
Carbon monoxide (CO) is odorless, colorless, and lethal in minutes. In dense New York City housing where boilers, fireplaces, and attached garages are common, one faulty appliance can threaten an entire brownstone or co-op floor. CountBricks equips residential owners, remodelers, and GC’s with the knowledge and AI tools needed to specify, price, and install the right carbon monoxide detector NYC regulations demand.
Local mandates. NYC Building Code requires CO detection within 15 feet of every sleeping area and on each story with fuel-burning equipment.
Device type. Combination smoke/CO alarms are accepted, but must bear the latest UL 2034 standard.
Power supply. Hard-wired with battery back-up is preferred in gut renovations; sealed 10-year lithium battery units are permitted in finished spaces.
Replacement cycle. Detectors must be replaced every 5-7 years or per manufacturer instructions.
Every townhouse or apartment is unique, which is why CountBricks built AI estimating that speaks live with you on-site. During a short voice conversation our platform generates a line-item budget reflecting real-time material pricing and NYC labor rates. Typical factors include:
• Unit price: $28–$185 depending on smart features and dual-sensor capability
• Wiring and junction boxes: $85–$150 per location when walls are open
• Surface-mount raceway solutions: $60–$90 per run in finished spaces
• Permit administration: $150–$350 when bundled with broader renovation permits
• Device programming & testing: $30–$55 per unit
Pro Tip: Bundle detector installation with other electrical scopes to leverage economies of scale—CountBricks AI automatically applies multi-location discounts in your estimate.
1. Start a live voice session on the CountBricks mobile app.
2. Describe your residence, existing wiring, and finish conditions.
3. Our AI cross-checks NYC code, current Home Center pricing, and union wage sheets.
4. Within seconds you receive a shareable PDF estimate plus a branded proposal ready to send to your client or condo board.
5. Need drawings? Upload PDFs and CountBricks performs an AI blueprint takeoff, locating every required CO alarm per code.
1. Verify gas appliances and flue paths to determine detector quantity.
2. Shut power at panel; confirm circuit with non-contact tester.
3. Mount old-work box or surface plate at eye-level—never behind drapery.
4. Pull 14/3 NM-B or MC cable from nearest feed; staple within 8 inches of the box.
5. Land conductors, attach battery back-up, and secure the detector base.
6. Restore power, press “Test/Reset,” and log result in the CountBricks punch-list app.
• Standard: Low upfront cost, basic audible alarm; ideal for rental compliance.
• Smart Wi-Fi: Push notifications, self-testing, integration with Google Home or Alexa; perfect for high-end brownstone renovations.
• Hard-wired networked: Interconnected alarms through signal wire; suits multi-family retrofits where simultaneous warning is critical.
CountBricks analytics show a 37 percent reduction in emergency service calls for homes upgraded to smart CO detectors. Our platform can model long-term savings by pairing detector data with boiler maintenance schedules—convincing even budget-tight co-op boards to approve the spend.
• Installing too close to kitchens: Steam can trigger nuisance alarms—mount at least 10 feet away.
• Forgetting the basement: NYC code treats cellar mechanical rooms as habitable stories for CO detection.
• Mixing device brands: Interconnection may fail—CountBricks recommends using a single manufacturer portfolio.
• Not dating devices: Use a fine-point marker to write the install date on the side; CountBricks warranty tracker reminds you when replacement is due.
Beyond carbon monoxide, our AI generates estimates for smoke alarms, GFCI upgrades, and whole-home surge protection. Explore more at CountBricks.com/services or browse past townhouse retrofits at CountBricks.com/portfolio.
Schedule a free voice consultation today. In under five minutes you’ll know exactly how many carbon monoxide detectors your NYC residence needs and what it will cost—down to the last brick.

A four-story 1890s brownstone recently gut-renovated its garden and parlor levels but left the upper floors intact. The owner needed carbon monoxide detector NYC compliance across mixed old-work and new-work conditions.
• Live voice call documented 12 potential install points in 7 minutes
• AI blueprint takeoff auto-placed detectors on the renovation plans, flagging two missing hallway locations overlooked by the architect
• Instant estimate: $2,480 material & labor, including smart Wi-Fi models on renovated floors and sealed battery units upstairs
• Proposal conversion: Owner approved within 24 hours thanks to CountBricks’ branded PDF and lifecycle ROI chart
1. Electrical team used CountBricks task list to pre-fabricate wiring harnesses, cutting install time by 18 percent.
2. QR labels printed from the platform were affixed to each detector; scanning them logs future tests in the CountBricks maintenance dashboard.
3. Final inspection passed on the first visit—no punch-list items—saving the GC an estimated $600 in re-site fees.
• Hybrid detector strategy balances cost and convenience for partial renovations.
• Early AI takeoff prevents code gaps that often surface only at inspection.
• Digital lifecycle tracking adds measurable value for resale disclosures.
Whether you manage a pre-war co-op or a new modular townhouse, CountBricks delivers precise, voice-driven estimates and flawless execution support. Visit CountBricks.com/consultation to book your free call and see how quickly we can bring your project to NYC carbon monoxide compliance—backed by data, not guesswork.