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William C Diamond Plumbing and HeatingHVAC contractor in East Hanover, NJ

William C Diamond Plumbing and Heating is an HVAC contractor at 34 Deforest Ave #9, East Hanover, NJ 07936, rated 4.9 from 499 Google reviews. Open Monday to Friday.

East Hanover, NJ0 paid placements in any rankingHow we rank

Call (973) 703-3666Website ↗

Key facts

Key facts about William C Diamond Plumbing and Heating
Address34 Deforest Ave #9, East Hanover, NJ 07936Get directions
Phone(973) 703-3666
Websitewilliamcdiamondplumbing.com
HoursMonday to Friday: 7 AM – 4 PM
Google rating4.9 from 499 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • HVACmain tradeGoogle main category
  • Plumbingbusiness name

Service area

Serves East Hanover and 11 towns within 25 miles: Hanover, Florham Park, Livingston, Roseland, Parsippany, Caldwell, Madison, Short Hills, Fairfield, Chatham and Morris Plains.

Based in East Hanover, NJView on map

Opening hours

Opening hours for William C Diamond Plumbing and Heating
DayHours
Monday7 AM – 4 PM
Tuesday7 AM – 4 PM
Wednesday7 AM – 4 PM
Thursday7 AM – 4 PM
Friday7 AM – 4 PM
SaturdayClosed
SundayClosed
  • Open evenings — no
  • Open Saturdays — no
  • Open Sundays — no

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.

Reviews

ContractorsRanked reviews

No ContractorsRanked reviews yet

Google

4.9from 499 Google reviews

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Questions about William C Diamond Plumbing and Heating

What are William C Diamond Plumbing and Heating’s hours?

William C Diamond Plumbing and Heating is open Monday to Friday. Its listed hours are Monday to Friday, 7 AM – 4 PM. It is closed on Saturdays and closed on Sundays. Hours come from the business listing; holiday hours may differ.

What areas does William C Diamond Plumbing and Heating serve?

Serves East Hanover and 11 towns within 25 miles: Hanover, Florham Park, Livingston, Roseland, Parsippany, Caldwell, Madison, Short Hills, Fairfield, Chatham and Morris Plains. 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 William C Diamond Plumbing and Heating?

William C Diamond Plumbing and Heating has a rating of 4.9 from 499 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 William C Diamond Plumbing and Heating?

Call William C Diamond Plumbing and Heating on (973) 703-3666. The business is at 34 Deforest Ave #9, East Hanover, NJ 07936. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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