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Map guides · Episode 3

The river

The Chao Phraya carried Bangkok long before the rail did. On its banks, 59% of condominiums rise to 30 floors or more, against 23% in the rest of the city, and the median square metre sells at the price of the neighbouring streets: it is at the top of the market that the river makes the difference.

Survey of 19 October 2026 · asking prices, median per development

Each dot is a development we track; its colour is its median asking price per square metre.

30,000 ฿/m²180,000 ฿/m² and above

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The river came before the city

Before the towers, there was water. The royal city of Rattanakosin was founded in 1782 on the east bank of the Chao Phraya, a 372-kilometre river running down to the gulf. Follow its course to the sea: 65 of the 2,112 condominiums we track in the capital stand within 500 metres of its waters.

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Sources

Reflexion survey of 19 October 2026 · Wikipedia — Chao Phraya River, accessed 23 September 2026

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By the water, the city rises

At the water's edge, the city climbs. 59.4% of riverside condominiums have 30 floors or more, against 22.7% in the rest of Bangkok; 25.0% have 40 or more, against 6.4%. The two tallest answer each other across the water: Four Seasons Private Residences, 73 floors on the east bank, Magnolias Waterfront Residences, 70 floors on the west.

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Sources

Reflexion survey of 19 October 2026 · Wikipedia — Icon Siam, accessed 23 September 2026

3 of 8

The river's price is set at the top

At the median square metre, the river costs no more than the neighbouring streets: THB 107,836 (€2,810) at the water's edge, 11.0% above the rest of Bangkok, but on a par with the same districts away from the water, THB 108,148 (€2,818). The bank stands out at the top: it holds only 3.2% of projects for sale, but 3 of the twenty most expensive in Bangkok, including The Residences Mandarin Oriental.

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Sources

Asking prices, not sale prices.

Reflexion survey of 19 October 2026

4 of 8

Two banks, two capitals

Cross the river. Thonburi, on the west bank, was the kingdom's capital from 1767 to 1782, before Rattanakosin rose opposite. The two banks have not kept the same price: the east lines up 36 riverside condominiums at a median THB 111,310 per m² (€2,901), the west 29 at THB 106,123 (€2,765), a gap of 4.9%.

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Sources

Reflexion survey of 19 October 2026 · Wikipedia — Thonburi Kingdom, accessed 23 September 2026 · Wikipedia — Chao Phraya River, accessed 23 September 2026

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1985

Two banks, two rhythms

The two banks did not rise at the same pace. The east led until the 2010s, with 12 riverside condominiums built in that decade against 7 opposite. Then the tide turned: since 2020, the west bank counts 9, completed or announced, against 7 on the east.

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Sources

Reflexion survey of 19 October 2026

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Iconsiam tips the west bank

On 9 November 2018, Iconsiam lit up the west bank. In Khlong San, a THB 54 billion complex raised two residential towers of 70 and 52 floors across the river. Khlong San has become the district with the most riverside condominiums in our database: 16, of which 12 have 30 floors or more.

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Sources

Reflexion survey of 19 October 2026 · Wikipedia — Icon Siam, accessed 23 September 2026

7 of 8

A metro line paid for by a developer

On 16 December 2020, a golden train began linking BTS Krung Thon Buri station to Iconsiam over 1.8 kilometres. Its THB 3.8 billion construction cost was paid in full by Siam Piwat, one of Iconsiam's developers: a metro line gifted by a shopping centre. Within 500 metres of its Charoen Nakhon and Khlong San stations, we track 8 condominiums, 5 of them with 30 floors or more; 4 were already there before it.

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Sources

Reflexion survey of 19 October 2026 · Wikipedia — Gold Line (Bangkok), accessed 23 September 2026

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The river is still a network of its own

Step aboard. The Chao Phraya Express Boat has plied the river since 1971, serving 38 piers over 32 kilometres: the river remains a network in its own right. Riverside residents know it: only 15 of the 65 waterfront condominiums, or 23.1%, are within 500 metres of a metro station, against 42.1% across Bangkok.

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Sources

Reflexion survey of 19 October 2026 · Chao Phraya Express Boat — About, accessed 23 September 2026 · Wikipedia — Chao Phraya Express Boat, accessed 23 September 2026

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Method and sources

Prices are asking prices, surveyed on 19 October 2026 in our database. For each development we take the median price per square metre of its unsold units; for an area, the median of those medians, shown only from 20 developments upward. A unit is set aside as an outlier below 10,000 ฿/m², above 1,000,000 ฿/m², above 500,000 ฿/m² on less than 30 m² or with no known floor area, above 500 M ฿, or with less than 10 m² per bedroom. The off-plan share counts developments whose status is known. Distances are measured as the crow flies. Euros are converted at €1 = 38.374 ฿ (13 September 2026).

Metro lines are drawn station to station, in straight segments: a network diagram, not the track alignment.

These are listing prices, not sale prices. No figure on this page is a promise of return.

Sources specific to this guide:

This page is market information, not legal, tax or financial advice. The rules quoted are dated; check that they still apply with a professional before any decision.

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