If adding a new addition, will it require that my smoke and carbon monoxide detectors become hard wired throughout my house?

[Steve Johnson]

I live in Massachusetts, my existing house has battery smoke detectors and carbon monoxide detectors. I'm considering adding a two car garage, with a room above and attaching to my house. If this is done, do I now need smoke detectors in every bathroom and also additional one's on every level hard wired. Also will the carbon monoxide detectors need to be hard wired and also will I need to hard wire heat dectors into the garage?

[Anonymous]

Residential Code section R314.3.1, States when an addition other than a deck or porch is constructed on an existing dwelling, requiring a building permit, the building must be brought into conformance with the smoke alarm requirements for new buildings.