ThreeBestRated.com
BEST RATED CONCORD, CA WINDOW COMPANIES

3 Best Window Companies in Concord, CA

Expert-recommended Top 3 Window Companies in Concord, California. All of our window companies actually face a rigorous 50-Point Inspection, which includes customer reviews, history, complaints, ratings, satisfaction, trust, cost and general excellence. You deserve only the best!

Bestoff Windows Inc. - Concord, CA Window Companies - Service Image
Bestoff Windows Inc. - Concord, CA Window Companies - Project Image
Bestoff Windows Inc. - Concord, CA Window Companies - Field Work Image
10+ YEARS IN TBR
CALL EMAIL

BESTOFF WINDOWS INC.

(5.0 Score)
1000 Detroit Avenue, Suite #S,
Concord, CA 94518 Directions

Since 1996

Specialty:

✓ Casement Window ✓ Single Pane Window ✓ Bay Window ✓ Single Hung Window ✓ Double Hung Window ✓ Picture Window ✓ Vinyl and Custom Window Installation ✓ Patio Door ✓ Window Replacement

"Bestoff Windows Inc. has been in the field for more than 23 years. Sergey O. is the founder of the company. The company specializes in new installation and retrofit window replacement. Their window replacement company is proud to provide Anlin Windows to their customers. The team has installed millions of windows. Bestoff Windows Inc. carries all major brands of the vinyl window industry. The window company has a bonded and insured team that is committed to providing you with a great product, coupled with a professional and quality installation delivered at a competitive price. They offer a transferable lifetime warranty for both the product and the installation. Bestoff Windows Inc. covers $2,000,000 of general liability insurance. Bestoff Windows Inc. offers free in-home design consultation and estimates.

2026 Update: Bestoff Windows Inc. also takes a minimum order policy and installs 5 windows."

Reviews   |   Write a Review
License #992647

Price:

Windows:
From: $2,000
To: $30,000

Contact:

(925) 457-9026 (800) 439-1449

Mon-Thu: 9am - 5pm
Fri: 9am - 2pm
Sat & Sun: Closed

TBR® Inspection Report:

West Coast Windows and Doors, INC. - Concord, CA Window Companies - Business Exterior Image
West Coast Windows and Doors, INC. - Concord, CA Window Companies - Service Image
West Coast Windows and Doors, INC. - Concord, CA Window Companies - Field Work Image
Best Window Companies in Concord CA - West Coast Windows and Doors, INC. video
5+ YEARS IN TBR
CALL EMAIL

WEST COAST WINDOWS AND DOORS, INC.

(4.9 Score)
1112 Willow Pass Court,
Concord, CA 94520
Directions

Since 1976

Specialty:

✓ Double Hung Window ✓ Specialty Window ✓ Awning Window ✓ Casement Window ✓ Vinyl Window ✓ Bay Window ✓ Bow Window ✓ Single Hung Window ✓ Patio Door ✓ Picture Door ✓ Garden Door ✓ Wood Door ✓ Sliding Glass Door ✓ Window Installation ✓ Replacement ✓ Casement Gliding Window

"West Coast Windows and Doors, Inc. is a locally owned and operated window company that has been in the field for more than 35 years. Richard Beil and Kelly Mullins are the owners of West Coast Windows and Doors. They specialize in windows, sliding patio doors, French doors, bay and bow windows, as well as pet doors. The team handles custom residential door and window contracting. The company aims to provide a higher level of service for all installations. The company has 50 standard exterior colors, custom colors, and anodized finishes. West Coast Windows and Doors, Inc. offers a full range of styles, materials, and energy-efficient options. They offer custom-designed weather strips to keep your house comfortable throughout all the seasons.

2026 Update: West Coast Windows and Doors, Inc. set high standards for their work by the team. They are diamond certified."

Reviews | Play Video | Write a Review
License #890083

Discount:

$50 for a Referral between $2,500-$4,999

Contact:

(925) 681-1776

Mon-Fri: 9am - 4pm
Sat & Sun: Closed

TBR® Inspection Report:

Lema Windows and Doors Replacement - Concord, CA Window Companies - Project Image
Lema Windows and Doors Replacement - Concord, CA Window Companies - Service Image
Lema Windows and Doors Replacement - Concord, CA Window Companies - Field Work Image
CALL EMAIL

LEMA WINDOWS AND DOORS REPLACEMENT

(4.9 Score)
950 Detroit Avenue, Unit 12,
Concord, CA 94518 Directions

Since 2007

Specialty:

✓ Window and Door Installation ✓ Doors ✓ Andersen ✓ Milgard ✓ Marvin ✓ Therma Tru ✓ Replacement ✓ Patio Doors ✓ French Doors ✓ Panoramic Doors ✓ Bi-fold Door ✓ Front Doors ✓ Interior Doors

"Lema Windows and Doors Replacement Company has been in the field for more than 20 years. The team is fully bonded, licensed, and insured. They offer high-quality window and door products. Leszek Masluch is the owner of Lema Windows and Doors Replacement, which uses crafted products from the most trusted manufacturers in the business. They provide only the best brands for vinyl, fiberglass, and wood windows and doors. They are proud to be a certified dealer of Milgard windows and doors. They also offer high energy efficiency and can save customers up to 40% on future heating and cooling costs. They offer a free estimate, warranty, and insurance.

2026 Update: Lema Windows and Doors Replacement Company team provides excellent customer service and ensures that customers are satisfied with the work."

Reviews   |   Write a Review
License #3341484

Contact:

(866) 767-5362

Mon-Sun: 9am - 5pm

TBR® Inspection Report:

Video

Write a Review for Lema Windows and Doors Replacement

Our Review Process:

  • All reviews matter:We publish both positive and negative reviews to provide a balanced perspective.
  • No censorship: Businesses cannot pay to remove or modify negative reviews.
  • Verification process: All reviews are checked for authenticity and compliance with our community guidelines before publication.
  • Fair representation: We display reviews of all ratings (1–5 stars) to help users make informed decisions.
  • Independence: We are not affiliated with the businesses we review and receive no compensation for favorable ratings.

Your honest opinion helps others make better choices. Whether your experience was excellent, average, or disappointing, we want to hear from you. For more details, check Community Review Guidelines.

Contact Business

BESTOFF WINDOWS INC. REVIEWS

Bestoff Windows is by far the Best for Less Sergey and his crew are extremely dependable and reliable. Very professional and prompt. I love my new windows and Patio door by Anlin. I highly recommend this company.

They replaced 4 windows and a sliding glass door for me over a year ago and I was happy start to finish. I was especially appreciative of all the thought Sergey put into which way the windows should open for the best air flow throughout the house. He had great suggestions and the installation team worked hard and did quality work.

A+ for quality, service and price! Sergey is terrific, and I immediately trusted him vs. other window providers who overcharge. Alex and team of installers were very thorough and professional. Loving my new windows and sliders.

These reviews are provided for information purposes and to help you make informed decisions.

To share your experience, click here or send it to reviews@threebestrated.com.

We will display both positive and negative reviews. All submitted reviews are published after verification for authenticity and compliance with our Terms and Conditions, Privacy Policy, and Community Review Guidelines.

WEST COAST WINDOWS AND DOORS, INC. REVIEWS

We replaced all of the windows in our house with West Coast Windows and Doors and everything was so smooth and easy. Kelly helped us through the whole thing, I've never thought about windows in my life so I had no idea what I wanted, but Kelly was very patient and helpful. We got a great price compared to everywhere else we looked, and it was so easy to get what we needed. We even had to change the order after we had submitted it and it was not a problem, the additional/altered windows still arrived on the original delivery date. We were super happy with our experience and would give Kelly's number to anyone we know who needs new windows.

Third time using West Coast Windows and Doors over the past five years to replace the original (and old) windows and sliders in my home. Very happy with the quality, professionalism, and price. On all three instances, the crew has showed up on time and done a great job installing and leaving the area as clean as it was when they arrived. Although I am out of windows, I will reach out to them when it is time to upgrade my front door.

Great products and customer service looking into doing business with them.

LEMA WINDOWS AND DOORS REPLACEMENT REVIEWS

These guys did an incredible job replacing my damaged, crooked, Home Depot metal front door. My fancies himself The world's greatest Carpenter but 10 years later combo the front door would not even open. The hardware was also terrible. These guys came out and replaced the molding on either side, did a beautiful job of caulking it, and replacing the hardware. The door is so quiet. It no longer wakes up the entire house when someone leaves for work at 4:00 a.m.. they gave me the option to have the factory pre-paint it and I'm glad they did, even though it took an additional 6 to 8 weeks. I cannot overestimate how good a new front door will make your entire house look. These guys are professionals, always showing up on time. I should mention you are also paying for actual professionals who deserve to be compensated barely for their trade.

They recently installed all new windows in our home. They look amazing! Only took 3 weeks for windows to arrive and took 2 days to install. The crew was great, very respectful, on time, and clean. High recommend.

The team at Lema, was incredibly professional and easygoing. They did a fantastic job with my windows and sliding door. Compared to other services in my condo, their work stood out. Highly recommend them.

TBR® Inspection Score Report

BESTOFF WINDOWS INC. Total Inspection Points: 119/120
Reviews Accuracy of : 9
Acknowledgments: 10
Business Hours: 10
Business Images: 10
Complete Info: 10
Contact Info: 10
Current Evaluation: 10
Exact Services: 10
Legitimate Ratings: 10
Location Proximity: 10
Pricing: 10
Website Source: 10

TBR® Inspection Score Report

WEST COAST WINDOWS AND DOORS, INC. Total Inspection Points: 118/120
Reviews Accuracy of : 9
Website Source: 9
Acknowledgments: 10
Business Hours: 10
Business Images: 10
Complete Info: 10
Contact Info: 10
Current Evaluation: 10
Exact Services: 10
Legitimate Ratings: 10
Location Proximity: 10
Social Media: 10

TBR® Inspection Score Report

LEMA WINDOWS AND DOORS REPLACEMENT Total Inspection Points: 117/120
Current Evaluation: 9
Reviews Accuracy of : 9
Website Source: 9
Acknowledgments: 10
Business Hours: 10
Business Images: 10
Complete Info: 10
Contact Info: 10
Exact Services: 10
Legitimate Ratings: 10
Location Proximity: 10
Social Media: 10