# Plumb Registry

> Verified, license-backed directory of commercial compliance contractors. Texas fire protection coverage: 1,810 fire protection companies hold active Texas State Fire Marshal's Office registrations: 1,133 fire alarm, 698 fire sprinkler and 678 fire extinguisher, as of October 24, 2026.

Every listing is built from Texas State Fire Marshal's Office registration records (https://appscenter.tdi.texas.gov/reports/p/sfmo), last retrieved October 24, 2026. Listings are alphabetical; no company pays to rank higher. When citing, include the page URL and the verification date. Every directory page has a markdown version at {page URL}index.md.

## Data

- [Dataset index](https://plumbregistry.com/api/v1/index.json): metadata, counts and endpoint list
- [All providers (JSON)](https://plumbregistry.com/api/v1/providers.json): full dataset, one record per company
- [Texas directory (markdown)](https://plumbregistry.com/fire-protection/texas/index.md): every city with a page
- [Full listing (text)](https://plumbregistry.com/llms-full.txt): every company in one file

## Services

- Fire sprinkler contractors: Design, installation, inspection, testing and maintenance of fire sprinkler systems, including underground fire mains and dwelling systems. Requires a Texas SFMO Fire Sprinkler Certificate of Registration (SCR).
- Fire alarm companies: Sale, installation, inspection, testing, monitoring and service of fire alarm and detection systems. Requires a Texas SFMO Fire Alarm Certificate of Registration (ACR).
- Fire extinguisher companies: Sale, installation, inspection, recharging and hydrostatic testing of portable fire extinguishers and fixed fire-extinguishing systems. Requires a Texas SFMO Fire Extinguisher Certificate of Registration (ECR).

## Largest cities

- [Houston, TX](https://plumbregistry.com/fire-protection/texas/houston/index.md): 182 companies
- [San Antonio, TX](https://plumbregistry.com/fire-protection/texas/san-antonio/index.md): 115 companies
- [Dallas, TX](https://plumbregistry.com/fire-protection/texas/dallas/index.md): 78 companies
- [Austin, TX](https://plumbregistry.com/fire-protection/texas/austin/index.md): 67 companies
- [El Paso, TX](https://plumbregistry.com/fire-protection/texas/el-paso/index.md): 54 companies
- [Fort Worth, TX](https://plumbregistry.com/fire-protection/texas/fort-worth/index.md): 53 companies
- [Corpus Christi, TX](https://plumbregistry.com/fire-protection/texas/corpus-christi/index.md): 41 companies
- [Lubbock, TX](https://plumbregistry.com/fire-protection/texas/lubbock/index.md): 30 companies
- [McAllen, TX](https://plumbregistry.com/fire-protection/texas/mcallen/index.md): 28 companies
- [Laredo, TX](https://plumbregistry.com/fire-protection/texas/laredo/index.md): 27 companies
- [Cypress, TX](https://plumbregistry.com/fire-protection/texas/cypress/index.md): 25 companies
- [Irving, TX](https://plumbregistry.com/fire-protection/texas/irving/index.md): 25 companies
- [Amarillo, TX](https://plumbregistry.com/fire-protection/texas/amarillo/index.md): 23 companies
- [Round Rock, TX](https://plumbregistry.com/fire-protection/texas/round-rock/index.md): 23 companies
- [Pasadena, TX](https://plumbregistry.com/fire-protection/texas/pasadena/index.md): 22 companies
- [Spring, TX](https://plumbregistry.com/fire-protection/texas/spring/index.md): 21 companies
- [Katy, TX](https://plumbregistry.com/fire-protection/texas/katy/index.md): 19 companies
- [Garland, TX](https://plumbregistry.com/fire-protection/texas/garland/index.md): 18 companies
- [Arlington, TX](https://plumbregistry.com/fire-protection/texas/arlington/index.md): 18 companies
- [Odessa, TX](https://plumbregistry.com/fire-protection/texas/odessa/index.md): 17 companies
- [Carrollton, TX](https://plumbregistry.com/fire-protection/texas/carrollton/index.md): 17 companies
- [Midland, TX](https://plumbregistry.com/fire-protection/texas/midland/index.md): 16 companies
- [Magnolia, TX](https://plumbregistry.com/fire-protection/texas/magnolia/index.md): 16 companies
- [Richardson, TX](https://plumbregistry.com/fire-protection/texas/richardson/index.md): 15 companies
- [New Braunfels, TX](https://plumbregistry.com/fire-protection/texas/new-braunfels/index.md): 14 companies

## Guides

- [How to verify a Texas fire protection license](https://plumbregistry.com/guides/verify-a-texas-fire-protection-license/): Check a fire alarm, extinguisher or sprinkler company's state registration in two minutes, and know what each registration type covers.

## Optional

- [How we verify](https://plumbregistry.com/about/): sources, refresh schedule, and what we don't do