Factory Direct Windows
No Games, No Gimmicks, No Non-Sense. Just Great Windows At The Best Prices
Getting your new windows without breaking the bank is easy with United Windows
Buy Factory Direct & Save!
10 Simplicity Series Windows Starting at $6,995 Installed*
We are United Windows. A manufacturer of very high quality replacement windows and patio doors. United Windows sells direct to you the homeowner and cuts out the middleman to save you money.
Finding the Right Company for Vinyl Windows Is Simple With Factory Direct United Windows
If you’re a prepared shopper, seeking the best windows is a very possible task, and in fact, it’s quite easy. United Windows has made the process easy, and all you’ll have to do is decide which styles you’re going for. Those in search of vinyl windows in California can turn to the professionals at United Windows to add value and energy efficiency to their homes in one fell swoop.
Energy Efficient Vinyl Windows
Guaranteed best prices in the California region
Energy Efficient Vinyl Patio Doors
Best prices for safety, security, and serenity
French Sliding Patio Doors
Beauty, affordability and high energy efficiency
Doors & Windows In All Shapes & Sizes
We manufacture all our own doors and windows
New Construction Windows & Doors
We Do Custom Window Manufacturing Better
140+
Custom Window & Door Types
We offer a variety of window and door sizes for all situations
50K+
Residential Homeowners
Over fifty thousand customers across California depend on us
500K+
Products Delivered
We've delivered over 1/2 a million custom products
95%
Satisfaction In California
Our reputation as a window factory speaks for itself
Our Factory Reputation Is As Solid As Quartz
We have thousands of satisfied return window and door customers
Our Reputation Is As Solid As Quartz
Tons of happy California homeowners
Factory Direct Value
We Beat Any Price For New Windows & Patio Doors
As a provider of new construction and replacement windows for nearly two decades, United Windows provides all of these important features at a high level. Not only will you be getting the highest quality replacement windows but you will also be getting the best price guaranteed.
Guaranteed Best Price
Beauty and aesthetic improvement is within reach with our guaranteed lowest price in California
Always Energy Efficient
All our custom windows & doors lower your power bill since we have energy efficiency in mind first
How to Select the Right Vinyl Windows & Doors For Your California Home
Think of your entire home’s look, and if you’re remodeling, picture your new and improved home in your mind. Look through United Windows’ extensive selection of vinyl windows, patio doors and decorative grids. Keep the practical aspects in mind – pick thermal performance specifications that match your needs.
Learn about the materials you need
Choose how energy efficient your products should be
Select what style you are looking for
Quality Factory Direct Windows & Doors
Our endless custom selection of custom factory direct energy efficient windows and doors will fit any homeowners style in California
What California Customers Say
California homeowners have great things to say about our custom manufactured windows and doors
Patricia Hein
I have used this company twice. I am extremely satisfied with my sliding door and windows. The service is excellent from beginning to end. They all work so easily and look great. They always came on time. The installers were very clean and did an excellent job at installing and cleaning up afterword. The prices were very good too. I would highly recommend this company for your sliding doors and windows.
Angie Alvarado
I have been using United Windows since 2013. Not only do I use them for all my remodels but I also used them for my personal home! I also refer them to EVERYBODY! They do an amazing job! No complaints at all. They have great service, a great product and they have very reasonable pricing. I never have to worry about their quality of work or products. It makes me so happy to find a company who I can just feel at ease with.
Kuu Huynh
We had a great experience purchasing from United Windows. Called and made an appointment. The rep that arrived came not only on time but 5 minutes early, unlike another company who didn't even show on the appointed time and day that we scheduled. United windows were extremely prompt, had great communication and delivered on quality windows. 5 Stars for Jonathan and his team.
Quality, Factory Direct Vinyl Windows & Patio Doors In California
Our Simplicity Series Profile smooth lines make this an ideal window for all applications.
No FLIMSY vinyl here. Relax with virtually maintenance-free vinyl frames that won’t warp, rot, peel, or fade.
Live worry-free with United’s Full Lifetime Warranty with glass breakage protection.
Enjoy effortless operation and easy-glide window panels with smooth nylon rollers.
One –way weephole technology let’s the moisture out but keeps dirt dust and insect from coming in.
AAMA and NFRC certified to meet or exceed industry structural and energy efficiency standards.
Enjoy superior energy savings and protection against fabric fading with Cardinal’s LoE366® glass.
Argon gas filled insulated glass unit for superior insulation.
© 2025 United Windows - All Rights Reserved
*10 Window Special Exclusions:
• Maximum 820 united inches (see below)
• Tempered glass not included
• Casement, arch, double hung, bay, garden or bow windows not included
• Color frames, grids extra
Width + Height = United Inches
Example: 36″ Width + 48″ Height = 84 United Inches