 In late 1980s and especially in the 1990s, Abbas Abad saw rapid redevelopment as construction codes were relaxed (similar to most other districts in Tehran) so to raise taxes and fees, allowing for the development of many apartment and even high-rise complexes (mainly due to a 1989 decree that required different parts of the government, including each municipality, to become financially self-sufficient).As such, Abbas Abad moved away from its somewhat uniform residential roots and became a corporate and business hub as well (although overcrowding became a disputed issue).Presently, many domestic and foreign firms are headquartered and have large business operations in the district, partly due to its convenient location as a mid-way point between the more affluent (and more residential) northern Tehran and older business districts to the south (including Grand Bazaar, Tehran), access to multiple intercity highways, and a metro (or subway) station (Mosallā).