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A. One- and Two-Family Dwellings. Section R313.2 of the International Residential Code is adopted and modified as follows. An approved automatic fire sprinkler system shall be installed in one- and two-family dwellings that meet any of the following:

1. Fire flow calculation area exceeding 5,000 square feet;

2. Located on an unprotected parcel;

3. Located in Fire District 25 or Fire District 26;

4. Any structure containing three or more townhouse units;

5. Located on Raft Island, Herron Island, Harstine Island, Tanglewood Island, or Ketron Island; or

6. Less than a 5-foot setback to a property line.

B. Accessory Structures. An approved automatic fire sprinkler system shall be installed in new accessory structures with a fire flow calculation area exceeding 5,000 square feet.

C. Commercial. An approved automatic fire sprinkler system shall be installed in new commercial buildings that meet any of the following:

1. Located in Fire District 25 or Fire District 26;

2. Located on an unprotected parcel and not meeting one of the criteria found in PCC 17C.60.160;

3. Installation of fire sprinklers were a condition of a land use application; or

4. Located on Raft Island, Herron Island, Harstine Island, Tanglewood Island, or Ketron Island.

D. Special Provisions.

1. One-and Two-Family Dwellings with a fire flow calculation area of 5,000 square feet or more shall comply with Table 17C.60-6.

2. Parcels with three dwelling units shall have an approved fire sprinkler system installed and meet PCC 17C.60.160.

a. Exception: Legally existing mobile home parks.

3. Parcels with four or more dwelling units shall have an approved fire sprinkler system installed and meet PCC 17C.60.160.D.1.a.

a. Exception: Legally existing mobile home parks.

E. Existing Buildings. When a fire sprinkler system is required by subsections A through D or Table 17C.60.160-6, the following provisions apply to existing buildings:

1. Effective January 1, 2017, a one-time alteration, including additional square footage, replacement square footage, and/or remodel square footage of up to 500 square feet, is allowed before sprinklers are required by subsections A and B or Table 17C.60.160-6.

2. For a building that meets subsections A through D or Table 17C.60.160-6 and does not meet subsection E.1, sprinkler protection shall be required as follows:

a. The kitchen(s) shall be provided with either a kitchen hood suppression system or a kitchen sprinkler head.

b. If an addition is proposed, the addition shall be provided with sprinkler protection if it is not exempt from sprinkler protection under the applicable NFPA 13 standard. If the addition is exempt from sprinkler protection under the applicable NPFA 13 standard, a single head shall be provided at the transition between the addition and the existing building.

c. Any area being remodeled where sheetrock is being added/removed/relocated shall be provided with sprinkler protection.

3. Sprinkler systems required by subsection D.2 or D.3 shall be required in the building that is being permitted. Installation of fire sprinkler systems in dwellings that are not in for a building permit are not required by this Section.

4. A substantial alteration requires installation of the approved fire sprinkler system in accordance with the applicable NPFA 13 standard.

(Ord. 2021-46s § 1, 2021; Ord. 2016-85s § 1 (part), 2016)