Korean Pyeong Explained: Exclusive vs Supply Area and Why 84m2 Is Called 25 Pyeong
You found the perfect apartment on a Korean listing site. One page calls it 25 pyeong. The next page, same unit, says 34 pyeong. Did the room shrink? No. Nobody lied. You just ran into the single most confusing thing about Korean real estate: there are two ways to count the same home, and both are "correct."
You found the perfect apartment on a Korean listing site. One page calls it 25 pyeong. The next page, same unit, says 34 pyeong. Did the room shrink? No. Nobody lied. You just ran into the single most confusing thing about Korean real estate: there are two ways to count the same home, and both are "correct."
This guide untangles it. By the end you'll read any Korean apartment listing like a local, know which number is legally binding, and understand why an "84㎡" home is the most-built apartment in the country.
Quick Answer
- 1 pyeong (평) = 3.3058㎡ (about 35.6 sq ft). Divide square meters by 3.3058 to get pyeong.
- Exclusive area (전용면적) is the space inside your front door — rooms, kitchen, bathroom. Supply area (공급면적) adds your share of hallways, stairs, and elevators, and runs 20–30% larger.
- 84㎡ exclusive = ~25.4 pyeong; its supply area (~110㎡) = ~34 pyeong. Same unit, two labels. The "25" counts exclusive; the "34" counts supply.
- The exclusive ㎡ on the property deed (등기부등본) is the only legally binding number. Trust it over any pyeong figure.
What Is a Pyeong, and Why Does Korea Still Use It?
A pyeong (평) is a traditional area unit. One pyeong equals exactly 3.305785㎡ — roughly the floor space of two tatami mats, or about 35.6 square feet. The unit comes from an old East Asian land-measurement system; Japan calls the same size a tsubo, and Taiwan calls it a ping (Wikipedia, Pyeong, 2024).
Here's the twist: pyeong is technically illegal for commercial use. Korea mandated the metric system and criminalized commercial use of the pyeong on July 1, 2007, with fines up to ₩500,000 (Korea Times, 2007). Listings must show square meters.
But old habits die hard. Every Korean still thinks in pyeong. So real estate sites, interior firms, and platforms like Ohouse (오늘의집) print the legal ㎡ figure and then quietly add the pyeong next to it (Wikipedia, Korean units of measurement, 2024). You'll see both everywhere. That's why you need to understand both.
The one conversion to memorize
| You have | Multiply / divide by | You get |
|---|---|---|
| Square meters (㎡) | ÷ 3.3058 | Pyeong |
| Pyeong | × 3.3058 | Square meters |
| Square feet | ÷ 35.58 | Pyeong |
A fast mental shortcut: divide ㎡ by 3.3, or just remember the common anchors below.
| Square meters | Pyeong (rounded) |
|---|---|
| 33㎡ | 10 pyeong |
| 59㎡ | 18 pyeong |
| 84㎡ | 25 pyeong |
| 114㎡ | 34.5 pyeong |
| 150㎡ | 45 pyeong |
Note that 84㎡ lands at almost exactly 25 pyeong. Hold that thought.
What's the Difference Between Exclusive Area and Supply Area?
This is the heart of the confusion. Korean listings measure a home four different ways. Two of them matter most.
Exclusive area (전용면적, jeonyong-myeonjeok) is your private space. It's everything inside your front door that only you use: the living room, bedrooms, kitchen, bathrooms, and entry hall. It does not include the balcony (Toss Feed, 2024). This is the number that decides your property tax, and it's the figure printed on your official deed.
Supply area (공급면적, gonggeup-myeonjeok) is your exclusive area plus your share of the building's shared living spaces — the elevator, stairwell, hallway, and main entrance. The formula is simple:
Supply area = Exclusive area + Residential common area
Supply area is the number most Koreans mean when they say "our place is 32 pyeong" (KB Real Estate, 2023). It's the "salesy" number because it's bigger.
The four area terms, side by side
| Korean term | English | What it includes | Where you see it |
|---|---|---|---|
| 전용면적 | Exclusive area | Your private interior, balcony excluded | Property deed, tax bills, the "real" size |
| 공급면적 | Supply area | Exclusive + residential common (halls, lifts, stairs) | The "pyeong" most listings quote |
| 계약면적 | Contract area | Supply + other common (parking, management office, gym) | New-build sales contracts (분양) |
| 서비스면적 | Service area | Balcony space, given "free" | Not in any official total; not taxed |
Two practical takeaways from this table. First, the service area (your balcony) is a freebie — it's never counted in exclusive, supply, or contract area, and it isn't taxed (Toss Feed, 2024). That's why expanding the balcony into living space (발코니 확장) is such a popular renovation — you gain usable floor without gaining taxable area. We cover that move in our Korean balcony expansion guide.
Second, the contract area (계약면적) shows up mainly when you buy a brand-new unit from a developer (분양). It's the biggest number of all because it folds in parking garages, the management office, and shared amenities. Don't confuse it with how much home you actually get.
Why Is the Same Apartment Listed as Both 25 and 34 Pyeong?
Now we can solve the riddle. Take Korea's most common unit, the 84㎡ home.
Its exclusive area is 84㎡. Convert that straight to pyeong:
84 ÷ 3.3058 = 25.4 pyeong
So if someone counts the private interior in pyeong, they call it a 25-pyeong unit.
But its supply area is about 110–114㎡, because you add roughly 26–36% for the share of hallways, the elevator, and the stairwell. Convert that to pyeong:
114 ÷ 3.3058 = 34.5 pyeong
So when a listing or a neighbor counts the supply area, the very same home becomes a 34-pyeong unit (KB Real Estate, 2023).
Nobody is lying. One person is counting only what's behind your door. The other is counting your door plus your slice of the lobby. Two honest numbers, one apartment.
The national size table
KB, one of Korea's largest banks, publishes the standard mapping. Memorize it and you'll instantly know what "30-pyeong" or "34-pyeong" really means in living space.
| Exclusive area (전용) | Common "pyeong" label (공급 기준) | Roughly equals |
|---|---|---|
| 59㎡ | 25평형 (25-pyeong) | A compact 2–3 bedroom |
| 74㎡ | 30평형 (30-pyeong) | A mid-size 3 bedroom |
| 84㎡ | 34평형 (34-pyeong) | The "national size" 3-bed |
| 114㎡ | 43평형 (43-pyeong) | A large family unit |
Source: KB Real Estate, 2023.
Notice the trap. A unit advertised as "25-pyeong" (59㎡ exclusive) is genuinely smaller than a "25-pyeong" that means 84㎡ exclusive. The pyeong number alone is ambiguous. Always ask: 25 pyeong of what — exclusive or supply? Better yet, ask for the exclusive ㎡.
Why supply area runs 20–30% bigger
The gap between exclusive and supply area is the load factor (the share eaten by common space). In modern Korean apartment towers it usually sits between 20% and 30% (IBK Blog, 2024). Tall buildings with wide hallways, big lobbies, and multiple elevators have a higher load factor; low-rise villas (빌라) tend to have a lower one. Two homes with identical exclusive areas can show different supply pyeong simply because one building has more shared space. This matters when you compare listings — a higher supply-to-exclusive ratio means you're paying for more hallway and less home.
There's a related term you'll bump into: the 공용면적 (common area), the shared portion itself. Supply area separates into your private exclusive area plus the residential common area; contract area then tacks on "other common area" like parking and the management office (Toss Feed, 2024). So the same physical building gets sliced four ways depending on what the seller wants to emphasize. A developer pushing a new tower will quote the big contract area. A resale agent will quote the supply pyeong. A tax office cares only about exclusive. Knowing which lens you're looking through is half the battle.
One more habit worth building: when an agent quotes a supply pyeong, ask for the exclusive ㎡ in the same breath. A 24-pyeong supply unit and a 26-pyeong supply unit might have nearly identical exclusive areas if their load factors differ. The pyeong gap is real on paper but meaningless in your living room.
Why Is 84㎡ Called the "National Size" (국민평형)?
If you browse new Korean apartments, you'll see 84㎡ over and over. Koreans call it 국민평형 — the "people's size" or "national size." There's a real legal reason behind it, and it's a great story.
Korean law defines a 국민주택규모 (national housing scale) as a home with an exclusive living area of 85㎡ or less (or 100㎡ in some non-metropolitan rural areas) (Korea Land Use Dictionary, eum.go.kr, 2024). Units at or under this 85㎡ ceiling get major perks. The supply and construction of national-scale housing is exempt from VAT under the Special Taxation Restriction Act (조세특례제한법), and buyers get easier access to subsidized mortgages, newlywed special supply, and other government housing programs (National Tax Service, via Intn.co.kr, 2024).
So where did 85㎡ come from? It dates to 1973, when the Park Chung-hee government, having enacted the Housing Construction Promotion Act (주택건설촉진법) in 1972, set the national housing scale by enforcement ordinance the following year — a standard size for a typical four-person family with three bedrooms, a living room, and a bathroom. The figure was essentially 25.7 pyeong, and 25.7 × 3.3 ≈ 85㎡ (Sedaily, 2024). That promotion act was later fully revised into the current Housing Act (주택법) in 2003, yet the 85㎡ line has survived for over 50 years as the benchmark for public housing and tax breaks (Bizhankook, 2024).
Here's the clever part. Developers want every tax and subsidy advantage, so they build right up to — but never over — the 85㎡ ceiling. The standard maximum they settled on is 84㎡ exclusive. That single number now dominates Korean new construction, which is why "84" and "국민평형" are almost synonyms, and why its 34-pyeong supply label is the most quoted size in the country.
How Do I Read a Korean Listing Without Getting Fooled?
A few field rules keep you safe whether you're renting, buying, or hiring an interior firm.
Find the exclusive ㎡ first. It's the honest size of your living space, and it's the only legally binding figure — it appears on the property deed (등기부등본), which always lists exclusive area (Safehomes, 2024). Everything else is marketing.
Treat the pyeong number as a label, not a measurement. When a listing says "34-pyeong," that's almost always supply area. Mentally subtract the common space: a 34-pyeong unit is really about 25 pyeong (84㎡) of private floor.
Ask about the balcony. Because the balcony is "free" service area, an expanded-balcony unit feels far bigger than its exclusive ㎡ suggests. A post-2005 apartment with a legally expanded balcony can gain several extra usable pyeong that never show up in the official numbers.
Watch the load factor. If a listing brags about a huge supply pyeong but a modest exclusive ㎡, you're buying hallway. Compare the two figures: exclusive ÷ supply tells you how much of your "size" is actually yours.
Convert before you furniture-shop. Korean furniture and interior product pages on platforms like Ohouse size rugs, beds, and sofas to pyeong-based rooms. Knowing your real exclusive pyeong stops you from buying a sofa built for a 34-pyeong home that won't fit your 84㎡ reality. If you're new to that platform, start with our explainer on how Ohouse became Korea's interior inspiration hub.
For a deeper look at how Korean floor plans are laid out (the "bay" count, or 베이), see our Korean vs American apartment floor plans comparison. And once you know your real size, our breakdown of Korean apartment interior budgets by square meter helps you estimate renovation costs against the exclusive ㎡ — the number that actually matters for materials.
Worked Example: Furnishing a 59㎡ vs an 84㎡
Say you're choosing between two new-builds. Listing A is "25-pyeong." Listing B is "34-pyeong." Same building, same view. The salesperson treats them as one notch apart. They're not.
- Listing A — 59㎡ exclusive (25평형 supply). Real private space: 17.8 pyeong. Comfortable for a couple or a small family. Two real bedrooms plus a small third room.
- Listing B — 84㎡ exclusive (34평형 supply). Real private space: 25.4 pyeong. That's about 43% more usable floor than Listing A, not "9 pyeong more." Three proper bedrooms, room for a dining table.
The supply-pyeong labels (25 vs 34) make the gap look like 36%. The exclusive areas (59 vs 84) show the truer story. Always run the comparison on exclusive ㎡, then decide. Korean buyers who renovate after purchase plan their layouts against exclusive area for exactly this reason — see how Korean buyers renovate after purchase.
The same logic guides your budget. Renovation quotes from Korean interior firms scale with the exclusive area, because that's the floor and wall you actually finish — not the shared stairwell. So if a contractor's estimate seems high "for a 34-pyeong place," remember you're really finishing 25 pyeong of floor, and price accordingly. Quoting the supply number to a contractor can lead to inflated estimates. Anchor every conversation to the exclusive ㎡, the one figure on your deed, and the math on both rent and renovation suddenly lines up.
A quick gut check before you sign anything: write down three numbers — the exclusive ㎡, the supply pyeong, and the balcony status. Those three tell you the real size, the marketing size, and the hidden bonus space. If a listing won't give you the exclusive ㎡, that silence is itself a red flag.
Frequently Asked Questions
Is the pyeong figure on a listing the exclusive area or the supply area? Almost always the supply area (공급면적). When a Korean listing or neighbor says "32 pyeong," they mean the supply figure, which includes your share of hallways and elevators. To find the real interior size, look for the exclusive area (전용면적) in square meters and divide by 3.3058. The exclusive number is the one that decides your tax and shows on your deed.
How do I convert square meters to pyeong quickly? Divide the square meters by 3.3058. For a fast estimate in your head, divide by 3.3. So 84㎡ ÷ 3.3 ≈ 25.4 pyeong, and 59㎡ ÷ 3.3 ≈ 17.9 pyeong. Going the other way, multiply pyeong by 3.3 to get square meters. One pyeong is about 35.6 square feet if you think in imperial.
Why is an 84㎡ apartment so common in Korea? Korean law caps the "national housing scale" (국민주택규모) at 85㎡ of exclusive area. Units at or below that line get a 10% VAT exemption for builders plus access to subsidized mortgages and government housing programs. Developers build right up to the limit at 84㎡ to capture every benefit, which is why it became the default "national size" (국민평형) and the most-built apartment in the country.
Does the balcony count toward the apartment's size? No. The balcony is "service area" (서비스면적) and isn't included in exclusive, supply, or contract area, and it isn't taxed. That's why expanding the balcony into living space adds real usable floor without raising the official size or your property tax. A unit with an expanded balcony lives bigger than its exclusive ㎡ suggests.
Which area number should I trust when buying or renting? Trust the exclusive area (전용면적) in square meters, taken from the property deed (등기부등본). It's the only legally binding figure and reflects the actual private space you'll live in. Use supply area only to understand what a "pyeong" label means, and treat contract area (계약면적) — common in new-build sales — as the developer's biggest, most generous count.
Related Reading
- Korean Apartment Floor Plans vs American: A Translated Comparison
- Korean Balcony Expansion (발코니 확장): Costs, Rules, Pros and Cons
- Korean Apartment Interior Budgets by Square Meter
- How Ohouse Became Korea's Interior Inspiration Hub
- How Korean Buyers Renovate After Purchase
Sources: KB Real Estate (2023), Toss Feed (2024), Sedaily (2024), Bizhankook (2024), IBK Blog (2024), National Tax Service / Intn.co.kr (2024), Safehomes (2024), Korea Land Use Dictionary (2024), Korea Times (2007), Wikipedia: Pyeong (2024), Wikipedia: Korean units of measurement (2024).
This guide is for general information on Korean apartment terminology and is not legal, tax, or real estate advice. Verify exclusive area against the official property deed (등기부등본) and consult a licensed Korean real estate agent (공인중개사) before signing any lease or purchase.
-- The Self Interior Team