(301) 927-7300

Most Trusted Fire Protection Company in Washington DC, Maryland and Virginia

Proudly Serving Commercial Property and Facility Managers Since 2004

Located just north of Washington DC, Castle Sprinkler and Alarm specializes in a full range of fire protection services. As one of the most reputable and trusted fire protection companies serving the Northern Virginia, Washington DC, and Maryland areas, we work diligently to meet the best interests of our customers. Most importantly, we ensure life safety by operating strictly through fire code compliance.


Our Fire Protection Services

sprinkler systems

Inspections & Testing

fire alarms

Maintenance & Repair


Emergency Services

fire extinguishers

Tenant Improvements

new construction

New Construction

Industries We Serve

High Rise Apartment Building Requiring Fire Protection Services


Stove counter in a modern restaurant kitchen


Office Building Fire Protection Systems

Office Buildings

other industries

Additional Industries

Get Your Free Fire Protection Quote

contact Castle Today

Life Safety Is Our Priority

We help keep you, your building, and all of its occupants safe.

As your friend in fire protection, we prioritize your life safety. That’s why we take what we do very seriously. From providing thorough inspections to offering 24/7, 365 availability for all of our clients, we give you everything you need in a fire protection company. We invite you to explore our website to learn what Castle Sprinkler and Alarm can do for you. As always, you are welcome to call us directly for questions and information.


The Castle Sprinkler and Alarm Difference

Castle is one of the most trusted fire protection companies serving Maryland, Washington D.C., and Northern Virginia. When you work with Castle, you should expect: