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Efficient Energy Solutions, Inc. offers replacement vinyl windows for every type of home and offer supplemental services – AC, insulation, heating, siding, roofing, and solar - for a modern, functional effect that’s built to last.

BBB Accreditation

A BBB Accredited Business since

BBB has determined that Efficient Energy Solutions, Inc. meets BBB accreditation standards, which include a commitment to make a good faith effort to resolve any consumer complaints. BBB Accredited Businesses pay a fee for accreditation review/monitoring and for support of BBB services to the public.

BBB accreditation does not mean that the business' products or services have been evaluated or endorsed by BBB, or that BBB has made a determination as to the business' product quality or competency in performing services.

Reason for Rating

BBB rating is based on 13 factors. Get the details about the factors considered.

Factors that raised the rating for Efficient Energy Solutions, Inc. include:

  • Length of time business has been operating
  • Complaint volume filed with BBB for business of this size
  • Response to 4 complaint(s) filed against business
  • Resolution of complaint(s) filed against business

Customer Complaints Summary Read complaint details

4 complaints closed with BBB in last 3 years | 4 closed in last 12 months
Complaint Type Total Closed Complaints
Advertising/Sales Issues 0
Billing/Collection Issues 0
Delivery Issues 0
Guarantee/Warranty Issues 0
Problems with Product/Service 4
Total Closed Complaints 4

Customer Reviews Summary Read customer reviews

1 Customer Review on Efficient Energy Solutions, Inc.
Customer Experience Total Customer Reviews
Positive Experience 0
Neutral Experience 0
Negative Experience 1
Total Customer Reviews 1

Additional Information

BBB file opened: March 22, 1991 Business started: 01/01/1978 in CA Business started locally: 01/01/1978 Business incorporated 11/10/2011 in CA
Licensing, Bonding or Registration

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.

These agencies may include:

Contractor's State License Board
9821 Business Park Drive, Sacramento CA 95827
Phone Number: (800) 321-2752
The number is 365598.

Contractor's State License Board
9821 Business Park Drive, Sacramento CA 95827
Phone Number: (800) 321-2752
The number is 00993995.

Type of Entity


Business Management
Mr. William Hill, RMO Mr. Tim Kwan, CEO/President
Contact Information
Principal: Mr. William Hill, RMO
Business Category

Contractors - General Contractor - Electrical Electricians Glaziers Home Improvements Contractor - Insulation Plumbers Plumbing - Contractor Roofing Contractors Siding Contractors Tile - Ceramic - Contractors & Dealers Weatherization Remodeling Services Heating & Air Conditioning Air conditioning & Heating Contractors - Commercial Insulation Materials - Electric Screens - Door & Window Windows & Doors - Installation & Service Windows Windows - Vinyl Energy Conservation Products & Services Insulation Contractors Equipment & Supplies Solar Energy System Design & Installation Contractors - Solar Energy

Service Area
We proudly serve our local clients throughout Northern California.
Products & Services

Efficient Energy Solutions, Inc. is a well-established licensed and bonded home improvement company. We are currently providing heating, air-conditioning, windows, roofing, and insulation replacement. We have been servicing the greater Northern California area since 1978.

Industry Tips
Hiring a Contractor in California: Essential Tips Knowing Your Refund & Cancellation Rights Stay Informed to Keep Cool: Tips for Hiring an HVAC Service

Customer Review Rating plus BBB Rating Summary

Efficient Energy Solutions, Inc. has received 3.68 out of 5 stars based on 1 Customer Reviews and a BBB Rating of A+.

BBB Customer Review Rating plus BBB Rating Overview

BBB Customer Review Rating plus BBB Rating Overview

BBB Customer Reviews Rating represents the customers opinions of the business. The Customer Review Rating is based on the number of positive, neutral and negative customer reviews posted that are calculated to produce a score.

Customer Review Experience Value
Positive Review 5 points per review
Neutral Review 3 points per review
Negative Review 1 point per review

BBB letter grades represent the BBB's opinion of the business. The BBB grade is based on BBB file information about the business. In some cases, a business' grade may be lowered if the BBB does not have sufficient information about the business despite BBB requests for that information from the business.

BBB Letter Grade Scale

BBB Rating Value
A+ 5
A 4.66
A- 4.33
B+ 4
B 3.66
B- 3.33
C+ 3
C 2.66
C- 2.33
D+ 2
D 1.66
D- 1.33
F 1
NR -----
Star Rating scale

  Average Score
5 stars 5.00
4.5 stars 4.50-4.99
4 stars 4.00-4.49
3.5 stars 3.50-3.99
3 stars 3.00-3.49
2.5 stars 2.50-2.99
2 stars 2.00-2.49
1.5 stars 1.50-1.99
1 star 0-1.49

BBB Customer Review Rating plus BBB Rating is not a guarantee of a business' reliability or performance, and BBB recommends that consumers consider a business' BBB Rating and Customer Review Rating in addition to all other available information about the business. If the BBB Rating is NR then only Customer Reviews are used for the Star Rating.