diff --git a/ios/ModalSheet/ModalSheetBottomAttachedOverlayLayoutConfig.swift b/ios/ModalSheet/ModalSheetBottomAttachedOverlayLayoutConfig.swift
new file mode 100644
index 0000000..14de619
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+++ b/ios/ModalSheet/ModalSheetBottomAttachedOverlayLayoutConfig.swift
@@ -0,0 +1,77 @@
+//
+//  ModalSheetBottomAttachedOverlayLayoutConfig.swift
+//  react-native-ios-modal
+//
+//  Created by Dominic Go on 10/6/24.
+//
+
+import Foundation
+
+
+public struct ModalSheetBottomAttachedOverlayLayoutConfig {
+
+  public var horizontalPositionMode: ViewPositionHorizontal;
+  
+  public var marginLeft: CGFloat;
+  public var marginRight: CGFloat;
+  
+  public var marginBottom: ModalSheetBottomDistance;
+  public var paddingBottom: ModalSheetBottomDistance;
+  
+  init(
+    horizontalPositionMode: ViewPositionHorizontal,
+    marginLeft: CGFloat = 0,
+    marginRight: CGFloat = 0,
+    marginBottom: ModalSheetBottomDistance = .zero,
+    paddingBottom: ModalSheetBottomDistance = .zero
+  ) {
+    self.horizontalPositionMode = horizontalPositionMode;
+    self.marginLeft = marginLeft;
+    self.marginRight = marginRight;
+    self.marginBottom = marginBottom;
+    self.paddingBottom = paddingBottom;
+  };
+  
+  public func createExternalHorizontalConstraints(
+    forView childView: UIView,
+    attachingTo parentView: UIView,
+    preferToUseWidthConstraint: Bool = false
+  ) -> [NSLayoutConstraint] {
+  
+    let window =
+         childView.window
+      ?? parentView.window
+      ?? UIApplication.shared.activeWindow;
+  
+    return self.horizontalPositionMode.createHorizontalConstraints(
+      forView: childView,
+      attachingTo: parentView,
+      withWindow: window,
+      marginLeading: self.marginLeft,
+      marginTrailing: self.marginRight,
+      preferToUseWidthConstraint: preferToUseWidthConstraint
+    );
+  };
+  
+  public func createExternalBottomConstraints(
+    forView childView: UIView,
+    attachingTo parentView: UIView
+  ) -> [NSLayoutConstraint] {
+  
+    self.marginBottom.createBottomConstraint(
+      forView: childView,
+      attachingTo: parentView
+    );
+  };
+  
+  public func createInternalBottomConstraint(
+    forView childView: UIView,
+    attachingTo parentView: UIView
+  ) -> [NSLayoutConstraint] {
+  
+    self.paddingBottom.createBottomConstraint(
+      forView: childView,
+      attachingTo: parentView
+    );
+  };
+};