11 Best Window Companies in Los Osos, CA (2025 Reviews)

Are you thinking about upgrading your windows? Our guide to the top window installation companies can help you pick the right one for you.

We analyzed all the top-rated window companies in Los Osos and selected the best 11 based on:

  • Customer reviews
  • Window installation expertise
  • Popularity with home-owners like you
EcoWatch Local Advisors

By EcoWatch Local Advisors

Updated January 24, 2025

Why you can trust EcoWatch

Our panel of energy experts work tirelessly to create unbiased reviews and informative content to help homeowners make educated decisions. No other windows site has covered energy efficiency and sustainability as long as EcoWatch, which means we're going to help you find windows replacements that will save on your energy bill and put more money back in your wallet.

A review of the top window replacement companies in Los Osos may not seem like the most captivating article on the EcoWatch site, but trust us, windows have more of an impact on your life than you might think. If your house has traditional, outdated windows, your HVAC system could be working overtime to heat or cool your home. This means spending more on electric bills.

Fortunately, saving you money with more efficient windows also helps our goals of conserving energy and the resources it takes to produce it.

We’ve compiled a list of the top installation companies to help you in your search, so you can not only enjoy brand-new windows, but also save money on your energy bills.

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Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

Best for Residential Windows

Window Nation

★★★★★
4.0
  • Custom Designs
  • Wide variety of products and services
  • Manufactures products in-house

Best Energy-Efficient Features

DaBella

★★★★★
4.0
  • Great warranty
  • Friendly sales representatives
  • Offers good financing options

Best Window Installation & Replacement Companies in Los Osos

The EcoWatch Reviews team researched dozens of window installation companies across Los Osos to narrow our list down to the top ones. We assessed the companies based on energy-efficient offerings, coverage area, customer service, price, local experience and more.

Window World logo
Best Affordability

Window World

★★★★★
BBB Rating: A+
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Large serice area
  • Pros icon Low prices relative to competitors
  • Pros icon Great industry reputation
  • Pros icon Lifetime warranty
Cons:
  • Pros icon 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 industry, and it currently serves 200 locations nationwide.

It 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 Windows

Window World offers some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you ask for high-quality Energy Star windows when inquiring. Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home.

How much does Window World cost in Los Osos?

Window World doesn’t have any prices displayed on its website, but it's known for offering some of the most affordable window installations around. For more accurate information on pricing, you can request a quote from the company.

Milgard Windows & Doors logo
Excellent Reputation

Milgard Windows & Doors

★★★★★
BBB Rating: A
Locations: West Coast
Founded: 1962
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Wide network of installers
  • Pros icon Lifetime warranty available
Cons:
  • Pros icon Entails hiring third-party contractors
  • Pros icon Limited additional services

Milgard Windows & Doors offers the best local installation in Los Osos. Milgard has about 60 years of experience in the industry, and it currently serves Anaheim, Riverside, Los Angeles, San Bernardino and Orange counties.

It 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 Windows

Milgard Windows & Doors offers some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you ask for high-quality Energy Star windows when inquiring. 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?

Milgard doesn’t have any prices displayed on its website, but it offers different kinds of windows at varying price points. For more accurate information on pricing, you can request a quote from the company.

Renewal by Andersen logo
Best Overall

Renewal by Andersen

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Great industry reputation
  • Pros icon Award-winning company
  • Pros icon Member of US Green Building Council
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon No lifetime warranty
  • Pros icon More expensive than competition

Renewal by Andersen offers the best availability in Los Osos. Andersen has about 27 years of experience in the industry, and it currently serves nearly every state except Mississippi and West Virginia.

It 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 Windows

Renewal by Andersen offers some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you ask for high-quality Energy Star windows when inquiring. 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?

Andersen doesn’t have any prices displayed on its website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. For more accurate information on pricing, you can request a quote from the company.

One thing to note is that the following companies are national, which means the quality of customer service may depend on your local team. We have tried to remain unbiased and transparent by including both pros and cons for every company.

More Window Companies in Los Osos

Construction Windows, LLC

Paso Robles, CA
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Vinyl Frames
  • Service icon Glass Doors
  • Service icon Metal Frames
  • Service icon Custom Window Designs
  • Service icon Fiberglass Frames
  • Service icon Window Replacement/Installation

Website: https://constructionwindows.com/
Address: 3200 Riverside Ave #120, Paso Robles, CA 93446
Phone: (800) 995-6059

Templeton Glass

Paso Robles, CA
4.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Showers
  • Service icon Window Replacement/Installation
  • Service icon Mirrors
  • Service icon Custom Glass
  • Service icon Glass Doors

Website: http://www.templetonglass.com/
Address: 3850 Ramada Dr Suite B2, Paso Robles, CA 93446
Phone: (805) 434-3438

Arroyo Grande Glass & Mirror

Arroyo Grande, CA
4.7
★★★★★
  • Pros icon Price Transparency

Services Offered

  • Service icon Custom Window Designs
  • Service icon Skylights
  • Service icon Window Replacement/Installation
  • Service icon Custom Glass
  • Service icon Mirrors
  • Service icon Energy-Efficient Options
  • Service icon Glass Doors
  • Service icon Glass Showers

Website: https://www.arroyograndeglass.com/
Address: 1012 E Grand Ave, Arroyo Grande, CA 93420
Phone: (805) 489-6900

Paso Robles Glass

Paso Robles, CA
4.7
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Glass Doors
  • Service icon Glass Showers
  • Service icon Tempered Glass
  • Service icon Mirrors
  • Service icon Metal Frames

Website: http://pasoroblesglass.com/
Address: 609 22nd St, Paso Robles, CA 93446
Phone: (805) 238-4014

A-1 Glass, LLC

Paso Robles, CA
4.6
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Metal Frames
  • Service icon Fiberglass Frames
  • Service icon Glass Showers
  • Service icon Mirrors
  • Service icon Vinyl Frames
  • Service icon Window Replacement/Installation

Website: http://www.a1glasswindows.com/
Address: 705 Paso Robles St, Paso Robles, CA 93446
Phone: (805) 227-6697

Central Coast Screens

San Luis Obispo, CA
3.2
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Bay Windows
  • Service icon Screen Repair
  • Service icon Window Replacement/Installation

Website: https://centralcoastscreens.com/
Address: 1106 Atascadero St, San Luis Obispo, CA 93405
Phone: (805) 704-6608

Los Osos Glass & Window Inc

Baywood-Los Osos, CA
3.1
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Glass Showers
  • Service icon Glass Doors

Website: http://www.losososglass.com/
Address: 2118 9th St, Baywood-Los Osos, CA 93402
Phone: (805) 528-0109

Artistic Glass

Atascadero, CA
3.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Glass Showers
  • Service icon Window Replacement/Installation
  • Service icon Glass Doors

Website: https://www.artisticshowerdoorca.com/
Address: 8408 El Camino Real, Atascadero, CA 93422
Phone: (805) 400-9241

Contractors Glass Company

San Luis Obispo, CA
2.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Glass Showers
  • Service icon Mirrors

Website: http://www.contractorsglassco.com/
Address: 60 Prado Rd, San Luis Obispo, CA 93401
Phone: (805) 543-0871

Monarch Window

San Luis Obispo, CA
2.8
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Glass Doors
  • Service icon Window Replacement/Installation
  • Service icon Metal Frames
  • Service icon Wood Frames
  • Service icon Skylights

Website: http://www.monarchwindow.com/
Address: 201 Bridge St, San Luis Obispo, CA 93401
Phone: (805) 242-2059

Artisan Windows and Doors

San Luis Obispo, CA
2.7
★★★★★
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Glass Doors

Website: http://www.artisanwd.com/
Address: 179 Granada Dr #4, San Luis Obispo, CA 93401
Phone: (805) 852-7001
Los Osos Window Cost Calculator

Calculate how much you can expect to pay for window installation and replacement in Los Osos, CA using our customized window cost calculator.

Estimated Window Cost:
161 homeowners have requested a free estimate in the last 3 days.

Estimates will vary based on window dimensions and other unique factors to your home. Getting in touch with a local window installer is the best way to get an accurate cost estimate for your home.

How Installing Energy-Efficient Windows in Los Osos Saves You Money

By switching to energy-efficient windows, you can enjoy several benefits, such as:

  • Protect your valuables: The low-emissivity coatings on many energy-efficient windows help prevent your floors, carpets and furniture from fading by filtering out UV rays.
  • Protect your investment: The older your home is, the more likely it is that switching to energy-efficient windows will benefit you. Older homes usually have windows that are outdated, drafty or maybe even damaged in some way. Upgrading your windows could help increase the value of your home if you decide to sell.
  • Reduce your carbon footprint: Since energy-efficient windows improve the insulation in your house, you can lower your indirect greenhouse gas emissions by about 12%, according to Energy Star.
  • Save money on electricity bills: The Department of Energy estimates that heat gained or lost via windows makes up about 25-30% of energy use in your home. Switching to energy-efficient windows can help lower that amount, which helps you save $521 a year on your bills.

Estimated Cost of Window Replacement in Los Osos

Windows come in all shapes and sizes, so costs and services will differ remarkably. Here are the typical costs and the primary services that you can find from window installation companies.

How Much Do New Windows Cost?

Typically, Los Osos homeowners can expect their replacement window installations to range from $250 to $1,200. The most common installations sit at approximately $600. These estimates vary depending on specific characteristics of your installation, like number of windows, the location of your home, type, size, material and more.

With windows, efficiency is the most important factor for many homeowners. High efficiency windows may cost more upfront, but by increasing the efficiency of your home — especially if you live in a hot climate — they can provide decades 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.

Requesting free quotes from several providers is the best way to figure out which one is right for you.

What Services do Window Installers Offer?

The first step when planning an installation is to think about whether you should get a full-frame or pocket installation.

Full-frame installations are necessary when you want a new style or your window has a lot of deterioration. With this service, your installers will replace the entire window, including the sill, trim and frame. A pocket installation means replacing a window within the existing frame, which is usually cheaper than a full-frame installation.

If you’re hiring a reputable window installation company, your company will be able to advise you on the best type for your project. In Los Osos, the choice will mostly be based on how much damage there is currently and how old your existing frames are.

Advertisement

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

Best for Residential Windows

Window Nation

★★★★★
4.0
  • Custom Designs
  • Wide variety of products and services
  • Manufactures products in-house

Best Energy-Efficient Features

DaBella

★★★★★
4.0
  • Great warranty
  • Friendly sales representatives
  • Offers good financing options

How We Choose the Best Window Installers in Los Osos

EcoWatch reviews differ from most reviews since we assess these companies through a sustainability lens. We have assessed the top window installers in Los Osos primarily based on energy efficiency, as the most sustainable option also benefits homeowners in many ways. Energy-efficient windows can cut your energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:

Service Area

Because this is a guide for Los Osos, we paid more attention to companies that cover the city. There are certainly other reputable providers that didn’t make our list because they wouldn’t be able to serve homeowners in Los Osos.

Work Quality

When choosing new windows, the quality and range of services often plays just as important of a role in insulation and performance as the brand you opt for. We do give window installers more points if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.

Customer Reviews

We analyzed patterns in recent customer feedback to determine the companies with the most customer satisfaction, weighted by sample size. Customer satisfaction might be the factor we place the most value on, as it indicates the quality of services across nearly every category, including quality of parts, cost, warranty, professionalism, quality of installation and more.

Cost

This one is a give-and-take: as with most services, cheap window companies are not going to provide the most quality service. On the other hand, we want to make sure we’re highlighting companies that provide a wide range of price and financing options so they’re accessible to most homeowners.

Warranty

Protecting your investment in new windows is important. For that reason, window installation companies that have lengthy warranties for products, parts and labor rank higher with EcoWatch.

Years of Experience

Lastly, we like to see companies that have been in the industry for quite some time. Window installation companies that have more experience will 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 replace windows in a home?

The national average cost of installing a single window is around $600 but can range from $200 to $1,200, depending on several factors. The price is often influenced by the type and material of the window, the location of your property and the size of the window. Also, bear in mind that energy-efficient windows may cost more upfront but can save you hundreds of dollars a year in energy bills.

What are the most common types of replacement windows?

There are several different kinds of windows you can get for your home, such as bay windows, awning windows, casement windows, double-hung and single-hung windows, transom windows, slider windows and picture windows.

When do I need to use a window installation company?

You should use a window installation company whenever you need new windows. Installing windows is a complex process that can take a lot of time, so it’s best left to the professionals.

Should I replace my windows all at once?

If you’re upgrading your windows to get more efficient windows, replacing all of your windows at once is the only way to see a noticeable difference. However, if you have only one or two windows that are broken or leaky, you can replace just those.

How long does window installation take?

Since a window takes about 30 minutes to install, around 16 windows can be installed in an 8-hour work day.