Unfortunately, nothing about the new headquarters makes you want to take a stroll up Ridge Avenue. While the building (designed by BLT Architects) succeeds in projecting the gravitas we expect from government offices, its ground floor is less than welcoming. Neither of its two public rooms can be entered directly from Ridge Avenue. (The door to the PHA’s customer service center is on Jefferson.) While the PHA’s plans call for a cafe and bank at the eastern end of the site, the authority has yet to secure tenants.