Deputy Education Minister I, Datuk Mary Yap Kain Ching, gave the assurance after visiting the site here, Tuesday.
She was accompanied by the Deputy Secretary for Development (Federal), Sabah, Fareed Abdullah Lim, and Headmaster Bernard Lucas Daim.
"We will first make an estimate on the need and the Public Works Department (JKR) has to furnish a report on the matter," she said.
SK Tampasak, a single session school, has an enrolment of 250 pupils with a staffing strength of 25 teachers.
Yap was told that the fire, which was detected at 1.20pm after the school session ended, destroyed four classrooms, the Resource Centre, 10 computer sets at the Access Centre, Rehabilitation Room and textbook store. School had dismissed at 12.40pm.
It was suspected that the fire occurred due to a short circuit as the school frequently experienced 'tripping'.
The Deputy Education Minister I said the teaching-learning process would not be adversely affected as there are two more wooden blocks that can be used.
"Moreover, the headmaster had suggested having a double session school, that is, Year 1, 2 and 3 in the morning, and Year 4, 5 and 6 in the afternoon, pending rebuilding of the affected block," she added.
Earlier, Yap, who is Member of Parliament for Tawau, chaired a meeting of the Sabah Education Development Monitoring Committee at the State Education Department's headquarters at Rumah Persekutuan Sabah.