Cost to Switch from Double Hung to Casement Windows: What You Need to Know

If you ask me, changing window styles during a remodel isn’t just about looks — it’s awning window won't close about function, cost, and where you put those new windows. After 25 years slinging windows for folks, I’ve seen plenty upgrade from double hung to casement, and trust me, it ain’t always straightforward.

Understanding the Costs: Window Replacement Cost Breakdown

First things first — the cost to switch from double hung to casement windows can vary depending on brand, materials, and labor. For instance, a standard vinyl casement window from brands like Andersen, Pella, Marvin, or Jeld-Wen typically runs around $450 to $600 per window, installed. To put that in perspective, replacing a double hung window with the same frame size and material might be closer to $350 to $500 each.

Window Type Brand Examples Material Typical Cost (Installed) Double Hung Andersen, Pella, Jeld-Wen Vinyl/Wood $350 - $500 Casement Marvin, Andersen, Pella Vinyl/Wood $450 - $600 Awning (For Comparison) Pella, Marvin Vinyl/Wood $500 - $650

So, what’s driving the cost difference? Casement windows are often more complex to manufacture — they have hinges, cranks, and tighter sealing mechanisms. That means higher material and labor costs when installed.

Changing Window Style and Remodeling Window Openings: What About the Frame?

Switching from double hung to casement doesn’t always mean simply swapping the sash and hardware. Sometimes the window opening itself needs remodeling. That can run upwards of several hundred dollars per window, depending on the complexity.

Here’s the deal: double hung windows slide up and down vertically, while casements swing out horizontally on hinges. That means the framing around the window opening might need adjustment to accommodate the new sash operation.

Adjusting rough opening size: Casement windows might require a slightly different opening size, especially if you’re upgrading to a larger or better-insulated unit. Structural considerations: You don’t want your casement window to swing out and hit something — or worse, block a walkway or patio space. A common mistake I see is installing casements where the sash opens into a narrow space, which leads to constant banged-up window edges or inconvenient door-blocking. Trim and flashing updates: New window styles often demand new exterior trim and flashing details — these are the water barriers that keep rot and leaks out.

The bottom line is, remodeling window openings adds cost and complexity beyond just the glass and frame.

Ventilation Differences and Airflow: Why Choose Casement Over Double Hung?

Ever wonder why casement windows are known for better ventilation? It’s simple physics. When you open a casement, the sash swings outward like a little wing catching the breeze and funneling air inside more effectively than double hung windows, which have to rely on the limited openings at the top or bottom.

Casement windows: open fully outward, offering maximum airflow and control. Double hung windows: usually only open halfway, sliding up or down, limiting airflow volume. Awning windows: hinged at the top and open outward — similar to casements, but generally smaller and better for tight spots.

This makes casements ideal for rooms that need fresh air circulation — kitchens, bathrooms, and living rooms facing prevailing winds. But keep in mind you’ll want easy access to the crank handle and room for the sash to swing out without obstructions.

Security and Locking Mechanisms: What Holds Up Best?

Now, about security — double hung windows have come a long way with multi-point locks, but casement windows usually offer superior locking methods. That’s because when you crank a casement closed, the sash compresses tightly against the frame, providing a tighter seal and extra resistance to forced entry.

Casement locks: typically cam locks that draw the sash tight all around the frame, improving both security and weather resistance. Double hung locks: often just sash locks coupling the two sashes, which can be less secure and less effective at stopping drafts.

So, if security and energy efficiency are priorities, casement windows hold an edge.

Ease of Cleaning and Maintenance: What Should You Expect?

Cleaning windows is a pain — no two ways about it. Double hung windows generally allow you to tilt the sashes in for cleaning from inside, which is a big plus if you have multiple floors. Casement windows, on the other hand, swing out — great for catching the wind but sometimes awkward for washing, especially on upper floors.

Brands like Andersen, Pella, and Marvin offer casement windows with removable sashes or special cleaning locks, but that usually comes at an added cost.

The maintenance angle also varies by material. Wood casements require regular painting or staining to hold up, but they’re more durable and repairable in the long run. Vinyl casements are easier maintenance-wise but tend to yellow and warp over time if you skimp on quality.

Tools and Tips for a Quality Installation

Installing casement windows properly is just as important as choosing the right style and product. Here’s the no-fluff rundown on the tools and steps that matter:

Level: You gotta get the window perfectly plumb and square. Casements are picky — an out-of-level frame and the sash won’t close right. Caulk gun: Sealing around the frame is everything. Skimp on caulk and you’ll regret drafts, leaks, and rot. Shims: Used to adjust the window within the rough opening so the sash swings smoothly without rubbing or gaps.

Pro tip: measure three times before ordering. You can’t fix a wrong-sized casement window without costly reorders and headaches.

Common Mistakes to Avoid When Switching from Double Hung to Casement

Here’s something I’ve seen WAY too often — home installers or homeowners picking a casement window without thinking about the sash swing path. If you put a casement near a walkway, porch, or narrow side yard, that sash will be an obstacle or even a hazard when open.

Makes sense, right? You want your window to open freely without knocking over potted plants, bumping passersby, or blocking doors.

Always visualize how the window swings out before buying. If space is tight, maybe an awning or top-hinged unit is better, or stick with a double hung.

So, What’s the Bottom Line?

Switching from double hung to casement windows offers benefits in ventilation, security, and sometimes energy efficiency, but comes at a higher price point and potential remodeling cost. You’ll pay about $100 to $150 more per window on average, plus possible frame modifications and trim work.

Brands like Andersen, Pella, Marvin, and Jeld-Wen provide solid options, blending quality with style, but don’t just pick the window you think looks cool. Think about your space, climate, and how the window behaves in daily life.

And remember: good installation makes or breaks that investment. Use the right tools — level, shims, caulk gun — and avoid the common pitfall of blocking walkways with an outward-swinging casement sash.

At the end of the day, if you measure right and plan your space, switching from double hung to casement can be a solid upgrade that lasts for decades.

Got questions? Hit me up — I’ve probably seen what you’re facing before.