which solar installer
can you trust?
California>Costa Mesa
WattBot
REPORTS
customers trust
California
Window
&
Solar

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TRUST
SCORE
98
#1 of 10
solar installers
in Costa Mesa
WattBot Certified
platforms monitored
Google logoGoogle
142 reviews,
5.0
Yelp logoYelp
93 reviews,
4.8
SolarReviews logoSolarReviews
EnergySage logoEnergySage
BBB logoBBB
WattBot Certified

California Window & Solar is WattBot Certified.

Only 5% of 20,000+ companies earned this badge.Over 60% of solar installers have "excellent ratings" on Google, Yelp and more. We independently analyze them to find the ones you can really trust.

What Stood Out

California Window & Solar's story in 3 reviews.
Yelp
Farnush F.
Oct 23, 2025

Jeff and his team have been absolutely amazing! We can't say enough about them. We consulted with 6 other companies and Jeff was by far superseded our expectations. He was also willing to work with us on the price, which we are so incredibly grateful for. He never once tried to upsell us and was upfront and honest from the beginning, which speaks to the confidence in his products as well as the quality of their work. His team took 2 days to complete the installs and were incredibly hardworking and respectful- honestly just a really good group of guys. We were so impressed with them from beginning to end. Jess had also been SO responsive and gets back to you right away. We needed them to fix a part of the screens week later and he sent one of his guys over right away to fix it. We highly highly highly recommend California window and solar! You will not be disappointed!

Google
Susan M.
May 12, 2022

I highly recommend California Window and Solar. My husband and I couldn't be happier with the whole project - they made it a painless and easy process. The product they recommended is terrific and California Window and Solar was exceptionally responsive and professional. They were in constant communication about the status of our project from day 1, delivered in a timely manner, the staff was always available for questions and the crew that did the installation was quick and thorough. One of the best house project experiences we've been through!

Yelp
Melissa G.
Jun 22, 2016

We had the pleasure of working with Jeff Conkle and he was so helpful. We always love a family owned business. The price was great and so was the service. He took the time to walk around our neighborhood and show me the differences between windows etc... I had another company come out prior for an estimate and he was not very friendly and they called to tell me they couldn't replace a few of the odd size windows in our home and California Window and Solar was able to do every single one of them. They came right on time - it was a two day processes to remove and install all 14 windows including an extra large staircase window that they made special with and opening at the bottom for more airflow and it is my FAVORITE new window in the house.I have an HOA and they were really quick in getting me everything I needed to turn into the HOA including the proofs of how they would redesign our staircase window to be able to open. They were quick, but carful and very clean. I love the Milgard windows ( we got the style line) I am overall happy with everything about the purchase. Jeff even stopped by one day on his way to another appointment in our neighborhood ( my neighbors love the windows too) to ask how we like the windows and make sure everything was good. My parents even ended up using CW&S for one of their odd sized kitchen windows that they were having trouble with and I think they are going to eventually use them for Solar panels. Thank you California Window and Solar you are doing awesome business.

Performance by Work Type

ELECTRICAL

ELECTRICAL

Panel upgrades and wiring for system readiness.

5.0
SOLAR

SOLAR

Installation, permitting, and grid connection.

5.0
SERVICE

SERVICE

Repairs, maintenance, and ongoing system support.

5.0
BATTERY

BATTERY

Energy storage for backup savings and independence.

Insufficient data
ROOFING

ROOFING

Repair or replacement, before or after solar installation.

Insufficient data
COMPLEX PROJECTS

COMPLEX PROJECTS

Multi-trade installations requiring co-ordination.

Insufficient data

How We Got To 98

1. Aggregate

We tracked down every review for this company on the internet.

Google logoGoogle
142 reviews,
5.0
Yelp logoYelp
93 reviews,
4.8
SolarReviews logoSolarReviews
EnergySage logoEnergySage
BBB logoBBB

2. Weight

We weight each review based on how useful it is for new customers.

Up-Weighted
179Verified customers
15Long-term customers
95Recent
1Complaints
Down-Weighted
0Unfair
21Empty
30Shoppers

3. Analyze

We analyzed each review for five signals of work quality.

Sales Conduct98% positive
Workmanship100% positive
Project Management96% positive
Post-Sale Support98% positive
Value95% positive

4. Screen

We screened the company for other signals not captured by star ratings.

Serving customers for 13 years
BBB Rating: A+
Natural Review Patterns
Licensed Contractor

5. Score + Rank

We combined everything into a score and rank against the market.

TRUST
SCORE
98

Clean Record

Screening for serious allegations from verified customers about solar/battery work.

Unauthorized Activities

Passed screening

We checked for:
Unauthorized charges
Undisclosed loans
Identity theft
Forged signatures
Fake contracts
Falsified permits

Misleading Claims

Passed screening

We checked for:
Bait & switch
Overstated savings
Hidden fees
Misrepresented specs
False performance
Misleading warranty

Background Check

What reviews alone do not reveal about the company's track record and business practices.

Serving customers for 13 years

Among the longest-standing installers in the market.

BBB Rating: A+

Excellent BBB standing. Strong complaint resolution.

Natural Review Patterns

Reviews were posted naturally over time.

Licensed Contractor

A valid contractor license is on record.

What You Can Expect

What quality signals exist across the customer journey?
Google
Tony Gmitruk
Positive
Nov 24, 2025

I've used CWS to replace windows at our last home (12 years ago), as well as our current one. Just recently installed 20 windows and 3 French doors. Was very happy with the proposal/quote experience as we reviewed various options - Thank you, Jeff! Regarding the installation, the crew was courteous, professional and did a great job overall. We are extremely happy with our new windows and doors! One area of improvement - Milgard does not offer pet screens, which meant we had to do this after the installation. Not at all a deal breaker, but surprising that this is not an option. I would not hesitate to recommend California Window & Solar for their services.

Yelp
Terri C.
Positive
Jul 26, 2025

I used CA Windows on Redhill several years ago and when it was time to replace some windows we called them again. This is a great local company -- from sales to admin to installation, they are all knowledgeable, professional and polite. They stand behind their products and their work. I highly recommend them.

Yelp
Tom C.
Positive
Feb 14, 2025

Amazing company. I have been using them for 10 years for my home and my daughter's home. Family owned great turn around. Very responsive.

Long-term Satisfaction

Reviews from customers who hired California Window & Solar more than a year ago reveal warranty service, customer support quality, and real-world performance data. These are dimensions that recent customers cannot yet evaluate.

Review History

How many reviews have been collected from each year?