Dear customer. We’re happy to give you the estimate to — Run new 14/3 romex cable to power (6) new smoke detector, approximately 60ft total length — Supply and Install (6) smoke and CO2 combination detectors with 10 years lithium battery backup — Drywall cutting is required and will be rough patch, painting by others Thank you for choosing us and feel free to reach out for more details **********Jason - Kings Electric & AC**********