Journal of Korea Planning Association (국토계획)

Korea Planning Association (대한국토도시계획학회)
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Urban Tissue, Zoning and Achieved Floor Area Ratio (A-FAR) - Focused on Developed Floor Area Ratio (D-FAR) Compared to the Legal Floor Area Ratio (L-FAR) in Residential Area and Commercial Area in Seoul -

용적실현비(A-FAR)에 영향을 미치는 용도지역별 대지특성에 대한 분석 - 서울시 주거지역 및 상업지역에서 법정용적률(L-FAR) 대비 실현된 용적률(D-FAR)을 중심으로 -

  • Kim, Soo Hyun (Graduate School of Urban Studies Hanyang University) ;
  • Choi, Chang Gyu (Graduate School of Urban Studies Hanyang University)
  • Received : 2018.10.20
  • Accepted : 2019.03.22
  • Published : 2019.04.30
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Abstract

The Legal Floor Area Ratio (L-FAR) has been used as a major urban planning tool for efficient management of land use, landscape, and density. The Developed Floor Area Ratio (D-FAR) in each parcel is realized by such physical and institutional factors as urban tissue, local characteristics, and zoning with the L-FAR. The Achieved Floor Area Ratio (A-FAR), the ratio of the D-FAR to the L-FAR, is the relationship between realized density and the intended/desired outcomes of the regulations. The A-FAR informs the efficiency of L-FAR and its effect on parcels, and is an indicator of the demands of real estate developments under the zoning regulation. This study used detailed data of each parcel's characteristics, including parcel size, road width, and the number of roads bordered by a parcel, to identify the influencing factors on A-FAR. This analysis confirmed that the parcel size has a non-linear negative effect in the residential zone but a linear positive effect on A-FAR in the commercial zone. The width of the parcel's frontage in the commercial zone has a positive effect on the value, while in the residential zone the narrower width has higher A-FAR. In Seoul, the residential zone has higher A-FAR than the commercial zone, which means that the former has a relatively higher development pressure but a lower designated L-FAR. This result reflects that Seoul's residential zone absorbs the demand of commercial uses because of the significant permitting of mixed land use and has high-density residential buildings.

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