Pricing depends on the scope of work. Battery-only replacements are per-alarm and can be quoted over the phone — we carry Kidde, First Alert, and BRK units on the truck. Hardwired interconnected upgrades depend on the number of alarms, your home’s wiring access (attic, crawl space, finished ceilings), and the layout. A standard 3-4 bedroom home typically takes 2-4 hours. We provide a written estimate after an on-site assessment so you see the full cost before we start. No trip charge in our primary service area.

Every 10 years, per both the manufacturer and NFPA (National Fire Protection Association) guidelines. The manufacture date is stamped on the back of the unit — not the date you installed it, but the date it was made. After 10 years, the sensors degrade regardless of whether the alarm still chirps when you press the test button. If your alarms are yellowed, you can’t read the date, or you simply don’t remember when they went in, it’s time. We check every unit during an assessment.

Battery-only alarms run on a battery and operate independently — each one is on its own. If a downstairs alarm triggers, the upstairs bedrooms hear nothing. Hardwired alarms connect to a dedicated household circuit and have a battery backup for power outages. When they’re interconnected, triggering one alarm sounds all alarms throughout the house simultaneously. That interconnection is what saves lives in the middle of the night when a fire starts two floors away from your bedroom.

Yes — for new construction and major renovations, Virginia code requires hardwired interconnected smoke alarms. Existing homes may be grandfathered under the code that was in effect when they were built, but that doesn’t mean standalone battery alarms are adequate for your family’s safety. If you’re selling the home, the buyer’s inspector will flag non-interconnected alarms. We recommend upgrading regardless of whether code technically requires it — the cost is modest and the safety improvement is significant.

If your home has a fuel-burning appliance — gas furnace, gas water heater, gas stove, fireplace — or an attached garage, Virginia code requires carbon monoxide detectors on every level of the dwelling. Many homes have smoke alarms but no CO detectors, or have standalone CO detectors that aren’t interconnected with the smoke alarm system. We install combination smoke/CO units that cover both requirements in one device and tie into the interconnected system.

Two likely causes. First, the alarm may be too close to the kitchen — code requires a minimum of 10 feet from cooking appliances, and many older installs violate this. Second, the alarm may be past its 10-year life and oversensitive as the sensor degrades. Modern photoelectric alarms have significantly better nuisance-alarm resistance than older ionization models. We relocate the alarm to a code-compliant position and replace it with a current-generation unit that won’t cry wolf every time you use the oven.

For straightforward battery-only replacements, no permit is needed. For hardwired interconnected systems that involve running new wiring or adding a dedicated circuit, Fairfax County typically requires an electrical permit. The permit ensures the work is inspected and documented — important for home insurance and resale. We pull the permit and handle the inspection if one is required. Most simple hardwired replacements on existing wiring don’t trigger a permit, but new circuit work does.

Yes — this is one of the most common calls we get. We assess the house for Virginia fire code compliance, identify what’s missing or expired, install the needed alarms, and provide written documentation for your listing agent. Getting compliant before listing avoids last-minute inspection surprises and repair-credit negotiations. We can usually complete a full-house assessment and install in a single visit, and we prioritize scheduling for sellers with closing deadlines.