Balconies have emerged as a hidden card for lifting the appeal of officetels — studio units used as either a home or an office — in South Korea's sluggish presale market. Officetels were allowed to install balconies in 2024, and units featuring them have begun appearing in earnest in the presale market. Developers are no longer simply adding free floor space: balconies are now being connected seamlessly to living rooms and fitted with floor heating, as ways of using the space evolve rapidly.
Mid- to large-sized officetels with balconies are closing the product gap with apartments, and market attention is shifting to how far balconies can be used, according to industry officials on the 9th. Competition over balcony features is expected to intensify further as conversions of knowledge industry centers into officetels are permitted and high-end officetel projects move forward in prime locations.
Officetels have long been seen as weaker than apartments of the same exclusive-use area because of smaller usable space, but balconies now allow developers to add up to 30% in separate free floor space. Products that put balconies front and center have drawn strong interest in the recent presale market. Mokdong Yoonseul Xi, which GS E&C (006360) is supplying in Seoul's Yangcheon District, offers about 16.5 square meters of balcony space free of charge on 115-square-meter units, creating the feel of 132 square meters of living space.
Harrington Square Gwacheon, due for completion in 2029, goes a step further. Floor heating has been applied across the entire multi-balcony area of 29 to 33 square meters per unit. In subscriptions in May, 206 people applied for 51 units, an average ratio of 4.04 to 1, while the 84-square-meter B type drew 19.67 applicants per unit. "Balconies developed as free floor space that raises the appeal of apartments, and now that they are allowed in officetels as well, the spatial concept has become almost the same," an industry official said. "Depending on the design, usable space can increase by about 30%."
The market is quickly pushing the boundaries of balcony use, but regulation has not kept pace. Floor heating on balconies has become the new dividing line. Current building standards for officetels contain no rule directly banning it. The Ministry of Land, Infrastructure and Transport has also said interpretations may vary depending on a balcony's structure and how it is used, without drawing a clear line. That leaves room for local governments to reach different conclusions during permit reviews on how far balcony functions may go.
Experts say that because balcony use has already entered the realm of product competition, authorities should clarify safety standards and the permitted scope rather than impose blanket restrictions. "Once balcony installation is allowed, it is not easy to uniformly block usage methods such as heating," said Park Sung-jun, president of the Seoul Architects Association. "We should move toward giving users a choice within a range that poses no problems for firefighting and safety, and establish clear standards." Park added, "If there is a need to encourage keeping balconies unexpanded, offering incentives for maintaining their original function is preferable to regulation."
