The Singapore government had temporarily suspended the tender of land for religious purpose for about four years since 2014. However, recently, the Government announced that they will reopen the tender.
Are there any errors in the text above, especially in regard to the part in bold?
Thanks.
I think that “about four years after 2014.” or “about four years, starting in 2014.” might be better. “Since” almost always runs from a point in the past all the way until the present time. This is not the case here, so “since” sounds a little odd.
edited - Now I am not so sure, because the tender has not been reopened yet, so the “since” makes more sense. 
MI think you need to change the word order and the tense I would suggest putting ‘Since 2014’ at the beginning and then change the tense to - The Singapore government has now temporarily suspended …, for about 4 years…,
I tend to put it this way: The Singapore government suspended the tender of land for religious purposes for about four years from 2014. However, recently, the Government have announced that they will reopen the tender.
In that case, I think, ‘The Singapore government have suspended the tender of land for religious purposes since 2014. However, recently, the Government have announced that they will reopen the tender.’ would look still better.
Alan, I think ‘temporarily’ is redundant.