diff --git a/InvenTree/InvenTree/static/css/inventree.css b/InvenTree/InvenTree/static/css/inventree.css
index 6c89ff7265..3725d79c7b 100644
--- a/InvenTree/InvenTree/static/css/inventree.css
+++ b/InvenTree/InvenTree/static/css/inventree.css
@@ -52,6 +52,10 @@
     font-size: 12px;
 }
 
+.glyphicon-right {
+    float: right;
+}
+
 .starred-part {
     color: #ffbb00;
 }
diff --git a/InvenTree/InvenTree/static/script/inventree/bom.js b/InvenTree/InvenTree/static/script/inventree/bom.js
index 8d0accb83b..1b74088abf 100644
--- a/InvenTree/InvenTree/static/script/inventree/bom.js
+++ b/InvenTree/InvenTree/static/script/inventree/bom.js
@@ -133,7 +133,14 @@ function loadBomTable(table, options) {
             title: 'Part',
             sortable: true,
             formatter: function(value, row, index, field) {
-                return imageHoverIcon(row.sub_part_detail.image_url) + renderLink(row.sub_part_detail.full_name, row.sub_part_detail.url);
+                var html = imageHoverIcon(row.sub_part_detail.image_url) + renderLink(row.sub_part_detail.full_name, row.sub_part_detail.url);
+
+                // Display an extra icon if this part is an assembly
+                if (row.sub_part_detail.assembly) {
+                    html += "<a href='" + row.sub_part_detail.url + "bom'><span class='glyphicon-right glyphicon glyphicon-th-list'></span></a>";
+                }
+
+                return html;
             }
         }
     );
diff --git a/InvenTree/part/admin.py b/InvenTree/part/admin.py
index 20ad569a12..6f9d2369e5 100644
--- a/InvenTree/part/admin.py
+++ b/InvenTree/part/admin.py
@@ -129,15 +129,17 @@ class PartStarAdmin(admin.ModelAdmin):
 class BomItemResource(ModelResource):
     """ Class for managing BomItem data import/export """
 
+    level = Field(attribute='level', readonly=True)
+
     part = Field(attribute='part', widget=widgets.ForeignKeyWidget(Part))
 
-    part_name = Field(attribute='part__full_name', readonly=True)
+    parent_part_name = Field(attribute='part__full_name', readonly=True)
 
-    sub_part = Field(attribute='sub_part', widget=widgets.ForeignKeyWidget(Part))
+    id = Field(attribute='sub_part', widget=widgets.ForeignKeyWidget(Part))
 
     sub_part_name = Field(attribute='sub_part__full_name', readonly=True)
 
-    stock = Field(attribute='sub_part__total_stock', readonly=True)
+    sub_assembly = Field(attribute='sub_part__assembly', readonly=True)
 
     class Meta:
         model = BomItem
@@ -145,7 +147,7 @@ class BomItemResource(ModelResource):
         report_skipped = False
         clean_model_instances = True
 
-        exclude = ('checksum')
+        exclude = ['checksum', ]
 
 
 class BomItemAdmin(ImportExportModelAdmin):
diff --git a/InvenTree/part/bom.py b/InvenTree/part/bom.py
index 394314d461..a1f8b5ec6a 100644
--- a/InvenTree/part/bom.py
+++ b/InvenTree/part/bom.py
@@ -40,16 +40,43 @@ def MakeBomTemplate(fmt):
     return DownloadFile(data, filename)
 
 
-def ExportBom(part, fmt='csv'):
+def ExportBom(part, fmt='csv', cascade=False):
     """ Export a BOM (Bill of Materials) for a given part.
+
+    Args:
+        fmt: File format (default = 'csv')
+        cascade: If True, multi-level BOM output is supported. Otherwise, a flat top-level-only BOM is exported.
     """
 
     if not IsValidBOMFormat(fmt):
         fmt = 'csv'
 
-    bom_items = part.bom_items.all().order_by('id')
+    bom_items = []
 
-    dataset = BomItemResource().export(queryset=bom_items)
+    def add_items(items, level):
+        # Add items at a given layer
+        for item in items:
+
+            item.level = '-' * level
+
+            bom_items.append(item)
+
+            if item.sub_part.assembly:
+                add_items(item.sub_part.bom_items.all().order_by('id'), level + 1)
+        
+    if cascade:
+        # Cascading (multi-level) BOM
+
+        # Start with the top level
+        items_to_process = part.bom_items.all().order_by('id')
+
+        add_items(items_to_process, 1)
+
+    else:
+        # No cascading needed - just the top-level items
+        bom_items = [item for item in part.bom_items.all().order_by('id')]
+
+    dataset = BomItemResource().export(queryset=bom_items, cascade=cascade)
     data = dataset.export(fmt)
 
     filename = '{n}_BOM.{fmt}'.format(n=part.full_name, fmt=fmt)
diff --git a/InvenTree/part/forms.py b/InvenTree/part/forms.py
index 7a4eecd583..5adf1e08dd 100644
--- a/InvenTree/part/forms.py
+++ b/InvenTree/part/forms.py
@@ -6,6 +6,7 @@ Django Forms for interacting with Part objects
 from __future__ import unicode_literals
 
 from InvenTree.forms import HelperForm
+from InvenTree.helpers import GetExportFormats
 
 from mptt.fields import TreeNodeChoiceField
 from django import forms
@@ -28,6 +29,26 @@ class PartImageForm(HelperForm):
         ]
 
 
+class BomExportForm(forms.Form):
+    """ Simple form to let user set BOM export options,
+    before exporting a BOM (bill of materials) file.
+    """
+
+    file_format = forms.ChoiceField(label=_("File Format"), help_text=_("Select output file format"))
+
+    cascading = forms.BooleanField(label=_("Cascading"), required=False, initial=False, help_text=_("Download cascading / multi-level BOM"))
+
+    def get_choices(self):
+        """ BOM export format choices """
+
+        return [(x, x.upper()) for x in GetExportFormats()]
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        self.fields['file_format'].choices = self.get_choices()
+
+
 class BomValidateForm(HelperForm):
     """ Simple confirmation form for BOM validation.
     User is presented with a single checkbox input,
diff --git a/InvenTree/part/serializers.py b/InvenTree/part/serializers.py
index 3e1ed6949a..c23298a441 100644
--- a/InvenTree/part/serializers.py
+++ b/InvenTree/part/serializers.py
@@ -65,6 +65,8 @@ class PartBriefSerializer(InvenTreeModelSerializer):
             'available_stock',
             'image_url',
             'active',
+            'assembly',
+            'virtual',
         ]
 
 
diff --git a/InvenTree/part/templates/part/bom.html b/InvenTree/part/templates/part/bom.html
index 3d61e24e2a..374acc94fd 100644
--- a/InvenTree/part/templates/part/bom.html
+++ b/InvenTree/part/templates/part/bom.html
@@ -44,16 +44,7 @@
     {% if part.is_bom_valid == False %}
     <button class='btn btn-default' id='validate-bom' type='button'><span class='glyphicon glyphicon-check'></span></button>
     {% endif %}
-    <div class='btn-group' role='group'>
-        <div class='dropdown'>
-            <button title='Export BOM' class='btn btn-default dropdown-toggle' data-toggle='dropdown' type='button'><span class='glyphicon glyphicon-download-alt'></span></button>
-            <ul class='dropdown-menu'>
-                <li><a href='#' class='download-bom' format='csv'>CSV</a></li>
-                <li><a href='#' class='download-bom' format='xlsx'>XLSX</a></li>
-                <li><a href='#' class='download-bom' format='json'>JSON</a></li>
-            </ul>
-        </div>
-    </div>
+    <button title='Export BOM' class='btn btn-default' id='download-bom' type='button'><span class='glyphicon glyphicon-download-alt'></span></button>
     {% endif %}
 </div>
 
@@ -119,8 +110,14 @@
         location.href = "{% url 'part-bom' part.id %}?edit=1";
     });
 
-    $(".download-bom").click(function () {
-        location.href = "{% url 'bom-export' part.id %}?format=" + $(this).attr('format');
+    $("#download-bom").click(function () {
+        launchModalForm("{% url 'bom-export' part.id %}",
+            {
+                success: function(response) {
+                    location.href = response.url;
+                },
+            }
+        );
     });
 
     {% endif %}
diff --git a/InvenTree/part/test_views.py b/InvenTree/part/test_views.py
index 840f0a94ca..16711c78f6 100644
--- a/InvenTree/part/test_views.py
+++ b/InvenTree/part/test_views.py
@@ -81,7 +81,7 @@ class PartDetailTest(PartViewTestCase):
     def test_bom_download(self):
         """ Test downloading a BOM for a valid part """
 
-        response = self.client.get(reverse('bom-export', args=(1,)), HTTP_X_REQUESTED_WITH='XMLHttpRequest')
+        response = self.client.get(reverse('bom-download', args=(1,)), HTTP_X_REQUESTED_WITH='XMLHttpRequest')
         self.assertEqual(response.status_code, 200)
         self.assertIn('streaming_content', dir(response))
     
diff --git a/InvenTree/part/urls.py b/InvenTree/part/urls.py
index 48e647302a..36be170bcb 100644
--- a/InvenTree/part/urls.py
+++ b/InvenTree/part/urls.py
@@ -33,7 +33,8 @@ part_parameter_urls = [
 part_detail_urls = [
     url(r'^edit/?', views.PartEdit.as_view(), name='part-edit'),
     url(r'^delete/?', views.PartDelete.as_view(), name='part-delete'),
-    url(r'^bom-export/?', views.BomDownload.as_view(), name='bom-export'),
+    url(r'^bom-export/?', views.BomExport.as_view(), name='bom-export'),
+    url(r'^bom-download/?', views.BomDownload.as_view(), name='bom-download'),
     url(r'^validate-bom/', views.BomValidate.as_view(), name='bom-validate'),
     url(r'^duplicate/', views.PartDuplicate.as_view(), name='part-duplicate'),
     url(r'^make-variant/', views.MakePartVariant.as_view(), name='make-part-variant'),
diff --git a/InvenTree/part/views.py b/InvenTree/part/views.py
index 24717d55bb..584c8fe62f 100644
--- a/InvenTree/part/views.py
+++ b/InvenTree/part/views.py
@@ -1332,12 +1332,14 @@ class BomDownload(AjaxView):
 
         part = get_object_or_404(Part, pk=self.kwargs['pk'])
 
-        export_format = request.GET.get('format', 'csv')
+        export_format = request.GET.get('file_format', 'csv')
+
+        cascade = str2bool(request.GET.get('cascade', False))
 
         if not IsValidBOMFormat(export_format):
             export_format = 'csv'
 
-        return ExportBom(part, fmt=export_format)
+        return ExportBom(part, fmt=export_format, cascade=cascade)
 
     def get_data(self):
         return {
@@ -1345,6 +1347,47 @@ class BomDownload(AjaxView):
         }
 
 
+class BomExport(AjaxView):
+    """ Provide a simple form to allow the user to select BOM download options.
+    """
+
+    model = Part
+    form_class = part_forms.BomExportForm
+    ajax_form_title = _("Export Bill of Materials")
+
+    def get(self, request, *args, **kwargs):
+        return self.renderJsonResponse(request, self.form_class())
+
+    def post(self, request, *args, **kwargs):
+
+        # Extract POSTed form data
+        fmt = request.POST.get('file_format', 'csv').lower()
+        cascade = str2bool(request.POST.get('cascading', False))
+
+        try:
+            part = Part.objects.get(pk=self.kwargs['pk'])
+        except:
+            part = None
+
+        # Format a URL to redirect to
+        if part:
+            url = reverse('bom-download', kwargs={'pk': part.pk})
+        else:
+            url = ''
+
+        url += '?file_format=' + fmt
+        url += '&cascade=' + str(cascade)
+
+        print("URL:", url)
+
+        data = {
+            'form_valid': part is not None,
+            'url': url,
+        }
+
+        return self.renderJsonResponse(request, self.form_class(), data=data)
+
+
 class PartDelete(AjaxDeleteView):
     """ View to delete a Part object """