Basement Egress Window Requirements in Eagle Mountain & Saratoga Springs

Egress requirements

The 2021 IRC (International Residential Code) is the main building code that Eagle Mountain and Saratoga Springs both adopt. Section R310 of that code covers emergency escape and rescue openings. These openings are called egress windows, designed specifically for people to be able to get in and out of them.

Every sleeping room below the fourth story, basement included, needs one operable opening that a person can climb out of unaided, and a firefighter with full gear can climb into. The specific required dimensions are:

The opening also has to be operable from inside the room without keys, tools, or special knowledge. So no bars, no security screens with hidden releases, no child-safety locks that require a key. All of those fail R310.

Window well floor area, projection, and ladder rules

The window well is the excavated area outside the egress window where someone climbing out can stand and find a clear path up to grade. Code requires a minimum 9 sq ft floor area with a minimum 36-inch projection from the foundation. In practice, a 3'×3' well meets the minimum requirements. However, most installers go a little larger, 4'×3' or 5'×3', because the cost difference is small and it is far more usable.

The most common materials used for these wells are: galvanized metal (cheapest, $200 to $600 installed), poured concrete (most durable, $1,000 to $2,000, used in tougher soil conditions), masonry block, and pre-formed composite. All meet code if dimensioned correctly. Metal is the dominant choice in Eagle Mountain because the clay soil holds shape well and metal installs fast.

Ladders are required whenever the well depth from grade to the well floor exceeds 44 inches. The ladder has to be at least 12 inches wide, project at least 3 inches from the wall, and support a person's weight. Most metal wells ship with integrated ladders. If yours is field-fabricating, put together on site, or poured concrete, the ladder is a separate install.

Casement vs slider vs double-hung — which to pick

Now, there are some variations to the specifications depending on the type of window you use.

A 24"×36" double-hung window (the kind where the lower pane slides up and the upper pane stays fixed) does not give you a 24"×36" opening. Half of that frame is the fixed upper sash, so when you raise the lower one the actual opening is about 24"×17.5". That's roughly 2.9 sq ft. Half of the minimum required by code. Slider windows have the same problem. When one panel is open, the other is fixed, so the clear opening is about half the nominal width.

Because of this, casement windows are the answer for most basements. A casement is a window that opens on a side hinge, like a small door. The whole frame swings outward, so the entire opening is clear. A 24"×48" casement gives you the full 24"×48" clear opening, which is 8 sq ft. Well above the 5.7 sq ft minimum.

So, you can use whichever window type you would like. Just make sure that the window opening itself meets the 5.7 sq ft minimum, not just the hole in the concrete.

Egress cost in Utah: retrofit vs during original finish

Egress window installation in Utah typically costs $3,000 to $7,500 per opening. The work includes cutting the existing foundation wall, framing the new opening, installing the window, excavating and installing the window well, and patching any disturbed exterior finish. The cost range is wide because it scales with foundation depth, the soil profile (clay versus rocky), whether the exterior excavation has to move landscape rock or sprinklers, and the well type.

Now, one thing to keep in mind is that retrofit (installing the egress window after the basement is already finished) runs $4,000 to $8,000, because the existing interior finish has to be opened up and repaired. Installing the same egress as part of the original basement finish runs $2,500 to $5,000, because the foundation work happens before any interior finish exists.

So if your basement plan has bedrooms that need egress added, do the work during the original finish. You save $1,500 to $3,000 per opening compared to retrofitting later. On a two-bedroom basement where neither has an existing egress, that's potentially $6,000 of savings.

• Original-finish egress (before drywall)$2,500 – $5,000
• Standard egress installation$3,000 – $7,500
• Retrofit in finished basement$4,000 – $8,000
• Window well (metal)$200 – $600
• Window well (poured concrete)$1,000 – $2,000
• Window well cover (recommended for Utah winters)$150 – $400
• Casement window unit, 36"×48" or similar$400 – $1,200

Selling a home with a non-conforming basement bedroom

This is a common issue that many homeowners run into. A previous owner finished the basement, framed in a bedroom, and either skipped the egress entirely or installed a window that doesn't actually meet R310. The current owner then inherits that liability.

In this situation, what happens is that at resale, the buyer's inspector flags the room, the appraiser notes it can't be counted as a bedroom for valuation, and the MLS listing has to call it a "den" or "non-conforming room" instead of a bedroom. Insurance carriers may decline to cover sleeping use in a non-conforming room.

To fix this, you would need to do a retrofit egress, the permit ($250 in Eagle Mountain), and an inspection. The cost would be the retrofit number from earlier, $4,000 to $8,000.

Now, why would you want to do this before selling the home? Well, the valuation impact at resale typically exceeds the retrofit cost, because a 4-bedroom home commands a meaningful premium over a 3-bedroom in Eagle Mountain's market. The math usually favors installing the egress before listing.

If you bought a home with an unpermitted finished basement and want to legalize it now, the city will require a permit and inspection. Eagle Mountain's permit process is here.

Winter care for Utah window wells

When installing a window well, be aware that Utah winters can pack the well with snow and ice, jamming the egress shut from the outside even while it's still operable from inside. Freeze-thaw cycles on the Wasatch Front can compact snow into ice that's hard to clear without breaking the well's cover or damaging the ladder.

Three practices reduce the risk:

• Clear plastic well covers ($150 to $400) installed at grade keep snow out of the well entirely. The cover has to be removable from inside the well (push-up style) so it doesn't defeat the purpose of the egress.
• Annual inspection in late fall to confirm the cover is intact, the well drains correctly, and the ladder is rust-free.
• Avoid placing the well right under a roofline where snow slides off. The impact can break a cover, and a sloped roof can fill a well in one storm.

Saratoga Springs tempered-glass note

Saratoga Springs's published basement permit guidance includes a detail Eagle Mountain doesn't call out as prominently: glass within 18 inches of the finished floor must be tempered. Tempered glass is just heat-treated safety glass. When it breaks, it crumbles into small pebbles instead of long sharp shards. The 44-inch maximum sill height already puts the bottom of the opening within reach, so any glass that extends below 18 inches of the floor (like a small panel below the operable section of the window) has to be the tempered kind. Cost difference between tempered and standard is small (10 to 20 percent), but ordering the wrong one means a re-order and a missed inspection.

Common questions about basement egress