Sprinkler Requirements in Northern Westchester Renovations: When NFPA 13D Triggers and What It Costs

NFPA 13D is the national standard for residential sprinkler systems, and whether it applies to your northern Westchester project depends on a stack of state code, town amendments, and scope-specific triggers that homeowners typically discover too late. This guide walks through when 13D actually triggers, what the system includes, what it costs to install, and how to plan for it before architecture is locked.