diff --git a/rest_framework/schemas/openapi.py b/rest_framework/schemas/openapi.py
index 9b3082822..ee42f4b49 100644
--- a/rest_framework/schemas/openapi.py
+++ b/rest_framework/schemas/openapi.py
@@ -2,6 +2,7 @@ import re
 import warnings
 from collections import OrderedDict
 from decimal import Decimal
+from inspect import getdoc
 from operator import attrgetter
 from urllib.parse import urljoin
 
@@ -284,6 +285,11 @@ class AutoSchema(ViewInspector):
                 elif model_field is not None and model_field.primary_key:
                     description = get_pk_description(model, model_field)
 
+                if model_field is None and variable in model.__dict__.keys() and \
+                        isinstance(model.__dict__[variable], property):
+                    doc = getdoc(model.__dict__[variable])
+                    description = '' if doc is None else doc
+
             parameter = {
                 "name": variable,
                 "in": "path",