South Korea is moving to scrap exterior noise standards for large apartment complexes exceeding 300,000 square meters. Under a regulatory revision proposed by the Ministry of Land, Infrastructure and Transport in June 2024, these sprawling developments would face a unified interior noise cap of 45 decibels instead. The policy surfaced during an August 27, 2024, public hearing hosted by the Korea Consumer Federation at the National Assembly Members’ Office. Its core aim: boost urban housing supply by clearing the way for new developments near busy roads and railways without mandatory soundproofing walls.
Scraping the Soundwalls
Critics, however, argue the policy compromises basic residential comfort and practically forces families to keep their windows sealed shut. Housing officials counter that the flexibility is vital to maximize scarce urban space.
From Exterior Caps to Living Room Limits
The regulatory shift rewrites long-standing architectural rules. Previously, residential complexes covering a total area of 300,000 square meters or more had to satisfy strict exterior noise limits—staying under 65 decibels during the day and under 55 decibels at night, measured outside the buildings.
Smaller complexes operated under a different metric, assessed entirely through an interior noise limit of 45 decibels or less, measured inside the living room with windows closed. The partial amendment to the Housing Construction Standards Regulation erases that exterior divide. According to the Ministry, all applicable apartment complexes will now be evaluated solely against the interior threshold.
The Hidden Costs of Sealed Windows
That reliance on closed windows has sparked fierce pushback from consumer advocates and engineering experts.
Lee pointed out a compounding danger: window-sealed living environments trap indoor pollutants like formaldehyde from building materials alongside carcinogenic substances generated during cooking. Furthermore, he cautioned that mechanical ventilation systems can introduce fresh sanitation problems if they are neglected and left uncleaned.
Prioritizing Density Over Decibels
Government defenders frame the rollback as an unavoidable response to severe housing shortages in densely populated cities. Kim Yu-jin, head of the Housing Construction Operations Division at the Ministry of Land, Infrastructure and Transport, explained that helping developers utilize space near roadways directly secures crucial housing units. She emphasized that creating even a small number of extra homes remains a top priority for the agency.
That sentiment is echoed by Lee Seong-rim, a team leader at the Korea Land and Housing Corporation (LH), who noted that many buyers willingly accept urban noise in exchange for convenient transportation access and central locations.
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