diff --git a/bin/build b/bin/build
index 252b8ae..45ea8fb 100755
--- a/bin/build
+++ b/bin/build
@@ -4,6 +4,7 @@ require 'scraperwiki'
 require 'haml'
 require 'pp'
 require 'logger'
+require 'csv'
 require_relative '../lib/helpers'
 
 OUTPUT_DIR = '_site'
@@ -28,6 +29,15 @@ def write_page(path_items, template, locals = {})
   # https://support.google.com/webmasters/answer/183668?hl=en&ref_topic=4581190
 end
 
+def write_csv(path_items, filename, data)
+  dir = File.join(OUTPUT_DIR, path_items)
+  FileUtils.mkdir_p(dir)
+  @log.debug dir
+  fn = File.join(dir, filename + '.csv')
+  File.write(fn, data)
+  @log.info fn
+end
+
 def create_output_dir
   # Recursively delete working directory to ensure no redundant files are left behind from previous builds.
   # FileUtils.rm_rf(@working_dir)
@@ -56,6 +66,13 @@ def gen_authorities
       ")
     apps = ScraperWiki.select("* from applications where authority_name='#{auth['authority_name']}' order by date_received")
     write_page(['authorities', slug(auth['authority_name'])], 'authority', { apps: apps, auth: auth, summary: summary })
+
+    csv_string = CSV.generate do |csv|
+      csv << apps.first.keys # header row
+      apps.each { |app| csv << app.values }
+    end
+
+    write_csv(['authorities', slug(auth['authority_name'])], slug(auth['authority_name']), csv_string)
   end
 end
 
diff --git a/public/style.css b/public/style.css
index 9661a5b..69a8774 100644
--- a/public/style.css
+++ b/public/style.css
@@ -162,6 +162,13 @@ nav
   padding: 10px 20px;
 }
 
+.button, .button a, .button a:visited {
+  background-color: green;
+  color: white;
+  padding: 5px 10px;
+  margin: 10px 0;
+}
+
 .menu {
   margin: 0;
   padding: 0;
diff --git a/views/authority.haml b/views/authority.haml
index 21d7240..ae06e2f 100644
--- a/views/authority.haml
+++ b/views/authority.haml
@@ -21,6 +21,11 @@
 
 %h2 Applications
 
+%p
+  - csv_fn = slug(auth['authority_name']) + '.csv'
+  %a.button{ :href => csv_fn, :download => csv_fn }
+    Download CSV data
+
 %table
   %thead
     %tr