Reading a Korean address: roads, side streets, and the tower called 101-dong

The guesthouse message comes the night before you fly. It has a line of Korean, a line of English and a door code. The English reads like a riddle: a road name, a number, another number with 'gil' attached, and a word in brackets. At the taxi rank outside Seoul Station the driver looks at the English, shakes his head and points at your phone for the Korean. Korean addresses are not difficult. They follow a logic that nobody explains to visitors, and once you can read it, you stop getting lost two blocks from your door.

Two addresses for the same door

Korea uses two address systems side by side. The doro-myeong juso (도로명주소), or road-name address, gives the street and the building's position along it. The older jibeon juso (지번주소), or lot-number address, gives a neighbourhood, called a dong (동), and a land-parcel number. That number tells you which patch of ground the building stands on. It does not tell you which street the building faces. Booking platforms, delivery apps and official forms use the road-name version. A parcel slip on a shop counter, a hand-painted sign at a family restaurant or an older relative's memory may still give the lot number.

Neighbourhood names are still in use. A road-name address often ends with the dong in brackets, such as (Yeonnam-dong), and sometimes the building's name as well. This helps people who still think in neighbourhoods. Older layers of the city also survive in station names. At Jongno 3-ga (종로3가) and Euljiro 3-ga (을지로3가), the ga (가) counts sections of a long downtown street. It comes from an earlier way of dividing central Seoul, and you will see it every time you change lines there.

Daero, ro, gil: the street's size is in its name

The ending of a road's name tells you how big it is. A daero (대로) is a boulevard of eight lanes or more, like Sejong-daero (세종대로) running past Gwanghwamun. A ro (로) has between two and seven lanes. A gil (길) is anything smaller. In practice that means a lane or alley, often with no pavement and with scooters parked across half of it.

Side streets take their name from the road they branch off, followed by a number: Jahamun-ro 7-gil, for example, is a lane off Jahamun-ro (자하문로). The number tells you roughly where along the main road the lane branches off, and odd and even numbers sit on opposite sides. In Busan and many cities in Gyeonggi you will also see beon-gil (번길), which numbers the lane after the building at the corner where it branches off. The practical point is the same in both cases. A gil address usually means the last stretch is on foot. It often makes sense to get the taxi to drop you on the main road and walk in, rather than watch it reverse out of a dead end.

Numbers that measure distance

Building numbers start at one end of a road and go up as you move along it. Odd numbers are on the left and even numbers on the right as you walk towards the higher numbers. The numbers are assigned by position, at intervals of roughly twenty metres, so multiplying a building number by ten gives a rough distance in metres from the start of the road. Number 120 is a little over a kilometre in, and 121 is roughly across the street from it. Gaps are normal. A wide building between 14 and 20 simply uses up the numbers in between.

At junctions, look for the blue road-name sign, the doro-myeongpan (도로명판). It gives the road's name in Korean and English, with an arrow and the range of building numbers in that direction. Standing on a corner, compare your number with the sign and choose the way the numbers are going. It takes about five seconds and saves the slow loop around the block that a drifting map pin tends to cause.

The plate by the door, and which floor you need

Once you are on the right stretch, look for the geonmul beonhopan (건물번호판), a small plate near the entrance. It shows the road name and building number, often with English underneath. It is the most reliable check you have, because a building's name can change when a business moves and its number does not.

After that, the address goes vertical. Cheung (층) means floor and ho (호) means unit or room, so 2층 201호 is room 201 on the second floor. Ground level is 1층, counted the American way, which catches out visitors used to British floor numbers. Jiha (지하) means basement, and lift buttons usually show it as B1 or B2. Many small restaurants and practice studios are on these floors, with the entrance down a narrow stair at the side of the building rather than at the front.

101-dong, 1203-ho: finding a flat in a complex

Rented flats are often inside a danji (단지), an apartment complex of identical towers behind a gate. Here the character 동 means building rather than neighbourhood, which is the most common source of confusion in this whole system. 101동 is tower 101, and the number is usually painted in large figures high on the wall where you can see it from the gate. 1203호 is unit 03 on the twelfth floor.

Getting inside usually takes two steps. First you pass the complex gate, often next to a guard booth called the gyeongbisil (경비실). Then you reach the tower's shared entrance, the gongdong hyeongwan (공동현관), which has a keypad. The host's code sometimes ends with the star or hash key, and the message may not mention it. A large complex can mean several minutes' walk from the gate to the right tower, and some complexes keep cars off the ground level entirely. A map board at the gate shows the towers' layout.

101동 앞에 세워 주세요.

That line, baek-il-dong ape sewo juseyo, means 'please stop in front of building 101'. It is worth having ready when a taxi turns in through the complex gate. Show it on your screen next to the full address and the driver can head for the right tower rather than the main entrance.

Before you land, and at the kerb

Ask your host or hotel for the address in Korean script. If possible, get it in both systems, plus the building's name and the nearest subway exit. Paste the Korean into Naver Map (네이버 지도) or KakaoMap (카카오맵) rather than typing the romanised version. Romanisation varies (Jongno or Chongno, Sinchon or Shinchon), and many cities have roads with the same name. Jungang-ro (중앙로), for example, turns up all over the country. The government's official road-name address search converts between Korean and English and between the two systems, so use it if an address looks inconsistent.

For a gil or danji address, try to arrive in daylight the first time. Lanes that are easy to read at noon get much harder after dark, when the building plates are in shadow. The mistake to avoid is trusting a map pin produced from an English address alone. It can land on the main road, at the complex gate or in a different district altogether. Before you get in the taxi, check that the dong in brackets on your screen matches the one your host gave you.