The deal would commit Kosovo to a closer partnership and trade ties with the European Union. The association can potentially pave the way for permanent EU membership.
In a statement issued on Wednesday after the meeting with Kosovo's Prime Minister Isa Mustafa, Hahn said he hoped to put forward proposals for the association deal in April.
"I look forward to our Member States' agreement to sign and conclude the Stabilisation and Association Agreement," Hahn said.
The commissioner also stressed the "critical importance" of Kosovo's progress in European integration, for the region and for the European Union.
Serbia also does not recognize the region's independence, but started to normalize relations with Pristina under the 2013 Brussels agreement.
In May 2014, Kosovo Foreign Minister Enver Hoxhaj outlined Pristina's long-term priorities, including joining the EU as a member state within a decade, as well as joining the UN and NATO before 2020.