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Top-Rated Window pros in Alton - Updated Nov 2026

Avatar for Mad City Windows & Baths
Mad City Windows & Baths
4.4(
837
)
New Windows - 6 +New Windows - 3-5New Windows - 2

Serving Alton, IA and surrounding areas

Approved

Super Service Award Winner

In business since 2001

Free estimates

Warranties offered

"The installers were wonderful. Friendly, knowledgeable, fast and CLEAN! Youâ d barely know theyâ d been there!. And our sales person really helped us understand the best, but not most expensive windows for our house. If I need more windows they will be back!"
windows
siding
siding
siding
windows

+20

Response time10 mins
8389 neighbors recently requested a quote
Recommended by89%of homeowners
Custom Windows Plus
5.0(
5
)
New Windows - 2New Windows - 2 - For BusinessNew Windows - 3-5+3 more

Serving Alton, IA and surrounding areas

Approved

In business since 2005

Free estimates

Credit card accepted

"Andrea was great to work with and she wasn't pushy like a few others I got quotes from. She knew the product and was able to answer questions. Brett and Aurelio was great when they came to install the windows. They explained how the process was going to go and how long it should take. Great group of people and would highly recommend them."
Historical Building
Close up - Before
Close up - After
Windows
Sibley Home

+17

Response time1 day
Response rate88%
Recommended by100%of homeowners
Avatar for Crawford's Services LLC
Crawford's Services LLC
5.0(
13
)
Window Cleaning

Serving Alton, IA and surrounding areas

Approved

In business since 2024

Free estimates

Small jobs welcome

"Yes!!! They showed up on time. Worked very efficiently. Very nice people. We have already booked them for future window cleaning. Exceeded expectations 🙏"
Home in Spencer
Home in Spencer
After Photo
Before Photo
After

+2

Response time4 hrs
Response rate96%
Recommended by76%of homeowners
Avatar for Timeless Exteriors LLC
Timeless Exteriors LLC
5.0(
6
)
New Windows - 6 +New Windows - 3-5New Windows - 2 - For Business+6 more

Serving Alton, IA and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

Timeless Exteriors: Your local experts in high-quality siding and window solutions. ✨ We transform homes with energy-efficient, durable, and beautiful upgrades. From free estimates to flawless installations, we’re here to make your home stand out. Contact us today! #HomeImprovement #ExteriorUpgrades

Siding and Windows
Siding and Windows
Siding and Windows
Siding and Windows
Additional Photos

+3

Response time2 days
Response rate100%
12 neighbors recently requested a quote
Avatar for Your Home Improvement Company
Your Home Improvement Company
3.8(
251
)
New Windows - 6 +New Windows - 3-5

Serving Alton, IA and surrounding areas

Approved (Corporate)

In business since 2004

Free estimates

Warranties offered

"Replaced all windows and patio door. Did just what they said that they would do. Sent an update email every couple weeks while the windows were being constructed. Install went very smoothly. Only unexpected delay has been getting the city building inspector out here now that work has been completed."
Windows
Windows
Doors
Doors
Siding

+14

Response time2 hrs
81 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for Xtreme Xteriors, LLC
Xtreme Xteriors, LLC
3.3(
15
)
New Windows - 6 +New Windows - 3-5New Window - Single+2 more

Serving Alton, IA and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"We had an exceptional experience with Xtreme Xteriors. We were able to do window replacement on our 1978 built home. They turned out great. After that project, we had them do a bathroom remodel for us. They replaced our old fiberglass tub with a nice new walk-in shower. They did everything start to finish!"
Egress window
4 season patio room with sky lights
Easy breeze room.
3 season patio room
4 season patio room

+19

Response time8 hrs
182 neighbors recently requested a quote
Recommended by55%of homeowners
Avatar for Mad City Windows & Bath - Sioux Falls
Mad City Windows & Bath - Sioux Falls
New to Angi
New Windows - 2New Windows - 3-5

Serving Alton, IA and surrounding areas

Approved

In business since 2001

Free estimates

Warranties offered

To learn about Mad City Windows and its history, you need to start back in 1998 when our family-owned company first opened its doors and changed the face of home remodeling in Wisconsin. From the beginning, our business has been built on a foundation of friendship and trust and, in return, local homeowners have come to know they can place their trust in us. In order make certain that we consistently earn that trust, we are dedicated to ensuring the expert, seamless delivery of high-quality products and remodeling solutions to homeowners throughout our service area. \n \nToday, we expand our home remodeling expertise across Wisconsin, Minnesota, Iowa and Illinois. With over 50,000 completed projects, we take our 2+ decades of experience to serve the communities of Minnesota, Iowa and Illinois. They can expect our highest standard of service and professionalism.

Testimonial Letter(s)
Home Exterior + Bath
Home Exterior + Bath
Home Exterior + Bath
Home Exterior + Bath

+18

Avatar for Kevin Calderon
Kevin Calderon
4.5(
2
)
Door or Window Screens - Install or Repair

Serving Alton, IA and surrounding areas

Approved

Free estimates

Credit card accepted

Offers commercial services

We pride our company on reliability, great communication, integrity, and \nquality work. We are experts in our trade and will do our best to keep you \nas educated as we can on your particular task or project. We look forward \nto earning your business! Book with us online or feel free to give us a call \ntoday!

Garza porch
Garza porch
Garza porch
Garza porch
23 neighbors recently requested a quote
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Windows FAQs, answered by experts

Wood windows are often worth the cost because they add more to curb appeal and your home value than more affordable options like vinyl and aluminum. Wood windows also offer better insulation than vinyl and aluminum windows, and they can last about twice as long. As such, they’re more expensive up front but offer greater value and a higher ROI.

In short, it depends. After 20 years, the glass in your windows is less energy efficient, which can cause increased electricity bills. You might also see signs of water damage or natural wear and tear over the years. However, with proper maintenance, some window frames can last up to 50 years, so you may only need to replace the glass to save on energy. 

At the same time, window replacement is a major investment, so replacing the glass in rooms most impacted by outdoor temperatures is one way to avoid going all-in to replace your windows.

Because egress windows are meant for emergency exiting and entering, they need to be an accessible size. The smallest an egress window is allowed to be is 15 inches in width and height, with an opening of around 4 square feet.

The best thing to clean windows with is a mixture of white vinegar, warm water, and dish soap. This will remove dirt, pollen, and grime without destroying any tints or protective films on your glass. You can also use a commercial window cleaner, but make sure to choose one that doesn’t have ammonia in it, as this can damage window coverings and frame materials over time.

Making a window in a basement larger costs an average of $4,200. You’ll need to pay an average of $550 to have a structural engineer plan the project, $500 to $1,500 for the installation labor, and an average of $2,200 for the excavation and window well installation. The remainder will go toward pulling permits, installing trim, and repairing drywall on the interior.

The Alton, IA homeowners’ guide to window services

From average costs to expert advice, get all the answers you need to get your job done.