Window & Door Replacement in Janesville, WI

Trusted by 25,000+ homeowners for premium window and door replacement.

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who we are

Your Trusted Window & Door Company in Janesville, IL

Your windows have the ability to add or detract from the comfort and style of your home. When you invest in quality windows and expert installation with NEXT Door & Window, you’ll find that you’ve never felt more protected and satisfied with the look of your home. Our windows also provide the extra energy efficiency you’ve been looking for.

The Problem

Your vinyl and wood windows don’t last

How long have you been dealing with leaky, old, and inefficient windows?

Vinyl Windows

Expand and contract
Warp, crack, and leak
Yellow and fade
Fail in extreme weather

Wood Windows

Rot, crack, and split
Mold and mildew damage
Insect infestation
Maintenance required

The solution

Fiberglass Windows Last up to 50 Years

Thinner frames for bigger views
Most durable windows on the market
Better than 99% of window replacement options
8x stronger than vinyl for true longevity
Stays snug and tight
Better energy efficiency

Types of Windows We Offer

SPECIALTY SHAPE

Picture

Corner

Sliding

Double Hung

Casement

Bow

Bay

Awning

Our Replacement Window Brands

Window Replacement

Replacement Windows in Janesville, IL

At NEXT Door & Window, we want you to have the window you’ve always pictured, so we offer an extensive number of window types to choose from. Your satisfaction is our priority, and we ensure all of our installations and replacements are completed with precise detail. You’ll love the new addition to your home.

full-frame replacements

pre-painting & pre-staining

free estimates

quality assurance check

factory-trained & certified installers

One Call Promise Service

Our Process

NEXT Level EZ process for you the homeowner

Free consultation

Custom quote & product selection

Professional installation

Final walkthrough

Post-installation support

Ready to upgrade your windows?

Schedule your free in-home consultation today.

DOOR REPLACEMENT

Door Replacement in Janesville

Your door is the first part of your house that you see as you enter, and it should reflect the personality, style, and care that is on the other side of it. Not only can your door make an elegant statement, but it’s also essential in keeping your home secure and energy efficient. Our quality exterior doors provide phenomenal protection against drafts, as well as a number of other benefits that will have you celebrating your investment in one.

Energy efficiency

Curb appeal

Security

Types of Doors We Offer

Storm Doors

Bi-Fold (Exterior)

Sliding French (Exterior)

Sliding Patio (Exterior)

Inswing French (Exterior)

Patio Doors

Entry & Front

reviews

What Homeowners in Janesville Are Saying

Next Door and Window

4.8

Based on 378 reviews

review us on

james collins

6 months ago

Excellent service:
Our installer, Zack, called to inform us of his imminent arrival and arrived on time. He worked diligently without taking any breaks. Installation was flawless. He cleaned up afterwards and answered all questions and concerns.

Mary Fazio

6 months ago

Efficient installing windows. Left the rooms clean and neat.

Bill White Sr

7 months ago

Amazing service and installation- very pleased with our new front door system

Lidia Sobkow

7 months ago

Exceptional service from ordering process to patio sliding door installation. The whole team was excellent and professional, very responsive, helped navigate issues with HOA. 100% recommend and worth the price.

Cesar Rolon

8 months ago

I recently had an exceptional experience with the installation of my new sliding doors by Next Door and Window. The project was extensive, requiring partial removal of my home’s front façade, yet the team handled it with remarkable professionalism and precision. Their attention to detail, craftsmanship, and commitment to quality were outstanding. I am thoroughly impressed with their work and highly recommend Next Door and Window to anyone seeking superior service and results.

Don Korta Jr

8 months ago

This was a Fantastic experience from beginning to end.
They kept in touch with me constantly, and every worker who came to my home was friendly & courteous. Very efficient.
They replace two 27yr old french doors going out to my backyard patio with a beautiful sliding glass door.
We couldn't be happier.

Kelly Story

8 months ago

We got our Costco Marvin windows through Next Door and Window. They helped take our NINE double-hung windows to these beautiful full wall sliders. From the sale, project progress, scheduling, and install have all been amazing! Clear communication was had with confidence for the team. They were clean and protected our space while working. The end product is STUNNING!

Crystal Chatman

8 months ago

I had a great experience with Next Door Windows and Doors! From start to finish, the service was professional and smooth. The team kept me informed throughout the entire process, and the installation of my new patio doors was done with great care and attention to detail. The installer was very professional, efficient, and left everything spotless — I didn’t have to clean up a thing! I truly appreciate the quality of both the product and the service. Highly recommend!

Ian Ostergaard

9 months ago

We are very happy with our new entry door.
After a brief discussion we were presented with several options to meet our criteria. Our sales representative was thorough and patient.
Communications between the purchase and installation was excellent, preempting any need to call for a status.
Installation day was efficient and well organized. The team was professional and showed a high regard for our property,
Net message a quality product installed in a quality fashion.

Carol

10 months ago

From initially stepping into Next Window showroom until after our Infinity replacement window install, our experience was amazing! Everything went so smoothly starting with our knowledgeable and helpful salesperson who had exceptional communication. During the entire process any question we had was immediately answered. The install crew was neat, friendly and helpful. The outcome resulted in a quality window with now an updated modern visual appearance. Can’t beat the extended 10 year labor warranty that Next offered as well. We are enjoying our home’s new look!

See Our Awards

Trusted in in the Community for over 23 years

our Competitors

How NEXT Door & Window Compares

Factor

NEXT Door & Window

Typical Competitor

Full-Frame Window Replacement

Yes — removes entire frame, trim, and all

Most competitors do insert-only (pocket) replacements

Pre-Painting & Pre-Staining

Yes — in-house finishing facility

Rare among competitors; usually requires a separate painter

Labor Warranty

5-year warranty on all installation work

10-year warranty on all Infinity products

Industry standard is 1–2 years or none

Product Warranty

Lifetime coverage on most products

Varies widely; many offer limited-term only

Free Estimates

Yes — no cost, no obligation

Some competitors charge a consultation fee

Financing Available

Yes — flexible financing options available for qualified homeowners

Not universally available among local contractors

our Competitors

How NEXT Door & Window Compares

Factor

Full-Frame Window Replacement

Pre-Painting & Pre-Staining

Labor Warranty

Product Warranty

Installer Certification

Brand Selection

Free Estimates

Financing Available

NEXT Door & Window

Yes — removes entire frame, trim, and all

Yes — in-house finishing facility

5-year warranty on all installation work

Lifetime coverage on most products

Factory-trained and certified technicians

Marvin, Infinity, ProVia, Sunrise

Yes — no cost, no obligation

Yes — from $89/month for qualified homeowners

Typical Competitor

Most competitors do insert-only (pocket) replacements

Rare among competitors; usually requires a separate painter

Industry standard is 1–2 years or none

Rare among competitors; usually requires a separate painter

Varies widely; many offer limited-term only

Many competitors use subcontractors

Big-box retailers limited to house brands

Some competitors charge a consultation fee

Not universally available among local contractors

WHY CHOOSE US

Why Homeowners in Janesville Choose Next Door & Window

At NEXT Door & Window, our premium products and professional, efficient, and satisfactory services are guaranteed. Enjoy a red-carpet experience with access to your own project manager. We assign each client with a dedicated project manager so you can stay informed on the progress of your installation or replacement. We are proud to offer:

Five-Star Service
Custom Factory Paint And Stain Before Installation
Experienced Technicians
Premier Products
An A+ BBB Rating

SERVICE AREAS

Expert Window Replacement in Janesville, WI

If you’re in the Janesville, WI area and are interested in upgrading your home with a new door or window, don’t hesitate to reach out to our knowledgeable staff at NEXT Door & Window to learn about all of your options and which would be best for you. Your dream home is within reach. All you have to do is take the first step.

Next Door and Window

Proudly Serving Janesville and Nearby Communities

Upgrade Your Home with Premium Windows & Doors

Schedule your free in-home consultation today.