Emergency Egress Windows: Installation, Code Requirements and Costs for NJ, PA, DE and MD Homeowners

What Is an Emergency Egress Window and When Is One Required?

An emergency egress window is required by the International Residential Code in any basement bedroom, finished living space, or habitable room located below grade. IRC Section R310 defines the trigger clearly: if your basement contains a sleeping room, that room must have its own emergency escape and rescue opening. If the finished basement space does not adjoin a bedroom with a compliant exit, it too requires one. Standard basement hopper windows – the narrow, single-pane units common in homes built before 1990 – do not meet modern egress size requirements and cannot substitute for a code-compliant egress window. As of 2025, the NJ Department of Community Affairs and the Pennsylvania Department of Labor and Industry both enforce IRC R310 minimums for new construction and permitted basement finishing projects.

What Are the IRC Code Requirements for Emergency Egress Windows?

IRC Section R310 sets the following minimum requirements for basement emergency egress windows, which New Jersey, Pennsylvania, Delaware, Maryland, and New York all adopt as baseline code:

• Minimum net clear opening area: 5.7 square feet 
• Minimum opening height: 24 inches 
• Minimum opening width: 20 inches 
• Maximum sill height: 44 inches above the finished floor 
• Operation: must open from inside without keys, tools or special knowledge

When an egress window is installed below grade – as is the case for nearly all basement installations – a window well is also required. The window well must provide a minimum horizontal area of 9 square feet with at least 36 inches of clearance between the window and the back wall of the well. Window wells deeper than 44 inches require a permanently affixed ladder or steps. Egress Solutions provides technical permit documentation for every installation at no additional charge, including dimensional compliance drawings required by most NJ and PA municipalities.

What Does an Emergency Egress Window System Include?

A complete emergency egress window system from Egress Solutions includes five components, each required for code compliance and long-term performance.

• The egress window itself is a vinyl-framed, weather-stripped casement, single-hung or tilt-and-turn unit engineered to meet the IRC 5.7 square foot net clear opening requirement. Egress Solutions carries window configurations with one-hand operation for fast exit, double-weather-stripped sashes for weather resistance, and double-pane glass for energy performance.
• The window well is a below-grade enclosure that holds back soil, provides the required clearance for the window to open fully, and creates the escape path required by code. Egress Solutions installs RockWell fiberglass composite wells and Boman Kemp galvanized steel wells in a range of sizes and finishes.
• The window well cover is a polycarbonate lid that keeps debris, water and animals out of the well while remaining easy to push open from below in an emergency. Premium covers are UV-coated and rated to support 500 pounds of load.
• The window well grate is a rolled angle iron steel safety grate that prevents accidental fall-ins from the exterior while allowing ventilation and natural light through. Boman Kemp grates are rated to 600 pounds and available in mesh or bar patterns.
• The egress ladder is required by IRC for any window well exceeding 44 inches in depth. Egress Solutions installs permanently affixed steel ladder systems with inside widths of at least 12 inches and rung spacing compliant with IRC Section R310.

What Brands Does Egress Solutions Install?

Egress Solutions is an authorized distributor and installer for three manufacturers that together represent the most widely specified emergency egress window systems in the Mid-Atlantic and Northeast.

• Boman Kemp produces complete basement window systems – the Easy Buck framing unit, Easy Well galvanized steel window well, vinyl egress window, safety grate, polycarbonate cover, and escape ladder – sold as an integrated system designed to meet IRC requirements out of the box. Boman Kemp is used in egress installations across NJ, PA, DE and MD for both retrofit and new construction projects.
• RockWell manufactures fiberglass composite window wells engineered to mimic the texture and appearance of natural stone. RockWell wells are available in gray and tan finishes, are lightweight relative to steel alternatives, and are paired with polycarbonate covers and aluminum grates rated to 500 pounds. RockWell's Denali series includes optional 3- and 4-rung egress ladders.

How Much Does Emergency Egress Window Installation Cost in NJ and PA?

Emergency egress window installation in New Jersey typically ranges from $3,500 to $10,000 per opening, with most complete installations – including excavation, concrete cutting, window, well, cover, grate, and drainage – falling between $7,000 and $12,000. Pennsylvania and Delaware projects fall within a comparable range. Several factors move the final number.

• Foundation type is the primary cost driver. Cutting through poured concrete walls requires more labor than cutting through concrete block or stone foundations. Poured concrete is the most common foundation type in homes built in NJ and PA after the 1960s.
• Excavation depth is the second major variable. Homes with deeper foundations require more soil removal, larger wells, and – in many cases – egress ladders, all of which add to the project cost.
• Drainage complexity varies by site. Properties with high water tables, particularly in South Jersey's coastal counties or Chester County, PA, may require more extensive drainage connections to existing weeping tile systems or sump pump lines.
• Building permits in NJ municipalities typically run $150 to $500. Egress Solutions includes permit documentation in every project at no additional cost to the homeowner.

Contact Egress Solutions for a project-specific estimate. Site conditions vary enough that ballpark figures are rarely accurate; a free on-site evaluation is the only reliable way to determine cost.

What Is the Installation Process and How Long Does It Take?

Emergency egress window installation through Egress Solutions’ partner installers is completed in a single day. The crew arrives with excavation equipment, concrete cutting tools, and the full window system. No return visits are needed. The sequence is as follows.

1. Excavation removes soil from the exterior of the foundation wall at the chosen window location. The excavated footprint is sized to accommodate the window well and drainage requirements for the specific site.
2. Concrete cutting opens the foundation wall using a diamond-blade concrete saw. The cut is made to the precise rough opening dimensions required by the window framing unit. Egress Solutions crews have completed this process in poured concrete, concrete block, and stone foundations throughout NJ, PA, DE, and MD.
3. Window and well installation sets the framing buck into the opening, installs the vinyl egress window, and positions the window well against the foundation. Drainage gravel is placed at the base of the well and connected to existing drainage where required.
4. Cover, grate, and ladder installation completes the system. The safety grate and polycarbonate cover are fitted to the well. If the well depth exceeds 44 inches, the egress ladder is permanently affixed at this stage.
5. Cleanup and inspection-ready handoff completes the day. Excavated soil is removed from the site. The installation is left ready for the municipal inspection that most NJ and PA jurisdictions require to close the permit.

Which Homeowners Need an Emergency Egress Window?

Emergency egress windows are most commonly installed in four situations, each of which Egress Solutions handles regularly across its NJ, PA, DE and MD service territory.

Homeowners finishing a basement for use as a bedroom, home office or living area trigger egress requirements under IRC R310 when the permit is pulled. A finished basement without a compliant emergency egress window will not pass final inspection.

Homeowners who have received a failed home inspection during a real estate transaction are among the most time-sensitive clients Egress Solutions serves. A non-compliant basement bedroom can delay or derail a sale. One-day installation makes it possible to close the deficiency quickly.

Homeowners adding a basement bedroom for a child, teenager or in-law create an occupancy that requires a dedicated emergency exit under code. An existing hopper window in the same room does not satisfy the requirement unless it meets IRC minimum dimensions – which most do not.

Homeowners who have finished basements already in use as living spaces and have never verified code compliance represent a large segment of egress installation work in NJ and PA. If a basement room is used as a bedroom and lacks a window meeting the 5.7 square foot net clear opening requirement, the space is not legally habitable and does not provide a safe secondary exit.

Egress Solutions serves residential and commercial clients throughout New Jersey, Eastern Pennsylvania, Delaware, Maryland’s Eastern Shore, and Southern New York  (distribution only). Request a free quote or call (856) 644-2967 to schedule a site evaluation.