Are Your Windows Old, Rotting, and Leaky? NEXT Fiberglass Windows Stop Extreme Weather and Last Up to 50 Years.

When you need a window and door expert you can trust, we’re right Next Door.

Are Your Windows Old, Rotting, and Leaky? NEXT Fiberglass Windows Stop Extreme Weather and Last Up to 50 Years.

When you need a window and door expert you can trust, we’re right Next Door.

50% Off Installation

The Problem

Your vinyl and wood windows don’t last.

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

what we do

Upgrade Your Windows & Doors

Professional Service

From the first consultation to final installation, our team delivers expert guidance and exceptional service. We treat your home like our own—arriving on time, communicating clearly, and ensuring every detail exceeds expectations.

Highest Quality Materials

We partner with top-tier brands like Marvin, Infinity from Marvin and ProVia to offer premium fiberglass windows and doors that are built to perform—and built to last. Energy efficiency, durability, and timeless style come standard.

Lifetime Warranty

Your investment is protected for the long haul. Our products come with comprehensive lifetime warranties, giving you peace of mind that your new windows and doors will stand the test of time.

who we are

For Over 20 Years, NEXT Has Been Your Trusted, Local, Family-Owned Window & Door Replacement Company

We’re a local, family-owned company that always puts the customer first. Our goal is to be a trusted advisor who guides you through the process. We help homeowners find the perfect window and door solutions. And our experienced service technicians are there when you need them.

Step-By-Step

Our Hassle Free Process

STEP 1

Personal Consultation

Book a free in-home or virtual appointment with a Design & Energy Expert to discuss your vision, explore styles, and choose the ideal windows or doors for your home. We’ll provide an accurate quote and share financing options, so you know what to expect in terms of cost.

STEP 2

Expert Planning

We take accurate measurements and finalize your custom order. Our team handles all necessary documentation and walks you through what to expect before installation day.

STEP 3

Seamless Installation

Our factory-trained, certified installers arrive ready to work with care and precision. We minimize disruptions to your home and thoroughly clean up when the job is done.

STEP 4

Post-Install Support

Enjoy your new windows and doors with confidence. We will follow up to ensure your satisfaction and remain available for any future questions or service requests.

Book Now

Schedule a Free Consultation

in home consultation appointments available in the next 7 days

our specialties

Window & Door Replacement Services by NEXT Door & Window

Boosting Curb Appeal Since 2002

Specializing in Fiberglass Windows

Tired of warped frames and foggy glass? We install high-performance windows made from Ultrex® fiberglass, which is 8x stronger than vinyl and designed for serious longevity. With narrow frames and wide glass space, you get more natural light and better views with low-maintenance upkeep.

Stronger materials. Bigger views. Less maintenance.

Why Choose Next Door & Window

Over 24 Years of Experience

With more than two decades in the industry, we bring proven expertise and dependable service to every window and door project.

Dedicated Team of 80+ Professionals

Our team of over 80 window and door specialists is available six days a week, ready to assist you with prompt, reliable service when you need it most.

Certified Installers

Every installation is completed by trained, certified professionals to ensure precision, performance, and long-lasting results.

Top-Quality Products

We offer high-quality windows and doors designed for durability, style, energy efficiency, and lasting value.

Get the Windows & Doors Your Home Deserves

Our Products

Make a Statement

Showroom-Worthy Windows & Doors

Windows

SPECIALTY SHAPE

Picture

Corner

Sliding

Double Hung

Casement

Bow

Bay

Awning

See the Difference

Before and After

Outdated windows and doors diminish your home’s appearance, comfort, and value. Scroll through our before-and-after gallery to see how real customers upgraded their homes with custom-fit solutions from NEXT.

reviews

Why Your Neighbors Trust Us

Our satisfied customers say it best and keep coming back. Over 50% of our business comes from referrals and returning customers like you.

Gave us great suggestions on window replacements. We love the picture windows and other suggestions he made. He is very knowledgeable and came to our house during the installation to make sure all was going well and we were happy with the windows and installation.

The installers were very skilled and knowledgeable. In my Family Room, the installer even took it upon himself to level the wood shelf under the window he was installing so the wood framing the window would be even and “look nice“ as he said. He didn’t have to put in that extra effort, but he did…he took great pride in his work.

Next Door & Window worked within my schedule and timelines. They are very professional. And Scott the salesperson inspected the installers work to make sure they were doing what they were supposed to. I have nothing bad to say about them.

Very professional, I enjoyed visiting the showroom and being showed around the shop to see how they prepare the windows for installation, and of course meeting those who run the show!

Next Door & Window is a breeze to work with! The sales rep in Madison is very professional and knowledgeable on the product they carry, while not being so pushy like other companies. Would highly recommend this company to anyone searching for quality doors or windows that want the job done right.

Next Door and Window did an excellent job in the delivery and installation of our new sliding glass patio door. It adds an entirely new dimension to our home. The installer was prompt, efficient, courteous, and meticulous. We couldn't have made a better choice in the product or the company. I highly recommend them.

From the salesman to the installers we have had an excellent experience! We had our house windows and doors replaced in three phases. Each time the professional workmanship was outstanding. By the time they were finished each time, everything was clean and as if the doors and windows were always there.

Upgrade your windows, upgrade your space

Bow Windows

Bow windows extend outward in a gentle curve to maximize the Wisconsin sunlight, widen your view, and enhance your home’s architectural charm. Our team specializes in custom-fit bow window installations that improve comfort and efficiency from day one.

More light, less energy loss.

BAY Windows

Bay windows add depth, beauty, and extra room for seating or storage, while improving airflow and home insulation. NEXT installs full-frame bay windows in Madison for a clean, seamless look that’s built to last.

Create a comfortable space with exceptional style.

Casement Windows

Casement windows swing open with a simple crank and lock tightly to prevent those Wisconsin drafts. Our energy-efficient designs come in wood/clad or fiberglass and are installed with precision to keep your home secure and comfortable.

Easy to open, hard for weather to break in.

Double Hung Windows

Double-hung windows blend timeless design with cutting-edge performance. Both sashes tilt in for easy cleaning, and their superior construction keeps the Wisconsin air where it belongs: outside.

Classic design, modern comfort.

Slider Windows

Fighting with windows that stick or won’t slide properly? Slider windows glide effortlessly on a track, making them an excellent fit for tight spaces like kitchens, basements, or laundry rooms. NEXT installs sliders in Madison and the surrounding area that feature top manufacturer warranties and our 5-year labor guarantee.

Where form meets function.