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Business Profile

Heating and Air Conditioning

William G. Day Company
BBB accredited business seal
BBB Accredited BusinessA+Rated by BBB
Visit Website(302) 427-3700Write a Review

About

Overview

William G. Day Company

330 Water St Ste 109

Wilmington, DE 19804-2433

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See Hours
Operating Hours
7:00 AM - 4:00 PM
7:00 AM - 4:00 PM
7:00 AM - 4:00 PM
7:00 AM - 4:00 PM
7:00 AM - 4:00 PM
Closed
Closed

BBB Accreditation & Rating

William G. Day Company is BBB Accredited.

BBB accredited business seal

This business has committed to upholding the BBB Standards for Trust.

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About This Business

William G. Day Company is a family owned and
operated company offering a full line of residential and commercial plumbing,
heating and air conditioning services in New Castle County, DE and the surrounding area.  Specific services include:

 



  • Heating repair, service and installation

  • AC repair, installation and service

  • Plumbing repair, leaks and installation of new systems

  • Toilet repair

  • Water heater replacement, repair and installation

  • Indoor air quality solutions

  • Heat pump repair, replacement and installation

  • Geothermal

BBB Accredited Since: 4/30/2023

Years in Business: 49

Products and Services

AC Installation, AC Repair, Furnace Installation, Heating Installation, Heating Repair, HVAC Maintenance, Indoor Air Quality, New Plumbing Installation, Plumbing Fixtures, Plumbing Repairs, Re-piping Services, Water Heater Installation, Water Heater Replacement, Water Heaters

Business Details

Local BBB:
BBB Serving Delaware
BBB File Opened:
11/3/2010
Business Started:
1/1/1977
Business Incorporated:
5/27/1997
Type of Entity:
Corporation
Business Management:
Ms. JoAnne E Marcocci, Owner

Additional Contact Information

Customer Contacts
Ms. JoAnne E Marcocci, Owner
Fax numbers
Primary Fax: (302) 427-3755
Social Media

Licensing information

This business is in an industry that may require professional licensing, bonding or registration. BBB encourages you to check with the appropriate agency to be certain any requirements are currently being met.

Additional Information

Payment methods
  • Cash
  • Check
  • Credit Card
  • Debit Card
  • Venmo
Visa, Master Card, Discover, American Express, Cash, Check, Money Order
Refund and Exchange Policy
Per the company, please inquire with their office. Each customer and their equipment manufacturer may have different warranty/ exchange  options and policies. 
Other Resources
Contractor Registry State of DELAWARE
655 S Bay Rd Ste 2H
Dover DE 19901
Phone Number: (302) 430-7739
https://contractorregistry.delaware.gov/
[email protected]
Delaware Division of Professional Regulation
Cannon Building, Suite 203
Dover DE 19903
Phone Number: (302) 744-4500
https://dpr.delaware.gov/
[email protected]
Business Categories
Heating and Air Conditioning, Plumber, Air Conditioning Contractors, Air Conditioning Repair, Residential Air Conditioning Contractors, Heating Contractors, Furnace Repair, Heating System Repair, Air Conditioning Cleaning, Tankless Water Heaters, Water Heater Dealers, Energy Audit, Plumbing and Heating, Household Garbage Disposal, Water Heater Installation, Heating Equipment, Water Heater Parts, Thermostats, Sink Repair, Residential Plumber

Latest Reviews

  • Meg H

    "I've used William Day a lot over the years, and they are always great to work with, reliable, communicate well, and do quality work. I always know I can trust them!"

  • Russell P

    "WOW WOW wow! These guys are Professional and friendly - awesome!"

  • Bob C

    "They came out and charged 89.00 to conduct diagnostic on tankless water heater, determined it needed blower motor replaced, estimate 950." ... Read full review

View all Reviews

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When considering complaint information, please consider the company's size and volume of transactions. Note that the nature of complaints and a company’s responses to them are often more important than the number of complaints. BBB Business Profiles generally cover a three-year reporting period.