Pricing

Before you look at a single number, we want you to know who you're calling.

GSMS has proudly operated as a family-owned business since 1987, evolving from a single truck managed by Mark Downing to a dedicated team led by his sons, Zak and Jack. Our company remains entirely locally owned and managed. When you reach out to us, you're not contacting an impersonal call center; instead, you're speaking with your neighbors who are fully committed to serving the families and businesses of New Hampshire.

we love local

Being family-owned means more to us than just who signs the checks. Every month, GSMS puts our name and our resources behind a local cause, from youth sports teams to community fundraisers right here in southern New Hampshire. It's part of how we measure success: not just the jobs we complete, but the neighborhoods we help take care of along the way.

why our pricing looks the way it does

Honesty matters more to us than a clean-looking number. Every home and system is different, so we publish honest ranges rather than a single price that rarely fits everyone. A GSMS Specialist confirms your exact price in writing before any work begins, so there are never any surprises once we're in your home.

the GSMS difference

see pricing for your project

Every job is different, so we've split pricing out by service. Pick the one that matches what's going on at your house.

Furnaces, heat pumps, AC, ductless systems, and IAQ upgrades.

Water heaters, drain cleaning, repairs, and fixture installs.