Egress Window Inspection in Denver: What Inspectors Look For and How to Pass

Why Denver Homeowners Need to Pass an Egress Window Inspection

If you’ve recently installed an egress window in your Denver basement—whether as part of a bedroom conversion, a rental unit upgrade, or a safety retrofit—you already know the process doesn’t end when the concrete dust settles. The final hurdle is the official egress window inspection required by Denver Building Code. This inspection is your ticket to a signed-off permit, which is essential for legal occupancy, insurance compliance, and resale value.

Denver’s building department follows the 2021 International Residential Code (IRC) with local amendments, and inspectors are known for being thorough. They’ve seen every shortcut and every “close enough” attempt. The good news? Passing is straightforward when you know exactly what they’re measuring and why. Affordable Egress Co. has been navigating Denver inspections since 1999, and we’ve compiled the checklist that matters most for Front Range homeowners.

What Inspectors Look For: The 5 Non-Negotiables

Denver inspectors focus on five critical dimensions and safety features. Each one must be met exactly—no rounding up.

1. Net Clear Opening (NCO): The window must open to a minimum of 5.7 square feet (820 square inches) at the finished floor level. For grade-floor windows, the minimum drops to 5.0 square feet. Inspectors measure the actual opening, not the rough frame.
2. Height and Width: The clear opening must be at least 24 inches high and 20 inches wide. These are the minimums—larger is always better for egress.
3. Sill Height Above Floor: The bottom of the window opening (the sill) must be no more than 44 inches above the finished floor. If it’s higher, you’ll need a permanent step or platform.
4. Window Well Clearance: If the window is below grade, the well must project at least 36 inches from the window (horizontal clearance) and provide an area of at least 9 square feet. The bottom of the well must be at the same level as the window sill—no deeper or shallower.
5. Ladder or Steps: Any window well deeper than 44 inches requires a permanently affixed ladder or steps. The ladder must be non-climbable by small children (minimum 6-inch rung spacing) and extend from the well bottom to the top.

Denver also requires that the window be operational from the inside without tools, keys, or special knowledge. Double-check that your window opens smoothly and stays open on its own—a common fail point is a window that won’t stay in the open position.

Denver-Specific Gotchas: Soil, Weather, and Code Nuances

Denver isn’t a cookie-cutter market. Our unique conditions create inspection pitfalls that out-of-town contractors often miss.

Expansive clay soils: Much of the Denver metro sits on clay that swells when wet and shrinks during drought. This movement can shift window well walls, crack concrete, and misalign windows. Inspectors look for proper backfill and drainage around the well to prevent soil pressure from damaging the egress opening. Affordable Egress Co. uses compacted gravel and drainage fabric specifically chosen for Colorado clay.

Front Range weather: Our freeze-thaw cycles (often 50+ swings per winter) can heave window wells and crack concrete sills. Inspectors verify that the well is properly drained and that the window seal is weathertight. If you installed the window during summer, make sure the seal hasn’t dried and cracked by inspection time.

Denver’s “grade floor” exception: Many Denver basements have walk-out or look-out conditions. If your window is within 44 inches of exterior grade, the 5.0-square-foot minimum applies instead of 5.7. But inspectors measure from the finished floor inside to the exterior grade outside—a common misstep when homeowners assume a window is “at grade” when it’s actually 6 inches above.

How to Prepare for Your Inspection (And Avoid a Red Tag)

A “red tag” means the inspection failed, and you’ll need to schedule a re-inspection—often with additional fees and delays. Here’s how to walk in ready to pass.

• Clean the well: Remove leaves, dirt, construction debris, and standing water. Inspectors need to see the full well bottom and ladder.
• Test the window: Open and close it three times. Make sure it stays open without propping. Lubricate hinges if needed.
• Measure yourself: Use a tape measure to confirm the net clear opening. Write it down and compare to the 5.7 sq ft minimum. If you’re close, adjust the window stop or replace the sash.
• Check the ladder: Ensure it’s securely fastened and extends to the top of the well. Rungs must be straight and non-slip.
• Have your permit on hand: The inspector will want to see the approved plans and permit number. Keep them accessible.

If you’re unsure about any measurement, Affordable Egress Co. offers free pre-inspection walkthroughs. Our team knows exactly what Denver inspectors look for because we’ve been working with them since 1999. Most of our installations are completed in a single day, and we handle the entire process—from concrete cutting to window well installation to final sign-off.

When to Call a Pro: Signs Your Installation Might Fail

Even if you hired a contractor, mistakes happen. Watch for these red flags before your inspection date:

• The window feels tight or doesn’t open fully.
• The window well has standing water or rust stains.
• The ladder wobbles or is missing a rung.
• There’s a gap between the window frame and the concrete wall.
• The sill height is more than 44 inches from the floor (especially in older Denver homes with low ceilings).

If any of these apply, don’t risk a red tag. A quick fix now is far cheaper than a re-inspection fee and a delayed project. Affordable Egress Co. can often correct issues the same day—our one-day install model means we’re efficient with your time and your schedule.

Pass Your Inspection with Confidence

Denver’s egress window inspection isn’t something to fear—it’s a safety checkpoint that protects your family and your investment. By understanding what inspectors measure and preparing accordingly, you can walk into the inspection with confidence. And if you’d rather leave it to the experts who’ve been doing this since 1999, Affordable Egress Co. is ready to help. We offer free estimates and handle everything from concrete cutting to final sign-off, so you can turn that basement into a legal, safe, and comfortable living space. Contact us today to schedule your free estimate and get your project inspection-ready.