Thai addresses, and how to arrive at the right gate.

Read a Thai address as a filing reference

In most Western cities, a street address describes a position along a line: number 42 sits between 40 and 44, and the numbers count up in one direction. Thai addresses do not work like that, and the difference is not a quirk to be worked around, it is the whole thing. The house number records a land plot registration rather than a sequential position on the street. Numbers with a slash in them, of the form 88/12, are common and mean roughly that the original plot 88 was subdivided and this is subdivision 12. Two neighbouring buildings can have entirely unrelated numbers, and a number can be several hundred metres from its apparent neighbour.

So a Thai address answers the question who owns what, correctly and completely, and answers the question how do I get there hardly at all. This is why every Thai person you deal with will navigate by landmark, by soi number and by nearest station rather than by house number, and why a driver handed a full written address will still ask you a question.

The vocabulary that unlocks it

The soi system, and why the wrong end matters

In Bangkok the soi is the working unit of navigation, and the system is orderly once you know it. Along a main road, sois are numbered outward from a starting point, with odd numbers on one side and even numbers on the other. On Sukhumvit, the odd sois run north of the road and the even sois south, and the numbers climb as you move east. Learn that one rule and the whole road becomes legible: if you are standing at Soi 22 and looking for Soi 31, you know it is on the other side of the road and further along.

The complication is length. Bangkok sois can run for well over a kilometre, they bend, they branch into yaek, and some of them connect through to the next main road while others are dead ends. A hotel on Soi 39 might be a two minute walk from the main road or a twelve minute walk and a taxi ride. Several major sois also have common names that everyone uses instead of the number: Soi 55 is Thonglor, Soi 63 is Ekkamai, Soi 3 is Nana Nuea. A driver may know the name and not the number, or the number and not the name, so it is worth knowing both for wherever you are staying.

What to actually give a driver

The full postal address is the least useful item you can offer. What works is a short package of four things, and if you have all four, no journey in Bangkok goes wrong.

• The building or hotel name, in Thai script, on your phone screen. Show it rather than say it. Pronunciation is the single biggest cause of misunderstanding and showing removes it entirely.
• The main road and the soi number. Sukhumvit Soi 24. This is how drivers hold the city in their heads.
• The nearest BTS or MRT station. Every Bangkok driver navigates by stations, and naming one immediately locates you within a few hundred metres.
• A dropped map pin, sent by LINE or shown on screen. This is the definitive answer and it overrides all ambiguity.
• Optionally, which end of the soi: near the main road, or deep in. On a long soi this saves five minutes and a U turn.

Ask your hotel to write the address in Thai on a card at check in, photograph the card, and keep the photograph somewhere you can find it in three seconds. This is the oldest trick in the region and it remains the most effective one. For a villa, a private residence or a restaurant in a difficult location, ask them to send you the pin over LINE before you set out rather than trusting the app's own listing, which may be placed on the road rather than at the gate.

Pins, and the mistake people make with them

Sharing a location pin is the most powerful tool available and it has one common failure mode: sending the pin for where you think you are rather than where you actually are. If you are on the fourteenth floor of a building with two entrances, your phone's pin may land in the middle of the block or at the wrong door. Before sending a pin to a driver who is coming to collect you, look at the satellite view, move the pin onto the actual entrance you will be standing at, and then send it with one line of text saying which entrance that is.

For a destination, the reverse discipline. Search for the venue by name rather than typing the address, because the business listing usually carries a pin someone has already corrected. Then check the satellite view for how the entrance relates to the road: a restaurant on Soi 49 with its car park entrance on a yaek is a different instruction to a driver than the same restaurant's postal address. Ten seconds of looking saves the conversation entirely.

The phrases that get you to the gate

Thai is tonal and a foreigner's attempt at a place name is often genuinely unintelligible, which is not a comment on anybody's effort. Direction words are different: they are short, common, and drivers are expecting them, so they survive imperfect pronunciation. These six will handle almost every last two hundred metres. Add khrap if you are a man and kha if you are a woman at the end of any of them; it is the politeness particle and it changes the whole tone of the exchange.

The one that earns its place above all others is pratu na, the front gate. Thai residential compounds, hotels with service entrances, hospitals with several buildings and condominium blocks with separate car and pedestrian gates all have more than one way in, and a driver who has found the address may still be at the wrong one. Khao soi, go into the soi, is the second most useful, because a driver who is unsure will often stop at the mouth of the lane and wait to be told.

Outside Bangkok, and inside buildings

Provincial and resort addresses replace the soi with the moo, the village number, and lean much harder on landmarks. A Phuket villa address will name the estate, the beach and the moo, and the practical instruction is nearly always the estate name plus a pin plus a telephone call to the guardhouse. Chiang Mai's old city is bounded by a moat with four gates and everyone navigates by the gates and the moat sides rather than by street numbers. On the islands, addresses become almost decorative and the real navigation is the beach name, the resort name and the pin.

Inside large buildings the same principle applies at a smaller scale. Bangkok malls, hospitals and office towers are big enough that saying which building, which floor and which lift bank is a meaningful part of an address. When arranging to meet someone, name a fixed physical object: a specific shop, a hotel's main lobby, the north entrance of a station. Never arrange to meet at a mall, a station or a hospital without saying where in it. The habit of naming the exact object rather than the general place is, in the end, what Thai navigation is.

Transliterations of Thai vary widely and the same road or soi may be spelled several different ways in English, which is a common source of confusion in bookings. Confirm any critical address with the hotel, venue or building management directly, in Thai script and with a map pin, rather than relying on an English rendering.

This briefing is general information, not legal, tax or investment advice. Thai rules change frequently and individual cases differ. Verify current requirements with the relevant authorities, including the Immigration Bureau, the Board of Investment, the Land Department, the Department of Business Development and the Revenue Department, and take advice on your own facts before acting.