A few other buildings on the base: The building on Munda and Tulagi roads is ComNavSurfPac. Worked there off and on for N4352 /4356. Across the street (Rendova) is the BOQ. The ones along Tarawa are mostly assigned to special warfare units of various sorts.
The one on the corner of Rendova and Guadalcanal is the HQ for US Navy special warfare and training command (eg SEALs, UDT, EOD). The one across the street with trees around it dates to the WW 2 era and used to be the HQ until they built the one they are in now. It in so-so shape today and houses hand-me-down commands that can't get the juice to get better digs. The one at the corner of Munda and Guadalcanal is a classroom building for a variety of courses (took CPO leadership there for example).