Smoke Detector Pros proudly serves homeowners across St. Charles County and St. Louis County, Missouri.

St. Charles County service areas include:

• O’Fallon

• St. Peters

• St. Charles

• Wentzville

• Lake St. Louis

• Dardenne Prairie

• Cottleville

• Weldon Spring

• New Melle

St. Louis County service areas include:

• Chesterfield

• Ballwin

• Wildwood

• Creve Coeur

• Kirkwood

• Webster Groves

• Maryland Heights

• Brentwood

• Clayton

• Fenton

• and surrounding communities

Smoke Alarm & Fire Safety Services Areas

Older homes often have outdated alarms, limited alarm coverage, non-interconnected systems, or smoke detectors that are no longer dependable. We frequently help homeowners in older homes update their fire safety setup with newer smoke alarm options, replacement alarms, and recommendations for improved protection.

If your home was built years ago and you are not sure whether your smoke alarms are still appropriate, we can inspect the system and walk you through the best next step.

Smoke alarms don’t last forever. Over time, alarms can expire, fail to detect properly, chirp due to malfunction, or become unreliable because of age or poor placement. A professional smoke detector replacement service can help ensure your home has dependable protection where it matters most.

Homeowners often call us for help with:

• chirping smoke detectors

• outdated smoke alarms

• hardwired alarm replacement

• smoke/CO alarm upgrades

• battery backup alarms

• older home fire alarm upgrades

• home fire safety inspections

  Smoke Detector Pro has proudly served thousands of homeowners across the St. Louis region, earning a reputation as one of the area's most trusted residential fire protection companies. Our firefighter-owned team is committed to providing expert smoke alarm installation, carbon monoxide alarm services, fire extinguisher solutions, and comprehensive home fire safety inspections.

How often should smoke detectors be replaced?

Many smoke alarms should be replaced around the 10-year mark depending on the manufacturer, model, and condition of the alarm. If you’re unsure how old your alarms are, we can inspect them and help determine whether replacement is recommended.

Do you replace hardwired smoke detectors?

Yes. We provide hardwired smoke detector replacement and hardwired smoke alarm installation for many residential systems in St. Charles County and St. Louis County.

Do you install smoke and carbon monoxide alarms?

Yes. We help homeowners with smoke alarms, carbon monoxide alarms, and combination smoke/CO alarm replacement and installation.

Do you work on older homes?

Yes. Older homes are one of the most common situations we help with. We can inspect outdated alarms, discuss replacement options, and recommend solutions that improve fire safety coverage.

Do you only service smoke alarms?

No. In addition to smoke detector services, we also provide dryer vent cleaning, fire extinguisher service, and broader home fire safety support for homeowners.

What to Expect During Your Appointment

We believe homeowners should know exactly what to expect before scheduling a visit.

Step 1 – Schedule Your Appointment

Choose a convenient time that works for you. We'll confirm your appointment and arrive prepared with common alarm models and fire safety equipment.

Step 2 – Home Fire Safety Evaluation

We inspect your existing smoke alarms, carbon monoxide alarms, and other fire safety equipment. We also discuss any concerns you may have, such as nuisance alarms, chirping devices, or questions about newer alarm technology.

Step 3 – Clear Recommendations

If replacement or upgrades are recommended, we'll explain why in straightforward language and answer your questions. There is no pressure—our goal is to help you make informed decisions.

Step 4 – Professional Installation

When you choose to move forward, we professionally install the recommended equipment, verify operation, and make sure you understand basic testing and maintenance.

Step 5 – Peace of Mind

Before we leave, you'll know your home's fire safety equipment has been reviewed by professionals who specialize in residential fire protection.