Calculate the number of units allowed on a parcel

Usage

estimate_zoning_envelope(
  parcels,
  development_size_maximum = 300,
  standard_unit_sqft_multifamily = 1000,
  standard_parking_stall_sqft = 325,
  parking_model = "singlestory"
)

Arguments

parcels: A dataframe containing parcel-level attributes and zoning regulations
development_size_maximum: A cap on the number of units that can be developed on a parcel. Note that larger values increase the length of computation.
standard_unit_sqft_multifamily: The square footage of a standard multifamily unit
standard_parking_stall_sqft: The square footage of a standard parking space
parking_model: One of c("singlestory", "multistory"). How to model parking requirements: are stalls all on the ground floor or distributed vertically?

Value

The input parcels dataframe with an additional column, maximum_development_capacity_zoned, that contains the maximum number of units that can be developed on each parcel per zoning regulations

Examples

df = tibble::tibble(
 parcel_id = c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10),
 parcel_area_sqft = c(1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000),
 setback_front = c(10),
 setback_rear = c(10),
 setback_side = c(10),
 parcel_area_sqft_minimum = c(1000, 1000, 1000, 1000, 1000, 5000, 5000, 5000, 5000, 5000),
 units_per_parcel_maximum = c(10),
 units_per_acre_maximum = NA,
 parcel_coverage_percent_maximum = c(70),
 parcel_coverage_percent_maximum_building = c(70),
 open_space_ratio_minimum = c(0.2),
 floor_area_ratio_maximum = c(1, 1, 2, 2, 3, 3, 4, 4, 5, 5),
 height_stories_maximum = c(3, 3, 3, 3, 3, 5, 5, 5, 5, 5),
 height_feet_maximum = NA,
 parking_stalls_per_parcel_minimum = c(1),
 parking_stalls_per_unit_minimum = c(2, 2, 2, 2, 2, 1, 1, 1, 1, 1))

 estimate_zoning_envelope(
   parcels = df)
#> # A tibble: 10 × 30
#>    parcel_id parcel_area_sqft setback_front setback_rear setback_side
#>        <dbl>            <dbl>         <dbl>        <dbl>        <dbl>
#>  1         1             1000            10           10           10
#>  2         2             2000            10           10           10
#>  3         3             3000            10           10           10
#>  4         4             4000            10           10           10
#>  5         5             5000            10           10           10
#>  6         6             6000            10           10           10
#>  7         7             7000            10           10           10
#>  8         8             8000            10           10           10
#>  9         9             9000            10           10           10
#> 10        10            10000            10           10           10
#> # ℹ 25 more variables: parcel_area_sqft_minimum <dbl>,
#> #   units_per_parcel_maximum <dbl>, units_per_acre_maximum <lgl>,
#> #   parcel_coverage_percent_maximum <dbl>,
#> #   parcel_coverage_percent_maximum_building <dbl>,
#> #   open_space_ratio_minimum <dbl>, floor_area_ratio_maximum <dbl>,
#> #   height_stories_maximum <dbl>, height_feet_maximum <lgl>,
#> #   parking_stalls_per_parcel_minimum <dbl>, …