Building Code Cheatsheet
Quick reference for zoning districts, height limits, setback requirements, and sun shadow regulations — free building code reference
Zoning Districts
| Zone | Height Limit | Coverage | FAR | Article |
|---|---|---|---|---|
| Cat.1 Low-Rise Res. | 10m/12m | 30-60% | 50-200% | 法48条1項 |
| Cat.2 Low-Rise Res. | 10m/12m | 30-60% | 50-200% | 法48条2項 |
| Cat.1 Mid-High Res. | - | 30-60% | 100-300% | 法48条3項 |
| Cat.2 Mid-High Res. | - | 30-60% | 100-300% | 法48条4項 |
| Cat.1 Residential | - | 50-80% | 100-500% | 法48条5項 |
| Cat.2 Residential | - | 50-80% | 100-500% | 法48条6項 |
| Quasi-Residential | - | 50-80% | 100-500% | 法48条7項 |
| Neighborhood Commercial | - | 60-80% | 100-500% | 法48条8項 |
| Commercial | - | 80% | 200-1300% | 法48条9項 |
| Quasi-Industrial | - | 50-80% | 100-500% | 法48条10項 |
| Industrial | - | 50-60% | 100-400% | 法48条11項 |
| Exclusive Industrial | - | 30-60% | 100-400% | 法48条12項 |
Setback Regulations
Road Setback法56条1項1号
Building height limited by slope from opposite side of fronting road
H ≤ L × 1.25 (Residential) / H ≤ L × 1.5 (Other)
Adjacent Land Setback法56条1項2号
Slope restriction applied above certain height from adjacent lot boundary
H ≤ 20m + (D × 1.25) Res. / H ≤ 31m + (D × 2.5) Other
North Side Setback法56条1項3号
Slope restriction from north boundary (low-rise & mid-high residential zones)
H ≤ 5m + (D × 1.25) Low-rise / H ≤ 10m + (D × 1.25) Mid-High
Sun Shadow Regulations
| Zone | Measure Height | 5-10m range | Over 10m | Article |
|---|---|---|---|---|
| Cat.1 Low-Rise Res. | 1.5m | 3h/4h/5h | 2h/2.5h/3h | 法56条の2 |
| Cat.2 Low-Rise Res. | 1.5m | 3h/4h/5h | 2h/2.5h/3h | 法56条の2 |
| Cat.1 Mid-High Res. | 4m | 3h/4h/5h | 2h/2.5h/3h | 法56条の2 |
| Cat.2 Mid-High Res. | 4m | 3h/4h/5h | 2h/2.5h/3h | 法56条の2 |
| Cat.1 Residential | 4m | 4h/5h | 2.5h/3h | 法56条の2 |
| Cat.2 Residential | 4m | 4h/5h | 2.5h/3h | 法56条の2 |