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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
106 neighbors recently requested a quote
Recommended by88%of homeowners
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Egress Windows questions, answered by experts

DIY is possible for experienced individuals. Professional installation ensures compliance with building codes and proper sealing.

Installing a window well costs anywhere from $500 to $1,500 or more. Adding an egress window and well runs about $3,900 on average. Adding a window well cover to the project can add $200 to $700. A well cover helps protect your egress windows from weather damage and keeps them clear of dirt, debris, and wildlife.

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.

Yes, you can always make an existing window bigger, but the job complexity varies widely depending on the location of the window and the framing around it. Exterior walls are always load-bearing, so making windows wider will require structural changes that make for a more complex but doable project. Making windows taller often won’t require structural changes.

Yes, you can install a bay window in an existing house. You’ll need to have a structural engineer draw up plans to add the necessary support to your exterior load-bearing walls and a general contractor to make the changes to the framing around the new wall opening. This will cost an average of $3,000. After that work is done, a window installer can set the new bay window in place.

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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