How to get a plumber in Korea: who to call, and how to choose one

The real first question is not how to fix it — it is who to contact

In your own country you probably knew the answer without thinking: you rent, so you message the letting agent; you own, so you call a plumber. In Korea the answer depends on the type of building you live in, and the building types are not the ones you are used to.

• An apartment complex or an officetel almost always has a building management office on site. It handles shared equipment and it is a real first port of call, not a formality.
• A villa, a low-rise multi-household building or a detached house usually has no management office at all. There is nobody in the lobby to ask, because there is no lobby. The owner is the whole system.
• If you rent, the owner and often the estate agent who arranged your lease are also part of the chain — and in practice the agent is frequently the person who actually answers.

So before searching for a company, spend one minute deciding which of those three situations you are in. It changes everything that follows, including who ends up paying.

When it is clearly a building problem: tell the management office or owner first

Some symptoms are not about your apartment at all. They are signals from the shared pipework that the whole building drains into. If you see any of these, the correct move is to report it to the management office or the owner before you hire anyone privately.

• Several households are affected at the same time — your neighbours also have slow drains, or the same smell, on the same day.
• Water rises in your drain when someone upstairs uses water. That is the shared stack pushing back, not your trap.
• The lower floors or the basement flood or back up repeatedly, especially in heavy rain.
• You can see a leak in a corridor, a stairwell, a parking area or any pipe outside the walls of your own unit.

Shared pipework is normally handled by the building, and the cost is normally not carried by an individual household. If you hire a company yourself and pay for work on shared pipes without telling anyone, you may have simply bought the building a repair. Report it first, keep the message, and let the building instruct the work.

But most of the time nobody can tell without looking — this is the part that matters

Now the harder case: only your home is affected. Here is the uncomfortable truth that almost nobody explains to foreign residents — the symptom alone does not tell you where the blockage is.

Take one single symptom: your kitchen sink drains slowly. That one symptom is consistent with at least three completely different situations.

1. 1The trap directly under your sink is packed with grease and food waste. Small job, entirely inside your home, and in a rental this is normally the occupant's side of the line.
2. 2The branch pipe that runs from your fixture into the wall is blocked a metre or two in. Still your unit, but it needs proper equipment rather than a plunger.
3. 3The shared vertical stack that your branch feeds into is restricted, and your sink is simply the first fixture to show it. Same symptom at the plughole, completely different pipe, and usually a building matter rather than yours.

Those three have three different costs and three different people responsible for paying. And you cannot tell them apart by looking into the plughole, by how bad the smell is, or by how long it has been getting worse. The only way to be sure is to send an endoscope camera down the line and physically look at where the water stops and what is holding it.

This is also why an honest company will not answer 'is it shared or private?' over the phone. If someone tells you confidently on the phone, before seeing anything, that it is definitely your pipe and definitely your bill, treat that as a warning sign rather than as expertise. Nobody can see through a wall down a phone line.

How to get it looked at without exposing yourself to a bad bill

If diagnosis has to come first, the obvious worry is that the diagnosis itself becomes the trap: someone arrives, you are now committed, and the number appears afterwards. That is avoidable. Choose a company whose terms remove that risk, and getting it looked at costs you nothing you did not agree to. These are reasonable conditions to ask any company for, in Korea or anywhere.

• Do they give you an estimate range from photos before they travel? Send a photo of the fixture and describe the symptom. A company that can give you a range in advance is a company that is not planning to invent a number in your kitchen. We quote a range from photos over KakaoTalk or WhatsApp before anyone is dispatched.
• Do they confirm the final amount and get your agreement before starting work? Not after the equipment is packed away — before it comes out of the van.
• Do they charge you if they cannot solve it? Ask this question explicitly. Our rule is simple: if we cannot clear it, you pay nothing.
• If the cause turns out to be shared or building pipework, will they tell you that and give you the evidence? This is the one people forget to ask, and it is worth more than a discount. We issue a written job report in English and Korean with photographs and endoscope footage, so you can forward it to the owner or the management office and ask them to deal with their own pipe. Without that document, a tenant very easily ends up quietly paying for a building's problem.
• Is there a warranty on the work? Ask how long, and what it covers. We give a one-year free after-service on the work we carry out.

Notice that none of these are about price. A slightly cheaper company with none of these conditions is not cheaper — it has just moved the risk onto you.

The categories of company in Korea are not what you expect

In many countries 'plumber' is one job. In Korea the trade is split, and calling the wrong category wastes a day.

A blocked drain and a leaking tap are two different phone calls. If you describe the symptom accurately when you make contact, a decent company will tell you honestly if it is not their category.

Where people search — and how to read the results

Residents in Korea typically look on Naver, KakaoMap or Google Maps, or ask in a local community group or a residents' chat. All of those are reasonable starting points. What is worth understanding is how the results are ordered.

• A large share of the results at the very top of a search are paid placements. Being first is a purchasing decision as much as a reputation.
• A listing containing your district name does not guarantee the company is based in your district, or even nearby. Area names are used widely in listings and adverts.
• Look for the advertising markers — '광고', 'Ad', 'Sponsored' — and read past them to the organic listings underneath.
• Check whether a real business address and a business registration number are published anywhere on the listing or the company's own page. A company operating properly has no reason to hide either.

None of this means an advertised company is bad. It means the ranking is not a quality score, so use it as a list of candidates and then apply the conditions in the section above.

Warning signs worth walking away from

Local customs that surprise people

• There is generally no appointment system. You contact a company and someone is usually dispatched the same day, often immediately. Waiting a week for a slot is not the norm here.
• There is no tipping culture. You are not expected to add anything on top, and nobody is offended when you do not.
• Night and weekend surcharges exist and are not unusual in the trade. Ask before the visit rather than after. We do not add a surcharge for nights or weekends.
• Check whether a quoted amount includes VAT or is stated before VAT. This single question prevents most billing surprises.
• You can ask for a cash receipt (현금영수증) or a tax invoice (세금계산서). Requesting one is completely normal.
• Some work requires the technician to walk through your home in outdoor shoes, because of equipment and hoses. If that matters to you, ask for shoe covers — it is a normal request.

If you rent, do this before anyone starts work

Send the owner or the estate agent a short written message before work begins, even if it is obviously a small job you expect to pay for yourself. It costs you nothing and it changes the conversation completely if the cause turns out to be the building's pipework.

1. 1Describe the symptom in one line and attach a photo or a short video.
2. 2Say that you are having it inspected, and give the estimate range you were quoted.
3. 3Ask them to confirm in the same chat if they want a specific company used instead.
4. 4After the visit, forward the report, the photos and the camera footage — especially if the cause was outside your unit.