Egress Window for a Bedroom: Requirements, Impact Options and Real Cost

An egress window for a bedroom is a window that opens wide enough, low enough and easily enough for occupants to escape and for a firefighter to enter. Under the residential code used in Florida, that generally means a net clear opening of at least 5.7 square feet (5.0 at grade floor), at least 24 inches high and 20 inches wide, with the sill no more than 44 inches above the floor. In Southwest Florida, the practical cost runs from a standard impact window replacement up to a larger project when a block opening has to be enlarged.

We explain each requirement in detail in our pillar guide to egress window requirements in Florida. This article is about the project itself: when you need a new egress window, how it gets done in a Florida home and what it typically costs.

When Does a Bedroom Need a New Egress Window?

Homeowners usually run into egress in one of these situations:

• Converting a room to a bedroom, such as an office, den or garage, which brings the room under current rules. Our sibling article on legal bedroom requirements in Florida covers what else that involves.
• Building an addition with a new sleeping room.
• Replacing windows and changing style, for example from a horizontal slider to a single-hung, which can shrink the clear opening.
• Selling the house, when an inspector or appraiser questions whether a room counts as a bedroom.
• Safety, because the existing window is painted shut, barred without a release, or has a sill too high for a child or older adult to climb.

Basement egress windows and window wells dominate national articles on this topic, but they rarely apply here because Southwest Florida homes almost never have basements. Our work is at ground level or on a second floor, in block or frame walls.

Egress Window Requirements for a Bedroom: Quick Recap

These are the general minimums. Confirm with your city or county building department, because the department decides how the rules apply to your permit.

1. Net clear opening area: 5.7 sq ft (5.0 sq ft at grade floor).

2. Net clear height: 24 inches minimum.

3. Net clear width: 20 inches minimum.

4. Sill height: 44 inches maximum above the finished floor.

5. Operation: opens from inside without keys, tools or special knowledge.

Remember that these are clear-opening dimensions with the window fully open, not frame sizes. A single-hung window opens only its bottom sash, so it needs a taller frame than a casement to qualify.

Choosing an Impact Egress Window

Much of coastal Southwest Florida lies in the wind-borne debris region under the Florida Building Code, 8th Edition (2023), so bedroom windows need impact glass or approved shutters. An impact egress window solves both problems: it protects the opening during a storm and keeps the escape route usable, with nothing to remove from outside.

• Casement: meets egress in the smallest frame because the entire sash opens. Good for short walls. See our guide to vinyl casement windows for frame options.
• Single-hung: the most common replacement window here. Works for egress when the frame is tall enough for 24 inches clear and the area adds up to 5.7 sq ft.
• Horizontal slider: works where wall height is limited but width is available.

Ask your contractor to show you the manufacturer's egress chart for the exact model and the Florida Product Approval for the size being installed.

How an Egress Window Is Added in a Block Home

If the existing opening is big enough, an egress upgrade is a standard window replacement. If it is not, here is the typical sequence for enlarging a bedroom opening in a concrete block wall:

1. Measure and design. Confirm the new clear opening, sill height and window size against the manufacturer's chart.

2. Engineering and permit. Widening or lowering a block opening affects the lintel above and the wall's structure. Expect engineering and a building permit.

3. Cut the block. The opening is saw-cut to the new size. Lowering a sill is often simpler than widening, because widening usually means a longer lintel.

4. Lintel and framing. A properly sized lintel is installed or the existing one is verified, plus new bucks as the window installation requires.

5. Install the impact window per its product approval, with the specified anchors, sealant and flashing.

6. Patch stucco and drywall, then paint inside and out. Matching existing stucco texture is part of a quality job.

7. Final inspection.

In a wood-framed wall the process is similar, but a new header replaces the lintel work and the opening is usually quicker to modify.

How Much Does an Egress Window Cost?

Typical 2026 pricing in Southwest Florida, conservative ranges:

• Existing opening already large enough: the normal impact window range of $1,200–$3,800 per opening, depending on size, style and glass.
• Enlarging an opening in a block wall: typically $2,500 to $6,000 or more on top of the window, covering engineering, cutting, lintel work, stucco and paint repair, and permits. Unusual structure, plumbing or electrical in the wall raises the cost.
• Frame wall resizing: usually less than block, depending on the header and finish work.
• Room conversion: the window is one line in a bigger permit that may include smoke alarms, electrical and other items.

Getting the window right on the first order matters, because impact windows are custom-made and a unit that turns out to be too small for egress usually cannot be returned.

Common Mistakes to Avoid

• Ordering by frame size instead of checking the clear opening.
• Switching from a slider to a single-hung of the same size without re-checking egress.
• Installing security bars or fixed screens without inside release hardware.
• Forgetting fall protection on second-floor windows with low sills, which still must release for escape.
• Relying on accordion or panel shutters that occupants cannot open from inside during a storm.

Frequently Asked Questions

What are the egress window requirements for a bedroom?

In general: at least 5.7 sq ft of net clear opening (5.0 at grade floor), 24 inches clear height, 20 inches clear width, and a sill no higher than 44 inches, operable from inside without tools. Confirm with your building department.

How much does an egress window cost in Florida?

Typically $1,200–$3,800 per opening for an impact window that fits the existing opening. Enlarging a block opening typically adds $2,500 to $6,000 or more for engineering, cutting, lintel, stucco and permits.

Can an impact window be an egress window?

Yes. An impact window that meets the clear-opening and sill-height rules and opens normally from inside qualifies, and it keeps the escape route open during storm season.

Do I need a permit to add an egress window?

Yes in almost all cases. Window replacements in our area are permitted, and enlarging an opening is structural work that requires a permit and usually engineering.

Can a sliding glass door serve as bedroom egress?

Generally yes, if it opens directly to the outside and meets the clear-opening requirements. Confirm with your building department.

Bottom Line

A compliant egress window gives every bedroom a real way out. In Southwest Florida, choose an impact-rated unit sized from the manufacturer's egress chart, and budget for block cutting and lintel work if the opening is too small. Confirm requirements with your building department before ordering.

Need a bedroom window checked or resized? Prestigious Home Improvements installs impact windows and doors and builds home additions. Call (941) 223-4875 for a free in-home estimate.