# Fire alarm companies in Denton, Texas

2 fire alarm companies with an active Texas SFMO Fire Alarm Certificate of Registration (ACR) have a location in Denton, Texas, as of October 24, 2026. 15 more are elsewhere in Denton County.

Sale, installation, inspection, testing, monitoring and service of fire alarm and detection systems.

## Located in Denton

- [CGI Systems Group LLC](https://plumbregistry.com/fire-protection/providers/cgi-systems-group-llc/) — based in Denton, TX; fire alarm; registrations: ACR-2734807; phone: 940-465-7709
- [Focal Point Security Systems Inc](https://plumbregistry.com/fire-protection/providers/focal-point-security-systems-inc/) — based in Denton, TX; fire alarm; registrations: ACR-2049521; phone: 469-803-2200

## Elsewhere in Denton County

- [AK 247 Fire LLC](https://plumbregistry.com/fire-protection/providers/ak-247-fire-llc/) — based in Aubrey, TX; fire alarm; registrations: ACR-2278871; phone: 940-320-2247
- [All Test Fire Protection LLC](https://plumbregistry.com/fire-protection/providers/all-test-fire-protection-llc/) — based in Argyle, TX; fire alarm, fire extinguisher and fire sprinkler; registrations: ACR-2120768, ECR-2120464, SCR-G-2112282; phone: 817-379-0856
- [Customized Security Services, LLC](https://plumbregistry.com/fire-protection/providers/customized-security-services-llc/) — based in Princeton, TX; fire alarm; registrations: ACR-2696; phone: 972-734-6506
- [Defender Protection Inc](https://plumbregistry.com/fire-protection/providers/defender-protection-inc/) — based in Carrollton, TX; fire alarm; registrations: ACR-1654730; phone: 972-307-2222
- [Double Oak Consulting LLC](https://plumbregistry.com/fire-protection/providers/double-oak-consulting-llc/) — based in Lewisville, TX; fire alarm; registrations: ACR-2441626; phone: 682-549-0002
- [Entech Sales & Service LLC](https://plumbregistry.com/fire-protection/providers/entech-sales-service-llc/) — based in Dallas, TX; fire alarm and fire extinguisher; registrations: ACR-1404, ECR-1916816; phone: 972-241-8188
- [Greyhaven Smart Systems LLC](https://plumbregistry.com/fire-protection/providers/greyhaven-smart-systems-llc/) — based in Lewisville, TX; fire alarm; registrations: ACR-2712258; phone: 972-469-4476
- [Jeffery Walner LLC](https://plumbregistry.com/fire-protection/providers/jeffery-walner-llc/) — based in Little Elm, TX; fire alarm; registrations: ACR-3527820; phone: 469-970-3301
- [North Texas Fire Systems, LLC](https://plumbregistry.com/fire-protection/providers/north-texas-fire-systems-llc/) — based in Sanger, TX; fire alarm; registrations: ACR-2577936; phone: 940-435-8403
- [PeteMar Technology](https://plumbregistry.com/fire-protection/providers/petemar-technology/) — based in Frisco, TX; fire alarm; registrations: ACR-2310534; phone: 469-682-5146
- [Reforged & Refined LLC](https://plumbregistry.com/fire-protection/providers/reforged-refined-llc/) — based in Krum, TX; fire alarm; registrations: ACR-3464838; phone: 801-834-4847
- [Safe Life Fire Protection LLC](https://plumbregistry.com/fire-protection/providers/safe-life-fire-protection-llc/) — based in Ponder, TX; fire alarm, fire extinguisher and fire sprinkler; registrations: ACR-2531871, ECR-2513532, SCR-G-2506262; phone: 817-586-3800
- [Shambaugh & Son LP](https://plumbregistry.com/fire-protection/providers/shambaugh-son-lp/) — based in San Antonio, TX; fire alarm, fire extinguisher and fire sprinkler; registrations: ACR-2226, ECR-2207061, SCR-G-0558; phone: 830-708-4978
- [SolTyr Technologies](https://plumbregistry.com/fire-protection/providers/soltyr-technologies/) — based in Lewisville, TX; fire alarm; registrations: ACR-3270508; phone: 972-571-2622
- [Vector Security, Inc.](https://plumbregistry.com/fire-protection/providers/vector-security-inc/) — based in Warrendale, PA; fire alarm; registrations: ACR-1768; phone: 724-741-2221

## FAQ

**How do I check that a fire alarm company in Denton is licensed?**

Search the company name or registration number in the Texas State Fire Marshal's Office public lookup (https://appscenter.tdi.texas.gov/reports/p/sfmo). Every company listed here shows its registration numbers and expiration dates, re-checked against state records on each data refresh.

**What license does a fire alarm company need in Texas?**

Companies doing this work must hold a Texas SFMO Fire Alarm Certificate of Registration (ACR). Texas requires a State Fire Marshal's Office certificate of registration for each type of work: fire alarm (ACR), fire extinguisher (ECR) and fire sprinkler (SCR). Individual technicians must also hold SFMO licenses.

**Does a company need to be located in Denton to work there?**

No. Texas registrations are statewide, so companies based elsewhere in Denton County or across Texas can work in Denton. Confirm the service area with the company.

_Source: Texas Department of Insurance, State Fire Marshal's Office licensee records (https://appscenter.tdi.texas.gov/reports/p/sfmo), retrieved October 24, 2026. Published by Plumb Registry._