Basement Windows

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Reliable Performance

Durable frames and insulated glass are built to withstand moisture, drafts, and pests.

Fast, Professional Installation

Custom-fit and sealed for your foundation opening — most projects finished in just one day.

Energy Efficiency

Well-insulated designs reduce drafts and keep your basement more comfortable year-round.

Custom Style Options

Choose from hopper, sliding, or glass block windows to match your home’s design and function.

Installed with

Not all basement windows are built the same. The windows we install are specifically designed to handle the challenges of below-grade spaces — where moisture, drafts, and security can all be concerns. Every unit we install comes with premium features that improve strength, efficiency, and convenience, so you can enjoy a basement that’s brighter, safer, and more comfortable year-round.

Insulated Glass for Efficiency & Quiet

Double- or triple-pane glass improves thermal performance and helps reduce outside noise for a more comfortable space.

Moisture‑Resistant Frames

Durable, weather-ready materials resist rust, rot, and warping — ideal for below-grade conditions.

Easy Operation

Smooth, reliable hardware makes windows effortless to open, close, and clean while maintaining a tight seal.

Custom Styles & Sizes

Choose hopper, slider, or glass block configurations with options to match your home’s look and basement needs.

Secure Locking Systems

Reinforced locks add peace of mind by improving basement security without sacrificing usability.

Precision Professional Installation

Each window is custom-measured, fitted, and sealed by our experts for a watertight, long-lasting finish.

Install with confidence

If your current windows are warped, rusted, or no longer sealing properly, replacement windows will protect your home and improve comfort. New basement windows are a smart choice if you want to:

  • Eliminate drafts, leaks, or condensation
  • Improve security and ventilation in your basement
  • Brighten dark spaces with natural light
  • Upgrade from outdated, inefficient windows
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Basement Window Installations

CT Cellar Doors installs high-quality basement windows across Connecticut and Southern Massachusetts, giving homeowners durable, energy-efficient solutions that improve comfort, security, and natural light.