Egress Window Installation in Madison, WI
If you are finishing a basement and want to add a bedroom, you need an egress window. It is not optional. Wisconsin state code requires one in every basement sleeping room, and the City of Madison enforces it. DS3 Solutions handles the full installation: cutting the foundation wall, excavating the window well, installing the window, waterproofing the opening, and getting it done to code.
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Wisconsin Code Is Clear on This
Under Wisconsin Administrative Code SPS 321.03, every basement bedroom must have at least one egress window. The code exists so that someone sleeping in a basement has a way out in a fire or emergency when the stairway is blocked. If you finish a basement bedroom without one, it does not pass inspection, it cannot legally be called a bedroom, and it becomes a problem when you go to sell the house.
We install egress windows for homeowners throughout Madison, Middleton, Sun Prairie, Verona, Cottage Grove, and across Dane County. A lot of the calls we get are from people who bought an older home with a finished basement that never had a proper egress window put in. We handle those too.
What the Window Has to Meet
Here are the minimum specifications under Wisconsin code. The window must meet all of these to pass inspection.
| Minimum net clear opening | 5.7 sq ft (5.0 sq ft for grade-level openings) |
| Minimum clear height | 24 inches |
| Minimum clear width | 20 inches |
| Maximum sill height | 44 inches above the finished floor |
| Window well depth | At least 36 inches from the foundation wall |
| Window well depth | Required if the well bottom is more than 46 inches below grade |
| Operation | Must open from the inside without tools or a key |
| Madison requirement | Low-E glass and proper insulation typically required for energy compliance |
Note: Requirements can vary by municipality. Always confirm with your local building department before starting. For City of Madison permit information, visit the Madison Development Services Center.
Full Installation From Start to Finish
Most homeowners do not realize how much goes into an egress window installation. It is not just cutting a hole and dropping in a window. Here is what we do on every job.
Foundation wall cut. We cut through the foundation wall at the correct size for the window opening. The cut location and height matter for code compliance and we measure twice before we start.
Excavation. We dig out the window well on the exterior to the required depth and width. Dane County's clay soils require proper excavation and backfill so the well drains correctly and does not hold water against the foundation.
Window well installation. We install a properly sized window well with drainage at the base. If the well depth requires it under Wisconsin code, we install a ladder as well.
Window installation. We install a code-compliant egress window sized to meet Wisconsin's minimum opening requirements. In Madison, we use low-E glass to meet the city's energy compliance requirements.
Waterproofing the opening. This is where a lot of installations go wrong. The cut in the foundation wall is a potential water intrusion point. We waterproof the opening properly so you do not end up with a wet basement after the first hard rain.
Permit and inspection. We work within the permit process. A building permit is required for egress window installation in Madison and most Dane County municipalities. We will help you understand what is needed for your specific project.
We Do the Whole Job
A lot of window companies will install the window and leave the waterproofing, the well drainage, and the permit to you. We handle all of it. DS3 is a foundation and waterproofing contractor first. That means we know what happens to a foundation wall opening that is not waterproofed correctly, and we do not cut corners on it.
Foundation expertise.
We cut walls and work with concrete block and poured concrete foundations every day. We know how to do this without compromising the structural integrity of the wall.
Serving all of Dane County.
We work in Madison, Middleton, Fitchburg, Sun Prairie, Verona, Waunakee, McFarland, Monona, DeForest, Cottage Grove, and across South Central Wisconsin.
Code compliant.
We know Wisconsin's egress requirements and Madison's local energy compliance rules. The window will pass inspection.
Waterproofing built in.
Every egress installation we do includes proper waterproofing at the opening. It is part of the job, not an add-on.
Licensed and insured.
Wisconsin Contractor License 052300539-DC.
Egress Window Questions, Answered Straight
Do I need an egress window for a basement bedroom in Madison?
Yes. Under Wisconsin state code (SPS 321.03), every basement sleeping room must have at least one egress window. The City of Madison enforces this. Without it, the room cannot legally be called a bedroom and will not pass a building inspection.
What are the size requirements for an egress window in Wisconsin?
The window must have a minimum net clear opening of 5.7 square feet, at least 24 inches high, and at least 20 inches wide. The sill cannot be more than 44 inches above the finished floor. The window well must be at least 36 inches deep from the foundation wall. These are state minimums. Always confirm with your local building department.
How much does egress window installation cost in Madison?
Most residential egress window installations in the Madison area run between $3,500 and $7,500 depending on the foundation type, the depth of excavation needed, soil conditions, and whether a ladder is required in the well. Poured concrete foundations and block foundations require different tools and time. We provide free written estimates.
How long does it take?
Most jobs are completed in one to two days. We excavate, cut, install the window and well, and waterproof the opening. We will give you a specific timeline when we look at the project.
Will I need a permit?
Yes. A building permit is required for egress window installation in the City of Madison and most Dane County municipalities. We work within the permit process and can help you understand what your specific project requires before work starts.
My basement has a finished bedroom but no egress window. What do I do?
This is very common in older Madison area homes, especially those built in the 1950s through 1980s when basement bedrooms were finished without today's code requirements. Call us. We will come out, assess the wall and the exterior conditions, and give you a quote to bring it up to code. It is a straightforward fix and it protects your home's value.
Can you install an egress window in a block foundation?
Yes. We work in both poured concrete and concrete block foundations throughout the Madison area. Block requires different cutting tools and technique than poured concrete, but we do it regularly.
Related Services
Get a Free Estimate
If you are finishing a basement, adding a bedroom, or have a basement room that was never properly permitted, give us a call. We will come out, look at the wall and the exterior, and give you a straight answer on what the installation involves and what it costs.
Request a Free Estimate
We'll get back to you within one business day.
Contact Us
We will get back to you as soon as possible.
Please try again later.