7 Property operating expenses
| | 2014 | 2013 |
| Taxes | 1,162 | 1,166 |
| Insurance | 80 | 90 |
| Maintenance | 751 | 951 |
| Valuation fees | 166 | 159 |
| Property management fees | 715 | 787 |
| Promotion and marketing | 165 | 117 |
| Letting and lease renewal fees | 296 | 228 |
| Other operating expenses | 949 | 738 |
| Addition to provision for bad debts | 347 | 297 |
| Total property operating expenses | 4,631 | 4,533 |
Download XLSIn 2014, € 0.2 million (2013: € 0.1 million) of the maintenance expenses related to unlet properties.