TWAD Board Plinth Rate Schedule of Rates
About Tamil Nadu Water Supply & Drainage Board — Plinth Area Rates
TWAD Board's published documents complement the unified Tamil Nadu PWD-Highways SOR. Where the state SOR covers general civil items, TWAD's separate SoR covers water-supply scheme specifics: intake structures, raw-water transmission, treatment-plant civil, distribution-network mains, household connections, and rural water-supply scheme components. JJM-Tamil Nadu rural water-supply scheme implementation uses TWAD SoR as the primary rate reference. TWAD's plinth-area-rate references are useful for plinth-area-based quick estimates of treatment-plant building costs and water-utility office buildings.
Frequently Asked Questions
How is TWAD SoR different from TN PWD SOR?
TN PWD-Highways SOR covers general civil works (buildings, roads, bridges). TWAD SoR specifically covers water-supply scheme works (intake, treatment, transmission, distribution, household tap connections). JJM-Tamil Nadu uses TWAD SoR primarily.
What's the latest TWAD SoR?
TWAD publishes year-wise SoRs from 2018 onwards. Visit twadboard.tn.gov.in/schedule-of-rates for the year-wise PDF list. Latest is typically 2023-24 with mid-year amendments.
Does CMWSSB Chennai Water Board use TWAD SoR?
CMWSSB has its own internal rate framework for Chennai-specific works (large-diameter mains, sewer interceptors, sewage treatment). For routine civil items, references TWAD SoR + state PWD SOR.
What about plinth-area rates?
TWAD's plinth-area rates apply to water-utility office buildings, residential quarters, and treatment-plant buildings. Useful for quick cost estimates at concept stage before detailed BoQ preparation.
Are TWAD rates applicable outside Tamil Nadu?
No. TWAD SoR is Tamil Nadu-specific. Other states use their own water-supply utility SSRs (MJP for Maharashtra, GWSSB for Gujarat, KWA for Kerala, etc.).