Check with the building inspectors office.
When I was on jury duty I went to the basement of the hall of records and found all kinds of history on my street and the houses located on it.
Sometimes the name of tract indicated in the deed to your property is a valuable clue as to where the plans, if they still exist, were filed.
Some folks made little developments of 4 or 5 houses in a row. For example my house is part of cogswell tract, 5 houses in a row on Lemoyne St.
All are 5 are built similar.
And many houses were built from kits from Sears Roebuck. There are some resources for that on the net.
Let us know what you find and where.
Old time architects and bulders may have put some of their paperwork in public library archives or still have some in their offices if their companies or predacessors (sp?) still exist.