How Official Value Land Thailand Assessments Actually Work
Official value land Thailand’s Treasury Department assesses is calculated differently from buildings or condominiums — using the land itself, independent of any structure sitting on it, as the basis for the appraisal.
Ownership of land in Thailand is legally transferred by a written registration at the relevant authorized Land Office. As with buildings and condominiums, the current fees and taxes applicable to and payable upon such a transfer are: 1) transfer fee; 2) income tax (payable as withholding tax); and 3) stamp duty or specific business tax/local development tax. Each of these is calculated based on the land’s Official Value, or the actual transaction value, whichever is higher.
Unlike buildings — whose Official Value is determined by the Valuation Committee based on construction costs and materials — land itself is appraised separately by the Treasury Department’s Property Valuation Division. This division is responsible specifically for determining land value, while the Land Office separately assesses the value of any structures and improvements built on that land.
The Treasury Department’s appraisal of land value takes into account several factors, including the land’s location, road access and frontage, size and shape, applicable zoning and permitted use, and comparable transactions for similar plots nearby. Once determined, appraised land values are made public and can be checked directly through the Land Code‘s registration framework — either by searching a title deed number, a land parcel number, or a Nor Sor 3 Kor document number through the Treasury Department’s online system.
As with buildings and condominiums, land appraisal values are re-evaluated periodically — generally on a multi-year cycle — and are applied uniformly to comparable land within the same designated area once announced, regardless of a specific plot’s exact position within that zone.
It’s worth noting that a property’s overall appraised value at the time of transfer is often the combination of two separate assessments — the land itself, appraised by the Treasury Department, and any building on it, appraised under the criteria discussed here. Buyers and sellers should confirm both figures are current and accurate before completing a transaction, since fees and taxes are calculated on the combined total.