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McDonnell Mechanical ServicesHVAC contractor in Barnstable, MA

McDonnell Mechanical Services is an HVAC contractor at 79 School St, West Dennis, MA 02670, ranked #20 of 185 HVAC contractors in Barnstable and rated 4.4 from 24 Google reviews. Open 24 hours a day, 7 days a week.

Barnstable, MAUpdated 0 paid placements in any rankingHow we rank

Call (508) 394-0005Website ↗

Key facts

Key facts about McDonnell Mechanical Services
Address79 School St, West Dennis, MA 02670, Barnstable, MAGet directions
Phone(508) 394-0005
Websitemcdonnellmechanical.com
HoursOpen 24 hours, 7 days a week
Google rating4.4 from 24 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • HVACmain tradeGoogle main category

Service area

Serves Barnstable and 11 towns within 25 miles: South Yarmouth, West Yarmouth, Yarmouth, Yarmouth Port, Harwich, Hyannis, Centerville, Marstons Mills, Eastham, Mashpee and East Falmouth.

Based in Barnstable, MAView on map

Opening hours

Opening hours for McDonnell Mechanical Services
DayHours
MondayOpen 24 hours
TuesdayOpen 24 hours
WednesdayOpen 24 hours
ThursdayOpen 24 hours
FridayOpen 24 hours
SaturdayOpen 24 hours
SundayOpen 24 hours
  • Open 24/7
  • Open evenings — no
  • Open Saturdays
  • Open Sundays
  • Emergency service

Typical heating and cooling prices

Typical heating and cooling prices
JobLowTypicalHigh
AC replacementPer system, installed (unit plus labor); typical range of customer-reported jobs. US national range$3,887$5,978$8,073
Furnace replacementPer system, installed; typical range of customer-reported jobs. US national range$2,823$4,814$6,896

Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.

Compare nearby HVAC contractors

McDonnell Mechanical Services compared with nearby businesses
BusinessRankCR ScoreGoogle ratingLicense verifiedSaturdaySundayDistance away
McDonnell Mechanical Services (this business)—604.4 (24)—YesYes
High Efficiency#18604.7 (283)—YesYes17.1 mi
Thonus North Plumbing, Heating & Air Conditioning#21604.8 (80)—YesYes4.9 mi

See all 185 ranked HVAC contractors in Barnstable

Reviews

ContractorsRanked reviews

No ContractorsRanked reviews yet

Google

4.4from 24 Google reviews

Hired McDonnell Mechanical Services? Write a review

Questions about McDonnell Mechanical Services

How is McDonnell Mechanical Services ranked in Barnstable?

McDonnell Mechanical Services is ranked #20 of 185 HVAC contractors in Barnstable by CR Score, with 60 out of 100 as of October 2026. The score weighs reputation, credentials, review volume, recency, availability, trade focus, proximity, claimed profile, partnered and ContractorsRanked reviews. No business can pay to change its rank.

What are McDonnell Mechanical Services’ hours?

McDonnell Mechanical Services is open 24 hours a day, 7 days a week. Its listed hours are Open 24 hours, 7 days a week. On Saturdays it is open Open 24 hours, and on Sundays Open 24 hours. Hours come from the business listing; holiday hours may differ.

What areas does McDonnell Mechanical Services serve?

Serves Barnstable and 11 towns within 25 miles: South Yarmouth, West Yarmouth, Yarmouth, Yarmouth Port, Harwich, Hyannis, Centerville, Marstons Mills, Eastham, Mashpee and East Falmouth. The list is based on the business's location and the usual service radius for heating and cooling. Confirm your address is covered when you call.

What do Google reviews say about McDonnell Mechanical Services?

McDonnell Mechanical Services has a rating of 4.4 from 24 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

How do I contact McDonnell Mechanical Services?

Call McDonnell Mechanical Services on (508) 394-0005. The business is at 79 School St, West Dennis, MA 02670, Barnstable, MA. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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