Top 7 HVAC companies in Bristol, Massachusetts

Bristol County contains more than 565,000 residents across many towns that share a heating-dominant climate. Public listing data supplied the only evidence for ranking HVAC service providers. The shortlist below reflects Bayesian-adjusted star ratings rather than raw scores alone.

The shortlist

The ranking applies a Bayesian adjustment that pulls every raw star rating toward the national mean of 4.764. A public website and published 24/7 availability serve as tie-breakers when scores are close. This is a shortlist built from public listing data, not a review of work performed.

Cornerstone HVAC

Cornerstone HVAC operates from 50 Chipaway Rd, East Freetown, MA 02717 as a general contractor that lists 24/7 availability. Its 42 reviews produced a raw 5.0 that the model adjusted downward to 4.902 because the volume remains moderate. The firm lists the phone number (774) 400-6766. These figures cannot reveal whether every job met code or whether callbacks occurred after the review window.

Scott's Oil Inc

Scott's Oil Inc lists its address as 710 Main St, Dighton, MA 02715 and maintains a public website plus round-the-clock service. Twenty-eight reviews at a raw 5.0 yielded an adjusted rating of 4.878. Reach the company at (508) 689-8239. The modest review count keeps the score from standing fully on its own.

JAW Service Contractors

JAW Service Contractors sits at 1400 N Main St, Fall River, MA 02720 and advertises 24/7 coverage through its general-contractor listing. Twenty-one reviews produced a raw 5.0 that adjusted to 4.861. Call (339) 499-8733 to inquire. Limited observations leave open questions about performance on complex change-outs.

Prime Build & Comfort

Prime Build & Comfort works from 21 Willard Ave, Whitman, MA 02382 and holds a general-contractor listing without published 24/7 hours. Its 23 reviews at raw 5.0 adjusted to 4.866. The contact number is (774) 417-0596. The absence of round-the-clock status removes one tie-breaker that higher-ranked firms received.

Forge Mechanical LLC

Forge Mechanical LLC lists 217 Centre Ave, Abington, MA 02351 and offers 24/7 service under a general-contractor category. Fourteen reviews at raw 5.0 moved to 4.839 after adjustment. The listed phone is (781) 660-3792. Smaller sample size means wider uncertainty around long-term reliability.

SS Service Corp

SS Service Corp operates at 450 Richmond St, Raynham, MA 02767 without 24/7 listing. Forty-five reviews produced a raw 4.5 that the model lifted slightly to 4.606. Contact the firm at (508) 822-2100. The larger review count gives this score more stability than those with fewer observations.

BARNETT HVAC

BARNETT HVAC lists 15 Ridge Hill Rd, Assonet, MA 02702 and advertises 24/7 availability. Thirty-one reviews at raw 4.4 adjusted upward to 4.579. The phone number is (508) 863-0625. Numbers alone cannot show how the firm handles peak winter calls or warranty claims.

How to choose

Verify every required license through the state lookup before signing a contract. Confirm the contractor belongs to the Mass Save Heat Pump Installer Network when rebates form part of the quote. Request a whole-home energy assessment in advance of any major installation. Compare at least three written bids that separate equipment, labor, and permit fees. Ask for references from recent jobs of similar scope in the same town.

Cost

Modeled typical installed cost for a full system reaches $12,550 inside a published range of $11,300 to $13,800. Invoiced averages for 2025 sit at $23,586 with the upper quartile at $33,537. Labor is reported at $160 per hour and permit fees range from $200 to $650. The two data sources diverge because one reflects modeled national averages while the other captures actual local invoices. Both sources appear in the data set.

Climate

Bristol County falls in IECC zone 5A with 5,700 heating degree days against only 700 cooling degree days. Winter design temperature reaches 9 °F while summer design hits 90 °F under humid conditions. The load profile is heating-leaning, so equipment must deliver reliable low-temperature capacity and proper sizing to avoid short-cycling. Cold-climate heat pumps with backup remain suitable, and current electrification programs accelerate conversions from oil and gas.

Licensing and permits

Massachusetts issues no single HVAC contractor license. Refrigeration work on systems of 10 tons or larger requires a state Refrigeration Technician license. Gas piping needs a licensed Gas Fitter, electrical work needs a licensed Electrician, and ductwork needs a Sheet Metal Worker license. The responsible boards sit within the Division of Occupational Licensure. Insurance is not uniformly mandated at the state level, yet most towns require proof of general liability before releasing a mechanical permit. Permits themselves are issued locally under 780 CMR.

Incentives

Mass Save supplies the dominant state rebates, with heat-pump incentives up to $8,000 that can stack with utility offerings. Municipal light-plant customers fall outside the program and receive no Mass Save funds. The 2026 federal 25C and 25D credits have expired, leaving only the commercial 48E credit. Any homeowner pursuing the largest rebates must complete a pre-install energy assessment and use a network contractor.