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*The Angi rating for Egress Window Service companies in Williston, 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.

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Last update on June 25, 2026

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Avatar for Groundworks
Groundworks
4.4(
341
)
Egress Window - Install

Serving Williston, SC and surrounding areas

Approved (Corporate)

In business since 1986

Free estimates

Emergency services offered

"Carnell & John were professional & efficient! Work was explained & questions answered."
Foundation
Foundation
Foundation
Foundation
Foundation

+13

Response time1 day
109 neighbors recently requested a quote
Recommended by88%of homeowners
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Egress Windows questions, 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.

New window installation costs range from $300 to $1,500 per window, depending on size, material, and energy efficiency features.

Yes, egress windows must meet local building codes for size and accessibility. Professional installers ensure compliance.

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.

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 Williston, 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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