When are sprinklers required in a single-family dwelling (SFD)?

Sprinklers in a single-family dwelling are primarily determined by local building codes and bylaws, which can vary significantly from one jurisdiction to another. Local authorities have the discretion to implement specific building regulations, including the requirement for sprinkler systems based on the unique safety needs of the community and the characteristics of the buildings being constructed.

In many areas, sprinkler systems might be mandated in certain types of homes or under specific conditions, but this is not a uniform requirement across all regions or for all single-family dwellings. Therefore, the requirement for sprinklers can vary based on local legislation, which is why it is vital to check the local bylaws that govern residential construction.

The other options suggest universal conditions based on size or height without considering local guidelines, which does not reflect the actual practice and flexibility that different municipalities have regarding fire safety and building design. Thus, the correct understanding of when sprinklers are necessary in a home is tied directly to local regulations.