# Fire alarm companies in Denison, Texas

2 fire alarm companies with an active Texas SFMO Fire Alarm Certificate of Registration (ACR) have a location in Denison, Texas, as of October 24, 2026. 1 more are elsewhere in Grayson County.

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

## Located in Denison

- [Four Feathers Alarm LLC](https://plumbregistry.com/fire-protection/providers/four-feathers-alarm-llc/) — based in Denison, TX; fire alarm, fire extinguisher and fire sprinkler; registrations: ACR-3336, ECR-2201181, HCR-3343145, SCR-G-2197356; phone: 903-786-0088
- [Grayson Pro-Tech, Inc.](https://plumbregistry.com/fire-protection/providers/grayson-pro-tech-inc/) — based in Denison, TX; fire alarm; registrations: ACR-1750534; phone: 903-463-7767

## Elsewhere in Grayson County

- [SSD Syst & SSD Alarm](https://plumbregistry.com/fire-protection/providers/ssd-syst-ssd-alarm/) — based in Arlington, TX; fire alarm; registrations: ACR-1750784; phone: 714-449-9900

## FAQ

**How do I check that a fire alarm company in Denison 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 Denison to work there?**

No. Texas registrations are statewide, so companies based elsewhere in Grayson County or across Texas can work in Denison. 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._