| Quick facts | Answer |
|---|---|
| Cost range | $70 to $150 per alarm; $110 to $410+ hardwired |
| Time | About 2.3 to 5 hours; labor often 1 to 2 hours per unit |
| Who's qualified | Ask for proof of insurance, relevant certifications (e.g., ASE for auto repair), and any license your state or city requires. |
Round Rock, TX: what's different here
Round Rock sits in Williamson County, about 19 miles and roughly 20 minutes north of Austin via I-35 North. The climate is hot and humid, and summer conditions can matter for attic or ceiling electrical work during smoke detector wiring. A local pro familiar with the area can plan around the heat and the I-35 corridor.
Who can legally do smoke detector wiring in Round Rock?
Texas law requires anyone performing electrical work to be licensed, and fire alarm or fire detection devices cannot be installed, serviced, or maintained without the required registration certificate. Texas statute defines electrical contracting to include signaling circuits, including fire alarm circuits. Ask the pro for proof of license and insurance before work starts.
What does hardwired smoke detector wiring cost per unit?
A new hardwired smoke detector installation with substantial electrical work runs about $110 to $410 or more per unit. If new wiring is needed, HomeGuide says running electrical wiring can add about $0.10 to $4.00 per linear foot before labor. Simple residential installs average closer to $70 to $150 per alarm.
How long does smoke detector wiring take?
A June 2026 HomeAdvisor pricing study cited about 2.3 to 5 hours of work for typical smoke detector installation. HomeGuide says labor often runs about 1 to 2 hours per unit. Get a written time estimate in your quote.
Do Texas rules limit which detectors can be used?
Texas statute allows single-station or multiple-station detectors for certain installations if they do not connect to a control panel or outside alarm, do not transmit a signal off premises, and use no more than 120 volts. Those installations must comply with NFPA 72. Confirm your setup meets these rules.
What to do next
- Decide whether you need a simple swap or a new hardwired run, since pricing differs ($70-$150 vs. $110-$410+ per unit).
- Ask the pro to show their Texas electrician license and any fire alarm registration certificate required by the state.
- Request a written quote listing hourly labor (electricians commonly charge $50 to $130 per hour) and any per-foot wiring cost.
- Confirm the planned detectors meet Texas limits: no control panel connection, no off-premises signal, 120 volts max, and NFPA 72 compliance.
- Call (737) 367-2100 or email [email protected] for a free quote from a licensed, insured electrician.
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