Window Casing & Trim Installation in Charleston, SC

The window sill (also called a stool) is the horizontal piece that extends out from the bottom of the window, creating a small ledge. The apron is the trim piece installed directly below the sill against the wall. Together, they complete the bottom of the window surround and add substantial visual weight and architectural detail.

Absolutely. We install new window casings, sills, and aprons around your existing windows without disturbing the window itself. We carefully remove old trim, prepare the surface, and install new casings with proper reveals and tight joints. This is one of the most cost-effective upgrades for Charleston homes.

Charleston homes vary widely in style. For historic downtown Charleston homes, we often use period-appropriate profiles with backband details. For Lowcountry traditional homes, craftsman-style casings with headers work beautifully. For newer construction in Mount Pleasant or Summerville, clean flat-stock casings or colonial profiles are popular. We bring samples to help you decide.

Window casing installation typically ranges from $200-500 per window depending on the profile style, whether you want a full surround with sill and apron, and the complexity of any headers or crossheads. A whole-home window trim package for 15-20 windows usually ranges from $3,000-8,000. We provide free estimates that include material and labor for your specific project.

For a cohesive look, we recommend using the same casing profile on all windows throughout your home. However, you can add extra detail in focal rooms — for example, full picture-frame surrounds with headers in the living room while keeping bedroom windows with simpler casings. We help you create a consistent yet interesting window trim package.

Extension jambs are pieces of wood that extend the window frame to be flush with the wall surface. They're needed when your window sits deeper than the wall thickness — common in older Charleston homes with thick plaster walls or homes with added insulation. We install extension jambs before casing to create a clean, professional finished look.

Yes, decorative window headers (crossheads) are one of our most popular upgrades. They add substantial architectural presence above windows and work especially well in living rooms, dining rooms, and primary bedrooms. We can install simple flat-stock headers or more elaborate built-up designs with backband and crown details.