After ten years of operation, use of the sports pool in Biberach has changed greatly in particular due to an increase in school sports. An extension of the existing indoor pool has therefore been planned with a swimmers’ and a learners’ pool from 2008. The extension is positioned lengthwise and connects to the south side of the existing building. A new swimmers’ pool with sanitary rooms is planned on the ground floor, while two new communal changing rooms will be provided for the upper storey. The existing and new buildings form a unit both architecturally and with regard to their materiality, while a glass partition wall in the interior guarantees that school sports are not disrupted.