Land price per rai or per square wah: reading listings correctly

Large plots — farmland, orchards, or undeveloped tracts outside town — are usually priced in "baht per rai," since that unit matches the scale of the land. Smaller in-town plots, subdivided housing lots, or vacant land for a single house tend to be priced in "baht per square wah," which gives a finer figure suited to plots in the tens or low hundreds of square wah.

There's no fixed rule for which unit a listing must use. Some sellers pick whichever unit makes the price look most reasonable to a buyer, so it's worth reading closely to see exactly which unit the price is quoted against.

The most direct approach is to convert both plots' prices into the same unit before comparing. Convert a per-rai price to per-wah by dividing by 400, or a per-wah price to per-rai by multiplying by 400. For finer comparisons, convert to price per square metre — a common denominator that works for any plot. The rai to square wah converter handles the conversion instantly.

Example: Plot A is listed at 1.2 million baht per rai, and Plot B at 28,000 baht per square wah. Converting Plot A to a per-wah price gives 1,200,000 ÷ 400 = 3,000 baht per square wah — now directly comparable to Plot B.

Two plots on the same soi can carry very different prices per square wah. Common factors include frontage on a main road versus a deep soi, plot width and shape, zoning that restricts land use, elevation relative to the road, and access to utilities like electricity and piped water.

These factors mean two equally-sized plots in the same neighbourhood can genuinely be worth different amounts. Comparing price per unit is a starting point for evaluation, not the final answer.

Multiplying a per-unit price by the plot's area gives an approximate total value only — it isn't a formal market appraisal, and it isn't financial or investment advice. The actual sale price still depends on negotiation, market conditions at the time, and the plot-specific factors described above.

Before buying or selling, check the assessed value from the Treasury Department, compare actual listings in the area, and consult a licensed real estate professional or broker. That same assessed value is also the base for land tax — see how Thailand's land and building tax is calculated.

The assessed value used as the tax base and as a reference in sales is published by the Treasury Department's appraised-value lookup, the only agency authorised to publish land valuations nationwide on its revaluation cycle.

This assessed value always differs from the actual market price, and should be weighed alongside real listings in the area rather than treated as an interchangeable substitute.

• Confirm exactly which unit each listing prices against — per rai, per square wah, or per square metre — before comparing.
• Convert both plots' prices into the same unit before drawing any conclusion.
• Check frontage, plot width, and zoning — these can make nearby plots price very differently per unit.
• Cross-check against the Treasury Department's assessed value as a reference point, not as the market price.
• Consult a licensed broker or professional before acting on any comparison.