diff --git a/src/common/daverror.h b/src/common/daverror.h
--- a/src/common/daverror.h
+++ b/src/common/daverror.h
@@ -23,9 +23,11 @@
 
 #include <KJob>
 
+#include <QSharedDataPointer>
 #include <QString>
 
 namespace KDAV {
+/** DAV operation error codes. */
 enum ErrorNumber {
     NO_ERR = 0,
     ERR_PROBLEM_WITH_REQUEST = KJob::UserDefinedError + 200,        //it would be better to request KIO about uts UserDefinedError space.
@@ -45,11 +47,17 @@
     ERR_ITEMLIST_NOMIMETYPE
 };
 
+class ErrorPrivate;
+
+/** DAV operation error. */
 class KPIMKDAV_EXPORT Error
 {
 public:
     explicit Error();
     explicit Error(ErrorNumber errNo, int responseCode, const QString &errorText, int jobErrorCode);
+    Error(const Error&);
+    ~Error();
+    Error& operator=(const Error&);
 
     Q_REQUIRED_RESULT ErrorNumber errorNumber() const;
     Q_REQUIRED_RESULT int responseCode() const;
@@ -59,10 +67,7 @@
     Q_REQUIRED_RESULT QString errorText() const;
 
 private:
-    ErrorNumber mErrorNumber;
-    int mResponseCode;
-    QString mErrorText;
-    int mJobErrorCode;
+    QSharedDataPointer<ErrorPrivate> d;
 };
 }
 
diff --git a/src/common/daverror.cpp b/src/common/daverror.cpp
--- a/src/common/daverror.cpp
+++ b/src/common/daverror.cpp
@@ -24,48 +24,62 @@
 
 using namespace KDAV;
 
+namespace KDAV {
+class ErrorPrivate : public QSharedData
+{
+public:
+    ErrorNumber mErrorNumber = NO_ERR;
+    int mResponseCode = 0;
+    int mJobErrorCode = 0;
+    QString mErrorText;
+};
+}
+
 Error::Error()
-    : mErrorNumber(NO_ERR)
-    , mResponseCode(0)
-    , mJobErrorCode(0)
+    : d(new ErrorPrivate)
 {
 }
 
 Error::Error(ErrorNumber errNo, int responseCode, const QString &errorText, int jobErrorCode)
-    : mErrorNumber(errNo)
-    , mResponseCode(responseCode)
-    , mErrorText(errorText)
-    , mJobErrorCode(jobErrorCode)
+    : d(new ErrorPrivate)
 {
+    d->mErrorNumber = errNo;
+    d->mResponseCode = responseCode;
+    d->mErrorText = errorText;
+    d->mJobErrorCode = jobErrorCode;
 }
 
+Error::Error(const Error&) = default;
+Error::~Error() = default;
+Error& Error::operator=(const Error&) = default;
+
 ErrorNumber Error::errorNumber() const
 {
-    return mErrorNumber;
+    return d->mErrorNumber;
 }
 
 QString Error::internalErrorText() const
 {
-    return mErrorText;
+    return d->mErrorText;
 }
 
 int Error::jobErrorCode() const
 {
-    return mJobErrorCode;
+    return d->mJobErrorCode;
 }
 
 int Error::responseCode() const
 {
-    return mResponseCode;
+    return d->mResponseCode;
 }
 
 QString KDAV::Error::translatedJobError() const
 {
     QString err;
-    if (mJobErrorCode > 0 && mJobErrorCode != KIO::ERR_SLAVE_DEFINED) {
-        err = KIO::buildErrorString(mJobErrorCode, mErrorText);
+    if (d->mJobErrorCode > 0 && d->mJobErrorCode != KIO::ERR_SLAVE_DEFINED) {
+        err = KIO::buildErrorString(d->mJobErrorCode, d->mErrorText);
     } else {
-        err = mErrorText;
+        err = d->mErrorText;
     }
     return err;
 }
@@ -76,30 +90,30 @@
 
     QString err = translatedJobError();
 
-    switch (mErrorNumber) {
+    switch (d->mErrorNumber) {
     case ERR_PROBLEM_WITH_REQUEST:
         // User-side error
-        if (mResponseCode == 401) {
+        if (d->mResponseCode == 401) {
             err = i18n("Invalid username/password");
-        } else if (mResponseCode == 403) {
+        } else if (d->mResponseCode == 403) {
             err = i18n("Access forbidden");
-        } else if (mResponseCode == 404) {
+        } else if (d->mResponseCode == 404) {
             err = i18n("Resource not found");
         } else {
             err = i18n("HTTP error");
         }
         result = i18n("There was a problem with the request.\n"
-                      "%1 (%2).", err, mResponseCode);
+                      "%1 (%2).", err, d->mResponseCode);
         break;
     case ERR_NO_MULTIGET:
         result = i18n("Protocol for the collection does not support MULTIGET");
         break;
     case ERR_SERVER_UNRECOVERABLE:
-        result = i18n("The server encountered an error that prevented it from completing your request: %1 (%2)", err, mResponseCode);
+        result = i18n("The server encountered an error that prevented it from completing your request: %1 (%2)", err, d->mResponseCode);
         break;
     case ERR_COLLECTIONDELETE:
         result = i18n("There was a problem with the request. The collection has not been deleted from the server.\n"
-                      "%1 (%2).", err, mResponseCode);
+                      "%1 (%2).", err, d->mResponseCode);
         break;
     case ERR_COLLECTIONFETCH:
         result = i18n("Invalid responses from backend");
@@ -112,28 +126,28 @@
         break;
     case ERR_COLLECTIONMODIFY:
         result = i18n("There was a problem with the request. The collection has not been modified on the server.\n"
-                      "%1 (%2).", err, mResponseCode);
+                      "%1 (%2).", err, d->mResponseCode);
         break;
     case ERR_COLLECTIONMODIFY_NO_PROPERITES:
         result = i18n("No properties to change or remove");
         break;
     case ERR_COLLECTIONMODIFY_RESPONSE:
         result = i18n("There was an error when modifying the properties");
-        if (!mErrorText.isEmpty()) {
-            result.append(i18n("\nThe server returned more information:\n%1", mErrorText));
+        if (!d->mErrorText.isEmpty()) {
+            result.append(i18n("\nThe server returned more information:\n%1", d->mErrorText));
         }
         break;
     case ERR_ITEMCREATE:
         result = i18n("There was a problem with the request. The item has not been created on the server.\n"
-                      "%1 (%2).", err, mResponseCode);
+                      "%1 (%2).", err, d->mResponseCode);
         break;
     case ERR_ITEMDELETE:
         result = i18n("There was a problem with the request. The item has not been deleted from the server.\n"
-                      "%1 (%2).", err, mResponseCode);
+                      "%1 (%2).", err, d->mResponseCode);
         break;
     case ERR_ITEMMODIFY:
         result = i18n("There was a problem with the request. The item was not modified on the server.\n"
-                      "%1 (%2).", err, mResponseCode);
+                      "%1 (%2).", err, d->mResponseCode);
         break;
     case ERR_ITEMLIST:
     {
diff --git a/src/common/davurl.h b/src/common/davurl.h
--- a/src/common/davurl.h
+++ b/src/common/davurl.h
@@ -23,10 +23,12 @@
 
 #include "enums.h"
 
+#include <QSharedDataPointer>
 #include <QUrl>
 #include <QVector>
 
 namespace KDAV {
+class DavUrlPrivate;
 /**
  * @short A helper class to combine url and protocol of a DAV url.
  */
@@ -42,6 +44,9 @@
      * Creates an empty DAV url.
      */
     DavUrl();
+    DavUrl(const DavUrl&);
+    ~DavUrl();
+    DavUrl& operator=(const DavUrl&);
 
     /**
      * Creates a new DAV url.
@@ -77,8 +82,7 @@
     Q_REQUIRED_RESULT Protocol protocol() const;
 
 private:
-    QUrl mUrl;
-    Protocol mProtocol;
+    QSharedDataPointer<DavUrlPrivate> d;
 };
 
 KPIMKDAV_EXPORT QDataStream &operator<<(QDataStream &out, const DavUrl &url);
diff --git a/src/common/davurl.cpp b/src/common/davurl.cpp
--- a/src/common/davurl.cpp
+++ b/src/common/davurl.cpp
@@ -22,40 +22,54 @@
 
 using namespace KDAV;
 
+namespace KDAV {
+class DavUrlPrivate : public QSharedData
+{
+public:
+    Protocol mProtocol = KDAV::CalDav;
+    QUrl mUrl;
+};
+}
+
 DavUrl::DavUrl()
-    : mProtocol(KDAV::CalDav)
+    : d(new DavUrlPrivate)
 {
 }
 
 DavUrl::DavUrl(const QUrl &url, Protocol protocol)
-    : mUrl(url)
-    , mProtocol(protocol)
+    : d(new DavUrlPrivate)
 {
+    d->mUrl = url;
+    d->mProtocol = protocol;
 }
 
+DavUrl::DavUrl(const DavUrl&) = default;
+DavUrl::~DavUrl() = default;
+DavUrl& DavUrl::operator=(const DavUrl&) = default;
+
 void DavUrl::setUrl(const QUrl &url)
 {
-    mUrl = url;
+    d->mUrl = url;
 }
 
 QUrl DavUrl::url() const
 {
-    return mUrl;
+    return d->mUrl;
 }
 
 void DavUrl::setProtocol(Protocol protocol)
 {
-    mProtocol = protocol;
+    d->mProtocol = protocol;
 }
 
 Protocol DavUrl::protocol() const
 {
-    return mProtocol;
+    return d->mProtocol;
 }
 
 QString DavUrl::toDisplayString() const
 {
-    auto url = mUrl;
+    auto url = d->mUrl;
     url.setUserInfo(QString());
     return url.toDisplayString();
 }