See the Norman B. Leventhal Map & Education Center gallery hours, special hours, and research hours on their website.
Remote Reference and Research Services:
https://www.leventhalmap.org/research/
Boston City Archives
Holds the records of municipal planning agencies
Boston Planning & Development Agency
Oversees municipal planning and development in Boston
Massachusetts State Archives
Holds the records of state planning agencies
Massachusetts State Library
Holds the Commonwealth's collections of maps, statute books, and government documents.
Registry of Deeds
Documents related to property ownership
Visual Collections at the Harvard University Graduate School of Design
MIT Rotch Library Architecture & Planning
Perceptual Form of the City Collection at MIT
For other towns, search for local archives, libraries, and historical societies