diff --git a/maintenance/extract_data/README.md b/maintenance/extract_data/README.md
index ea684e98..44907546 100644
--- a/maintenance/extract_data/README.md
+++ b/maintenance/extract_data/README.md
@@ -71,6 +71,7 @@ This is the main table, containing almost all data collected by Colouring London
 - `sust_retrofit_date`: year of last significant retrofit
 - `planning_portal_link`: link to an entry on https://www.planningportal.co.uk/
 - `planning_list_id`: National Heritage List for England ID
+- `planning_in_conservation_area_id`: conservation area ID
 - `planning_in_conservation_area_url`: conservation area appraisal link
 - `planning_in_conservation_area_source_url`: conservation area data source link
 - `planning_list_grade`: National Heritage List for England listing grade
diff --git a/maintenance/extract_data/export_attributes.sql b/maintenance/extract_data/export_attributes.sql
index c62a5da9..d0b9c4cc 100644
--- a/maintenance/extract_data/export_attributes.sql
+++ b/maintenance/extract_data/export_attributes.sql
@@ -40,6 +40,7 @@ COPY (SELECT
     construction_secondary_materials,
     construction_roof_covering,
     planning_portal_link,
+    planning_in_conservation_area_id,
     planning_in_conservation_area_url,
     planning_in_conservation_area_source_url,
     planning_conservation_area_name,