On the Mark Plumbing, Heating & Cooling
HVAC in Marshfield, MA · ★ 5.0 Google rating
Google rating as of October 2026. How ratings work here
- Address
- 37 Acorn St, Marshfield, MA 02050
- Phone
- (781) 733-0574
- Website
- https://onthemarkphc.com ↗
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About On the Mark Plumbing, Heating & Cooling
On the Mark Plumbing, Heating & Cooling is a HVAC contractor based in Marshfield, Plymouth County, Massachusetts, at 37 Acorn St, Marshfield, MA 02050. It has a Google rating of 5.0 out of 5. Its website is linked above. A listing here is not a license or insurance check, so verify both directly before hiring.
Service area
Based in Marshfield, On the Mark Plumbing, Heating & Cooling is within a short drive of Duxbury (3 mi), Pembroke (5 mi), Kingston (7 mi), Norwell (8 mi), Hanover (8 mi) and Hanson (8 mi). Most Massachusetts hvac contractors work a 25-mile radius, so homeowners in those towns can reasonably ask for a quote.
Hiring a HVAC contractor in Marshfield
Massachusetts requires a permit for any HVAC system replacement, reviewed by the Marshfield building department. A heat pump retrofit also needs a separate electrical permit for the new condenser circuits. Marshfield's many flood-zone properties near Brant Rock, Green Harbor, and the salt marsh often require outdoor equipment to be elevated above the base flood level, and coastal velocity zones can add further siting rules. Reputable contractors check flood maps, plan unit elevation and placement, and handle the building and electrical permits as part of the project.
Marshfield costs run a bit above average because of coastal equipment needs and flood-zone elevation work. A full whole-home heat pump retrofit generally runs $19,000–$31,000 before rebates; a single-zone ductless mini-split usually lands at $4,500–$8,000 installed; and a like-for-like oil or gas boiler replacement is typically $7,500–$13,000. Salt-air-rated condensers and coils for beachfront homes add cost, and elevating outdoor units above flood level pushes coastal jobs toward the higher end of these ranges.
Massachusetts requires a written contract and a Home Improvement Contractor registration for most residential hvac work; ask for the registration number and check it before paying a deposit.
More on permits, costs, rebates and common questions, plus every other hvac contractor serving the town, on the HVAC in Marshfield page.
Services listed
On the Mark Plumbing, Heating & Cooling is listed for 2 trades in Marshfield: HVAC and Plumbing.
Other HVAC contractors in Marshfield
See all HVAC in Marshfield.