If you hire this pro, you’re covered by a money-back guarantee. Learn more
If you hire this pro, you’re covered by a money-back guarantee. Learn more
About
We are only able to install New Replacement Windows and Patio Doors in Residential homes, Apartments & Condos. We also do replacement windows in Mobile & Manufactured Homes.
We are not able to do any Commerical style
Windows. We are not able to
Do repairs on existing windows or doors.
WE CAN ONLY PROViDE INSTALLATION
ON WINDOWS WE SELL TO THE
HOME OWNER.
We can not install and guarantee windows that we do not provide to the Homeowner.
We have been serving The Greater Sacramento & Bay Area since 1970. Completed my Contractor’s License in 1978. I have been doing Replacement Windows & Doors for over 42 years.
We Sell and install Vinyl, Wood & Aluminum high quality products. We are a Milgard Certified Dealer.
Please stop by our Showroom.
We are still a family run Business
Where the Customer always comes first.
Our low overhead allows us to pass the
Savings on to the Customer along with a full
line of financing. We guarantee 100%
Satisfaction.
Overview
Current Top Pro
Hired 205 times
18 similar jobs done near you
Background checked
License verified
7 employees
48 years in business
Business hours
This pro hasn't listed their business hours.
Payment methods
This pro accepts payments via Cash, Check, Credit card, Venmo, and Zelle.
Top Pro status
Top Pros are among the highest-rated, most popular professionals on Thumbtack.
2025
2024
2023
2021
Credentials
License verified
C20 – Warm-Air Heating, Ventilating And Air-Conditioning Contractor
License state: CA
Background checked
Passed by William Hill on Jan 12, 2021.
Services offered
Window type
Double hung (slides up and down)
Sliding (slides sideways)
Fixed / picture (does not open)
Casement (pushes open on a hinge)
Property type
Residential
Projects and media
Projects and media
Reviews
Customers rated this pro highly for work quality, professionalism, and value.
Excellent 4.9
105 reviews
5
96%
4
2%
3
0%
2
1%
1
1%
Your trust means everything to us. Learn about our review guidelines.
Read reviews that mention:
Shakeel B.
Jun 30, 2026
•
Hired on Thumbtack
Bill went above and beyond in making sure we were comfortable with moving forward with the project. He was clear about the improvements, potential hurdles, and assured that his team was the right fit for our project. We retrofitted all windows in our house, and they look great. No leaks, no drafts, and the workmanship shows.
We recently had all of our windows replaced by Efficient Energy Solutions, and the entire experience was outstanding. We chose Milgard windows with a black exterior and white interior, and they completely transformed the look of our home in San Jose. The windows look beautiful, and we’ve already noticed a difference in comfort and energy efficiency.
A huge thank you to our installers, Daniel, Gregory, and Vladimir. They were professional, knowledgeable, punctual, and paid close attention to every detail. They kept the work area clean, answered all of our questions, and made sure everything was installed perfectly.
If you’re looking for high-quality windows and a team you can trust, we highly recommend Efficient Energy Solutions. We couldn’t be happier with the results!
Details: Double hung (slides up and down) • Sliding (slides sideways) • Residential
Window Installation
Revathi D.
Aug 5, 2026
•
Hired on Thumbtack
Energy Efficient Solutions, Inc. did an outstanding job installing our new windows on time, within budget, and with excellent communication throughout. Their pricing was highly competitive, and the immediate improvement in our home's insulation has already kept our indoor temperature stable and reduced our heating and cooling needs. Bill was very professional, answered all of our technical questions clearly, and the team left the workspace spotless. Highly recommended!!
Details: Double hung (slides up and down) • Sliding (slides sideways) • Residential • Owner
Window Installation
Adeyinka A.
Jun 15, 2026
•
Hired on Thumbtack
I highly recommend this company for window replacement. They did an excellent job from start to finish, completed the work on time, and the quality exceeded my expectations. Their pricing was very fair, and the entire process was smooth and professional. I’m extremely happy with the results and would definitely use them again.
Details: Sliding (slides sideways) • Residential
Window Installation
Natalia S.
Apr 22, 2026
•
Hired on Thumbtack
Had a great experience with them. I got two quotes from different companies to replace all of my windows and my bay doors. Bill was more knowledgeable than the other guy, allowing me to get slightly larger windows than I would’ve with the other company. He also responds very quickly and is friendly with a good sense of humor. Efficient energy solutions was the more affordable of the two and the windows were going to be ready sooner.
Then day of the boys came and replaced 4-5 windows and the doors in around half a day. So much faster than I expected! They were very efficient, punctual, friendly, and respectful. My partners room was embarrassingly messy, and his room had a window to replace. Not only did they make zero mess and didn’t break anything even though I forgot to move some fragile items from the window areas, but they even cleaned my partners room. Thanks so much boys, the windows look great!
Details: 5 - 8 windows • Double hung (slides up and down) • Sliding (slides sideways) • As recommended by the professional • Residential • Owner
Efficient Energy Solutions, Inc's reply
Thank You for the great review.
It was a pleasure working with you.
Bill
Window Installation
FAQs
What should the customer know about your pricing (e.g., discounts, fees)?
We have the lowest pricing & excellent
financing available.
What is your typical process for working with a new customer?
Start with asking what their goals are for the
Project. Then answer as many questions as possible. At that point it will give me a good
Idea of their expectations and develop pricing,
Materials & type of installation for the Project.
What education and/or training do you have that relates to your work?
I have 50 years of experience dating back to
1970 starting as a Glazier. Then over the
Years I acquired the necessary experience to
Obtain all the Correct State Contractor’s
License’s to serve the Customers of the Greater
Sacramento Area.
