Smoke & CO Requirements

If you have received this link as part of your permit issuance, your building project must meet the Smoke & Carbon Alarm requirements listed below.  Please call if you have questions 651-638-2050.

Updated to the 2020 Minnesota Residential Code

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Smoke Alarms

To download a copy of the code information, click here.

Required Locations

R314.3 Location. Smoke alarms shall be installed in the following locations:

  1. In each sleeping room.
  2. Outside each separate sleeping area in the immediate vicinity of the bedrooms.
  3. On each additional story of the dwelling, including basements and habitable attics and not including crawl spaces and uninhabitable attics.
  4. Smoke alarms shall be installed not less than 3 feet horizontally from the door or opening of a bathroom that contains a bathtub or shower unless this would prevent placement of a smoke alarm required by this section.
  5. Smoke alarms shall not be installed near cooking appliance locations unless this would prevent placement of a smoke alarm in a location required as noted above

Examples/Exceptions

Section R314.3.1 R314.2.2 Alterations, repairs and additions.

An individual dwelling unit shall be equipped with smoke alarms located as required for new dwellings when:

Examples are: 

  1. Alterations, repairs (including installation o replacement of windows or doors), or additions requiring a building permit occur; or
  2. One or more sleeping rooms are added or created in an existing dwelling
  3. Interior remodel including basement or bathroom finish

Exceptions:

  1. Work involving the exterior surfaces of dwellings, such as the replacement of roofing or siding, or the addition of a an open porch or deck, or chimney repairs.
  2. Installation, alteration, or repairs of plumbing, electrical, or mechanical systems.

Interconnection Requirements

Interconnection of smoke alarms in existing areas shall not be required where alterations or repairs do not result in removal of interior wall or ceiling finishes exposing the structure.

Effective Dates

Effective Dates:
1.    January 1, 2007 – newly constructed single family and multifamily dwellings
2.    August 1, 2008 – existing single family homes
3.    August 1, 2009 – existing multifamily and apartment dwelling units

Carbon Monoxide Alarms

To download a copy of the code information, click here.

Required Locations

R315.3 Location. Carbon monoxide alarms shall be installed in the following locations:

  1. In dwelling units; shall be installed outside of and not more than 10 feet from each separate sleeping area or bedroom.
  2. Each level containing sleeping areas or bedrooms.
  3. Where a fuel-burning appliance is located within a bedroom or its attached bathroom, CO alarm shall be installed within the bedroom.

Examples/Exceptions

R315.2.2 Alterations, repairs, and additions.

An individual dwelling unit shall be equipped with carbon monoxide alarms located as required for new dwellings where:

  1. Alterations, repairs (including installation or replacement of windows or doors), or additions requiring a building permit occur; or
  2. One or more sleeping rooms are added or created in existing dwellings.

Exceptions:

  1. Work involving the exterior surfaces of dwellings, such as the replacement of roofing or siding, the addition of an open porch or deck, or chimney repairs.
  2. Installation, alteration, or repairs of plumbing, electrical, or mechanical systems.
     
Interconnection Requirements

Interconnection of carbon monoxide alarms in existing areas shall not be required where alterations or repairs do not result in removal of interior wall or ceiling finishes exposing the structure.

Effective Dates

Effective Dates:
1.    January 1, 2007 – newly constructed single family and multifamily dwellings
2.    August 1, 2008 – existing single family homes
3.    August 1, 2009 – existing multifamily and apartment dwelling units