if it is built illegally, it should have had a one-hour firelock. if it is a three-unit building, it would require a five-foot setback. in either case, it doesn't meet either of those categories. i am told that the owner of the property did rebuild the stairs and he did it initially without a permit, later came back and had to get it cleared up. on top of that, it should really be closed in by the modern codes. thank you. >> anything further from the department? >> first, with regards to notice, the section 311 notification is for owners and documents. the mailing would have gone to the occupants of the building as well as the owner of the assessor's records. and there is an address on the avenue, in regards to the extensions. it is typical to build when the code does allow the. setbacks are lout with the controlled lockouts on the back. you see either a one-story full addition or a two-story addition setback at the rear. and the residential design guidelines, even the full width may be allowed. you might be able to preserve light and air to windows