녹색건축물의 경제적 가치 연구

A Research on Economic Value of Green Building - A Perspective of Life Cycle Costs and Benefits

The government encourages eco-friendly and low-energy buildings by green building policy. Although many incentives have been in effect, the policy effectiveness is still questionable mainly because of its unsatisfactory results ut to now. When we mainly consider economic feasibility by applying green building certification in the market, investigation of the economic feasibility should be based on economic choices of private sector in the market. Therefore, economical feasibility is examined by the simulations based on Present Value(NPV) and Payback Period(PP) calculation. The cost takes added construction cost and additional fee for cretification into account. The benefit is composed of floor-area-ratio incentive, tax incentives, energy and water savings, and environmental effects. Tax incentives contains acquisition and property tax savings. When we compute PP based on the simulation, G-SEED Excellent rating and Building Energy Efficiency Level 1 buildings have 5 years of PP. They are determined to be economically feasible when we consider 20 years of building’s economic life expectancy. If we assume the case without incentives, PP results in 15 years without FAR incentive, and 16 years without all other incentives. This result indicates that the economic feasibility of the green buildings could be secured without incentives.