/usr/share/kde4/apps/plasma/layout-templates/ is in plasma-netbook 4:4.8.5-0ubuntu0.4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/kde4/apps/plasma/layout-templates/org.kde.plasma-netbook.defaultPage/
/usr/share/kde4/apps/plasma/layout-templates/org.kde.plasma-netbook.defaultPage/contents/
/usr/share/kde4/apps/plasma/layout-templates/org.kde.plasma-netbook.defaultPage/contents/layout.js
/usr/share/kde4/apps/plasma/layout-templates/org.kde.plasma-netbook.defaultPage/metadata.desktop
/usr/share/kde4/apps/plasma/layout-templates/org.kde.plasma-netbook.defaultPanel/
/usr/share/kde4/apps/plasma/layout-templates/org.kde.plasma-netbook.defaultPanel/contents/
/usr/share/kde4/apps/plasma/layout-templates/org.kde.plasma-netbook.defaultPanel/contents/layout.js
/usr/share/kde4/apps/plasma/layout-templates/org.kde.plasma-netbook.defaultPanel/metadata.desktop
/usr/share/kde4/apps/plasma/layout-templates/org.kde.plasma-netbook.defaultSal/
/usr/share/kde4/apps/plasma/layout-templates/org.kde.plasma-netbook.defaultSal/contents/
/usr/share/kde4/apps/plasma/layout-templates/org.kde.plasma-netbook.defaultSal/contents/layout.js
/usr/share/kde4/apps/plasma/layout-templates/org.kde.plasma-netbook.defaultSal/metadata.desktop