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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
Additional Photos
Additional Photos
Additional Photos
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

"Last weekend had someone pry our side door open to our exterior garage and the ADT door sensor picked it up immediately. The alarm siren was loud and scared the person off. Someone from the response center called within 30 seconds. We’re fortunate that the security system did what it is supposed to. Feels like we made the right call going with an ADT security system."
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

"I switched from another company to Security One, they use the same equipment. They had to come out and recode everything. I simply switched because of the financial benefit. I have only had them for a few months, and I haven't had any problems with them. They save me some money every month.  When my alarm went off, they did call me."
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

It is possible to spend only $30 on a camera that can cover one particular area. You wouldn't need to buy software, hardware, cables, or anything else. Instead, it would connect wirelessly to an app on your phone where you could monitor the feed and take necessary actions at your own discretion.

To prevent false alarms, motion detectors need proper placement and settings. Start by installing them away from pets and windows where outside movement could set them off. Adjust the sensitivity settings to reduce the likelihood of it detecting minor motions. Consider using dual-tech sensors, for example passive infrared (PIR) and microwave technology, to improve accuracy and reduce false alarms. And don’t forget regular maintenance—cleaning the sensor and checking for any obstructions can go a long way in making sure your detectors run smoothly.

Whether a security system or security cameras is a better choice for you depends on your needs and preferred comfort level. A security system can cost more depending on the features you choose, but it’s a more proactive and protective approach to home security by alerting you and authorities of any emergencies. Using a security camera system is a more reactive approach because while you can monitor the camera footage, it does not alert the proper authorities for you.

Smart deadbolts are a worthwhile investment for homeowners seeking more convenience, flexibility, and advanced features than a traditional deadbolt can provide. While a strong conventional deadbolt offers sufficient security for most, smart deadbolts provide significant upgrades.

Key benefits include keyless entry via smartphone, keypads, or biometric sensors, and the ability to lock or unlock your door remotely. You can also manage access for guests by creating temporary codes, eliminating the need for physical keys and the risk of them being lost or duplicated. Many models integrate with smart home systems and offer features like automatic locking, entry-exit monitoring, and tamper alerts with encryption for enhanced security.

However, there are downsides to consider. Smart deadbolts are more expensive than their traditional counterparts and rely on batteries and wireless networks to function. This dependency introduces potential vulnerabilities, such as hacking by skilled intruders and privacy concerns. Installation can also be more complex. Despite these drawbacks, the added layer of convenience and protection makes them a compelling option for many.

Changing the alarm in your wireless security system is a perfectly reasonable DIY task that most people can complete on their own. Simply open the system’s control panel, remove the existing battery, and replace it with a new one. If you’re using a wired system, this may require disconnecting and reconnecting both the positive and negative wires attached to the battery, and you may want to call in a professional to help. 

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.