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TRUSTED BY SOUTH BELOIT, IL HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon89
    Verified window services reviews

Top-Rated Window pros in South Beloit - Updated Nov 2026

Avatar for 123 Exteriors
123 Exteriors
5.0(
9
)
New Windows - 3-5New Windows - 6 +

Serving South Beloit, IL and surrounding areas

Approved

In business since 2006

Free estimates

Credit card accepted

"We want to thank Dominik for his expertise and advice when choosing our windows. We needed 12 original windows replaced, and he helped us choose windows that give the house a clean, refreshing look. He was very professional and explained the energy benefits we should expect to see."
Window
Avatar for Danny's Window Cleaning
Danny's Window Cleaning
5.0(
10
)
Window Cleaning

Serving South Beloit, 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 PoundPros, LLC
PoundPros, LLC
5.0(
11
)
New Window - SingleNew Windows - 6 +

Serving South Beloit, IL and surrounding areas

Approved

In business since 1995

Small jobs welcome

Customers say: Quick response

"Jarrett was wonderful to work with. He kept to his word and on what he was going to do and kept to the price. He gave us ideas and design suggestions on the decks (2) decks. The contractor we had hired when starting the project left with no warning in the middle if it and Jarrett graciously fixed the other contractors poor workmanship to bring it to code and basically had to rebuild decks from the beginning. He did a large basement remodel for my son which turned out beautiful. My son was trying to get some furniture in thru the basement window which had to be removed and replaced. We couldnâ  t get the window out. It was a weekend and he cam eout ion his time right away. We called him for advice initially but he just came out. We have projects we definitely will. be using him for. He also painted some dormers on our very tall house and did an excellent job. Our local painter with 5 stars refused to do it-so wonâ  t ever call that guy again. You will not be disappointed hiring him."
Just starting
Beginning stages
Making Progress
Covering Pipes
Ceiling Tile

+15

Response time50 mins
Recommended by88%of homeowners
Avatar for Performance Exteriors
Performance Exteriors
4.8(
2
)
New Windows - Multiple

Serving South Beloit, IL and surrounding areas

Approved

In business since 2012

Free estimates

Offers commercial services

is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

Response time2 days
Recommended by100%of homeowners
Avatar for Mad City Windows & Bath - Madison
Mad City Windows & Bath - Madison
New to Angi
New Windows - 2New Windows - 3-5

Serving South Beloit, 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

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Windows FAQs, answered by experts

Using plastic shrink film over the window will cut down on drafts, which makes the air inside your home feel warmer. Plastic shrink film doesn’t quite have the insulative properties of a new window or of adding insulation inside the window jamb, but it will help. Plus, it’s a cost-effective solution to keeping your home warmer.

Glazing is always done from the outside of the window, while the inside doesn’t require any glazing. This is because the main purpose of glazing is to create a weather-tight seal where the glass meets the frame, protecting against drafts and moisture. Since the exterior is exposed to the elements, that’s the side that needs the weatherproofing.

Yes, including the frame instead of just referring to the glass opening for window dimensions is the standard. However, some manufacturers may refer to the rough opening instead of the framed opening when listing sizes. Always confirm which measurement a manufacturer is using before ordering windows.

Folding window installation costs about $1,600 on average, ranging from $500 to $3,000. The cost factors of this project include the size, the type of folding windows, the number of panels, and the type of glass. Different types of folding windows include:

  • Standard folding window: $200 per linear foot

  • Glazed folding window: $240 per linear foot

  • Standard folding window and swing door: $1,000 per linear foot

  • Folding window and sliding door: $2,000 per linear foot

Garden windows can add value to your home and are an attractive feature for potential homebuyers. These windows add a custom look to your home and usable shelf space for homeowners with a green thumb. You’ll likely recoup your investment when it comes time to sell.

The South Beloit, IL homeowners’ guide to window services

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