The official DOTE website (dote.tn.gov.in) provides in Tamil. While not full books, these "Study Material" PDFs are officially sanctioned and cover 100% of the syllabus point-by-point.

: A foundational textbook published by the Government of Tamil Nadu, often used for vocational higher secondary and introductory diploma courses. Strength of Materials in Tamil

Most of these books and PDF materials will focus on the following core areas: Construction Materials : Stones, bricks, cement, and timber. : Principles, chain surveying, and leveling. Engineering Mechanics : Basics of forces and structural stability. Building Planning