Electrical · SOC 47-2111

Smoke / CO Detector Installation (multi-unit) cost

Electrical jobs are short on materials for simple swaps and long on troubleshooting when the box or circuit isn’t ready. For Smoke / CO Detector Installation (multi-unit) we use mid hours of 2.5 and materials around $220, then apply the same 2.0× / 2.25× / 2.5× labor markup schedule as every other Fairange job.

Smoke & CO detectors — that’s the everyday name. On Fairange it’s a published hours band (1.5/2.5/4.5) plus a materials band, run through BLS OEWS May 2025 wages for Electricians (SOC 47-2111).

Last updated from data: BLS OEWS May 2025 · PPI construction materials 2026-09

What this estimate can’t tell you. Roof pitch, an old house or code upgrades, tough access, permits, emergency or after-hours calls, and brand tier can push a real quote outside this range.
Hours (low / mid / high)
1.5 / 2.5 / 4.5
Materials band
$100 – $400
U.S. mid (before ZIP)
$413

typical 3-unit package (smoke/CO combo) — battery or hardwired interconnect on existing circuits; new circuit runs extra. National OEWS mean wage used on this page: $34.37/hr (SOC 47-2111).

How the national mid is built

Before you enter a ZIP we use the U.S. OEWS mean wage for Electricians (SOC 47-2111): $34.37/hr (BLS OEWS May 2025). Mid estimate ≈ 2.5 hours × $34.37 × 2.25× markup + materials mid $220 (with a small regional materials factor). Low uses p10 wages × 2.0×; high uses p90 × 2.5×. National planning band: $162 – $413 – $987.

Full algebra: methodology. Markup schedule is Fairange’s published assumption, not a BLS figure.

Materials band (cited retail)

Published materials low / mid / high: $100 / $220 / $400 (typical 3-unit package (smoke/CO combo) — battery or hardwired interconnect on existing circuits; new circuit runs extra). Shelf checks that shaped the band (see also DATA_SOURCES):

~3 units: Kidde AA combo ~$49.97 · 10-year battery ~$59.97 · hardwired ~$64.97–$69.97 · First Alert SC5 smart ~$120.99–$128.63 (Kidde, First Alert)

What usually moves the number

What’s in the planning band

Labor for a like-for-like device or fixture on an existing circuit, basic testing, and the parts band above.

Ask about before you sign

Run this job on your ZIP Electrical trade hub

Related jobs: Outlet / Receptacle Installation · Ceiling Fan Installation · New Branch Circuit Installation · Video Doorbell Installation.

Also: calculator · methodology · city guides · all job guides · DATA_SOURCES.

Smoke / CO Detector Installation (multi-unit) FAQ

How much does smoke / co detector installation (multi-unit) cost?

National mid planning estimate is about $413 before you enter a ZIP — labor from BLS OEWS May 2025 Electricians (SOC 47-2111, national mean $34.37/hr) × published hours, plus materials. Local OEWS wages move the band once you type a ZIP.

What hours, materials, and markup do you assume?

Hours 1.5 / 2.5 / 4.5. Materials band $100 / $220 / $400 from cited Home Depot (or similar) retail listings documented in DATA_SOURCES — not lead-gen marketplace averages. Example shelf checks: ~3 units: Kidde AA combo ~$49.97 · 10-year battery ~$59.97 · hardwired ~$64.97–$69.97 · First Alert SC5 smart ~$120.99–$128.63 (Kidde, First Alert). Labor markup 2.0× / 2.25× / 2.5× (Fairange methodology).

Is this a bid?

No. It’s an educational planning range. Collect at least three written scopes from licensed pros and compare exclusions — permits, haul-away, patching, and code upgrades.

Any rebates or tax credits?

Some fire departments or insurers discount monitored alarms; check local programs. Not a federal energy credit.

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