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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(
838
)
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
7602 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%
13 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
87 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 Windows - 2+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
201 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

Gran Innovations
New to Angi
Window Cleaning

Serving Alton, IA and surrounding areas

Approved

Hello my names Christopher i am 23 tired of working for a boss that doesnt understand what goes into things when we install. I have finally turned over a new leaf and wanted to start dping things on my own. I have worked for a few different landscaping companys, i have done some demo work for family and friends, i also worked at thrasher for ahile working my way up to team lead. I just had a baby last year on December and i want to be able to see her grow! Thats why im here to get jobs that i want. I dont wanna work for a boss who has no idea how the stuff i install goes in. I want to be thats hands on boss that is for the customer. Tired of meeting quotas. I want to love what i do for work and believe you me i love getting dirty and getting the job done. I am only 23 but i am very hard wokring. Not affriad to try something new or get dirty! If you have any jobs small or big just let me know.

...
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Windows FAQs, answered by experts

A window may fail because of age, defective mechanisms, or moisture. Depending on the issue, the window may be fixed with simple repairs. Otherwise, you’ll have to invest in replacing it. You can avoid damaged windows but keeping up with window maintenance.   

Most windows last between 15 and 30 years. The exact life span depends on a few things, including the frame material, the quality and type of glass, the weather in your area, whether or not the window is installed properly, and more. You can always speak with a window professional about whether or not it’s time to replace your windows or if repairs would be more affordable. You’ll need to consider the cost of replacing your windows, the cost of repair, and the longevity of each solution.

ENERGY STAR®-certified windows are the most energy-efficient windows on the market. This certification means that the window meets strict efficiency guidelines set forth by the Environmental Protection Agency. While they might cost more upfront, they can save you money on your energy bills in the long run. ENERGY STAR®-certified windows lower household energy bills by an average of 12% annually.

A double-hung window features two operable sashes, meaning it has an upper window part and a lower part that can both open to let in fresh air. A picture window has one fixed glass panel that doesn’t open. Double-hung windows cost about $200 to $2,500, while picture windows cost about $200 to $1,900.

Having a professional caulk your windows will cost you around $50 to $70 per window (or $1.25 to $4 per linear foot), including labor. However, caulking is one of the easiest DIYs there is, and you’ll save a lot of money by getting the supplies and doing it yourself. You’ll only pay $0.05 to $0.20 per linear foot if you DIY this one. Finally, different types of caulk don’t vary too much in price, with most tubes costing no more than $15 apiece (but typically only $3 to $10) at the most. 

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.