Boman Kemp egress window systems: what they are and what they cost installed here

Boman Kemp systems come up constantly in egress conversations because they solve the part of the job most people have not thought about: making the window, the buck, and the well work as one assembly instead of three separately sourced parts that meet in your foundation. In Sioux Falls we install them, and we also install plain galvanized wells with good windows, and the honest answer about which you want depends on the house and the budget rather than on brand loyalty.

What the system actually is

The kit approach pairs a steel buck frame that goes into the cut opening, an egress-sized window that fits it, a well sized to the opening, and an integrated step system in the well. The value is in the interfaces. In a conventional install, the buck, the window, and the well are three purchases and the crew makes them agree on site. In a kit, they already agree, which removes a category of detail errors around flashing, sill height, and the relationship between the window opening and the well projection.

For new construction the buck can be set before the pour, which produces the cleanest possible result: a formed opening with no cutting at all. For a retrofit into an existing Sioux Falls basement, the opening is cut the usual way and the buck is set into it.

Where it earns its money here

• Deep wells. Our basements are deep because footings go below a roughly 42-inch frost line, so egress wells over 44 inches are the norm rather than the exception, and a well with a proper integrated step system is meaningfully better than a bolt-on ladder in a corrugated well.
• Finished basements. If you are cutting into a room that is already finished, the buck detail and the flashing matter, because water anywhere near a finished wall is a much more expensive mistake than water in a utility space.
• Tall wells on sloped lots. Where the well has to be tall and hold back soil, the engineered options are stiffer than light-gauge corrugated steel.

Where a plain steel well is the better buy

If the well will be shallow, if the basement is unfinished, or if the goal is simply to get a non-conforming bedroom into compliance at the lowest honest cost, a galvanized corrugated well with a genuine gravel drainage column will do the job for less. The thing that determines whether a well lasts around here is almost never the brand on the flange. It is whether there is a functioning drainage bed underneath it, which is why the flooding well page exists and why every replacement we quote includes rebuilding that bed.

Pricing in this market

These sit inside the ranges on the pricing page, which is where the itemized breakdown lives. Permits of $150–$600 are separate and passed through at cost.

What we will not tell you

We are not a dealer and we do not get paid more for steering you to one product. If a quote you have from someone else specifies a kit system and the price is fair, that is a fine job. If a quote specifies the cheapest possible well but includes a real gravel column, a compliant ladder, and a proper header, that is also a fine job. The bids that should worry you are the ones that skip the header, the gravel, or the permit, regardless of what brand appears on the invoice.

Get a number for your house

The egress cost calculator prices both paths in about a minute, and the free on-site measure confirms it. We install across Sioux Falls, Brandon, Harrisburg, Tea, Hartford, Dell Rapids, and out to Canton and Lennox.