Balconies are becoming a major selling point in South Korea's officetel market after their installation became permissible in 2024. Developers are merging balconies with living rooms, adding floor heating and designing units to resemble conventional apartments. Balconies can provide up to 30% in separate free floor space, helping address officetels' traditional disadvantage of having less usable space than apartments. Mokdong Yunseul Xi, supplied by GS E&C (006360) in Seoul's Yangcheon District, offers about 16.5 square meters of balcony space at no extra charge on units with 115 square meters of exclusive-use area, creating a space that feels like 132 square meters. Harrington Square Gwacheon, scheduled for completion in 2029, applies floor heating across 29 to 33 square meters of multi-balcony space per unit and drew 206 applicants for 51 units in its May subscription round. Competition is expected to intensify as knowledge industry centers can be converted into officetels and high-end projects advance in prime locations. Regulations do not directly prohibit heated officetel balconies, while ministry guidance leaves interpretations dependent on structure and use, allowing local governments to reach different permitting decisions. Industry experts are calling for clear safety standards and defined limits rather than blanket restrictions.