In Gwangmyeong, 20,000 units filed for rebuild at once and about 30 listings set the price

Roughly 20,000 apartments across the Haan Jugong complexes 1 through 12 in Gwangmyeong, Gyeonggi Province, have all moved toward rebuilding simultaneously, making the estate the main focus of the property market on Seoul's southwestern edge ^[1]. The result is a price move of 200 million to 300 million won in less than a year, transacted on almost no available stock ^{[2] [3]}.

Start with the float, because it is the whole story. Analysts quoted by Seoul Economic Daily put actual listings at two or three units per complex ^[3]. Across twelve complexes that is somewhere between 24 and 36 units for sale against about 20,000 in total, or roughly 0.1 to 0.2 percent of the estate ^[1]. A record print of 1.12 billion won for a 76-square-meter unit in complex 12 ^[2] is therefore a statement about the last seller, not about 20,000 households. The move itself is not small in proportional terms: a gain of 200 million to 300 million won implies a starting price of 820 million to 920 million won, so the marginal unit repriced by roughly 22 to 37 percent ^[5].

The tell that this is entitlement pricing rather than housing pricing is in the per-square-meter numbers. The 1.12 billion won print works out to about 14.7 million won per square meter ^[2]. Complex 3's 49-square-meter units, which went from the 500 million won range last October to 730 million won in June ^[4], a gain of roughly 230 million won or about 46 percent in eight months ^[4], now clear at about 14.9 million won per square meter ^[3]. The smaller, older, less liveable unit is the more expensive one per unit of area. Buyers are not paying for floorspace. They are paying for a claim on a future allocation.

What underwrites that claim is a rule change that has not happened yet. The prospect of an upzoning from Type 2 to Type 3 general residential and a floor area ratio of up to 330 percent is what is seen as making the projects financially viable ^[5]. The cost side is the part still unpriced: members' contribution charges and relocation plans are cited as the variables that will decide how fast anything moves, and analysts say buyers should check each complex's project stage and estimated contribution level individually ^[6].

For a sense of how long the gap between announcement and delivery can run, look at Yongsan. The Ministry of Land, Infrastructure and Transport said it would review the entire Yongsan Park site as a housing supply candidate, raising expectations of up to 40,000 units ^[7], across a developable area of 3.93 million square meters, 1.36 times the size of Yeouido ^[10]. The prevailing view is that actual supply is years away, given the need to revise the special act on developing Yongsan Park, objections from the Seoul city government and Yongsan district, the return of U.S. military land and soil-contamination cleanup ^[8]. Mayor Oh Se-hoon has said he cannot agree to even one centimeter ^[9].

Watch the first published contribution-charge estimates at Haan Jugong, since that is where a 230 million won paper gain meets a cash call ^{[6] [4]}. Watch whether the upzoning is actually granted at 330 percent ^[5]. And watch the tax file: 46.8 percent of respondents in the government's pre-announcement survey favored keeping the long-term holding deduction against 53.2 percent for switching ^[11], the plan omitted a separate threshold for ultra-high-priced homes despite 51.2 percent backing one at 2 or 3 billion won ^[12], and analysts expect the 2029 residency-based deduction switch to be reopened in parliament ^[13].