diff --git a/src/building.js b/src/building.js
index fa0a80b..756d23b 100644
--- a/src/building.js
+++ b/src/building.js
@@ -214,7 +214,7 @@ class Building {
       // Filter to all ways
       var parts = this.fullXmlData.getElementsByTagName('way');
       for (const xmlPart of parts) {
-        if (xmlPart.querySelector('[k="building:part"]')) {
+        if (xmlPart.querySelector('[k="building:part"]:not([v="no"])')) {
           const id = xmlPart.getAttribute('id');
           const part = new BuildingPart(id, this.fullXmlData, this.nodelist, this.outerElement.options);
           if (this.partIsInside(part)) {
@@ -225,7 +225,7 @@ class Building {
       // Filter all relations
       parts = this.fullXmlData.getElementsByTagName('relation');
       for (let i = 0; i < parts.length; i++) {
-        if (parts[i].querySelector('[k="building:part"]')) {
+        if (parts[i].querySelector('[k="building:part"]:not([v="no"])')) {
           const id = parts[i].getAttribute('id');
           try {
             this.parts.push(new MultiBuildingPart(id, this.fullXmlData, this.nodelist, this.outerElement.options));
diff --git a/src/buildingpart.js b/src/buildingpart.js
index 25d4838..eecb463 100644
--- a/src/buildingpart.js
+++ b/src/buildingpart.js
@@ -337,8 +337,8 @@ class BuildingPart {
     } else if (this.way.querySelector('[k="building:levels"]') !== null) {
       // if not, use building:levels and 3 meters per level.
       height = 3 * this.way.querySelector('[k="building:levels"]').getAttribute('v') + this.options.roof.height;
-    } else if (this.way.querySelector('[k="building:part"]') !== null) {
-      if (this.way.querySelector('[k="building:part"]').getAttribute('v') === 'roof') {
+    } else if (this.way.querySelector('[k="building:part"]:not([v="no"])') !== null) {
+      if (this.way.querySelector('[k="building:part"]:not([v="no"])').getAttribute('v') === 'roof') {
         // a roof has no building part by default.
         height = this.options.roof.height;
       }
diff --git a/test/building.test.js b/test/building.test.js
index c14e08f..4b66b1a 100644
--- a/test/building.test.js
+++ b/test/building.test.js
@@ -487,6 +487,64 @@ test('Part must be within outline', () => {
   expect(new Building('11', data).parts.length).toBe(0);
 });
 
+test('Outline with building:part=no is not added to parts', () => {
+  const data = `<?xml version="1.0" encoding="UTF-8"?>
+<osm>
+ <node id="1" lat="0.001" lon="0.001"/>
+ <node id="2" lat="0.001" lon="0"/>
+ <node id="3" lat="0" lon="0"/>
+ <way id="11">
+  <nd ref="1"/>
+  <nd ref="2"/>
+  <nd ref="3"/>
+  <nd ref="1"/>
+  <tag k="building" v="apartments"/>
+  <tag k="building:part" v="no"/>
+ </way>
+ <way id="22">
+  <nd ref="1"/>
+  <nd ref="2"/>
+  <nd ref="3"/>
+  <nd ref="1"/>
+  <tag k="building:part" v="yes"/>
+ </way>
+</osm>
+`;
+  const building = new Building('11', data);
+  expect(building.parts.map((part) => part.id)).toStrictEqual(['22']);
+});
+
+test('Outline with building:part=no is not added to parts (multipolygon)', () => {
+  const data = `<?xml version="1.0" encoding="UTF-8"?>
+<osm>
+ <node id="1" lat="0.001" lon="0.001"/>
+ <node id="2" lat="0.001" lon="0"/>
+ <node id="3" lat="0" lon="0"/>
+ <way id="11">
+  <nd ref="1"/>
+  <nd ref="2"/>
+  <nd ref="3"/>
+  <nd ref="1"/>
+ </way>
+ <way id="22">
+  <nd ref="1"/>
+  <nd ref="2"/>
+  <nd ref="3"/>
+  <nd ref="1"/>
+  <tag k="building:part" v="yes"/>
+ </way>
+ <relation id="42">
+  <member type="way" ref="22" role="outer"/>
+  <tag k="type" v="multipolygon"/>
+  <tag k="building" v="apartments"/>
+  <tag k="building:part" v="no"/>
+</relation>
+</osm>
+`;
+  const building = new Building('42', data);
+  expect(building.parts.map((part) => part.id)).toStrictEqual(['22']);
+});
+
 window.printError = printError;
 
 var errors = [];