I am in Somerville, MA and I am looking to put an offer on a nice house with very good bones. It was built in 1910 and has been owned by same lady for 40 years. 1. Is there a list somewhere of house improvements that do not require permits? We are thinking about adding couple of windows, skylights, and replacing old posts in the porch with metal ones clad in wood. 2. In the house there is a third floor attic that has been converted to one large bedroom. Are there any code requirements and permit issues to expand existing window frame (only down, while keeping same width) for a floor to ceiling window and railing that creates Juliette balcony? The existing window does look like emergency egress window, but I would like to make the egress larger with the mentioned solution and make the room more sunny. Thanks!