August 13, 2025 by WindowRama
Replacement Versus New Construction Windows
Replacement vs. new construction windows? This is one of the first decisions you’ll question when it’s time to upgrade the windows in your home. Although each option serves a different purpose, the right choice may not always be clear, as it will depend on the scope of your home improvement project.
What are replacement windows?
Replacement windows are designed to fit into the existing window frames in your home. They are installed without removing the exterior siding or altering the structure of the wall. Also known as “retrofit windows,” replacement windows are a popular, cost-effective solution for improving comfort, appearance, and energy efficiency in your home—especially if structural changes are not needed.
When to use replacement windows
Not every home is the same. Likewise, not every home improvement project is the same. Here is a guideline as to when you should choose replacement windows:
You’re using new construction windows with detachable nail fins.
- Your existing window frames are still in good condition (i.e., they have not rotted or been damaged).
- You’re upgrading for energy efficiency or style but not changing the size or shape of the window opening.
- You want a quicker, less invasive installation and have no need to remove exterior siding or disturb interior walls.
- You’re doing a window upgrade in an existing home without full-scale remodeling.
What are new construction windows?
New construction windows are designed for installation in newly built homes, fresh spaces, or during major renovations where the wall framing is exposed. These windows include a nail fin that attaches directly to the wall studs, making them ideal for projects that involve building from the ground up and spaces without exterior cladding (e.g., brick, siding, stucco, or trim).
When to use new construction windows
New construction windows should be chosen if you are:
- Building a new home or addition.
- Doing a full renovation or remodel that involves removing wall coverings or replacing damaged framing.
- Planning to resize or relocate windows for a completely new look or function
What are the key differences between replacement and new construction windows?
The major differences between replacement and new construction windows are largely the cost, the complexity of the installation, and the time it takes to install.
Costs
Window replacement is not cheap. There are key cost considerations, however, to keep in mind when deciding on replacement vs. new construction windows. These include project type, home condition, and long-term value. Here is an average breakdown of each:
Total average cost of replacement windows: $450–$1,200 per window
- Window cost: $300–$800 per window (standard models)
- Installation cost: $150–$400 per window
Installation is less labor-intensive, which makes replacement windows a more budget-friendly option.
Total average cost of new construction windows: $550–$1,500+ per window
- Window cost: $250–$750 per window (price is close that of replacement windows)
- Installation cost: $300–$700+ per window
While the window itself may be priced similarly, the labor and prep work are more involved, which accounts for the higher installation cost.
Project complexity
When it comes to window installation, the level of project complexity can vary greatly, depending on whether you’re choosing replacement windows or new construction windows.
Replacement windows offer faster and easier installation because it does not require the use of any framing or additional trim work. Conversely, when a new construction window is installed, they require the full installation of window frames and nail fins. They can be seen as a complete window refresh which comes with several key benefits, but also means more labor involved.
When it comes to energy efficiency – with new construction windows the frames are replaced, which can offer a tighter, and more energy-efficient seal than the existing frames. This also means that during the installation there are more customization options available, meaning you can install a window with any shape, size, or style.
Replacement windows will utilize the existing frames meaning that any gaps will remain, but the installation process is significantly faster and less intrusive.
| Replacement Windows | New Construction Windows |
|---|---|
| Easier Installation using existing frames | Requires siding and trim removal and new frames |
| Lower cost | Higher cost due to labor |
| Requires same style windows | Can customized and change the size and look |
| Existing frame gaps, if any, remain and may have lower energy efficiency | New frames provide a tighter seal |
Why replace your windows?
Outdated, drafty windows are costing you more than you think. From rising energy bills to reduced comfort, every draft is equal to throwing money out the window. According to the US Department of Energy (DOE), it is estimated that homes can lose up to 30 percent of their heating and cooling through poorly constructed or installed windows.
At WindowRama, our experts will help you choose the right windows for your home, project, and budget—without the guesswork. We look forward to welcoming you to one of our beautiful showrooms and guiding you through the process. Contact us today to explore our wide range of options that will not only make your house more energy efficient but also maximize its value!