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10 Best Window Replacement Companies in Diamond Bar, CA

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Written By David Cusick

Last Updated February 2024

Whether you want to increase your home's value or decrease your energy bills, upgrading your windows is an excellent idea. In Diamond Bar, where the electricity bills are $1,200 per year on average, you could be spending an extra $356 annually due to outdated or drafty windows. The Department of Energy estimates that heat gained or lost through windows could make up close to 30% of heating and cooling costs. Picking the best company for you is an important decision. That's why we've put together this list of the top window installers in Diamond Bar.

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  • Offers energy-efficient products
  • Provides a lifetime labor warranty

Top 10 Best Window Replacement Companies in Diamond Bar

Renewal by Andersen of Los Angeles

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18700 Crenshaw Blvd, Torrance, CA 90504 (310) 214-2222 renewalbyandersen.com

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Price transparency

Good customer service

Educational website

Services Offered

Glass doors
Skylights
Bay windows
Window replacement/installation
Double-hung

Window World of Los Angeles

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718 Arrow Grand Cir, Covina, CA 91722 (310) 564-7299 windowworldla.com

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Price transparency

Educational website

Good customer service

Services Offered

Glass doors
Double-hung
Bay windows
Vinyl frames
Window replacement/installation

Design Windows and Doors Inc.

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504 S Mountain Ave, Ontario, CA 91762 (909) 365-2179 designwindowsinc.com

Good customer service

Price transparency

Educational website

Timely service

Free assessment

Services Offered

Fiberglass frames
Energy-efficient options
Wood frames
Window replacement/installation
Bay windows
Vinyl frames
Glass doors
Double-hung

Sears Window Replacement

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5080 N Montclair Plaza Ln, Montclair, CA 91763 (626) 313-3940 searshomeservices.com

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Price transparency

Timely service

Educational website

Good customer service

Services Offered

Energy-efficient options
Glass doors
Window replacement/installation
Vinyl frames
Storm/impact windows
Double-hung
Bay windows

Dreamstyle Remodeling

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16223 Arrow Hwy Bldg. A, Irwindale, CA 91706 (323) 880-6095 dreamstyleremodeling.com

Educational website

Good customer service

Price transparency

Free assessment

Services Offered

Glass doors
Bay windows
Glass showers
Window replacement/installation
Custom window designs
Double-hung

La Verne Glass &Screen

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1782 N White Ave, La Verne, CA 91750 (909) 593-8317 laverneglassandscreen.net

Good customer service

Price transparency

Free assessment

Services Offered

Custom glass
Glass showers
Window replacement/installation
Custom window designs
Mirrors
Glass doors

Advance Windows & Doors

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20442 Carrey Rd, Walnut, CA 91789 (909) 444-2000 advancewindowsanddoors.com

Price transparency

Educational website

Free assessment

Good customer service

Services Offered

Tempered glass
Window replacement/installation
Double-hung
Glass doors
Bay windows
Energy-efficient options
Fiberglass frames
Vinyl frames

Home Services at The Home Depot

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3200 Puente Ave, Baldwin Park, CA 91706 (626) 385-6278 homedepot.com

Good customer service

Educational website

Price transparency

Free assessment

Services Offered

Window replacement/installation
Glass doors
Glass showers

JK Glass & Mirror Inc

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4155 Alderson Ave E, Baldwin Park, CA 91706 (626) 315-7491 jkglassca.com

Educational website

Free assessment

Price transparency

Good customer service

Services Offered

Glass doors
Mirrors
Glass repair
Window replacement/installation
Custom glass
Glass showers

Win-Dor Replacement Windows & Doors Brea Showroom

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450 Delta Ave, Brea, CA 92821 (714) 576-2030 windoronline.com

Good customer service

Free assessment

Educational website

Price transparency

Services Offered

Window replacement/installation
Vinyl frames
Energy-efficient options
Custom window designs
Glass doors
Today's Homeowner Ranking Methodology

Today's Homeowner looks at dozens of datapoints on window replacement companies to come up with our data-driven rankings. It's not possible for a company to pay for preferential treatment in our rankings. We look at the following key factors in determining who should top our list:

  • Company Experience
  • Real User Reviews
  • Company Reputation
  • Accreditations and Licenses
  • Service Area
  • Customer Service
Have questions about our methodology or company ratings? Reach out to FindAPro@TodaysHomeowner.com.

How Much Does Window Installation Cost In Diamond Bar?

The price of window installation or replacement is influenced by a number of factors, including the materials you choose, the number and size of the windows, and how difficult your windows are to access or install. On average, homeowners in Diamond Bar will spend about $290 per window*. Below are additional cost breakdowns. *Cost data based on sample pricing for window installation from multiple retailers and adjusted for local cost of living.

When To Replace Windows

Adding new energy-efficient windows can greatly increase your home's noise reduction, insulation, value, comfort, and appearance. Signs that it's time to invest in new windows include the following:

  • Windows that are difficult to open, close, and lock properly due to wear and age.
  • Outdated and inefficient window styles that take away from your home’s curb appeal.
  • Fogging between window panes, condensation issues, or rotting window frames allowing moisture intrusion into the home.
  • Discomfort and high energy bills due to poor window insulation.
  • Drafts and cold air coming in from old, loose-fitting windows.

How To Choose a Window Company

Hiring an experienced window installation company contributes to a great experience and excellent results. Below, we outline the main factors to consider when selecting a qualified window installer.

Experience

Look for well-established local installers with considerable experience. Installers that have been installing windows locally for many years are more likely to know the local climate and how to best meet your needs. Request references from recent customers to confirm a company’s reputation.

Certifications

Choose companies that have certifications from leading window brands, and that have Fenestration and Glazing Industry Alliance (formerly AAMA) certification. Having certification shows they've received proper training in installation best practices. Make sure installers are staff, not subcontractors, and confirm that any technicians working on your home are certified.

Reputation

Read through online feedback from past clients, check the Better Business Bureau (BBB), and request local references. Review customer feedback to verify that the contractor consistently provides quality work and good customer service. Avoid providers that have complaints of shoddy work or unfinished jobs.

Process

The best window installers will supply a comprehensive project plan and schedule, clear expectations, and an overview of all product and installation options. Avoid companies that offer unclear quotes or timelines that don't provide specifics upfront. Look for regular contact throughout to avoid surprises once work gets underway.

Warranties

Research window installers that guarantee their work and provide warranties on labor and materials. This shows confidence in their work. Opt for companies with unlimited lifetime warranties that can be transferred to new homeowners.

Materials

Make sure your window installer offers windows that are built to last and top energy-saving window brands within your budget. Look for design flexibility, good energy ratings, and enhanced UV protection. Check that the window materials also have manufacturer warranties.

Frequently Asked Questions About Window in Diamond Bar, CA

In Diamond Bar, the optimal time to install windows is during the winter when the temperature is not as high, so the windows can fit and adjust properly. A good local window installer in Diamond Bar will be able to tell you when the best time is to install windows on your home.

The right type of replacement windows for your Diamond Bar home depends on the year your home was built –the average house in Diamond Bar was built around 1980. For older homes, you might want to consider energy-efficient windows such as double-pane windows, which are designed to keep your home cool in the summer and warm in the winter. Wood frames also have a timeless look that's perfect for older homes. For newer homes, you can think about vinyl windows, which are affordable, durable and have a modern look.

The types of window that usually last longest are ones constructed from vinyl or wood, with triple glaze for extra insulation. Vinyl windows are known for their durability and require minimal maintenance, and wood windows provide a more traditional look. Tripling up on the glazing will help reduce energy costs over time. This is especially helpful during Diamond Bar's hot summers.

The window installation process typically involves ordering and measuring the windows, preparing the area for installation, removing the old window, installing the new one, and insulating the frame. Depending on the kind of window being put in, additional steps might be needed.

Yes, many window companies offer payment plans for their services. Different companies have their own financing options, so you should shop around to find the best option for you. Depending on your income level, which is a median of $100,776 a year in Diamond Bar, you may be able to qualify for special payment plans.

Window replacement companies in Diamond Bar typically offer a variety of services, including installation, repair, window maintenance, cleaning, tinting, and weatherproofing.

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