diff --git a/OntologyDecisionRecords/ODR 004 Introduction of Space:Wing.md b/OntologyDecisionRecords/ODR 004 Introduction of Space:Wing.md
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+# ODR 004 Introduction of Space:Wing
+
+## Context
+
+With the release of Brick 1.4 the brick:Location domain will be deprecated in favour of rec:Space. All Brick:location classes are already covered in REC except for brick:Wing. This ODR introduces the Wing concept in REC for future compatibility reasons.
+
+## Decision
+
+A new class rec:Wing is introduced as subclass to the rec:SubBuilding.
+
+## Consequences
+
+Applications that uses the brick:Wing class can continue to use the building wing abstraction albeit in the REC namespace as rec:Wing.
+
+Note; For new application REC recommends to use the rec:SubBuilding generalization of various building components such as towers, wings etc.
diff --git a/Source/DTDLv2/RealEstateCore/Space/Architecture/SubBuilding.json b/Source/DTDLv2/RealEstateCore/Space/Architecture/SubBuilding/SubBuilding.json
similarity index 100%
rename from Source/DTDLv2/RealEstateCore/Space/Architecture/SubBuilding.json
rename to Source/DTDLv2/RealEstateCore/Space/Architecture/SubBuilding/SubBuilding.json
diff --git a/Source/DTDLv2/RealEstateCore/Space/Architecture/SubBuilding/Wing.json b/Source/DTDLv2/RealEstateCore/Space/Architecture/SubBuilding/Wing.json
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+++ b/Source/DTDLv2/RealEstateCore/Space/Architecture/SubBuilding/Wing.json
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+{
+  "@id": "dtmi:org:w3id:rec:Wing;1",
+  "@type": "Interface",
+  "displayName": {
+    "en": "Wing"
+  },
+  "comment": {
+    "en": "Introduced in REC as Brick is deprecating their location domain. A building may comprise quite many elements such as towers, annexes, rotundas etc. As well as wings. It's difficult to capture all variations in the ontology and REC recommend to use the generalization sub building if possible."
+  },
+  "extends": "dtmi:org:w3id:rec:SubBuilding;1",
+  "@context": ["dtmi:dtdl:context;2"]
+}