When homeowners in the St. Louis area start planning a window replacement project, one of the first questions they ask is “How much do new windows cost?” The answer depends on several factors, including the size of the window, materials, glass type, and installation complexity.

At Viviano Windows, we help homeowners understand exactly what they’re paying for and what options make the most sense for their home and budget.

This guide breaks down typical window price ranges by size so you can better estimate the cost of your project.

What Affects Window Prices?

Before looking at sizes, it’s important to understand what factors influence window costs. Even two windows with the same dimensions can vary in price depending on several elements.

Common pricing factors include:

• Window size and shape

• Frame material (vinyl, fiberglass, wood, aluminum)

• Glass features such as Low-E coatings or gas fills

• Energy efficiency ratings

• Installation complexity

• Trim or structural repairs

• Local building codes

In the St. Louis region, climate considerations—like hot summers and cold winters—also make energy-efficient windows especially valuable.

“The right window isn’t just about size—it’s about choosing the right materials and energy performance for the St. Louis climate.”

Typical Window Prices by Size

Below is a general guide for common residential window sizes and price ranges, including both materials and professional installation.

Small Windows (Bathroom or Basement)

Typical size examples:

• 18″ × 24″

• 24″ × 24″

• 24″ × 36″

Typical price range:

• $300 – $700 per window installed

Small windows are often used in:

• Bathrooms

• Basements

• Laundry rooms

• Utility spaces

Because they use less material, they tend to be among the most affordable replacement options.

Medium Windows (Bedrooms and Offices)

Typical size examples:

• 30″ × 40″

• 32″ × 48″

• 36″ × 48″

Typical price range:

• $450 – $900 per window installed

These are some of the most common residential window sizes and are typically found in:

• Bedrooms

• Home offices

• Guest rooms

• Hallways

Energy-efficient upgrades such as Low-E glass or argon gas insulation may slightly increase the cost but can reduce heating and cooling bills.

Large Windows (Living Rooms and Main Areas)

Typical size examples:

• 48″ × 60″

• 60″ × 60″

• 72″ × 48″

Typical price range:

• $800 – $1,600 per window installed

Large windows are commonly used in:

• Living rooms

• Dining areas

• Front-facing rooms

• Scenic views

Because these windows use larger panes of glass and heavier frames, installation requires more labor and structural support.

Picture Windows and Specialty Sizes

Typical sizes:

• 72″ × 72″

• 96″ × 60″

• Custom architectural shapes

Typical price range:

• $1,200 – $3,500+ installed

Specialty windows include:

• Picture windows

• Arched windows

• Bay or bow windows

• Custom geometric designs

These windows often become focal points of a home, which means homeowners invest in higher-quality materials and glass options.

Additional Costs to Consider

While window size is important, some additional factors may impact the final price of a project.

Possible extra costs include:

• Structural frame repairs

• Replacing exterior trim

• Updating insulation

• Permit requirements

• Upgrading to energy-efficient glass packages

Homes built before 1978 may also require lead-safe work practices, which can slightly affect installation costs.

Average Window Replacement Cost for St. Louis Homes

For most homeowners in the St. Louis area, a full window replacement project typically falls within these ranges:

• Single window replacement: $400 – $1,200

• Whole-home replacement (10–15 windows): $5,000 – $18,000

• Premium custom installations: $20,000+

Working with an experienced installer helps ensure the project is completed efficiently, safely, and up to code.

Choosing the Right Windows for Your Home

When selecting replacement windows, consider the following priorities:

• Energy efficiency for the Midwest climate

• Window style that matches your home

• Durable frame materials

• Long-term maintenance requirements

• Professional installation quality

At Viviano Windows, we help St. Louis homeowners evaluate all of these factors so they can choose windows that deliver lasting performance and value.

Get a Window Quote in St. Louis

Every home is different, which means window prices can vary depending on the structure and materials used. The best way to determine the cost of your project is through a professional evaluation and quote.

A knowledgeable installer can:

• Measure each opening accurately

• Recommend energy-efficient options

• Identify potential structural issues

• Provide a clear project estimate

With the right guidance, replacing your windows can become a smart investment that improves comfort, energy efficiency, and home value.