Niederhelfenschwil: observed built density
Municipality in the canton of St. Gallen · FSO no. 3423 · Parcel data as of July 2025
- Parcels
- 1’768
1 % of the canton
- Municipal zones
- 19
- Median utilization
- 47 %
Canton: 58 %
Switzerland: 10 %
- Median GFZ
- 0.09
Canton: 0.28
Switzerland: 0.09
- Median height
- 9.8 m
Canton: 9.6 m
Switzerland: 9.5 m
- Median floors
- 2.4
Canton: 2.4
Switzerland: 2.3
About Niederhelfenschwil
Niederhelfenschwil is a municipality in the canton of St. Gallen. The parcel data lists 1’768 parcels in 19 municipal zone types. The zone types with the most parcels are BauG Landwirtschaftszone (522), BauG Wohnzone WE (295) and Hinweis.Wald (286).
The median parcel is built to a volume utilization of 47 %; half of the parcels lie between 5 % and 103 %. The canton median is 58 %, so Niederhelfenschwil sits below it.
The median building height is 9.8 m at 2.4 floors, and the median floor-area ratio (GFZ) is 0.09. Parcels built in the last 20 years reach a mean volume utilization of 130 % (261 parcels), higher than the 101 % across all building years.
Parcels by municipal zone
| Zone | Parcels | Median utilization |
|---|---|---|
| BauG Landwirtschaftszone | 522 | 0 % |
| BauG Wohnzone WE | 295 | 91 % |
| Hinweis.Wald | 286 | 0 % |
| BauG Wohn-Gewerbezone WG2 | 217 | 96 % |
| BauG Wohnzone W2 | 125 | 94 % |
| BauG Kernzone K2 | 93 | 87 % |
| Hinweis.Verkehrsflaeche aB | 66 | 0 % |
| Hinweis.Verkehrsflaeche iB | 48 | 0 % |
| BauG Weilerzone | 28 | 111 % |
| BauG Zone für öffentliche Bauten und Anlagen | 20 | 91 % |
| BauG übriges Gemeindegebiet allg | 17 | 88 % |
| BauG Gewerbe-Industriezone GI A | 15 | 142 % |
| Other zones (7) | 36 | - |
Volume utilization (ratioV)
Of the 1’746 parcels with a value, half lie between 5 % and 103 %. The median is 47 % and the mean 96 %.
Share of parcels by range
- below 50 %50 %
- 50 % to below 100 %23 %
- 100 % to below 150 %15 %
- 150 % and above11 %
Floor-area ratio (GFZ)
Of the 1’746 parcels with a value, half lie between 0.05 and 0.46. The median is 0.09 and the mean 0.25.
Share of parcels by range
- below 0.5079 %
- 0.50 to below 1.0018 %
- 1.00 to below 1.502 %
- 1.50 and above< 1 %
Building height
Of the 927 parcels with a value, half lie between 8.4 m and 11.3 m. The median is 9.8 m and the mean 9.8 m.
Share of parcels by range
- below 8 m19 %
- 8 m to below 12 m69 %
- 12 m to below 20 m12 %
- 20 m and above< 1 %
Number of floors
Of the 649 parcels with a value, half lie between 1.9 and 3.0. The median is 2.4 and the mean 2.4.
Share of parcels by range
- below 24 %
- 2 to below 349 %
- 3 to below 547 %
- 5 and above0 %
Building age cohorts
Mean volume utilization of the parcels built inside each window, from all years on record down to the last five. The windows overlap: the last 20 years include the last 5.
| Built in | Parcels | Mean utilization |
|---|---|---|
| All years | 1’768 | 101 % |
| Last 60 years | 746 | 132 % |
| Last 40 years | 600 | 127 % |
| Last 20 years | 261 | 130 % |
| Last 15 years | 189 | 144 % |
| Last 10 years | 105 | 152 % |
| Last 5 years | 43 | 171 % |
Open the map at Niederhelfenschwil
How to read this page
room shows observed built density: what has been built on the parcels, not what the zoning permits. Volume utilization (ratioV) compares the built volume of a parcel with the reference volume of its municipal zone type. The floor-area ratio (GFZ) is floor area divided by parcel area; building height and number of floors are taken from the buildings on a parcel. Figures pool all municipal zones of the area. Medians and quartiles are read from bins 10 points (ratioV), 0.1 (GFZ), 2 m (height) and 1 floor wide, so they are exact to within one bin; means are exact. A parcel counts in a distribution only when the parcel data has a value for it. The floors distribution leaves out parcels without a building (0 floors).