Since 1 January 2016, Estonia has recognised same-sex unions by allowing same-sex couples to sign a cohabitation agreement. In addition, following a December 2016 court ruling, same-sex marriages performed abroad are recognised in Estonia.
In December 2005, the launch of a new family law bill by the Estonian Ministry of Justice, explicitly defining marriage to be a union of a man and a woman, initiated a public debate on the issue of recognition of same-sex unions. The public debate was called by the Ministry of Social Affairs, which expressed reservations about the draft law.
The public debate attracted a significant response from LGBT rights groups, who opposed the family law bill and urged the Government not to discriminate between same-sex and opposite-sex couples in marriage, stating that, "We call on the government to drop a clause in the draft law on the family, which does not allow the registration of same-sex marriages or partnerships". On 4 January 2006, five Estonian NGOs supporting LGBT rights issued a press release asking for the Government to draft a new partnership law to give same-sex couples equal rights with opposite-sex couples.
On the other hand, a number of conservative politicians claimed that Estonia was not yet ready for same-sex marriage, and that there was no need to create a separate law on same-sex unions since existing laws already implied the protection of some of these unions, despite not mentioning same-sex unions explicitly. Väino Linde, the chief of the Constitution Commission of the Riigikogu (Estonian Parliament), stated that he was "glad to see the conservative views in the Parliament and in the Commission of Constitution".
As of 2005, the Social Democratic Party was the only political party to publicly affirm its support for same-sex marriage. The Centre Party and the Reform Party said that they would tolerate such a law. Various right-wing parties, particularly the Res Publica and Pro Patria Union, stated their opposition to same-sex marriage.