diff --git a/Geometry_Engine/Query/DominantEdgeDirection.cs b/Geometry_Engine/Query/DominantEdgeDirection.cs
new file mode 100644
index 000000000..fdc96fd33
--- /dev/null
+++ b/Geometry_Engine/Query/DominantEdgeDirection.cs
@@ -0,0 +1,60 @@
+/*
+ * This file is part of the Buildings and Habitats object Model (BHoM)
+ * Copyright (c) 2015 - 2026, the respective contributors. All rights reserved.
+ *
+ * Each contributor holds copyright over their respective contributions.
+ * The project versioning (Git) records all such contribution source information.
+ *                                           
+ *                                                                              
+ * The BHoM is free software: you can redistribute it and/or modify         
+ * it under the terms of the GNU Lesser General Public License as published by  
+ * the Free Software Foundation, either version 3.0 of the License, or          
+ * (at your option) any later version.                                          
+ *                                                                              
+ * The BHoM is distributed in the hope that it will be useful,              
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 
+ * GNU Lesser General Public License for more details.                          
+ *                                                                            
+ * You should have received a copy of the GNU Lesser General Public License     
+ * along with this code. If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.      
+ */
+
+using BH.oM.Base.Attributes;
+using BH.oM.Geometry;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+
+namespace BH.Engine.Geometry
+{
+    public static partial class Query
+    {
+        /***************************************************/
+        /**** Public Methods                            ****/
+        /***************************************************/
+
+        [Description("Returns the direction of the dominant edge of a polyline.")]
+        [Input("polyline", "Polyline whose edge directions are evaluated.")]
+        [Input("tolerance", "Minimum edge length.")]
+        [Input("angleTolerance", "Angular tolerance used when comparing edge directions for parallelism.")]
+        [Output("direction", "Direction vector of the dominant edge.")]
+        public static Vector DominantEdgeDirection(this Polyline polyline, double tolerance = Tolerance.Distance, double angleTolerance = Tolerance.Angle)
+        {
+            List<Line> edges = polyline.SubParts().Where(x => x != null && x.Length() > tolerance).ToList();
+            Dictionary<Vector, double> dirLen = new Dictionary<Vector, double>();
+            foreach (Line edge in edges)
+            {
+                Vector direction = edge.Direction();
+                Vector existDir = dirLen.Keys.FirstOrDefault(x => x.IsParallel(direction, angleTolerance) != 0);
+
+                if (existDir != null)
+                    dirLen[existDir] += edge.Length();
+                else
+                    dirLen[direction] = edge.Length();
+            }
+
+            return dirLen.OrderByDescending(x => x.Value).First().Key;
+        }
+    }
+}
diff --git a/Geometry_Engine/Query/IsRectangular.cs b/Geometry_Engine/Query/IsRectangular.cs
index 856108f56..70ea15ddb 100644
--- a/Geometry_Engine/Query/IsRectangular.cs
+++ b/Geometry_Engine/Query/IsRectangular.cs
@@ -20,15 +20,12 @@
  * along with this code. If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.      
  */
 
-using BH.oM.Geometry;
 using BH.oM.Base.Attributes;
-using BH.Engine.Geometry;
-using BH.Engine.Reflection;
-
+using BH.oM.Geometry;
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using System.ComponentModel;
+using System.Linq;
 
 namespace BH.Engine.Geometry
 {
@@ -40,7 +37,7 @@ public static partial class Query
 
         [Description("Determines whether a Polycurve is a rectangular.")]
         [Input("polycurve", "The Polycurve to check if it is rectangular.")]
-        [Output("bool", "True for Polycurves that are rectangular or false for Polycurves that are rectangular.")]
+        [Output("bool", "True for Polycurves that are rectangular or false for Polycurves that are not rectangular.")]
         public static bool IsRectangular(this PolyCurve polycurve)
         {
             if (polycurve == null)
@@ -63,6 +60,30 @@ public static bool IsRectangular(this PolyCurve polycurve)
             return (angles.Any(x => Math.Abs(Math.PI / 2 - x) > Tolerance.Angle)) ? false : true;
         }
 
+        /***************************************************/
+
+        [Description("Checks whether a Polyline is a rectangular.")]
+        [Input("polyline", "The Polyline to check if it is rectangular.")]
+        [Input("tolerance", "Maximum allowed distance deviation for closure and diagonal equality checks.")]
+        [Output("isRectangular", "True for the Polylines that are rectangular or false for Polylines that are not rectangular.")]
+        public static bool IsRectangular(this Polyline polyline, double tolerance = Tolerance.Distance)
+        {
+            List<Point> pts = polyline?.ControlPoints;
+            if (pts == null || pts.Count != 5)
+                return false;
+
+            if (polyline.IsPlanar(tolerance) != true)
+                return false;
+
+            if (polyline.IsClosed(tolerance) != true)
+                return false;
+
+            double diagonal1 = pts[2].Distance(pts[0]);
+            double diagonal2 = pts[3].Distance(pts[1]);
+
+            return Math.Abs(diagonal1 - diagonal2) <= tolerance;
+        }
+
         /***************************************************/
         /**** Private Methods                           ****/
         /***************************************************/