Water Main & Underground Utility Work Cost Guide — Nashua, NH

Verified 2025 pricing for water main & underground utility work services in Nashua. Updated quarterly from local contractor data.

Service Cost Ranges

Service	Low	Average	High	Unit
Water Main Line Replacement	$3,900	$9,100	$19,500	per project
Water Service Line Installation	$2,600	$6,500	$15,600	per project

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Older housing stock (pre-1968) increases complexity and materials cost

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