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Capstone MechanicalHVAC contractor in Portsmouth, NH

Capstone Mechanical is an HVAC contractor at 755 Banfield Rd, Portsmouth, NH 03801, ranked #15 of 173 HVAC contractors in Portsmouth and rated 3.4 from 5 Google reviews. Open 24 hours a day, 7 days a week.

Portsmouth, NHUpdated 0 paid placements in any rankingHow we rank

Call (603) 319-8389Website ↗

Key facts

Key facts about Capstone Mechanical
Address755 Banfield Rd, Portsmouth, NH 03801Get directions
Phone(603) 319-8389
Websitecstonemechanical.com
HoursOpen 24 hours, 7 days a week
Google rating3.4 from 5 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • HVACmain tradeGoogle main category

Service area

Serves Portsmouth and 11 towns within 25 miles: Rye, Stratham Station, Hampton, Newmarket, Exeter, Durham, Seabrook, Dover, Kingston, Somersworth and Barrington.

Based in Portsmouth, NHView on map

Opening hours

Opening hours for Capstone Mechanical
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

Capstone Mechanical compared with nearby businesses
BusinessRankCR ScoreGoogle ratingLicense verifiedSaturdaySundayDistance away
Capstone Mechanical (this business)—573.4 (5)—YesYes
Modern Temperature Control#13584.9 (96)—YesYes17.7 mi
Jordan Signature Heating#14575.0 (21)—YesYes8.8 mi
HVAC Plus LLC#16575.0 (75)—YesNo10.6 mi

See all 173 ranked HVAC contractors in Portsmouth

Reviews

ContractorsRanked reviews

No ContractorsRanked reviews yet

Google

3.4from 5 Google reviews

Hired Capstone Mechanical? Write a review

Questions about Capstone Mechanical

How is Capstone Mechanical ranked in Portsmouth?

Capstone Mechanical is ranked #15 of 173 HVAC contractors in Portsmouth by CR Score, with 57 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 Capstone Mechanical’s hours?

Capstone Mechanical 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 Capstone Mechanical serve?

Serves Portsmouth and 11 towns within 25 miles: Rye, Stratham Station, Hampton, Newmarket, Exeter, Durham, Seabrook, Dover, Kingston, Somersworth and Barrington. 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 Capstone Mechanical?

Capstone Mechanical has a rating of 3.4 from 5 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 Capstone Mechanical?

Call Capstone Mechanical on (603) 319-8389. The business is at 755 Banfield Rd, Portsmouth, NH 03801. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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