them. But—in addition to its inhumane nature—poison has some drawbacks. First of all, if you have small children or pets in the home, setting out poison isn't the best idea, as your pets or children could ingest it. 

Poisoned mice and rodents don't die instantly. Instead, it can take several days for the poison to work its way through their system. In the meantime, there's a chance that a predator, such as a cat, fox, or other mammal, will eat the poisoned rodent and become poisoned themselves.

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.