Construction had begun on permanent buildings in 1963 and by mid–1964 the students in the eighth to eleventh grades were able to move into their new classrooms.
At that time, there were 524 students and 26 teachers, and a further classroom wing, including an Art Studio and Media Centre had been added and a school hall.
The faith of the founders had been justified and a coat of arms was designed by Mr Alan Woodrow, including the motto: "In hoc signo vinces" meaning "In this sign (the cross) you will conquer."
Academic, sporting and cultural aspects of school life were catered for but Mr Barton felt the spiritual needs of the students should be met.
Fund raising began for a chapel and the Dudley Barton Sanctuary was opened in 1977, dedicated by the Bishop of Natal.
Despite being a public school, Kloof High retains its Christian ethos, but accommodates pupils of all religions.
During March 2005, Mr Seager resigned and was replaced by Mrs Dawn A. Lefort in her capacity as Acting Principal.
About 1000 students, mostly from the suburbs of Kloof, Everton, Gillitts, Waterfall and Forest Hills attend the school.
Other facilities: Kloof High School's students write the KwaZulu-Natal Department of Education NSC exams and consistently achieve good results.
In the case of the Optional line; students approach Mrs Roux for assistance — except for 'Additional Mathematics'.
It provides opportunities to stimulate and develop learners‘ intellect, engaging their creative imagination through visual and tactile experiences and the innovative use of materials and technology in the realisation of their ideas.
Business Studies deals with the knowledge, skills, attitudes and values critical for participation in the economic sectors.
Information Technology (formerly Computer Science HG is a practically oriented subject that focuses primarily on software development.
Sports offered include rugby, hockey (both indoor and outdoor), water polo, soccer (football), swimming, and athletics as well as rock climbing and adventure racing, represented by both boys and girls teams.