genesis_site_layout.php

<?php // <- Remove <?php if your using this snippet

// Hook in just before the main content-sidebar-wrap
add_action( 'genesis_before_content_sidebar_wrap', 'custom_layout_sidebar' );
function custom_layout_sidebar() {

$layout = genesis_site_layout();

// check to see if the custom layout exists
if( 'layout-name' == $layout ) {

    echo '<div id="custom-sidebar">';
        // Open genesis structural wrap
        // Registered your wrap with add_theme_support( 'genesis-structural-wraps', array(, 'custom-sidebar' ) ); in functions.php
        genesis_structural_wrap( 'custom-sidebar' );
            
            // Add our sidebar
            dynamic_sidebar( 'custom-sidebar' );
        
        // Close the structural wrap
        genesis_structural_wrap( 'custom-sidebar', 'close' );
        
    echo '</div>';
 
}
}