How Much Does It Cost to Install a Single Replacement Window in Denver?

A single replacement window installed in Denver typically runs somewhere between $300 and $1,200, with most standard vinyl windows landing in the $400 to $700 range and premium materials like fiberglass or wood pushing higher.

The exact number depends on the window’s size, material, and how complicated the installation turns out to be once the old window comes out.

If you’re only dealing with one broken, drafty, or fogged-up window rather than a full-house project, the per-window math works a little differently than it does for a bulk replacement. Here’s what actually drives that single-window price.

Average Cost of a Single Window Installation in Denver

Basic vinyl windows generally run toward the lower end of that range, often in the $300 to $600 installed range for a standard size. Mid-range vinyl windows with upgraded energy features tend to fall between $500 and $900. Fiberglass and wood windows commonly run $700 to $1,500 per unit, and specialty shapes like bay, arched, or oversized picture windows can climb well beyond that depending on the complexity of the opening.

These numbers assume a straightforward replacement into an existing opening of the same size. Anything that changes the opening, whether it’s enlarging a window or converting one style to another, adds labor and materials on top of the base price.

What Affects the Price of One Window

Size is the biggest factor. A small bathroom window costs far less than a large living room window or a picture window, simply because of the material involved.

Material comes next. Vinyl is generally the most affordable option, fiberglass and wood cost more, and specialty glass packages, like triple-pane or Low-E coatings, add to the base price of any material.

Condition of the existing opening matters too. If there’s rot in the surrounding wood, water damage, or the opening needs to be resized, that adds labor hours a straightforward swap wouldn’t require. This is one of the more common surprises homeowners run into once a contractor actually opens up the wall.

Access also plays a role. A second-story window or one in a tight space takes longer to remove and install than a ground-floor window with clear access on both sides.

Is It Cheaper Per Window to Replace Just One, or Wait and Do Them All at Once?

Replacing windows in bulk almost always brings the per-window cost down, because a lot of the labor, scheduling, and overhead gets spread across more units. If you only need one window replaced right now, that’s still the right call, since living with a broken or failing window while you save up for a whole-house project rarely makes sense.

That said, if you know more windows will need replacing within the next year or two, it’s worth asking your contractor what a phased approach might look like, since some companies offer better per-unit pricing on a committed multi-window plan even if the work happens in stages.

Vinyl vs. Fiberglass Cost Differences for a Single Window

For a single window, the material choice makes a real difference in price. A standard vinyl window and a comparable fiberglass window of the same size can differ by several hundred dollars installed. That gap matters less when you’re only buying one window than when you’re multiplying it across fifteen or twenty, but it’s still worth factoring into your decision if budget is tight.

Hidden Costs to Budget For

Permit fees in Denver for a single window replacement are usually modest, often in the range of $35 to a few hundred dollars depending on scope, though a straightforward same-size replacement frequently doesn’t require one at all. Disposal of the old window typically adds a small flat fee. If the crew finds rot or water damage once the old window is out, repairing that framing before the new window goes in adds cost that is difficult to estimate until they actually see it.

A contractor who gives you a detailed, itemized estimate rather than a single lump number is doing you a favor here, since it makes it easier to see exactly what you’re paying for and where an unexpected repair might show up.

When a Single Window Replacement Makes Sense

A single-window replacement is the right move when one unit has failed, whether from fogging, cracking, warping, or a broken seal, and the rest of your windows are still in good shape. It’s also common after storm damage or an accident that affects just one window.

If you’re noticing early signs of failure in multiple windows around the house, even if only one has fully given out, it’s worth getting a broader assessment before committing to a one-off replacement. Sometimes what looks like an isolated problem is actually the first of several windows reaching the end of their service life around the same time.

Final Thoughts

If you’ve got one window that needs attention, we’re happy to take a look and give you a straight answer on cost, no upsell, no pressure. You can learn more about how we approach Denver window replacement projects of any size, from a single unit to a full-house upgrade.

Frequently Asked Questions