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The 10 Best Alarm Installations in Charleston (2026)
We compiled this list using Google review data and a Bayesian scoring method that weights a business’s average rating by how many people reviewed it, updated through 2026. Charleston-area residents and property managers look for installers who combine reliability, clear communication, and compatibility with existing systems; our ranking shows who customers rate most highly while rewarding volume of feedback. This category covers firms that identify as security system installers as well as related audio, car-security and tint shops that list installation services on Google. Use this guide to narrow options and then call prospective installers to discuss your property’s specific needs and timelines.
This ranking is computed from Google reviews (our method). Listings marked Partner are paid advertising spots: they sit alongside the ranking without changing its order.
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Alarm Alert SC
Alarm Alert SC tops our list because it posts a perfect 5.0 Google rating supported by 178 reviews, which gives it the highest weighted score in this dataset. Google lists it as a Security system installation service and the listing shows an address in Florence, SC. That combination of flawless average rating and substantial review volume is why it outranks other entries under our Bayesian approach.
The full ranking
Car Audio, Radio and Security, Window Tint too
Based in Charleston, Car Audio, Radio and Security, Window Tint too carries a 4.9 rating from 452 reviews and is categorized on Google as a Window tinting service.
452 reviews
Charleston Security Systems
With 225 reviews, Charleston Security Systems maintains a 4.9 Google rating and is listed under Security service at an address in North Charleston, SC.
225 reviews
Vivint
Vivint appears as a Security service with a 4.8 rating across 1,082 Google reviews; no street address was provided in the dataset.
1082 reviews
Custom Car Stereo
Custom Car Stereo is listed as a Car security system installer with a 4.8 rating from 828 reviewers and a Charleston address on Sam Rittenberg Boulevard.
828 reviews
Strand Security, LLC
Strand Security, LLC has a 4.9 Google rating based on 61 reviews and is categorized as a Security system installation service with a Murrells Inlet address.
61 reviews
Carolina Custom Security & Sound
Listed as an Audio visual consultant in Mt Pleasant, Carolina Custom Security & Sound holds a 5.0 rating from 33 Google reviews.
33 reviews
SNAP Integrations
SNAP Integrations carries a 4.9 rating from 40 reviewers and appears under Security system installation service with a Charleston address on Jenkins Road.
40 reviews
Premier Sound Security & Automation
Premier Sound Security & Automation posts a 4.9 rating from 35 reviews and is listed as a Security system installation service at an address in North Charleston.
35 reviews
ASI Solutions
ASI Solutions has a 4.7 rating from 58 Google reviewers and is categorized as a Security system installation service with a North Charleston address.
58 reviews
Frequently asked questions
How do I choose the right alarm installation company?
Look for recent customer reviews, clear written estimates, and proof of relevant licensing or insurance. Ask about system compatibility, monitoring options, warranty and expected response times so you can compare proposals on the same scope.
What does alarm installation typically cost?
Costs vary widely depending on system complexity, number of sensors, whether monitoring is included, and if existing wiring can be used. Get multiple written quotes and compare what is included—equipment, labor, activation fees, and any ongoing monitoring charges.
What should I check before the installer arrives?
Identify where you want sensors, cameras and a control panel and make sure power and internet access are available where needed. Have any relevant paperwork handy, ask about required permits, and confirm the installer’s expected arrival window and access instructions.
How was this ranking built and when was it updated?
This list is based on Google review data and a Bayesian-style score that weights the average rating by the number of reviews to balance high scores with review volume. The ranking was generated from the Google entries shown and updated through 2026.