How Much Do Glass Block Windows Cost?
How much does egress window installation cost? The honest answer depends on three things: what kind of opening your foundation already has, whether the window needs to meet bedroom egress requirements, and what kind of window well the dig calls for. Anyone who hands you a number before looking at your basement wall is guessing. This guide walks through what actually moves the price on glass block and egress window work in Minneapolis, and by the end you will know exactly how to get a real number for your house.
What Drives the Cost of Glass Block Windows
Every basement window job starts with the same question: what are we working with? These are the factors that decide where your project lands.
Existing Opening vs. New Cut
The single biggest driver is whether we are replacing a window in an existing opening or cutting a new one through your foundation. A basement window replacement in an opening that already exists is the simpler job. Cutting concrete or block foundation to create a code-compliant egress opening means saw work, structural framing, and more labor hours. You can tell which side you are on by looking at your wall: if there is already a window roughly where you want one, and it is close to the required size, you are on the lower end. If the wall is solid, budget for the bigger job. The scope of an egress window installation cost is set largely by whether this cut is necessary.
Code Compliance and Bedroom Egress Requirements
A glass block window in a laundry room does not have to meet the same rules as a window in a basement bedroom. If you are finishing a basement and adding a bedroom, the bedroom egress requirement kicks in: the opening has to be large enough for a person to climb out and for a firefighter to climb in. Meeting that standard usually means a larger opening, a specific window style, and a compliant window well. If your project is a bedroom or a finished basement you plan to permit, expect the code-driven version of the job. If it is a utility space, a simpler glass block installation may be all you need.
Window Well Type and Depth
If the window sits below grade, it needs a window well. How deep that well goes and what it is made of both move the price. A shallow galvanized well on a walkout-side wall is a smaller dig. A deep well for a fully below-grade bedroom window means more excavation, more material, and often a drainage connection so the well does not fill with water. Walk outside and look at where the window will sit relative to the ground. The lower the window sill sits below grade, the deeper the well, and the more the job costs.
Soil, Frost Depth, and Site Access
Minneapolis soil and frost depth are not abstractions; they shape the dig. Frost here runs deep, which affects how wells are set and how drainage is graded so meltwater moves away from the foundation instead of into your basement. Site access matters too. A window on an open side yard where equipment can reach is a faster job than one behind a deck, a fence, or mature landscaping that has to be worked around. If a machine can get to the wall, the excavation goes faster and the price reflects it.
Window Type and Size
Glass block windows, standard basement window blocks, and full egress windows are different products at different price points. Glass block is a fixed, secure, light-admitting option that works well where egress is not required. An operable egress window costs more because it is bigger, it opens, and it has to meet size rules. Size matters within each type as well: a small basement window installation is less material and less labor than a full-size egress opening. Decide what the room needs to do, and the window type follows.
Number of Windows
One window carries all the setup: the site visit, the equipment, the excavation staging. A second or third window on the same visit shares that overhead. If you have two or three basement windows that need replacement, doing them together usually costs less per window than doing them one at a time over several years. Count your openings before you call, and get them all quoted at once even if you phase the work.
Cost Factor Table
| Factor | Pushes the price down when… | Pushes it up when… |
|---|---|---|
| Opening | An existing opening is close to the size you need | We cut a new opening through solid foundation |
| Code compliance | The room is a utility space with no egress requirement | The room is a bedroom that must meet egress rules |
| Window well | The well is shallow or not needed at all | The window sits well below grade and needs a deep well with drainage |
| Site access | Equipment can reach the wall from the yard | Decks, fences, or landscaping block access |
| Window type | A fixed glass block or standard basement window fits the need | A full-size operable egress window is required |
| Window count | Several windows are done in one visit | Each window is a separate project on a separate trip |
How to Get an Accurate Estimate for Glass Block Windows
You do not need to be an expert to get a solid quote. You need a few facts and a few photos.
Have this ready before you call any local installer:
- Photos of each window from inside and outside. Include the whole wall so the installer can see the foundation and the grade line.
- What the room is for. A bedroom triggers the bedroom egress requirement. A storage room does not. This one answer changes the scope more than anything else.
- A rough measurement of the existing opening, if there is one. Width and height is enough.
- A note on access. Is the window behind a deck, a fence, or an air conditioner? Say so up front.
A good quote should list the window itself, the cutting or opening work, the window well and its material, excavation and drainage grading, permits if the job needs them, and cleanup. If a quote is one line with one number, ask what it covers. Vague quotes turn into change orders.
Estimates differ between providers because scope assumptions differ. One contractor assumes a galvanized well; another assumes a composite one. One includes the permit; another leaves it to you. Additionally, one has actually worked in Minneapolis clay and priced the dig honestly; another quotes off a photo and adjusts later. When you compare quotes, compare what each one includes, not just the bottom line.
We give free quotes based on your actual wall, your actual grade, and your actual soil. That is the fastest path to a number you can budget around.
Ways to Keep the Cost Down
There is no coupon for concrete cutting, but there are real levers:
- Match the window to the room. If the space is not a bedroom, you may not need a full egress window. Glass block windows or standard basement window blocks can meet the need at lower cost. Do not pay for egress compliance a laundry room does not require.
- Bundle windows into one visit. Excavation setup and site work are shared costs. Two windows on one trip beat two separate projects.
- Clear the access yourself. Move the grill, trim the shrubs, take down the removable fence panel. Every obstacle the crew works around is time on your invoice.
- Fix drainage before it fixes you. A window well that holds water rots frames, leaks into the finished basement, and turns a replacement into a repair-plus-replacement. Keep wells free of leaves, and make sure downspouts point away from them.
- Get two or three quotes with matching scope. Not to grind anyone down, but to spot the quote that quietly left out the well or the permit. The cheapest number is often the least complete one.
Cost Questions People Ask
How much does basement egress window installation cost compared to a simple replacement?
Cutting a new egress opening costs more than replacing a window in an existing opening, and the gap is meaningful. The egress job adds concrete cutting, a larger window, and usually a code-compliant window well with drainage. A replacement swaps the unit in a hole that already exists. Same wall, different project.
What does glass block window installation cost depend on?
Mostly the size of the opening, the condition of the existing frame, and how many windows you do at once. Glass block is a fixed unit, so there is no operable hardware and no egress sizing, which keeps it on the simpler end of basement window work. Get all your block windows quoted together for the best per-window number.
Do I need a permit, and does it add to the price?
If you are cutting a new opening or creating a bedroom egress window, plan on a permit and an inspection. The permit adds a fee and some paperwork, but it also documents that the window meets code, which matters when you sell the house. A quote should say who pulls the permit; make sure yours does.
Why do quotes for the same window vary so much?
Because they are rarely quotes for the same job. One includes the window well, drainage grading, and permit; another covers only the window and the cut. Some contractors price Minneapolis soil and frost depth from experience; others quote generic numbers and adjust on site. Line the quotes up item by item before you compare totals.
The Bottom Line
The price of a basement window project comes down to what your foundation already has, what code requires of the room, and what the well and dig demand. No page on the internet can tell you your number, but a free quote from a local installer who has seen your wall can. Gather your photos, decide what the room needs to do, and get two or three itemized quotes so you can compare real scope instead of guesses.
If you need basement egress window installation, Minneapolis Window Pros can help.
Prefer to talk it through? Call (612) 482-9787 — a quick call is usually the fastest way to get a straight answer for your situation.
