Basement Egress Window Basics
Why an egress window matters
As a contractor who's been in the trades for more than 15 years, I can't overstate two reasons homeowners add egress windows: safety and usability. An egress window gives you a safe exit in an emergency and lets you legally convert a basement area into a bedroom or livable space. Beyond code, it brings natural light and ventilation to otherwise dark rooms, which makes basements feel larger and more comfortable.
Where egress fits in Chester & Delaware County projects
Local municipalities in Chester and Delaware counties follow the International Residential Code with local amendments. That means many of the same rules apply here, but permit requirements and inspection scheduling vary by township. Before you plan layout or start digging, call your township building department. It will save you surprises down the line.
Basic code and practical dimensions to know
Building codes are specific: an emergency escape and rescue opening must provide a minimum net clear opening to allow someone to get through. A few practical numbers I use when quoting jobs (always confirm with your inspector): a net clear opening of about 5.7 square feet is commonly required, with minimum clear height and width limits, and the window sill typically no higher than 44 inches above the finished floor. Window wells also have minimum horizontal area requirements and often must be large enough to allow the window to open fully and for a person to climb out. If your well is deeper than about 44 inches, code usually requires a permanent ladder or steps.
Why you should verify numbers
Codes change and local interpretations vary. I always tell clients: use the numbers above as a planning guide, then confirm with your township and let your contractor pull permits. Craftsworth Construction handles permitting in Chester and Delaware County regularly and can coordinate inspections so your egress window project is code-compliant.
Types of egress windows and styles
Not all windows are equal for egress. Common choices for basements include:
- Casement windows – swing open like a door and give large clear openings. Great for tight wells because a crank opens the sash fully.
- Double-hung or single-hung – can work if they meet the net clear opening requirement, but topping out the clear opening often requires larger sash sizes.
- Sliding windows – horizontally sliding windows can meet egress if the opening is large enough.
When choosing, think about how the window opens with the well in place, and pick glazing with good insulating value (low-E, argon fill) for energy efficiency in our PA climate.
Window wells—more than a hole in the ground
A well is required when the egress window opening falls below grade. Practically speaking, a well must let you open the window fully and provide a clear escape path. That means adequate horizontal area, a drain to daylight or the basement perimeter drain, and often a well liner and cover. A tight, poorly drained well will fill with water, leaves, and ice—so we design wells with proper slope, a gravel sump, and a clear path to your home’s drain tile or a new sump pump if needed.
Waterproofing and drainage—don’t skimp
Cutting into a foundation is an opportunity to stop leaks. After cutting the opening, we inspect the footing and foundation wall, apply a waterproofing membrane, and tie the window well drainage into the foundation drain or install a dedicated drain to daylight or the sump pit. In Chester and Delaware County where we get concentrated rain and occasional freeze-thaw, integrating the egress well with a proper drainage plan prevents future moisture headaches.
Costs, timelines, and what affects the price
Expect a wide range depending on foundation type and site access. Typical ballpark numbers for the area are roughly $4,000–$10,000 for a standard egress window with a well and basic drainage. Cut into poured concrete or remove block walls increases cost; finished-basement interior repairs add more. A larger well, steel steps, or landscape restoration will also push the price up. Most installs take one to three days on-site, though permitting and inspections can add a few weeks to your calendar.
Practical steps to take before you start
- Measure where you want the window and check for utilities. Call Miss Utility in PA before digging.
- Talk to your township building department about egress requirements and submit plans if required.
- Choose a contractor experienced with foundation openings and local inspections—this is not a typical window contractor job.
- Decide on interior finishes, well covers (they keep leaves out), and whether you’ll want a ladder/steps or stone steps in the well.
Hiring the right contractor
Ask candidates for references of past egress installs and examples of how they handled waterproofing and drainage. Request written quotes that itemize foundation work, window unit, well, drainage, interior patching, and permits. At Craftsworth Construction we provide that level of detail and coordinate the township inspections; our on-site experience in Chester and Delaware County helps avoid surprises like unexpected rebar or buried utilities.
Maintenance tips after installation
Keep the well clear of debris and check the well drain each spring and fall. Make sure covers are intact, and test the window operation annually so it opens easily in case of emergency. In freezing weather, be mindful of how ice buildup around the well could affect egress—covers and slope away from the house help prevent that.
Final thoughts
If you’re planning to finish a basement or add a bedroom, an egress window is both a safety upgrade and a smart value-add for homes in Chester and Delaware counties. It's one of those projects where planning, proper waterproofing, and a knowledgeable contractor matter. If you want to talk specifics for your house—foundation type, soil conditions, or permit timelines—give me a call at Craftsworth Construction and I’ll walk you through the options based on what I’ve seen working in this area for the last decade and a half.
Matt Morton, Owner • Craftsworth Construction