How many days in advance can you apply for a visa extension at Pattaya Immigration?

A user inquired about the number of days in advance one can apply for a visa extension at Pattaya Immigration, assuming it is twenty-eight days. The response explains that Jomtien Immigration allows extensions to be applied for when there are 30 days or less remaining on the current visa, but advises that sometimes they may request applicants to return when only a week is left.