Chennai is the only major metro among India's biggest cities whose property tax still runs on Reasonable Letting Value — a rental-value method, not a capital-value one. It also clears the GST metro affordable-housing threshold (60 sq m carpet area, ₹45 lakh cap) for new construction, and a delayed OMR project still owes you interest under the central RERA Act even though Tamil Nadu's own state RERA rules could not be verified this session.
Why Chennai's property tax formula looks nothing like Mumbai's or Bengaluru's
Greater Chennai Corporation (GCC) computes property tax on Reasonable Letting Value (R.L.V.) under Section 100 of the Chennai City Municipal Corporation Act, 1919 — a rent-based method inherited from the colonial-era municipal acts, unlike Mumbai's capital-value system or Bengaluru's unit-area system. The annual rental value is built from the plinth area multiplied by a location-wise basic rate per square foot, then multiplied by 10.92 — GCC's own stated "common factor" that bakes in a 10% depreciation allowance and a 10% addition for land value.
- ·Base: plinth area × location-wise basic rate per sq ft = monthly rental value.
- ·Annualised: monthly rental value × 10.92 (GCC's stated common factor).
- ·Half-yearly tax: a percentage of that annual rental value, per GCC's prescribed bracket table.
- ·Special property types use a different base entirely — nursing homes are taxed at 13.5% of annual room-tariff income, star hotels at 10% of annual room tariff.
GCC's own page does not publish the specific R.L.V.-band-to-tax-percentage table, so this article does not state a Chennai tax rate as a percentage — confirm your own bracket on the GCC portal before budgeting.
GST on an OMR or Sipcot under-construction flat
Chennai is named directly as a metropolitan city under CBIC's affordable-housing definition: carpet area up to 60 sq m and value up to ₹45 lakh qualifies a new-construction unit for the 1% effective GST rate (no input tax credit); everything above either threshold pays the standard 5% effective rate, also without ITC, per the underlying rate notification.
GST exits the picture entirely once the full consideration is paid only after the completion certificate is issued or after first occupation, whichever is earlier — the statutory trigger in Schedule II, clause 5(b), read with Schedule III, entry 5, of the CGST Act. A ready-to-move-in resale flat off Anna Nagar in an already-occupied block carries no GST on this basis.
Buyer protections that apply to a Chennai project even without a TN-RERA rate
Tamil Nadu's own RERA rules — the state-set interest rate a promoter owes for possession delay — could not be verified from a reachable rera.tn.gov.in source this session; name the Tamil Nadu Real Estate Regulatory Authority (TN-RERA) as the authority to check directly, without a rate figure here. What does not depend on the state rules is the central Real Estate (Regulation and Development) Act, 2016 itself, which binds every registered project in Chennai regardless: a promoter must deposit 70% of amounts realised from allottees into a separate account used only for that project's construction and land cost, cannot collect more than 10% of the cost as advance or application fee before a registered agreement for sale, and — if possession is delayed — owes the allottee monthly interest until handover, at whatever rate the state prescribes (the figure Tamil Nadu itself could not be confirmed this session).
Any aggrieved allottee — including an association of allottees — can file a complaint with the state Authority or adjudicating officer over any breach of the Act, rules or regulations by a promoter, allottee or agent.
Methodology
The R.L.V. property-tax method is quoted from GCC's own portal. GST figures come from CBIC's affordable-housing definition and the underlying rate notification, read together with Schedule II and Schedule III of the CGST Act for the completion-certificate exemption; the worked examples are arithmetic on those published thresholds. RERA buyer-protection mechanics are quoted from the central Act's own gazetted text, since Tamil Nadu's own state rules were not reachable this session.
Sources
- Greater Chennai Corporation — Property Tax, Tax Assessment — accessed 2026-09-21
- CBIC — GST: An Update (affordable-housing definition) — accessed 2026-09-21
- GST Council Secretariat — Notification No. 11/2017-Central Tax (Rate), as amended — accessed 2026-09-21
- CBIC — CGST Act, 2017, Schedule III (Section 7) — accessed 2026-09-21
- CBIC — CGST Act, 2017, Schedule II (Section 7) — accessed 2026-09-21
- UP-RERA (official mirror) — The Real Estate (Regulation and Development) Act, 2016 — accessed 2026-09-21