5 Best Home Security Systems in Los Angeles (2026)

Independently ranked by our review of ratings, reviews and reputation · How we chose

By Brad Smith, Home Services Expert · ✓ Data verified August 2026 · 8 min read

Choosing a home security system in Los Angeles usually comes down to a tradeoff between a big national name and a smaller local installer who answers the phone personally. Ratings on this page run from 4.4 to a perfect 5.0, and the most-reviewed company here has logged nearly 900 Google reviews, almost all of them five stars, so the spread tells you more about company size than about who does better work.

Short answer: The most-reviewed home security installer in Los Angeles is HM Security, an ADT Authorized Dealer (a perfect 5.0 stars across 897 reviews). For a company built specifically for LA's mix of homes and businesses, Alert 360 rates 4.9 stars across 638 reviews, and smaller local installers like DVRS and CSI Security also hold near-perfect scores on a smaller base.

Jump to a business

1. HM Security
2. Alert 360 Home & Busin…
3. ACS Security
4. DVRS
5. CSI Security
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Los Angeles Security Installers, Compared

#	Business	Rating	Reviews	Best for
1	HM Security - ADT Authorized Dealer	5.0 ★	897	ADT-monitored / most reviewed	View ›
2	Alert 360 Home & Business Security Los Angeles	4.9 ★	638	Homes & business, local LA support	View ›
3	ACS Security	4.4 ★	372	Established local installer	View ›
4	DVRS	5.0 ★	103	Camera & CCTV specialist	View ›
5	CSI Security	4.9 ★	109	Fire alarm & insurance compliance	View ›

5 Best Home Security Systems in Los Angeles (2026)

Our top picks, reviewed

#1 Overall🕑 Open 7 days↩ Responds to reviews

HM Security - ADT Authorized Dealer

5.0897 Google reviews

HM Security is an ADT Authorized Dealer covering the greater Los Angeles County area, in business for twenty years selling and installing ADT-monitored security packages for homes and businesses. Its systems run on cellular back-up so they keep working without Wi-Fi or power, and the company also offers smart-home integration through Google Nest products. It has won ADT's Dealer Customer Satisfaction Award three years running.

What people praise

A perfect 5.0 average across nearly 900 reviews, the most of any installer on this page
Named technicians repeatedly praised for explaining the system and app clearly before leaving
Reviewers highlight fast turnaround, including next-day service before a trip
Owner personally involved in some jobs, according to multiple reviews

Reputation scorecardrank in Los Angeles

Rating5 / 5

Review volume897 · 98th

Confidencevery high

Recency2 months ago

Info completenesssite · phone · hours

Rating breakdown99% 5-star

✓ VerifiedSource: Google

Our take: The most-reviewed installer here by far and the only one with a perfect average at this volume, which makes it the safe default for most LA homeowners looking for an established ADT dealer.

Website +1800-377-4082 Directions

11455 Paramount Blvd Ste B, Downey, CA 90241

#2🕑 Open 7 days↩ Responds to reviews

Alert 360 Home & Business Security Los Angeles

4.9638 Google reviews

Alert 360 Home & Business Security is a security company with a dedicated Los Angeles location, offering home security systems, business monitoring, and smart automation matched to the way a specific property is used. It combines sensors, cameras, monitoring and mobile app control under one system, and its LA team also handles fire alarm and fire protection installations.

What people praise

Installers named repeatedly for taking time to explain equipment changes and letting customers record the walkthrough
Reviewers describe consultants tailoring the system to their actual needs rather than upselling
Consistently described as easy to control from a phone
Strong response and professionalism cited across multiple service visits

Worth knowing

One detailed negative review describes a system failure during a burglary and a difficult cancellation process, worth reading in full before signing a contract

Reputation scorecardrank in Los Angeles

Rating4.9 / 5

Review volume638 · 93rd

Confidencevery high

Recency2 months ago

Info completenesssite · phone · hours

Rating breakdown96% 5-star

✓ VerifiedSource: Google

Our take: A strong, professionally installed system with consistently good service reviews, though the one detailed complaint about a system failure and cancellation friction is worth weighing carefully.

Website +1213-602-9001 Directions

4740 Green River Rd Ste A, Corona, CA 92880

#3🕑 Open 7 days

ACS Security

4.4372 Google reviews

ACS Security is a Los Angeles security system installation company based in Bel Air, offering both new installations and repair service for existing alarm systems. It runs a repair plan option for existing customers and dispatches technicians for keypad and equipment troubleshooting.

What people praise

Sales and technical staff named repeatedly for professionalism and knowledge
Repair technicians praised for arriving on time and explaining the fix clearly
Repair-plan customers report no additional charge for service calls

Worth knowing

One reviewer describes a dispute over repair costs after equipment failed partway through a contract

Reputation scorecardrank in Los Angeles

Rating4.4 / 5

Review volume372 · 88th

Confidencehigh

Recency3 months ago

Info completenesssite · phone · hours

Rating breakdown82% 5-star

✓ VerifiedSource: Google

Our take: A solid, established local option, particularly strong on repair and service response, though it's worth clarifying what's covered under any service contract before signing.

Website +1310-475-9016 Directions

100 Bel Air Rd, Los Angeles, CA 90077

#4🕑 Open 7 days↩ Responds to reviews

DVRS

5.0103 Google reviews

DVRS is a Los Angeles-based security camera and CCTV installer specializing in residential and commercial video surveillance, license plate recognition cameras, and cloud video storage, serving neighborhoods across LA County and Orange County. It's built around video security specifically rather than full alarm-monitoring packages.

What people praise

A perfect 5.0 average, with every review on record rating it five stars
Multiple long-term clients describe cameras still working flawlessly years after installation
The owner is named directly and praised for hands-on, personal service
Reviewers highlight reasonable pricing and clear explanations of the electrical work involved

Worth knowing

Smaller review base than the larger national dealers on this page

Reputation scorecardrank in Los Angeles

Rating5 / 5

Review volume103 · 78th

Confidencemoderate

Recency4 months ago

Info completenesssite · phone · hours

Rating breakdown100% 5-star

✓ VerifiedSource: Google

Our take: The specialist to call if cameras and video surveillance are your main priority rather than a full monitored alarm system. Its perfect rating rests on a smaller base, but the depth of repeat, multi-year customers stands out.

Website Book now +1424-242-3877 Directions

7190 Sunset Blvd #1031, Los Angeles, CA 90046

#5🕑 Open 7 days↩ Responds to reviews

CSI Security

4.9109 Google reviews

CSI Security is a Los Angeles security and fire protection installer offering residential and commercial alarm systems, video monitoring, and fire alarm installation and monitoring. It specifically handles insurance-required monitored fire systems, a niche that comes up repeatedly in its reviews.

What people praise

Reviewers describe the team correcting poorly installed systems left behind by other companies
Named technicians praised for fixing smoke and CO alarm issues the same day
Multiple reviews specifically mention meeting insurance company equipment requirements without upselling
Owner directly involved and responsive, according to several reviewers

Worth knowing

Smaller review base than the larger dealers on this page

Reputation scorecardrank in Los Angeles

Rating4.9 / 5

Review volume109 · 83rd

Confidencemoderate

Recency3 months ago

Info completenesssite · phone · hours

Rating breakdown96% 5-star

✓ VerifiedSource: Google

Our take: A strong pick if your insurer requires specific monitored fire equipment, since that's a documented specialty here. Reviewers also credit the team with cleaning up other installers' mistakes.

Website +1310-475-3100 Directions

11400 W Olympic Blvd #200, Los Angeles, CA 90064

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How we score

Every number on this page comes from public Google data on the date shown, not from opinion or payment. Rating is the company’s live Google star average. Review volume is how many customers have rated them, ranked against other Los Angeles security installers. Confidence weighs the rating by that volume, so a 5.0 from hundreds of reviewers carries more weight than a perfect score from a dozen. Recency reflects how recently customers are still leaving reviews. No company can pay to change these numbers.

How much does a home security system cost in Los Angeles? (2026)

None of the companies on this page publish a fixed price list in their reviews or public site text, and equipment cost varies widely by system size, monitoring plan, and whether cameras are included. Get a written quote directly from each company for your specific home before deciding.

Serving all of Los Angeles

These installers cover the greater Los Angeles area, including Downey, Corona, Bel Air, Hollywood, Santa Monica and Koreatown, with several also serving Orange County. Searching for a home security company near me? Every listing below shows a live phone number so you can request a quote directly.

What to ask before you hire a security company

Is the system professionally monitored, and what’s included in the monthly monitoring fee?
Does the system have cellular back-up in case Wi-Fi or power goes out?
What’s the length of the monitoring contract, and what’s involved in cancelling?
Is the equipment owned outright or leased as part of the plan?
Do you handle fire alarm equipment required by my insurance company?

Frequently asked questions

How did you choose these home security companies?

We started from security system installers in Los Angeles with a public Google presence, then ranked by rating, review volume, consistency, and recency. See How we score above.

Are these rankings paid?

No. Rankings come from the public Google data in the scorecard. A business can pay to be a Featured Partner, which adds a badge and top placement, but that never changes another business’s score or position on the underlying data.

How often is this updated?

The data carries a verified date (August 2026 on this page). We refresh listings periodically so ratings and review counts stay current.

Which company should I call for cameras specifically, not a full alarm system?

DVRS specializes in security cameras and CCTV rather than full alarm monitoring, and its reviews focus heavily on video installation work.

Do I need a monitored system, or can I install my own?

That depends on your insurance requirements and how you want alerts handled. Ask each installer whether their systems include professional monitoring and what happens if an alarm triggers while you’re away.

The bottom line

HM Security is the safe default on sheer review volume and a perfect rating behind an established ADT dealer, while DVRS and CSI Security are worth a call for camera-specific or insurance-compliant fire work. Get at least two written quotes before deciding.

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