Fort Collins Egress Windows Concrete Cutting for Foundation Openings in Fort Collins
Concrete cutting is the part of an egress job that turns a foundation wall into an opening: diamond-blade wet sawing for poured walls, course-by-course removal for block. In Fort Collins the cutting portion runs $1,000 to $2,500 for a window opening and $2,000 to $4,000 for a walkout door opening, always under a permit and always with the Colorado engineer’s letter the city requires before a foundation wall is altered. Most people buy it inside a full egress window installation; this page is for anyone who wants to know what the cut actually involves, or who needs an opening for a door or a window someone else is supplying.
The city’s rule, first
The City of Fort Collins Emergency Escape and Rescue Windows guide states: for new or altered windows in foundation walls, submit a letter or drawings evaluated or designed and stamped by a Colorado licensed engineer. The city’s Residential Basement Finish Guide repeats it for “installation of a new window in an existing foundation wall, or altering a foundation wall.” The city also lists cut-ins for new windows or doors as permitted work.
So the sequence is fixed: engineer, permit, then saw. The engineer’s letter ($300 to $700, passed through at cost) sizes the header that carries the wall over the hole. On a foundation you cannot “see how it goes.” Undersized or missing headers are the classic cheap-install failure, and they are invisible once the buck and drywall go in, which is why the inspection exists.
Poured walls
Most Fort Collins homes built in the last several decades have poured concrete foundations. The cut is made from outside after the well area is excavated, with a wall saw or a handheld diamond blade run wet, along lines laid out from the engineer’s drawing and the specific window unit. A clean, plumb cut with no overcuts at the corners is the goal, because an overcut past the corner is a crack starter in a wall that has expansive clay behind it. The slab comes out in one or two pieces and is hauled.
Block walls
Block foundations come out course by course. The cores are broken, the block is removed, and the jambs are cleaned and squared. The header and buck detail on block takes more care because there is less solid material to anchor to, and the engineer’s letter addresses that.
Older and mixed walls
The city’s historic districts run from the 1870s through the 1930s, and the residential streets around them hold houses whose foundations may be stone, brick, early poured concrete, or a mix. Those walls get evaluated before anything is planned. Sometimes the engineer says yes with a bigger header; sometimes the honest answer is that a different wall is the better place for the opening. The free on-site measure is where that gets settled, with a tape and a hammer rather than a guess.
What happens on cut day
- Utility locates are done before the excavation, via Colorado 811.
- The well area is dug to below the new sill, typically 5 to 6 feet on a full egress opening, respecting the 30 inch frost depth and leaving room for the drainage column.
- Inside, the wall is laid out against joists, wiring, and plumbing, and the room is sealed with plastic.
- The cut. Poured: wet-sawn, slab removed. Block: course by course.
- Header and buck. The engineered header goes in, and a pressure-treated buck frame is anchored to the concrete.
- Clean-up. Slurry contained and hauled, dust vacuumed, the basement left usable.
From there the job continues with the window, the well, and the drainage.
Door openings and walkouts
A walkout or egress door opening is the same trade at larger scale: taller cut, more wall carried by the header, a bigger dig with a landing outside, and drainage at the threshold that has to work on clay that does not percolate. The city’s basement finish guide notes that a basement without bedrooms needs a single escape opening, which can be an exterior door or a window, so a walkout door can serve as that opening where the grade allows. Door openings are quoted after the measure, $2,000 to $4,000 for the cutting portion.
Outside Fort Collins city limits
Unincorporated Larimer County runs its own permit under the county’s 2024 codes, effective January 1, 2026, with the same 30 inch frost depth stated countywide. One trap: the county says residential and commercial permits cannot be applied for online and must be submitted on paper using the county’s forms; its online portal takes only miscellaneous, utility, and solar permits. We hand-carry the application. The county’s own list of permitted work includes renovations such as basement finishes and room alterations, and replacing a window with one the same size or smaller needs no county permit, which is exactly the line between a swap and a cut. Each town has its own office, covered on the permits page.
Season
Cutting happens after the dig, and the dig happens when the ground is open. The NOAA normals for the CSU campus station put the median last spring freeze on May 1 and the first fall freeze on October 6, with 55.8 inches of snow a year. Excavation and cutting run roughly April through mid-November. Winter is when the engineer’s letter gets written and the permit gets filed, so the saw is on the wall the week the ground allows it. Interior-only cuts on a walkout wall that is already exposed are the exception and can run in any month.
Pricing
| Scope | Typical range |
|---|---|
| Window opening, poured wall | $1,200 to $2,500 |
| Window opening, block wall | $1,000 to $2,200 |
| Door opening, poured or block | $2,000 to $4,000 |
| Engineer’s letter | $300 to $700 at cost |
| Permit, City of Fort Collins | $150 to $300 typical, at cost |
These are the cutting and framing portions only and match the pricing page. Colorado labor and the mandatory engineering put these a notch above the same work in the upper Midwest.
When not to cut
If the existing opening is close, an enlargement is cheaper than a fresh cut. Fort Collins has required 5.7 square feet, 24 by 20 inches, and a 44 inch sill since December 1977, so a lot of houses from the 1980s onward only need a sill drop or well work. And if the goal is a bedroom, remember the city’s own line: the window does not create the legal bedroom, the basement finish permit does. The basement bedroom conversion page prices the whole project.
Send a photo of the wall from inside and the yard outside it. Free measure, flat quote, across Fort Collins, Loveland, and Berthoud.
Frequently Asked Questions
What does concrete cutting cost on its own?
$1,000 to $2,500 for an egress window opening and $2,000 to $4,000 for a walkout door opening, cut and removed, in a poured or block wall. That is the cutting portion only. On a full egress install it is folded into the $3,800 to $7,000 job price along with the engineer's letter, window, well, and drainage.
Do I need an engineer to cut my foundation in Fort Collins?
Yes. The city's Emergency Escape and Rescue Windows guide requires a letter or drawings stamped by a Colorado licensed engineer for new or altered windows in foundation walls, and the basement finish guide requires engineered plans for installing a new window in an existing foundation wall or altering one. No stamp, no permit, no cut.
Poured or block, which is harder?
Different, not harder. Poured walls are wet-sawn with a diamond blade and the slab of concrete is pulled out in one piece. Block walls come out course by course. Block often prices slightly lower to open; the header detail matters more than the cutting method on either.
How much dust and noise?
A few hours of loud sawing. Wet cutting keeps most of the dust down, we seal the work area inside with plastic, and the slurry is contained and hauled. One wall, one day.
Can you cut a door opening for a walkout?
Yes, where the grade and the wall allow it. A door opening is taller, carries more wall over it, and always needs the engineer's header design. The dig outside is bigger and drainage at the threshold is the detail that decides whether it stays dry.