What egress actually means
An egress window is an opening large enough for an occupant to climb out of, or for a firefighter to climb in through, in an emergency. The idea is simple: if someone is sleeping in a basement room and there is a fire, they need a way out that does not depend on getting through the rest of the house.
A small hopper window near the ceiling does not meet the requirement. Neither does a window that opens but sits too high off the floor to reach. The code is specific about size, height, and the window well outside.
What Nebraska's code requires
Nebraska's residential code is based on the 2018 International Residential Code. For a basement bedroom, the egress opening must meet all of these:
- Net clear opening of at least 5.7 square feet (5.0 square feet is allowed for grade-level or below-grade openings)
- At least 24 inches high
- At least 20 inches wide
- Sill no higher than 44 inches above the finished floor
The window well outside also has requirements:
- At least 9 square feet of clear floor area
- At least 36 inches out from the wall
- If the well is deeper than 44 inches, it needs a permanent ladder or steps built into it
Your city may have its own amendments to the state code, so confirming the local requirements before work starts is a good idea.
When you need a basement egress window
The clearest trigger is a new bedroom. If you are converting basement space into a room where someone will sleep, a code-compliant egress window is required. This applies whether you are building out a finished basement for the first time or converting an existing room that was used for something else.
Other situations where homeowners add egress windows:
- An existing basement bedroom that was finished before current code and lacks a proper exit
- A home being listed for sale where the basement bedroom needs to be legal to market it as such
- General safety, even in a space that is not a bedroom
Omaha sees heavy spring rain, with May the wettest month, and a long freeze season. A window well that is not properly sized or drained can collect water. A contractor will factor drainage into the installation, not just the opening size.
What the installation involves
Adding a basement egress window means cutting through the foundation wall, which is a structural task. A contractor will:
- Cut the concrete or block wall to the required opening size
- Install a properly sized window and frame
- Build or install the window well outside, with drainage at the base
- Add a ladder or steps if the well depth requires it
- Restore the interior and exterior finishes around the opening
The amount of excavation outside depends on how deep your foundation sits and the soil conditions. Omaha sits on loess, a fine wind-blown silt, with clay-rich subsoils, so a contractor familiar with local conditions will know what to expect.
Permits and choosing a contractor
A new egress window opening changes the foundation wall, and new egress windows usually need a city permit. A good contractor pulls it for you. If you are not sure about your city's process, check with your local building department.
Nebraska requires contractors to register with the Nebraska Department of Labor. You can search the registry at dol.nebraska.gov. Also check the BBB of the Midwest Plains and ask for references from recent projects. Get the full scope, including window specifications, well size, drainage plan, and permit responsibility, in writing before work begins.
Frequently asked questions
Does every basement window need to be egress size?
No. Only windows in rooms used or intended as sleeping rooms are required to meet egress standards. Other basement windows can be smaller. That said, some homeowners choose to upgrade additional windows for better light, ventilation, or resale clarity.
What about a basement egress window for a home I am selling?
If the listing describes a basement room as a bedroom, buyers and their agents will often ask whether the window meets egress requirements. A contractor can measure the existing opening and tell you whether it qualifies or what would need to change. This is worth sorting out before you are under contract.
Will cutting through the foundation wall cause structural problems?
Done correctly, no. A contractor will account for the structural load above the opening and install the appropriate header. This is one reason to make sure the person doing the work is experienced with foundation walls specifically, not just general window installation.
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