Connecticut Window Installation Service Guide
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Egress window installation for basements

Turning a basement into a bedroom or livable space in Connecticut requires a code-compliant egress window, a window large enough for someone to escape through in an emergency and for firefighters to enter. This is a different job from swapping an existing window for a new one. It usually means cutting into the foundation, installing a window well outside, and adding a properly sized unit that meets local building code.

Because it involves structural cutting and often excavation for the well, this work typically requires a permit and inspection, and not every window company is set up to do foundation cutting alongside the window install itself.

  • Cutting a new opening into poured concrete or block foundation
  • Installing a window well with proper drainage outside the foundation
  • Meeting minimum size and sill height requirements set by code
  • Coordinating permits and inspections as part of a basement finishing project

If the basement renovation is part of a larger project, it helps to line up the egress window work early since it affects framing and drainage decisions elsewhere in the space.

What it costs

Cost is driven mainly by the foundation cutting and excavation for the window well, plus the size of window required to meet code. Permit fees, site access for equipment, and drainage work around the well all factor in. It's generally a bigger job than a standard window replacement because of the structural work involved.

Top 3 by our score

Ranked from our published scoring of public Google reviews for new construction window installation.

  1. 1. Best Glass LLC
    5.0★ · 183 reviews
    93
  2. 2. Renewal by Andersen
    4.8★ · 1070 reviews
    91
  3. 89

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FAQ

Is an egress window required for a basement bedroom in Connecticut?
Yes, most local building codes require an egress window or door in any room used as a bedroom, including finished basements.
How big does an egress window need to be?
Minimum opening dimensions and sill height are set by local building code, and an installer familiar with egress work can confirm the exact requirements for your town.
Do I need a permit for an egress window?
Yes, because it involves structural cutting into the foundation, a permit and inspection are typically required.
How long does egress window installation take?
It usually takes longer than a standard window swap because of the foundation cutting and window well installation, often a full day or more depending on site conditions.