Union College was built in five stages from June 1964 to March 1974. It consists of three buildings and two landscaped courtyards. It was built in five separately budgeted stages. Each stage included landscaping and an increase in facilities to common areas of the precious stages. The client for the construction was the Union College Council. The site, suggested by Birrell, was a narrow strip of vacant land on the south western corner of the St. Lucia campus bordered by Upland Road, Sir William Macgregor Drive and Oval No. 1. The site had many well established trees and Birrell's design retained almost all of them. There are 6 volumes of architectural drawings, 175 individual drawings making a total of 242 drawings for the Union College. Stage 1 was by James Birrell as University Architect and Stages 2-5 were by James Birrell & Partners.