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Top-Rated Window pros in Winnebago - 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 Winnebago, IL 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
8045 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Danny's Window Cleaning
Danny's Window Cleaning
5.0(
10
)
Window Cleaning

Serving Winnebago, IL and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

We help homeowners and businesses in the Janesville and surrounding areas keep their properties looking their best and protected from damage. From streak-free windows and clean gutters to driveways, siding, decks, and patios restored with pressure washing — we do it safely, efficiently, and with attention to detail.\nLicensed, insured, and focused on quality results every time.\n

Sun room
Sun room
Green house side
Green house top
Front doors

+2

12 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Mad City Windows & Bath - Madison
Mad City Windows & Bath - Madison
New to Angi
New Windows - 2New Windows - 3-5

Serving Winnebago, IL 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

+19

Infinity Exteriors
New to Angi
New Windows - 3-5New Window - SingleNew Windows - 2+1 more

Serving Winnebago, IL and surrounding areas

Approved (Corporate)

In business since 1997

Free estimates

Credit card accepted

At Infinity Exteriors, we set ourselves apart through our unwavering commitment to quality, craftsmanship, and customer satisfaction. Our comprehensive services include roofing, siding, windows, and gutters, all delivered with meticulous attention to detail. Our team consists of seasoned Project Advisors, Managers, and Installers who bring years of industry experience, training, and a dedication to high standards, ensuring every project meets our strict quality guidelines. \n \n

38 neighbors recently requested a quote
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Windows FAQs, answered by experts

On average, bay windows are three times as expensive as a standard double-hung window, so up-front cost is a major drawback. They also let in more natural light than most other types of windows, which can be a positive thing, but it can also lead to more aggressive fading and UV damage to furniture and flooring. Larger windows allow for more heat transfer, so bay windows tend to be less energy-efficient due to their size. Finally, window treatments for bay windows can be more challenging to find, and they’re more expensive than those you’d place over standard-sized windows.

Storm windows provide several key benefits. They offer improved insulation and soundproofing, which adds comfort to your home by regulating internal temperatures and blocking external elements. Storm windows also help reduce energy costs by preventing cold or hot air from getting inside. Additionally, they can protect the primary glass in your windows against weather damage.

Yes, storm windows should be tempered. According to the International Association of Certified Home Inspectors, tempered glass is stronger and can withstand temperatures higher than laminated glass. Tempered glass is important for storm windows because it protects against outside elements and household accidents by not producing sharp, jagged pieces when it breaks or shatters.

Mold on windows forms due to excess moisture from condensation, poor ventilation, or leaks. Cold glass surfaces can attract condensation, especially in winter. High indoor humidity, lack of airflow, or dust accumulation are also contributors. To prevent mold growth, improve ventilation, regularly clean sills, and consider using a dehumidifier or sealing any leaks.

Replacement windows normally don’t come with new sills, as the sill is part of the window frame that the replacement window fits inside. If you’re replacing windows, it’s a good idea to replace the sill, as well, especially since the sill will be fully exposed and easily accessible for replacement.

The Winnebago, IL homeowners’ guide to window services

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