Three more Seoul low-rise districts win a 1.2x floor-area bonus for single-lot rebuilds

Okin-dong shows the problem the bonus is aimed at. Of its 418 lots, 297, or 71.1%, are smaller than 90 square meters ^[4], on sloped ground cut by narrow alleys ^[5]. Take a 90 square meter lot in its Class 2 general residential zone. At the old 200% ratio it could carry 180 square meters of floor space, and at the new 240% maximum it can carry 216 ^[7][1]. The gain is 36 square meters, and on the seven in ten lots smaller than that example it is less ^[1][4].

The height relief is larger in proportion. The scenic-district cap rises four meters in both Jongno neighborhoods. That is a 25% increase in Okin-dong and, because Myeongnyun 3-ga started lower, a 40% increase there ^[8][3]. On slopes, the building-to-land ratio for underground parking or non-residential space can go to 80% from 60%, though only for the part of the basement exposed above ground ^[9]. Rooftop planting can now count for two-thirds of a site's required landscaping, up from half ^[11].

None of this pools land. Moa Town, the city's other low-rise model, combines lots to build apartment complexes ^[3]. Human Town 2.0 rebuilds on individual lots or through building agreements between neighbors, in areas where scenic and height district rules make large projects hard ^[3][2]. The support Seoul describes is free preliminary design work and consultations from an outside panel it calls Humanator ^[15]. Myung No-jun, head of Seoul's housing office, said the city "adjusted building rules so that residents of neighborhoods where development is difficult can rebuild their old homes, raising the feasibility of housing renewal." ^[17]

How much this is worth depends on choices the published rules leave open. If the architecture committee grants the full 1.2 times as a matter of routine, 240% is the number owners plan around. If it trims grants case by case, the ceiling becomes a figure few reach ^[14]. Separately, an owner who cannot fund a rebuild and break ground within 12 months of the permit loses the exemption whatever the committee decided ^[12]. The report gives detailed limits only for Okin-dong and Myeongnyun 3-ga. It does not include construction costs, an expected number of homes, or take-up figures from Sinyeong-dong and Guro-dong, the two zones designated earlier ^[7][1].

I think the change is real and small, or rather small per lot and real only for owners who can pay for a rebuild themselves. The counter-case is that on lots this tight the ratio was seldom the binding limit, and that halved setbacks and taller caps are what let a builder reach 240% at all ^[10][8]. If so, the package is worth more than 36 square meters suggests ^[1]. If the first five zones produce many permit applications carrying exemption plans, I have undersold it; if they produce few before the three-year monitoring period ends, even the modest version of this view fails ^[13][14].