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TRUSTED BY DERRY, NH HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon191
    Verified security door installation services reviews

Top-Rated Security door installation pros in Derry - Updated Nov 2026

Avatar for SafeStreets - ADT Authorized Provider
SafeStreets - ADT Authorized Provider
4.8(
320
)
Security Bars - Install or Repair - For Business

Serving Derry, NH and surrounding areas

Approved (Corporate)

In business since 2010

Free estimates

Emergency services offered

"SafeStreets’ alarm system is fantastic. The motion sensors, door/window contacts, and cameras work flawlessly. The home automation features are a huge plus—I can control everything from my phone. Highly recommend SafeStreets to anyone looking for reliable security."
Additional Photos
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Additional Photos

+1

4 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for ADT
ADT
4.5(
889
)
Security Bars - Install or Repair - For Business

Serving Derry, NH and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1874

Free estimates

Emergency services offered

"My next door neighbor's house was robbed last week, and I realized that I needed to do something to give me further peace of mind. Purchased new home security with ADT and opted to get the premium options with flood detection and carbon dioxide monitoring. Keep up the nice job ADT!"
Home Security Essentials
Smart Home Security
Cameras
Our Team
Home Security Essentials

+35

36 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Hackworth Fire and Security LLC
Hackworth Fire and Security LLC
4.9(
21
)
Security Bars - Install or RepairSecurity Bars - Install or Repair - For Business

Serving Derry, NH and surrounding areas

Approved

In business since 1995

Free estimates

Credit card accepted

Hackworth Fire & Security, LLC, protects the things that matter. We serve residential and commercial security needs. Our trained technicians can install and maintain any major manufactured security system available. We offer security systems that are user friendly, and very reliable. Call us first!

Keypad
Garage
Response time12 hrs
7 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Cairn Home Co
Cairn Home Co
4.7(
6
)
Security Bars - Install or RepairSecurity Bars - Install or Repair - For Business

Serving Derry, NH and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

Cairn Home Co. is Southern New Hampshire's premium home-technology and home-improvement partner, based in Windham. We handle the modern home end to end — smart home automation, security cameras and video doorbells, home theater and AV, WiFi and networking, smart lighting and locks — alongside licensed electrical work, HVAC, plumbing, water heaters, EV chargers, and full kitchen and bathroom remodeling. We also handle the small stuff most companies won't: TV mounting, device setup, and in-home tech help.\n\nWhat sets us apart is how we work: we respond within minutes, show up exactly when we say we will, keep the job site clean, and communicate every step. Licensed and insured. Free, no-pressure estimates. Whether it's a single camera or a full remodel — your home, handled.

18 neighbors recently requested a quote
Avatar for Frontpoint
Frontpoint
4.7(
8,819
)
Security Bars - Install or Repair - For Business

Serving Derry, NH and surrounding areas

In business since 2007

Free estimates

Emergency services offered

"Delivery was delayed due to credit inquiry. After the concern was raised, shipment was rushed to us. Self installation didn't go as easy. Issue was resolved over the phone. The glass break sensor was a bit sensitive to loud noise such as cabinet door closing and door sensor repeatedly falls off and had to be reattached. Notification of alarm activation was fast and made to the right contact numbers. This prevented false alarm calls to the police."
Recommended by93%of homeowners
Avatar for Security One
Security One
4.1(
456
)
Security Bars - Install or Repair - For Business

Serving Derry, NH and surrounding areas

In business since 2007

Credit card accepted

"We have our second home in the mountain so they were able to send it and he was able to work with our installers and it worked out fine. So far we were are pleased with it. We were with another security system for 12 years and we changed because their selection of product was of a higher grade. They are excellent."
Pictures
Compare our Compact Door Sensors to our Competitors
Additional Photos
Additional Photos
Additional Photos

+16

Recommended by84%of homeowners
Avatar for CSI Secure Solutions
CSI Secure Solutions
4.4(
114
)
Security Bars - Install or Repair - For Business

Serving Derry, NH and surrounding areas

In business since 2001

Free estimates

Emergency services offered

"CSI Secure Solutions were very prompt with their communication. The information given was what I requested. I found this investigative service very helpful and very professional. I would definitely use again in the future.
"
Background Checks
Employee Check
Background Report
Surveillance
Infidelity Monitoring

+12

Recommended by85%of homeowners
Avatar for Protect Your Home
Protect Your Home
3.3(
325
)
Security Bars - Install or Repair - For Business

Serving Derry, NH and surrounding areas

In business since 1998

Credit card accepted

"That's the name I am vaguely familiar with; it's a home security company that is license to ADT franchise or dealer if I am correct.  They were very good.  They were prompt; they were quality.  The individuals move their business.  They were very timely and it was a good experience."
Protect Your Home Vehicle
Recommended by63%of homeowners
Avatar for Protect America Home Security
Protect America Home Security
3.5(
227
)
Security Bars - Install or Repair - For Business

Serving Derry, NH and surrounding areas

In business since 1992

Free estimates

Emergency services offered

"First the good:
The up front cost cant be beat since all of the sensors and control panel were no cost to cover 20 doors and windows.  Installation was pretty straight forward and the phone reps were fairly knowledgeable and professional.  I added a couple features like an extra key pad, siren and glass break sensors that cost aprox $350.  The extras were a little pricey but compared to the $2000 another provided quoted, it was still a deal.
The control panel is cellular based so cutting your phone lines will not effect the alarm.
Now the not so good:
The quality of the sensors has not been very good.  I have had 2 DOA when the packages arrived new and 2 failed within several days.  When I contacted Protect America they were very nice about sending me new ones, but it took weeks and a couple calls before I saw the first replacements.  The second set of replacements that arrived for the failed units ended up being the wrong sensors.  Their shipping department does not seem to have good quality control.  The next very annoying element is the wait time on the phone when you are trying to get anything set up.  I spent a couple hours on hold working through the set up the first time and at least an hour the second time when I installed the replacement sensors.
Some cautions; make sure you hide the main control panel because if an intruder disables it before the alarm has sounded for 60 seconds, the police may not be notified.  Also they only call to check if everything is ok if the alarm is not canceled for 60 seconds.  So you can not be sure if the signal is getting through.
Monthly monitoring fee is high, but since the system was intially free, even after 3 years it is still the cheaper route.
Now that I have the equipment, once our contract is expired I will find a different alarm provider that responds to every alarm.
"
Platinum Package - Protects up To 15 Doors / Windows for FREE
Protect your Whole Home
Simon XT Touchscreen
Recommended by64%of homeowners
Avatar for Main Street handyman
Main Street handyman
5.0(
11
)
Security Bars - Install or Repair

Serving Derry, NH and surrounding areas

Free estimates

Credit card accepted

\nWe offer a wide range of handyman services in Fremont, NH and surrounding communities. Whether you need something installed, built, fixed or maintained, we are your reliable and local handyman for all handyman services, remodeling handyman, home repairs.

Erins bath remodel
Erins bath remodel
Completed
Completed
New barn door

+12

Recommended by90%of homeowners
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Security Doors FAQs, answered by experts

Thieves can open almost anything with enough time and the right tools, but they also prefer easy targets that are unlikely to get them caught. Forcing open gates is loud and difficult, and to be able to open one electronically requires extensive knowledge of the system, which most thieves don't have. Electric and other security gates are great deterrents because the thief will move to an easier target. If the thief is determined to enter your property, they will most likely find a different entrance point.

You don’t need to completely revamp your security system constantly, but it’s a great idea to give it a once-over every year. Look for potential upgrades or new features—like smart home tech or replacing outdated equipment—that could boost your safety. If you make any significant changes, let your insurer know as they may adjust your discounts to reflect your improved security. Staying on top of your security not only keeps your home safe but ensures you’re getting the best possible rate on your insurance.

If you want to make more home security upgrades to your perimeter, consider installing a smart automatic gate opener and a security camera. These will allow you to see who’s at the gate and open it for them (or not). You can learn how to install an automatic gate opener yourself or hire a professional for a little extra.

The average cost to install a home security system is about $750. However, the price can range from as little as $200 for a simple wireless camera setup to $2,000 for a fully monitored, hardwired system. A typical price range is $280 to $1,150. Several factors determine the final cost, including the type of system, equipment, materials, labor, activation fees, monthly surveillance fees, and permits. Optional upgrades will also add to the price, such as video surveillance monitoring ($40–$65 per month), smart locks ($150), smart lighting ($15–$90), smart smoke and carbon monoxide alarms ($35–$100), and a smart thermostat ($130–$500).

Yes, you should always change your locks after buying a house. Do so as soon as possible after you move in. Otherwise, you won’t know who has working keys to the property, whether they’re spare keys or otherwise. If an intruder gains access to your house with a key, it may not be covered under your homeowners insurance.

The Derry, NH homeowners’ guide to security door installation services

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