Green Remodeling: Enhancing the Value and Energy Performance of Existing Buildings
For new constructions, technologies such as Passive House and Active House can be
applied to realize sustainable architecture. In contrast, aging buildings can achieve sustainability through green remodeling.
As buildings age, energy efficiency declines: outdated windows and non-airtight walls lead to heat loss,
increased energy consumption, and reduced durability. Green remodeling addresses these challenges by reinforcing insulation,
replacing old windows with high-efficiency alternatives, upgrading HVAC systems, and installing renewable energy facilities.
Through this process, the building’s value is enhanced, and its energy performance is significantly improved,
resulting in reduced energy consumption.
In Korea, approximately 75% of buildings are over 10 years old, and 34% are more than 30 years old,
representing a substantial portion of the national building stock. Notable cases demonstrate the benefits of green remodeling:
■ A 50-year-old residence in Bukchon Hanok Village was transformed into a comfortable, livable home
through external wall insulation and high-performance window installations. As a result,
its energy consumption decreased by 71.8% compared to pre-renovation levels.
■The library at Hankuk University of Foreign Studies also implemented green remodeling by reinforcing insulation,
installing high-performance windows, upgrading HVAC systems, and adding solar panels.
These measures led to a 59% reduction in energy demand.
At the policy level, the Ministry of Land, Infrastructure and Transport (MOLIT) launched
a public building green remodeling initiative in 2020. The program’s impact analysis
revealed a reduction of 5,300 tons of greenhouse gases,
equivalent to planting 650,000 30-year-old pine trees in the Gangwon region.
In today’s society, it is nearly impossible to live even a single day without energy use.
Yet, to achieve carbon neutrality, reducing energy consumption in daily life has become imperative.
The key to sustainable architecture lies in improving energy efficiency within the very spaces we inhabit.
