21 Best Window Replacement Companies in Los Osos, CA (2023 Reviews)
Window Companies Near Me
If you're looking to upgrade to new windows, our list of the best window installation companies can help.
We analyzed all the top window installers in Los Osos and selected the top 21 based on:
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Customer reviews
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Window replacement expertise
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Popularity with home-owners like you
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Updated March 14, 2023
Why you can trust EcoWatch
A review of the top window installation companies in Los Osos may not seem like the most captivating article on EcoWatch, but trust us, windows have a more direct impact on your life than you might think. Drafty, leaky windows can cost you in electricity bills. In fact, the Department of Energy estimates that about 30% of your home's heat or cool air could be lost through your windows.
Installing efficient windows on your property can help you save money each month on your power bills — and you can help the environment as well.
So if you're constructing a new home, renovating or changing out old windows in Los Osos, this guide is the best place to get started.
Best Overall
Renewal by Andersen
- Award-winning company
- Great industry reputation
- Manufactures products in-house
- More expensive than competition
Excellent Reputation
Milgard Windows & Doors
- EnergyStar Partner
- Wide network of installers
- Lifetime warranty available
- Limited additional services
Best Affordability
Window World
- Large serice area
- Low prices relative to competitors
- Lifetime warranty
- Quality of service will depend on your area
Best Window Replacement Companies in Los Osos
The EcoWatch team assessed dozens of window installation companies across Los Osos to narrow our list down to the best ones. The installers mentioned in this article scored best in our review categories, such as energy-efficient offerings, price, customer service, availability, local expertise and more.

Renewal by Andersen
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Award-winning company
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Great industry reputation
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Manufactures products in-house
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More expensive than competition
Renewal by Andersen has the best availability in Los Osos. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This company has 27 years of experience in the windows business, and it has become one of the most respected companies in Los Osos. Many positive reviews from customers online back the provider's reputation.
It has established itself as a company that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started.
Energy Efficiency of Renewal by Andersen WindowsRenewal by Andersen caters to eco-conscious consumers by providing energy-efficient window offerings. A handful of windows manufactured by the Andersen corporation were awarded Energy Star’s “Most Efficient” in 2021, and Andersen was named Energy Star’s Partner of the Year in 2019.
How much does Renewal by Andersen cost in Los Osos?Pricing details are not available on Andersen's website since the cost of window installment varies greatly based on how many and what type(s) of windows you need. However, based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. The best way to get more accurate pricing information is to get a free quote from the company.

Milgard Windows & Doors
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EnergyStar Partner
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Wide network of installers
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Lifetime warranty available
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Limited additional services
Milgard Windows & Doors offers the best local installation in Los Osos. This window installation company has been operating since 1962 and currently serves Anaheim, Riverside, Los Angeles, San Bernardino and Orange counties.
It has established itself as a company that offers competitive pricing, a comprehensive warranty and installers that all have a minimum of 15 years of window installation experience.
Energy Efficiency of Milgard Windows & Doors WindowsThere are a wide range of window types that Milgard Windows & Doors offers, some of which are Energy Star products. The company manufactures its own products, which gives it the freedom to make custom windows based on the climate. The company designs its own vinyl compounds and profiles to ensure a heat-stable product that performs as advertised.
How much does Milgard Windows & Doors cost in Los Osos?Pricing details are not available on Milgard's website because the cost of window replacement differs based on how many and what type(s) of windows you need. However, it offers different kinds of windows at varying price points. You can ask for a free quote on its website for more information about the cost.

Window World
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Large serice area
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Low prices relative to competitors
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Lifetime warranty
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Quality of service will depend on your area
Window World offers windows expertise in Los Osos. Window World has about 27 years of experience in the window installation business. Hundreds of positive reviews from customers online back the provider's reputation.
It has established itself as a company that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital.
Energy Efficiency of Window World WindowsIts high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home. Not all of Window World's offerings are Energy Star certified, so be sure to mention that you want Energy Star windows when inquiring.
How much does Window World cost in Los Osos?Window World does not display prices on its website, but it's known for offering some of the most affordable window installations around. Getting a free quote on its website is the best way to get more accurate information.

Universal Windows Direct
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Makes charitable contributions
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Manufactures products in-house
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Wide variety of products and services
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Lifetime warranty
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Limited service area
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Some installations carried out by third-party contractors
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Quality of service will depend on your area
Universal Windows Direct is a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. Universal has around 20 years of experience in the window installation industry. Its reputation is backed by several positive reviews from customers online.
It has an industry-leading warranty covering products, parts and workmanship for life.
Energy Efficiency of Universal Windows Direct WindowsUniversal Windows Direct's commitment to sustainability shows in its energy-efficient window offerings. The company offers energy-efficient UniShield brand windows. According to its website, UniShield window packages have higher gas fill rates and longer gas retention than most other brands on the market, and they are Energy Star products.
How much does Universal Windows Direct cost in Los Osos?Universal does not outline prices on its website, but installations typically range from $225 to $425 per window based on customer feedback. That makes Universal Windows Direct more of a budget-friendly option for window repair and replacements. Getting a free quote on its website is the best way to get more accurate pricing information.
Please note that the following companies are national, which means the quality of customer service may vary depending on your local crew. We have tried to stay unbiased and transparent by including both pros and cons for every provider.
More Window Replacement Companies in Los Osos
Construction Windows LLC
Paso Robles, CA-
No-Hassle Pricing
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Locally Recognized for Quality
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Helps Educate Customers
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Consistent Workmanship
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Windows
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Aluminum Window Frames
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Double-Hung
City Glass
Santa Maria, CA-
No-fee Quotes
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Excellent Customer Service
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Price Transparency
Services Offered
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Full-Service Installations
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Custom Window Designs
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Residential Windows
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Business Windows
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Sliding Glass
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Glass Showers
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Fast Delivery
Specialty Glass
Santa Maria, CA-
Good Customer Service
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Price Transparency
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Free Quotes
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Helps Educate Customers
Services Offered
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Custom Windows
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Glass Showers
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Commercial Windows
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Sliding Glass
Central Coast Screens
San Luis Obispo, CA-
Supports Charities
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Excellent Customer Service
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Free Quotes
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Educational Website
Services Offered
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Stained Glass
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Custom Windows
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Fast Delivery
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Sliding Glass
A-1 Glass, LLC
Paso Robles, CA-
No-Hassle Pricing
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Consistent Workmanship
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Free Quotes
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Good Customer Service
Services Offered
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Residential Windows
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Glass Showers
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Heavy Glass
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Custom Windows
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Commercial Windows
Paso Robles Glass
Paso Robles, CA-
No-Hassle Pricing
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Educational Website
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Reliable Service
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Excellent Customer Service
Services Offered
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Glass Showers
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Custom Windows
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Business Windows
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Double-Hung
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Sliding Glass
Atascadero Glass Inc
Atascadero, CA-
Helps Educate Customers
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Excellent Customer Service
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No-Hassle Pricing
Services Offered
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Residential Windows
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Architectural Glass
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Heavy Glass
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Custom Windows
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Commercial Windows
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Sliding Glass
Central Coast Reflections Window Cleaning
Nipomo, CA-
Timely Service
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Consistent Workmanship
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No-fee Quotes
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No-Hassle Pricing
Services Offered
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Custom Window Designs
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Residential Windows
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Business Windows
Arroyo Grande Glass
Arroyo Grande, CA-
Excellent Customer Service
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No-Hassle Pricing
Services Offered
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Residential Windows
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Glass Showers
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Energy-Efficient Options
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Custom Windows
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Commercial Windows
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Double-Hung
Monarch Window
San Luis Obispo, CA-
Helps Educate Customers
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Good Customer Service
Services Offered
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Residential Windows
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Architectural Glass
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Custom Window Designs
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Aluminum Window Frames
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Double-Hung
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Sliding Glass
Contractors Glass Company
San Luis Obispo, CA-
Helps Educate Customers
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Excellent Customer Service
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Price Transparency
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Free Quotes
Services Offered
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Custom Windows
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Commercial Windows
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Double-Hung
Window People
Grover Beach, CA-
Educational Website
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Good Customer Service
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Price Transparency
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No-fee Quotes
Services Offered
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Custom Windows
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Commercial Windows
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Sliding Glass
A-Town Glass & window
Atascadero, CA-
Dependable Service
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Good Customer Service
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No-Hassle Pricing
Services Offered
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Custom Windows
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Fast Delivery
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Glass Showers
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Commercial Windows
Templeton Glass
Paso Robles, CA-
No-Hassle Pricing
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Good Customer Service
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No-fee Quotes
Services Offered
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Custom Windows
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Glass Showers
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Aluminum Window Frames
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Sliding Glass
Santa Margarita Glass
Paso Robles, CA-
Excellent Customer Service
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No-fee Quotes
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No-Hassle Pricing
Services Offered
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Custom Window Designs
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Glass Showers
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Aluminum Window Frames
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Sliding Glass
National Auto Glass
San Luis Obispo, CA-
Excellent Customer Service
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Educational Website
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No-Hassle Pricing
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No-fee Quotes
Services Offered
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Custom Windows
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Sliding Glass
Estero Glass
Morro Bay, CA-
Educational Website
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Free Quotes
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Excellent Customer Service
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Price Transparency
Services Offered
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Custom Window Designs
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Residential Windows
Royalty Auto Glass
Paso Robles, CA-
Free Quotes
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Good Customer Service
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Helps Educate Customers
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Price Transparency
Services Offered
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Custom Windows
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Double-Hung
Pismo Detailing
Grover Beach, CA-
Free Quotes
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Good Customer Service
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Educational Website
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No-Hassle Pricing
Services Offered
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Custom Windows
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Double-Hung
Los Osos Glass & Window Inc
Baywood-Los Osos, CA-
Good Customer Service
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Price Transparency
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No-fee Quotes
Services Offered
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Custom Windows
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Business Windows
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Sliding Glass
Artisan Windows and Doors
San Luis Obispo, CA-
Price Transparency
Services Offered
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Custom Window Designs
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Aluminum Window Frames
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Architectural Glass
How Installing Energy-Efficient Windows in Los Osos Saves You Money
Energy-efficient windows can provide benefits in several ways. Here are some reasons you may want to think about making the switch:
- Decrease your carbon footprint: In Los Osos, you can reduce your indirect greenhouse gas emissions by about 117 pounds per year after you upgrade to energy-efficient windows.
- Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which filter out harmful UV rays, reducing fading of your furniture, carpet and other valuables.
- Protect your investment: The older your home is, the more likely it is that getting new windows will benefit you. Older homes usually have windows that are outdated, drafty or maybe even damaged in some way. Updating your windows could help raise the value of your home if you decide to sell.
- Save on power bills: According to the Department of Energy, heat gained or lost through windows makes up about 25-30% of household energy use. Installing energy-efficient models can help lower how much you have to pay, therefore saving you about 12% more on your bills.
Estimated Cost of Window Replacement in Los Osos
Each window installation company provides various services and has varying prices depending on a few factors.
How Much Do New Windows Cost?
The typical cost to replace a single window is about $600 but can range anywhere from $200 to $1,200. These figures vary based on the specifics of your installation, such as the location of your home, material, size, type, number of windows and more.
With windows, efficiency is the most important factor for many homeowners. Efficient windows may cost more upfront, but by increasing the efficiency of your home — especially if you live in a hot climate — they can give you many years of energy savings. According to Energy Star, purchasing certified energy-efficient windows can save Los Osos homeowners $521+ a year after replacing single-pane windows.
Another factor that influences the overall cost is the material you choose for your frame. Aluminum frames are typically the least expensive and are sturdy and relatively maintenance-free, but they provide poor insulation. On the other hand, wood frames cost the most because they are aesthetically pleasing and provide decent insulation. Fiberglass and vinyl frames provide good insulation and cost somewhere between the other two.
What Services do Window Installers Offer?
The first thing to ask yourself when considering a window replacement is: Should you get a full-frame installation or a pocket installation?
A full-frame installation replaces the total window, including the sill, frame, trim and the window panes. Because this kind of installation is more involved, it will cost more than a pocket installation. A pocket installation means replacing a window within the existing frame, which is usually cheaper than a full-frame installation.
If you're still trying to decide which kind of installation you need, you can ask your provider and get their recommendation. The choice mostly depends on the age of your window frames and if there's any damage present.
Best Overall
Renewal by Andersen
- Award-winning company
- Great industry reputation
- Manufactures products in-house
- More expensive than competition
Excellent Reputation
Milgard Windows & Doors
- EnergyStar Partner
- Wide network of installers
- Lifetime warranty available
- Limited additional services
Best Affordability
Window World
- Large serice area
- Low prices relative to competitors
- Lifetime warranty
- Quality of service will depend on your area
How We Choose the Best Window Installers in Los Osos
In our search to make your home improvements easier and more eco-friendly in Los Osos, the EcoWatch team chose the above companies as the best window installation companies in the city. Along with energy efficiency, we evaluated window companies all across the state and assigned rankings using the following methodology:
Service Area
This one is self-explanatory, but we've chosen to highlight window installation companies that serve a wide variety of states and cities so you can find the best window installation company near you.
Work Quality
When selecting new windows, the quality and variety of services often plays just as important of a role in insulation and performance as the brand you get. We do rate window installers higher if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.
Customer Reviews
We analyzed trends in recent customer feedback to determine the companies with the most customer satisfaction, weighted by sample size. Customer satisfaction might be the most important factor, as it indicates the quality of services across most other categories, including professionalism, quality of parts, cost, quality of installation, warranty and more.
Cost
This one is a give-and-take: similar to other services, cheap window installers won't always provide the highest quality service. Still, we want to make sure we're highlighting companies that provide a variety of price and financing options so they're accessible to most homeowners.
Warranty
As discussed previously, windows are a sizable investment, so you'll want to be certain that investment is well protected. Window installation companies that give you lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Last but not least, we like to see companies that have been in the industry for quite some time. Window installation companies that have more years of experience are going to earn higher rankings by our standards. We like to see at least ten years of experience.
Los Osos, CA Window Replacement FAQs
What is the average cost to install new windows?
The national average cost of installing a window is about $600 but can range between $200 and $1,200, based on a few different factors. The price is often influenced by the location of your property, the type and material of the window and the size of the window. Also, remember that energy-efficient windows may cost more upfront but can save you a decent amount of money a year in energy bills.
What are the most common types of replacement windows?
The most common types of windows for homes are casement windows, awning windows, double-hung and single-hung windows, picture windows, bay windows, transom windows and slider windows.
What services do window replacement companies provide?
Window installation professionals go to your house to remove your old windows and replace them with new ones. Some companies install products manufactured by other companies, whereas others install their own windows. The installer will also clean up after the installation.
How long does it take to install windows?
Each window takes about 30 minutes to install based on the kind of window. However, the window installation can be a two-day job — or more — if you need to have a lot of windows installed.
How do you know it's time to replace your windows?
Windows have an average lifespan of about 20 to 30 years. If your windows are older than that, then they should probably be replaced. Other than that, if your windows have any damage on them, or they have become difficult to operate, they may need to be replaced.