A headline price tells you what you are paying. Price per square metre tells you whether you are paying well — and on the water there is a second number to read alongside it.
When two listings are three million baht apart, the first thing most people do is compare the headline prices. That comparison tells you almost nothing, because the two properties differ in size, location and condition all at once.
Price per square metre is the asking price divided by the floor area. Its value is that it puts properties of different sizes into the same unit.
A 118 sqm two-bedroom at 28.5 million baht works out at roughly 241,500 baht per sqm. A 96 sqm two-bedroom at 19.8 million is roughly 206,000. The second is cheaper both outright and per square metre — but the first may still be the better buy if the floor and the view genuinely differ. What the number does is tell you how large that premium is, so you can decide whether it is worth paying.
For rentals, the same idea applies to monthly rent divided by area.
The area being divided has to be the same area. Some listings count the full balcony, some count half, some count none. A ten-square-metre difference moves the figure far enough to change the conclusion.
An asking price is not a transaction price. A figure calculated from an advertised price is the start of a negotiation, not the market.
Land is quoted differently. Thai land is usually priced per square wah or per rai. One rai is 1,600 square metres; one square wah is 4 square metres. Converting carelessly between units is an easy way to be wrong by a factor of four.
Waterfront land has a variable inland land does not: the width of its frontage on the water.
One rai with 40 metres along the river and one rai with 12 metres of frontage running back inland are not the same asset, even at an identical price per square metre. On the first you can place a house so that every room sees water. On the second you cannot.
So when comparing waterfront plots, read two numbers together: price per square metre, and price per metre of water frontage. A plot that is dearer per square metre but much cheaper per metre of frontage is often the better one to live on.
Every listing here carries its price per square metre, and each listing page compares that figure against our other properties in the same area and deal type — excluding the one you are looking at. An average that includes the subject always reports it as "in line with the average", which tells the reader nothing.
Where we have fewer than two comparable properties in an area, we show no comparison at all. That is better than a number that looks authoritative and is not.
Waterfront land carries building restrictions ordinary land does not: setbacks from the water, Marine Department permits, and zoning. What to establish before paying for a design.
Two riverside plots of identical area can be worth very different amounts, because of how much of each touches the water. Why that is, and how to compare them properly.
A single plot carries at least two prices. The Land Department's assessed value sets the taxes; the market price is what it changes hands for. Knowing which is which keeps the sums right.
