diff --git a/src/main/java/hudson/plugins/throttleconcurrents/ThrottleJobProperty.java b/src/main/java/hudson/plugins/throttleconcurrents/ThrottleJobProperty.java
index f913a885..faf6536a 100644
--- a/src/main/java/hudson/plugins/throttleconcurrents/ThrottleJobProperty.java
+++ b/src/main/java/hudson/plugins/throttleconcurrents/ThrottleJobProperty.java
@@ -44,20 +44,22 @@ public class ThrottleJobProperty extends JobProperty<AbstractProject<?,?>> {
     private String throttleOption;
     private transient boolean throttleConfiguration;
     private @CheckForNull ThrottleMatrixProjectOptions matrixOptions;
+    private boolean blockedByCategory;
 
     /**
      * Store a config version so we're able to migrate config on various
      * functionality upgrades.
      */
     private Long configVersion;
-    
+
     @DataBoundConstructor
     public ThrottleJobProperty(Integer maxConcurrentPerNode,
                                Integer maxConcurrentTotal,
                                List<String> categories,
                                boolean throttleEnabled,
                                String throttleOption,
-                               @CheckForNull ThrottleMatrixProjectOptions matrixOptions
+                               @CheckForNull ThrottleMatrixProjectOptions matrixOptions,
+                               boolean blockedByCategory
                                ) {
         this.maxConcurrentPerNode = maxConcurrentPerNode == null ? 0 : maxConcurrentPerNode;
         this.maxConcurrentTotal = maxConcurrentTotal == null ? 0 : maxConcurrentTotal;
@@ -65,6 +67,7 @@ public ThrottleJobProperty(Integer maxConcurrentPerNode,
         this.throttleEnabled = throttleEnabled;
         this.throttleOption = throttleOption;
         this.matrixOptions = matrixOptions;
+        this.blockedByCategory = blockedByCategory;
     }
 
 
@@ -131,7 +134,11 @@ public String getThrottleOption() {
     public List<String> getCategories() {
         return categories;
     }
-    
+
+    public boolean isBlockedByCategory() {
+        return blockedByCategory;
+    }
+
     public Integer getMaxConcurrentPerNode() {
         if (maxConcurrentPerNode == null)
             maxConcurrentPerNode = 0;
diff --git a/src/main/java/hudson/plugins/throttleconcurrents/ThrottleQueueTaskDispatcher.java b/src/main/java/hudson/plugins/throttleconcurrents/ThrottleQueueTaskDispatcher.java
index eb1abece..38f6c797 100644
--- a/src/main/java/hudson/plugins/throttleconcurrents/ThrottleQueueTaskDispatcher.java
+++ b/src/main/java/hudson/plugins/throttleconcurrents/ThrottleQueueTaskDispatcher.java
@@ -1,5 +1,6 @@
 package hudson.plugins.throttleconcurrents;
 
+
 import hudson.Extension;
 import hudson.matrix.MatrixConfiguration;
 import hudson.matrix.MatrixProject;
@@ -18,6 +19,7 @@
 import java.util.Set;
 import java.util.logging.Level;
 import java.util.logging.Logger;
+
 import javax.annotation.CheckForNull;
 import javax.annotation.Nonnull;
 
@@ -153,6 +155,11 @@ else if (tjp.getThrottleOption().equals("category")) {
 
                         // Double check category itself isn't null
                         if (category != null) {
+                            // Check if this job is blocked by category
+                            if (isBlockedByCategory(task, categoryProjects)) {
+                                return CauseOfBlockage.fromMessage(Messages._ThrottleQueueTaskDispatcher_BlockedByCategory(catNm));
+                            }
+
                             if (category.getMaxConcurrentTotal().intValue() > 0) {
                                 int maxConcurrentTotal = category.getMaxConcurrentTotal().intValue();
                                 int totalRunCount = 0;
@@ -178,6 +185,35 @@ else if (tjp.getThrottleOption().equals("category")) {
         return null;
     }
 
+    private boolean isBlockedByCategory(Task task, List<AbstractProject<?, ?>> categoryProjects) {
+        ThrottleJobProperty buildProperty = getThrottleJobProperty(task);
+        if (buildProperty.isBlockedByCategory()) {
+            return areOtherProjectsInCategoryBuilding(task, categoryProjects);
+        }
+        return false;
+    }
+
+    private boolean areOtherProjectsInCategoryBuilding(Task task, List<AbstractProject<?, ?>> categoryProjects) {
+        for (AbstractProject<?, ?> catProj : categoryProjects) {
+            if (!task.equals(catProj)) {
+                if (isBlockingProjectBuilding(catProj)) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    private boolean isBlockingProjectBuilding(AbstractProject<?, ?> catProj) {
+        ThrottleJobProperty catProjThrottleProperty = catProj.getProperty(ThrottleJobProperty.class);
+        if (!catProjThrottleProperty.isBlockedByCategory()) {
+            if (catProj.isBuilding() || catProj.isInQueue()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
     @CheckForNull
     private ThrottleJobProperty getThrottleJobProperty(Task task) {
         if (task instanceof AbstractProject) {
diff --git a/src/main/resources/hudson/plugins/throttleconcurrents/Messages.properties b/src/main/resources/hudson/plugins/throttleconcurrents/Messages.properties
index 949b92e3..3eea533b 100644
--- a/src/main/resources/hudson/plugins/throttleconcurrents/Messages.properties
+++ b/src/main/resources/hudson/plugins/throttleconcurrents/Messages.properties
@@ -1,5 +1,6 @@
 ThrottleQueueTaskDispatcher.MaxCapacityOnNode=Already running {0} builds on node
 ThrottleQueueTaskDispatcher.MaxCapacityTotal=Already running {0} builds across all nodes
 ThrottleQueueTaskDispatcher.BuildPending=A build is pending launch
+ThrottleQueueTaskDispatcher.BlockedByCategory=Build is blocked by other jobs in category {0}
 
 ThrottleMatrixProjectOptions.DisplayName=Additional options for Matrix projects
\ No newline at end of file
diff --git a/src/main/resources/hudson/plugins/throttleconcurrents/ThrottleJobProperty/config.jelly b/src/main/resources/hudson/plugins/throttleconcurrents/ThrottleJobProperty/config.jelly
index e18c2cf3..57bbef84 100644
--- a/src/main/resources/hudson/plugins/throttleconcurrents/ThrottleJobProperty/config.jelly
+++ b/src/main/resources/hudson/plugins/throttleconcurrents/ThrottleJobProperty/config.jelly
@@ -28,6 +28,9 @@
           <st:nbsp/>
         </j:forEach>
       </f:entry>
+      <f:entry title="${%Let this Job be blocked by selected Categories}">
+        <f:checkbox name="blockedByCategory" checked="${instance.blockedByCategory}" />
+      </f:entry>
     </j:if>
     <!--Specific options for Matrix projects-->
     <j:if test="${descriptor.isMatrixProject(it)}">
diff --git a/src/test/java/hudson/plugins/throttleconcurrents/ThrottleJobPropertyTest.java b/src/test/java/hudson/plugins/throttleconcurrents/ThrottleJobPropertyTest.java
index 47f73fbc..f16d8cfb 100644
--- a/src/test/java/hudson/plugins/throttleconcurrents/ThrottleJobPropertyTest.java
+++ b/src/test/java/hudson/plugins/throttleconcurrents/ThrottleJobPropertyTest.java
@@ -21,11 +21,11 @@ public void testGetCategoryProjects() throws Exception {
         String alpha = "alpha", beta = "beta", gamma = "gamma"; // category names
         FreeStyleProject p1 = createFreeStyleProject("p1");
         FreeStyleProject p2 = createFreeStyleProject("p2");
-        p2.addProperty(new ThrottleJobProperty(1, 1, Arrays.asList(alpha), false, THROTTLE_OPTION_CATEGORY, ThrottleMatrixProjectOptions.DEFAULT));
+        p2.addProperty(new ThrottleJobProperty(1, 1, Arrays.asList(alpha), false, THROTTLE_OPTION_CATEGORY, ThrottleMatrixProjectOptions.DEFAULT, false));
         FreeStyleProject p3 = createFreeStyleProject("p3");
-        p3.addProperty(new ThrottleJobProperty(1, 1, Arrays.asList(alpha, beta), true, THROTTLE_OPTION_CATEGORY, ThrottleMatrixProjectOptions.DEFAULT));
+        p3.addProperty(new ThrottleJobProperty(1, 1, Arrays.asList(alpha, beta), true, THROTTLE_OPTION_CATEGORY, ThrottleMatrixProjectOptions.DEFAULT, false));
         FreeStyleProject p4 = createFreeStyleProject("p4");
-        p4.addProperty(new ThrottleJobProperty(1, 1, Arrays.asList(beta, gamma), true, THROTTLE_OPTION_CATEGORY, ThrottleMatrixProjectOptions.DEFAULT));
+        p4.addProperty(new ThrottleJobProperty(1, 1, Arrays.asList(beta, gamma), true, THROTTLE_OPTION_CATEGORY, ThrottleMatrixProjectOptions.DEFAULT, false));
         // TODO when core dep ≥1.480.3, add cloudbees-folder as a test dependency so we can check jobs inside folders
         assertProjects(alpha, p3);
         assertProjects(beta, p3, p4);