Menu

Close

Here's the text.

Handling of shading regulations

Last update date April 2, 2021

It is commentary about 4 "designation of areas about limit of height of building by shading and shading time" of Yokohama-shi building standard regulations Article 4 by rule of 2 Clause 1 of Building Standard Act Article 56.

Buildings subject to shading regulations and regulation time

Table about buildings subject to shading regulations and regulation time
Area or areaSubject to restrictions
Buildings
Shading
Measurement surface
Height of height
From the site boundary
5 to 10m
Shading time of range
From the site boundary
More than 10m
Shading time of range
Type 1 and 2 Low-rise Residential Area
(excluding floor area ratio of 150%)
Buildings with an eaves height of more than 7m or buildings with 3 or more floors above the ground1.5m3 hours2 hours
Type 2 Low-rise Residential Area
(floor area ratio: 150%)
4 hours2.5 hours
Areas without designation of restricted zones
(General area)
3 hours2 hours
Class 1 and 2 Middle-high-rise residential areaThe height is 10m
Buildings beyond
4.0m3 hours2 hours
Type 1 and 2 Residential Area
Quasi-residential area
4 hours2.5 hours
Neighboring commercial areas
(floor area ratio: 200%)
5 hours3 hours
Semi-industrial zone
(floor area ratio: 200%)
5 hours3 hours
Areas without designation of restricted zones
(50m area along the main street)
4 hours2.5 hours

Shading data of winter solstice (Yokohama City Standard History, 139°39'E east longitude and 355°40'N latitude)

Table of shading data for winter solstice
Great sun8:008:309:009:3010:0010:3011:0011:3012:00
16:0015:3015:0014:3014:0013:3013:0012:30Nothing
Sun Direction53.3748.2842.7636.7630.2523.2415.787.990
Magnification of shading7.0404.3993.2392.5982.2021.9491.7891.7001.672

In Yokohama City, when the shadow line is illusion, we request the coloring of the table below to facilitate the identification.

Coloring table of shade line
Time8:009:0010:0011:0012:0013:0014:0015:0016:00
ColorTeaGreenOrangeBlueRedIndigoYellowPurplePeach

Precautions for shading

  • Buildings on the same site (Article 56-2, Paragraph 2 of the Building Standards Act)
    If there are two or more buildings on the same site (if it is inseparable in terms of use), these buildings are considered to be one building, so even if the building is not covered by the application target building alone, If there is a building that is eligible in the existing building, the entire building on the premises will be subject to shading regulations, and it is necessary to consider including the existing building.
  • Special provisions for buildings in areas and areas where shading regulations are not applied (Article 56-2, Paragraph 4 of the Building Standards Law)
    Even if the building is outside the target area or area subject to shading regulations, the regulation will be applied if the shade is applied to the regulated area / area. For example, in the case of the figure below, the planned site is outside the target area (commercial area), but the shade extends to the target area for Type 1 middle- and high-rise dwellings, Type 1 dwelling, and neighboring commerce areas. It is necessary to consider the values.

    When planning a building that exceeds 10m in height in a commercial area

  • When the target building or its shading extends to areas and areas with different restrictions (Article 56-2, Paragraph 5 of the Building Standards Law)
    • If the target building spans an area or area with different restrictions, it is assumed that there is a target building in each area / area and regulation will be applied.
    • If the shading of the target building extends to areas and areas with different restrictions, regulations will be applied assuming that there is a target building in each area that creates the shade.
      For example, in the case of Figure 1 below, the shading extends to the Type 2 middle- and high-rise dwellings, Type 2 dwellings, and neighboring commerce areas, but the height is less than 10m, and the target buildings in those areas Because it does not become, it is necessary to consider only the first-class low-rise residential area.
      In addition, in the case of Figure 2 below, it will be a target building in all areas where the shading extends, so it is necessary to consider the regulatory values of each area.

      When planning a building with an eaves height of more than 7m and a height of less than 10m in height in the first-class low-rise residential area

      When planning a building that exceeds 10m in height in a nearby commercial area

For inquiries to this page

Building Guidance Division, Housing and Architecture Bureau Building Guidance Division

Phone: 045-671-4531

Phone: 045-671-4531

Fax: 045-681-2437

Email address: kc-shidotanto@city.yokohama.jp

Return to the previous page

Page ID: 571-768-578

Menu

  • LINE
  • Twitter
  • Facebook
  • Instagram
  • YouTube
  • SmartNews