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*The Angi rating for Egress Window Service companies in Lancaster, SC is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Egress Window Service needs.

*The HomeAdvisor rating for Egress Window Service companies in Lancaster, SC is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Egress Window Service needs.

Last update on November 21, 2025

Top-Rated Egress window pros in Lancaster - Updated Nov 2026

Egress Windows FAQs, answered by experts

Yes, you absolutely need a permit to add a window to your house. Your contractor can likely obtain this permit on your behalf. Ask about this when getting quotes from multiple window contractors.

Because egress windows are meant for emergency exiting and entering, they need to be an accessible size. The smallest an egress window is allowed to be is 15 inches in width and height, with an opening of around 4 square feet.

An egress window is similar to a regular window. However, this type of window opens fully to allow people to escape the home or rescue personnel to enter the home if an emergency occurs. Egress windows are required in all finished basements before they can be considered a living space.

The average cost to install an egress window is approximately $3,900, with a typical range between $2,500 and $5,300, though costs can be higher. The final price is influenced by several factors, including the window's size, type, material, and glass quality. Other variables include labor costs, location, excavation needs, and whether permits or a structural engineer consultation are required. The price of the window itself often depends on the number of panes:

  • Single-pane: $100–$400

  • Double-pane: $200–$500

  • Triple-pane: $300–$800

Additional features like window wells or covers will also increase the total project cost. It is advisable to obtain multiple quotes from professionals to get a comprehensive understanding of the expenses for your specific project.

A good U-factor for windows is 0.30 or lower, but they can range from 0.20 to 1.20. A general rule of thumb when it comes to the U-factor is that the lower, the better.

The Lancaster, SC homeowners’ guide to egress window services

From average costs to expert advice, get all the answers you need to get your job done.

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