FSI calculator

Free FSI calculator for one rectangular plot in Tamil Nadu under TNCDBR 2019 (the Tamil Nadu Combined Development and Building Rules): the maximum and the achievable FSI, the permissible and the achievable built-up area, floors and height, the front, side and rear setbacks, plot coverage, open space reservation, and the premium FSI the road width allows with its charge as a share of the guideline value. Same engine as Build Scope and the public FSI calculator. Use for "what is the FSI", "how much can I build on my plot", "premium FSI on a 30 feet road", "how many floors on a 40x60 plot". Needs the plot area, frontage, depth and the road width the plot faces; give unit "feet" when the figures are in feet and square feet. Zone flags (cba, ews, aquifer, redhills, crz, tod) change the rules: pass what the user or an earlier zone check said, never guess them. For parking, scenarios and a drawn plan, offer the Build Scope report (paid). Cite the rule each figure comes with. Free.

post/api/v1/tools/fsi_calculator

Request

  • Base URL: https://verified.realestate
  • URL: https://verified.realestate/api/v1/tools/fsi_calculator
  • Auth: HTTP bearer

Request body

plot_areanumber required

Plot area, in square metres (or square feet when unit is feet)

frontagenumber required

Width of the plot along the road, in metres (or feet)

depthnumber required

Depth of the plot away from the road, in metres (or feet). For an irregular plot, the largest rectangle that fits.

road_widthnumber required

Width of the road the plot faces TODAY, in metres (or feet). The rules read the existing width (Rule 29(2)(b)).

road_wideningnumber

Depth of the plot the planning authority will take for a proposed road widening, in metres (or feet). Optional.

unit'metres' | 'feet'

metres (sq.m) or feet (sq.ft) for every length and area given. Default metres.

housing_unitsinteger

Homes planned. More than 16 makes it a large development. Default 8.

commercial_areanumber

Commercial floor area planned, in SQ.M whatever the unit. Over 300 sq.m makes it a large development. Default 0.

priority'builtup' | 'height' | 'coverage'

builtup = the floors that build the most floor area (default); height = the most floors the rules allow, with wider setbacks; coverage = the largest footprint, usually fewer floors.

high_riseboolean

Plan a high-rise building (over 18.3 m). Needs a 12 m road and room for 7 m setbacks; otherwise the answer falls back to a non high-rise building and says why.

cbaboolean

The plot is in a Continuous Building Area

ewsboolean

The plot is in an Economically Weaker Section area or a natham

aquiferboolean

The plot is in the aquifer recharge area

redhillsboolean

The plot is in the Redhills lake catchment

crz'none' | 'crz1' | 'crz2' | 'crz3'

Coastal Regulation Zone category of the plot. Default none.

todboolean

Within 500 m of a Metro Rail corridor (premium FSI charge halved)

zonesstring[]

The same zone flags as a list, for a form: any of cba, ews, aquifer, redhills, tod.

Response

The envelope: ok, status, data, credits_charged, balance_after, request_id

Changes

No recorded changes to this operation across all 1 revision of this API.