There was a drawing of the San Jose Mission layout done in 1854 but it is hard to read. An oversimplified colored version we have used in lectures appears below:
The American Buildings Survey website contains a picture taken of Mission San Jose in 1860s, when ruins of the original buildings were still standing.
San Jose Mission c. 1865
The present mission church contains fragments of the originally structure but was largely reconstructed in 1982-85.