The collection is comprised of architectural drawings (1952-1997) completed by American architect, Ethan Jennings Jr. and/or his architectural firm, Ethan Jennings Jr., AIA, CSI and includes Jenning's work from the firm of John Badgley, AIA, where Ethan Jennings Jr. worked in Southern California during the 1950s, as well as work Jenning's completed with Americo Inc., and Tolosa Group. The collection contains 217 sets of drawings, 6 boxes of project records, and 8 flat files of oversized material from over 200 different projects primarily located in California with some projects located in the Las Vegas area. The materials feature hand-drawn architectural drawings, ranging from preliminary sketches to construction documents. The drawings also contain work from consultants, engineers, and other architects who collaborated on the development of the various projects. The drawings include: commercial, industrial, professional, civic, residential, and religious buildings of varying scales, such as libraries, apartments, warehouses, office developments, schools, military buildings, churches, and custom single-family homes located throughout California and Las Vegas. The drawings also include a number of additions, remodels, and renovations. The collection also contains project records like structural calculations and drawings, project manuals and specifications, bid documents, and professional correspondence.

The James B. McDaniel Records (1960-1978) comprise the plans and drawings created by Las Vegas, Nevada architect James McDaniel who worked independently as James Brooks McDaniel Architect (from 1960-1978) and with a partner as Moffitt and McDaniel Architects, Limited (during the 1970s). This collection includes materials from over 115 projects managed by McDaniel. Records include oversized architectural drawings, and files of architectural projects. McDaniel designed many University of Nevada, Las Vegas (UNLV) buildings, residential, commercial, and landscape designs for Las Vegas clients. Also included are business files of construction estimates, specifications, invoices, change orders, and correspondence.

The Harry Hayden Whiteley Photograph Collection (approximately 1940-1967) contains photographic prints and one photographic negative depicting buildings, people, and project locations associated with the Las Vegas, Nevada architect Harry Hayden Whiteley. There is also one album containing photographs of contemporary churches compiled by Whiteley between 1953 to 1958.