diff --git a/src/main/java/me/ryanhamshire/GriefPrevention/Claim.java b/src/main/java/me/ryanhamshire/GriefPrevention/Claim.java
index 6aee998..20c201d 100644
--- a/src/main/java/me/ryanhamshire/GriefPrevention/Claim.java
+++ b/src/main/java/me/ryanhamshire/GriefPrevention/Claim.java
@@ -731,17 +731,20 @@ public class Claim
         //not in the same world implies false
         if (!Objects.equals(location.getWorld(), this.lesserBoundaryCorner.getWorld())) return false;
 
+        BoundingBox boundingBox = new BoundingBox(this);
         int x = location.getBlockX();
         int z = location.getBlockZ();
-        int y;
-        if (ignoreHeight) {
-            y = location.getBlockY();
-        } else {
-            y = getLesserBoundaryCorner().getBlockY();
-        }
 
-        //main check
-        if (!new BoundingBox(this).contains(x, y, z)) return false;
+        // If we're ignoring height, use 2D containment check.
+        if (ignoreHeight && !boundingBox.contains2d(x, z))
+        {
+            return false;
+        }
+        // Otherwise use full containment check.
+        else if (!ignoreHeight && !boundingBox.contains(x, location.getBlockY(), z))
+        {
+            return false;
+        }
 
         //additional check for subdivisions
         //you're only in a subdivision when you're also in its parent claim
diff --git a/src/main/java/me/ryanhamshire/GriefPrevention/util/BoundingBox.java b/src/main/java/me/ryanhamshire/GriefPrevention/util/BoundingBox.java
index c4a0794..501cd35 100644
--- a/src/main/java/me/ryanhamshire/GriefPrevention/util/BoundingBox.java
+++ b/src/main/java/me/ryanhamshire/GriefPrevention/util/BoundingBox.java
@@ -143,7 +143,7 @@ public class BoundingBox implements Cloneable
      */
     public BoundingBox(Claim claim)
     {
-        this(claim.getLesserBoundaryCorner(), claim.getGreaterBoundaryCorner().clone().add(0, 255, 0), false);
+        this(claim.getLesserBoundaryCorner(), claim.getGreaterBoundaryCorner().clone().add(0, 319, 0), false);
     }
 
     /**
@@ -558,6 +558,109 @@ public class BoundingBox implements Cloneable
         this.maxZ = Math.max(this.maxZ, other.maxZ);
     }
 
+    /**
+     * Internal containment check ignoring vertical differences.
+     *
+     * @param minX the minimum X value to check for containment
+     * @param minZ the minimum Z value to check for containment
+     * @param maxX the maximum X value to check for containment
+     * @param maxZ the maximum X value to check for containment
+     * @return true if the specified values are inside the bounding box
+     */
+    private boolean contains2dInternal(int minX, int minZ, int maxX, int maxZ) {
+        return minX >= this.minX && maxX <= this.maxX
+                && minZ >= this.minZ && maxZ <= this.maxZ;
+    }
+
+    /**
+     * Checks if the bounding box contains the position specified.
+     *
+     * @param x the X coordinate of the position
+     * @param z the Z coordinate of the position
+     * @return true if the specified position is inside the bounding box
+     */
+    public boolean contains2d(int x, int z)
+    {
+        return contains2dInternal(x, z, x, z);
+    }
+
+    /**
+     * Checks if the bounding box contains the position specified.
+     *
+     * @param position the position
+     * @return true if the specified position is inside the bounding box
+     */
+    public boolean contains2d(Vector position)
+    {
+        return contains2d(position.getBlockX(), position.getBlockZ());
+    }
+
+    /**
+     * Checks if the bounding box contains the position specified.
+     *
+     * @param position the position
+     * @return true if the specified position is inside the bounding box
+     */
+    public boolean contains2d(Location position)
+    {
+        return contains2d(position.getBlockX(), position.getBlockZ());
+    }
+
+    /**
+     * Checks if the bounding box contains the position specified.
+     *
+     * @param position the position
+     * @return true if the specified position is inside the bounding box
+     */
+    public boolean contains2d(Block position)
+    {
+        return contains2d(position.getX(), position.getZ());
+    }
+
+    /**
+     * Checks if the bounding box contains another bounding box consisting of the positions specified.
+     *
+     * @param x1 the X coordinate of the first position
+     * @param z1 the Z coordinate of the first position
+     * @param x2 the X coordinate of the second position
+     * @param z2 the Z coordinate of the second position
+     * @return true if the specified positions are inside the bounding box
+     */
+    public boolean contains2d(int x1, int z1, int x2, int z2)
+    {
+        int minX;
+        int maxX;
+        if (x1 < x2) {
+            minX = x1;
+            maxX = x2;
+        } else {
+            minX = x2;
+            maxX = x1;
+        }
+        int minZ;
+        int maxZ;
+        if (z1 < z2) {
+            minZ = z1;
+            maxZ = z2;
+        } else {
+            minZ = z2;
+            maxZ = z1;
+        }
+
+        return contains2dInternal(minX, minZ, maxX, maxZ);
+    }
+
+    /**
+     * Checks if the bounding box contains another bounding box.
+     *
+     * @param other the other bounding box
+     * @return true if the specified positions are inside the bounding box
+     */
+    public boolean contains2d(BoundingBox other)
+    {
+        return contains2dInternal(other.minX, other.minZ, other.maxX, other.maxZ);
+    }
+
     /**
      * Internal containment check.
      *
@@ -571,9 +674,8 @@ public class BoundingBox implements Cloneable
      */
     private boolean containsInternal(int minX, int minY, int minZ, int maxX, int maxY, int maxZ)
     {
-        return minX >= this.minX && maxX <= this.maxX
-                && minY >= this.minY && maxY <= this.maxY
-                && minZ >= this.minZ && maxZ <= this.maxZ;
+        return contains2dInternal(minX, minZ, maxX, maxZ)
+                && minY >= this.minY && maxY <= this.maxY;
     }
 
     /**
diff --git a/src/test/java/me/ryanhamshire/GriefPrevention/util/BoundingBoxTest.java b/src/test/java/me/ryanhamshire/GriefPrevention/util/BoundingBoxTest.java
index 008d82d..13b89fe 100644
--- a/src/test/java/me/ryanhamshire/GriefPrevention/util/BoundingBoxTest.java
+++ b/src/test/java/me/ryanhamshire/GriefPrevention/util/BoundingBoxTest.java
@@ -73,7 +73,7 @@ public class BoundingBoxTest
             assertEquals(boxB, boxA);
         }
     }
-    
+
     private interface TriConsumer<T, U, V> {
         void apply(T t, U u, V v);
     }
@@ -123,7 +123,7 @@ public class BoundingBoxTest
         assertFalse(boxB.intersects(boxC));
         assertFalse(boxC.intersects(boxB));
     }
-    
+
     @Test
     public void testIntersectCenter()
     {
@@ -162,7 +162,18 @@ public class BoundingBoxTest
         assertTrue(boxA.intersects(boxC));
         assertTrue(boxC.intersects(boxA));
     }
-    
+
+    @Test
+    void testContainment2d() {
+        // Vertical
+        BoundingBox boxA = new BoundingBox(0, 0, 0, 20, 10, 20);
+        BoundingBox boxB = boxA.clone();
+        boxB.move(BlockFace.UP, 20);
+
+        assertFalse(boxA.contains(boxB));
+        assertTrue(boxA.contains2d(boxB));
+    }
+
     @Test
     public void testContainment()
     {