Depending on what you need to do later with it, you can consider to make a complex tileable material with some permutations and with bump maps on mind, to turn flat surfaces into brick walls with defects (as long they will be superficial and you dont expect to make holes on it) making such a material with very high quality could require some time, but will be a nice solution and will give you good results and the chance to work with low polys instead use different brick high quality polys and placed one by one (or with modifiers)
The individual brick pieces used to create a building/wall could be interesting for some things, but looking at thing like MassFx that also allows to project a brick pattern into low polys to simulate destruction you could even achieve this kind of objective with similar results but keeping it "light"
