This is development research towards the research competency assessment in research learning.  The aim of this research was to determine the content validity and reliability of the research competency assessment tool. The instrument was made in the form of a non-test self-evaluation sheet. The V Aiken’s coefficient was used to evaluate the content validity of the self-evaluation sheet. This research used the development method in line with the ADDIE approach. The research subjects were 48 preservice teachers of building engineering education in Surakarta. The Aiken’s formula was used for the validity study. According to the research results, the research competence instrument was both valid and reliable. The research instrument was appropriate to be used as a guide in assessing the competence of prospective building engineering teachers.