The Bret Tarver Sprinkler Ordinance
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903.2 Bret Tarver Sprinkler Ordinance. (Effective June 17, 2002, Revised December 13, 2002, January 12, 2005, May 3, 2006, Ordinance G-4821 August 30, 2006, Ordinance G-4859 February 17, 2007, Ordinance G-5082 January 30, 2008)

An automatic sprinkler system shall be installed throughout all levels of all new Group A, B, E, F, H, I, M, R-1, R-2, R-4, and S occupancies of more than zero square feet and throughout all R-3 and U occupancies of more than 5,000 square feet.

The calculated area of R-3 occupancies shall include all livable space and the area of any attached garage and carports or areas located under living spaces.
Automatic sprinkler systems shall be installed in accordance with NFPA 13 for Group A, B, E, F, H, I, M, R-1, R-2, R-4 and S occupancies. NFPA 13R for residential occupancies up to and including four stories in height, in groups R-1, R-2, R-4 occupancies and NFPA 13D for one- and two-family dwellings and mobile homes in group R-3 and R-4 occupancies with 6-10 licensed beds.
Exceptions to or reductions in code requirements are not allowed for the installation of residential sprinkler systems installed in accordance with NFPA 13R and NFPA 13D unless specifically allowed by the International Building Code.

EXCEPTIONS:
1. Detached gazebos, temporary tents and ramadas for residential and public use.
2. Independent buildings such as restrooms or snack shops 600 square feet or less that are of non-combustible construction associated with golf courses, parks, and similar uses.
3. Guardhouses that are less than 300 square feet in size used to control access to or within residential and/or commercial developments of combustible construction or 600 square feet or less that are of non-combustible construction.
4. Detached equipment or storage buildings for commercial use not exceeding 300 square feet.
5. Detached non-combustible canopies used exclusively for automotive, motor fuel-dispensing stations not exceeding 5,000 square feet, or detached non-combustible carports or parking canopies regardless of size.
6. Manufactured (Mobile) homes built on a permanent chassis designed, built and occupied as a dwelling unit and recreational vehicles that were not site built and are portable in nature.
7. Factory built buildings utilized as temporary office buildings similar to real estate leasing offices and construction offices.

903.2.1 Retrofit. Existing buildings are required to comply with the provisions of

903.2.1 when any of the following apply:

903.2.1.2 Retrofit in R-3 occupancies. One or more additions within any 3 year period are made to an R-3 occupancy and comply with all of the following:
1. The aggregate of the additions exceeds 50% of the square footage of the house as of June 17, 2002.
2. The new total area of the building is greater than 5,000 square feet.
903.2.1.3 Retrofit in all other occupancies.
1. Building additions other than R-3 that equal 50% or more of the existing building floor area, or exceed 10,000 square feet; whichever is less.
2. Two or more building permits related to increased square footage are issued over any three consecutive years where:
a. The aggregate of the additions exceeds 50% of the square footage of the building as of June 17, 2002.
b. The new total area of the building is greater than 10,000 square feet.
903.2.1.3.1 Building RemodelsAn automatic fire sprinkler system shall be installed when 50 percent or more of the roof assembly is replaced or repaired due to fire damage or structure failure or, when the removal of existing fire rated assemblies’ results in an increase of the original basic allowable area.
903.2.1.3.2 Change of Occupancy Within Hazard Level 1. An automatic fire sprinkler system shall be installed when a building, regardless of the building area, undergoes a change of occupancy within hazard level 1.
903.2.1.3.3 Change of Occupancy Over 2,500 Square Feet.An automatic fire sprinkler system shall be installed in any building 2,500 square feet or greater that undergoes a change of occupancy.
903.2.1.3.4 Change of Occupancy Under 2,500 Square Feet. An automatic fire sprinkler system shall be installed in any building under 2,500 square feet that undergoes a change of occupancy to a higher hazard level or changes occupancy within hazard level 1 as defined by Table 903.2.1.3.
Table 903.2.1.3

http://phoenix.gov/FIRE/sprinkle.html