Buying Apartments in Seoul
The Seoul real estate market has several quirks that don’t translate from Western markets — strict government LTV/DSR rules, the unique jeonse lump-sum rental system, and the surprising way old apartments can be more valuable than new ones because of the 30-year reconstruction rule.
This page summarises what a buyer needs to know about purchasing a residential apartment in Seoul, particularly outside the regulated luxury zones.
What you actually buy
The standard 3-bedroom, 2-bathroom apartment in Korea is universally referred to as an 84-square-metre unit, commonly called a “34 pyeong” apartment. This is the most liquid, most resaleable unit size on the market.
The market average across Seoul as of 2026 is around 1.89 billion KRW for an 84m² unit, but that’s heavily skewed by Gangnam, Seocho, and Yongsan. Non-luxury districts price differently.
Decent middle-class neighborhoods
For solid, practical neighborhoods with good subway access, supermarkets, and decent infrastructure, expect:
- Purchase price: 900 million to 1.3 billion KRW (~USD 650k–950k)
- Property profile: Large-scale complexes 10–20 years old. Underground parking, security, 10–15 minute walk to subway. Not ultra-modern luxury amenities.
Examples of districts that fit:
- Eunpyeong-gu — family-friendly; 800m–1.6bn KRW range.
- Seodaemun-gu — well-connected, near major universities, steady momentum.
- Dongdaemun-gu — north of the Han River, excellent subway access, mid-priced.
- Gwanak-gu — popular with students and young professionals, more accessible prices.
These districts avoid the “luxury premium” and the heavier lending regulations on Gangnam, Seocho, Songpa, and Yongsan.
The two golden rules of Korean mortgages
LTV (Loan-to-Value)
How much of the property’s value can be borrowed:
- Regulated zones (Gangnam, Seocho, Songpa, Yongsan): capped at 40%
- Non-regulated zones: up to 70% of appraised value
DSR (Debt Service Ratio)
The stricter hurdle. Total annual debt repayments (including the new mortgage, existing loans, credit cards, etc.) cannot exceed 40% of gross annual income. Banks apply a “stressed DSR” calculation, meaning they assume higher future interest rates when checking affordability.
For most average earners, DSR — not LTV — is what caps their borrowing.
The absolute cap
As of 2025/2026, regardless of LTV or DSR, the Financial Services Commission has imposed an absolute maximum mortgage of 600 million KRW for properties priced up to 1.5 billion KRW. Even a buyer with very high income cannot borrow more than this from a bank.
What cash is needed
For a 1 billion KRW apartment:
| Scenario | Bank loan | Cash needed (down payment + fees) |
|---|---|---|
| High income, max bank loan | 600M KRW | ~435M KRW |
| Average income, DSR-limited | 400–500M KRW | ~550M KRW |
Taxes and fees add roughly 3–3.5% of the purchase price (acquisition tax, realtor fees, registry fees).
The “gap investment” alternative
Many Koreans buy investment apartments using the jeonse system instead of a mortgage. See Korean Jeonse System for the mechanics. In a gap investment:
- Property price: 1 billion KRW
- Existing tenant’s jeonse deposit: 600 million KRW (carried over to the new owner)
- Cash needed (the “gap”): 400 million KRW + fees
The buyer assumes the tenant’s lease. They own the apartment but cannot move in until the tenant’s deposit is repaid at lease end.
Rental strategies for a mortgaged investment apartment
If renting out an apartment with a substantial mortgage, traditional jeonse is risky for tenants. If the landlord defaults, the bank’s lien is paid out first; the tenant’s deposit is junior. Tenants are reluctant to give a large deposit to a landlord with a heavy bank loan.
The better strategy when the landlord doesn’t need the tenant’s deposit to fund the purchase:
- Low deposit, high monthly rent. Offer 10–20 million KRW deposit and a higher monthly rent.
- Tenants prefer this because their financial risk is minimal.
- Landlords prefer this because lower deposits legally permit higher monthly rents, generating cash flow to service the mortgage.
For an apartment with ~4% mortgage rate, achieving 3–4% rental yield via this structure is realistic.
Interest rates (2026)
With the Bank of Korea base rate around 2.50%, commercial mortgage rates are typically:
- 5-year fixed, then variable: ~3.5–3.8% (most popular product)
- Fully fixed 10–30 year: ~4.0–4.2%
Tier-1 banks: KB Kookmin, Shinhan, KEB Hana, Woori.