diff --git a/app/src/building.js b/app/src/building.js
index 0be8da41..bf2de7eb 100644
--- a/app/src/building.js
+++ b/app/src/building.js
@@ -83,6 +83,16 @@ function getBuildingById(id) {
     });
 }
 
+function getBuildingUPRNsById(id) {
+    return db.any(
+        "SELECT uprn, parent_uprn FROM building_properties WHERE building_id = $1",
+        [id]
+    ).catch(function(error){
+        console.error(error);
+        return undefined;
+    });
+}
+
 function saveBuilding(building_id, building, user_id) {
     // save building could fail if the revision seen by the user != the latest revision
     // - any 'intuitive' retries would need to be handled by clients of this code
@@ -244,5 +254,5 @@ function compare(old_obj, new_obj, whitelist){
     return [forward_patch, reverse_patch]
 }
 
-export { queryBuildingsAtPoint, queryBuildingsByReference, getBuildingById, saveBuilding,
-         likeBuilding };
+export { queryBuildingsAtPoint, queryBuildingsByReference, getBuildingById,
+         getBuildingUPRNsById, saveBuilding, likeBuilding };
diff --git a/app/src/frontend/app.js b/app/src/frontend/app.js
index 5566becf..1049970a 100644
--- a/app/src/frontend/app.js
+++ b/app/src/frontend/app.js
@@ -51,7 +51,26 @@ class App extends React.Component {
     }
 
     selectBuilding(building) {
-        this.setState({building: building})
+        // get UPRNs and update
+        fetch(`/building/${building.building_id}/uprns.json`, {
+            method: 'GET',
+            headers:{
+              'Content-Type': 'application/json'
+            },
+            credentials: 'same-origin'
+        }).then(
+            res => res.json()
+        ).then((res) => {
+            if (res.error) {
+                console.error(res);
+            } else {
+                building.uprns = res.uprns;
+                this.setState({building: building});
+            }
+        }).catch((err) => {
+            console.error(err)
+            this.setState({building: building});
+        });
     }
 
     render() {
diff --git a/app/src/frontend/building-view.js b/app/src/frontend/building-view.js
index d5b992e5..da989616 100644
--- a/app/src/frontend/building-view.js
+++ b/app/src/frontend/building-view.js
@@ -31,13 +31,19 @@ const BuildingView = (props) => {
                         building_id={props.building_id}
                         {...section_props}>
                         {
-                            section_props.fields.map(field_props => (
+                            section_props.fields.map(field_props => {
+                                return (field_props.slug === 'uprns')?
+                                <UPRNsDataEntry
+                                    title={field_props.title}
+                                    value={props.uprns}
+                                    tooltip={field_props.tooltip} />
+                                :
                                 <DataEntry
                                     key={field_props.slug}
                                     title={field_props.title}
                                     value={props[field_props.slug]}
                                     tooltip={field_props.tooltip} />
-                            ))
+                            })
                         }
                     </DataSection>
                 ))
@@ -101,4 +107,40 @@ const DataEntry = (props) => (
     </Fragment>
 );
 
+const UPRNsDataEntry = (props) => {
+    const uprns = props.value || [];
+    const no_parent = uprns.filter(uprn => uprn.parent_uprn == null);
+    const with_parent = uprns.filter(uprn => uprn.parent_uprn != null);
+
+    return (
+    <Fragment>
+        <dt>
+            { props.title }
+            { props.tooltip? <Tooltip text={ props.tooltip } /> : null }
+        </dt>
+        <dd><ul className="uprn-list">
+            <Fragment>{
+                no_parent.length?
+                    no_parent.map(uprn => (
+                        <li>{uprn.uprn}</li>
+                    ))
+                : '\u00A0'
+            }</Fragment>
+            {
+                with_parent.length?
+                <details>
+                    <summary>Children</summary>
+                    {
+                    with_parent.map(uprn => (
+                        <li>{uprn.uprn} (child of {uprn.parent_uprn})</li>
+                        ))
+                    }
+                </details>
+                : null
+            }
+        </ul></dd>
+    </Fragment>
+    )
+}
+
 export default BuildingView;
diff --git a/app/src/frontend/fields-config.json b/app/src/frontend/fields-config.json
index 62cdde54..132c65a2 100644
--- a/app/src/frontend/fields-config.json
+++ b/app/src/frontend/fields-config.json
@@ -20,7 +20,7 @@
                 "disabled": true
             },
             {
-                "title": "UPRNs", "slug": "ref_uprn", "type": "list",
+                "title": "UPRNs", "slug": "uprns", "type": "list",
                 "tooltip": "Unique Property Reference Numbers (to be filled automatically)",
                 "disabled": true
             },
diff --git a/app/src/frontend/sidebar.css b/app/src/frontend/sidebar.css
index 9ca07c69..6fd8bf2f 100644
--- a/app/src/frontend/sidebar.css
+++ b/app/src/frontend/sidebar.css
@@ -258,3 +258,7 @@
 .data-list .no-data {
     color: #999;
 }
+.data-list dd ul {
+    list-style: none;
+    padding-left: 0;
+}
diff --git a/app/src/server.js b/app/src/server.js
index d2a079ed..f03e69da 100644
--- a/app/src/server.js
+++ b/app/src/server.js
@@ -18,7 +18,7 @@ import App from './frontend/app';
 import db from './db';
 import { authUser, createUser, getUserById, authAPIUser, getNewUserAPIKey } from './user';
 import { queryBuildingsAtPoint, queryBuildingsByReference, getBuildingById,
-         saveBuilding, likeBuilding } from './building';
+         getBuildingUPRNsById, saveBuilding, likeBuilding } from './building';
 import tileserver from './tileserver';
 import { parseBuildingURL } from './parse';
 
@@ -76,15 +76,20 @@ function frontendRoute(req, res) {
 
     Promise.all([
         req.session.user_id? getUserById(req.session.user_id) : undefined,
-        is_building? getBuildingById(building_id) : undefined
+        is_building? getBuildingById(building_id) : undefined,
+        is_building? getBuildingUPRNsById(building_id) : undefined
     ]).then(function(values){
         const user = values[0];
         const building = values[1];
+        const uprns = values[2];
         if (is_building && typeof(building) === "undefined"){
             context.status = 404
         }
         data.user = user;
         data.building = building;
+        if (data.building != null) {
+            data.building.uprns = uprns
+        }
         renderHTML(context, data, req, res)
     }).catch(error => {
         console.error(error);
@@ -218,6 +223,22 @@ function updateBuilding(req, res, user_id){
     )
 }
 
+server.get('/building/:building_id/uprns.json', function (req, res) {
+        const { building_id } = req.params;
+        getBuildingUPRNsById(building_id).then(function(result){
+            if (typeof(result) === "undefined") {
+                res.send({error:'Database error'})
+                return
+            }
+            res.send({
+                uprns: result
+            });
+        }).catch(function(error){
+            console.error(error);
+            res.send({error:'Database error'})
+        })
+    })
+
 // POST like building
 server.post('/building/like/:building_id', function(req, res){
     if (!req.session.user_id) {