Direct Answer
Plumbing cost-per-lead in the U.S. averages $40 to $120 across all sources in 2026. Google Ads runs $50–$150 per lead, Local Service Ads $25–$80, organic SEO drops to $5–$25 once ranked, and Facebook lead ads $30–$70. Emergency-service queries (burst pipe, water heater) cost 1.5–2x baseline.
Voice answer (≤30 words)
“Plumbing cost per lead averages forty to one hundred twenty dollars. Local Service Ads are cheapest at twenty-five to eighty.”
Track CPL by source weekly. Without source-level CPL, marketing spend can't be optimized.
Booked-job rate matters more than CPL: $80 leads at 50% booking are cheaper effectively than $40 leads at 15% booking.