MCP For Claude Marketplace
Floor Area Ratio Calculator

Floor Area Ratio Calculator MCP Connector for Claude

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Calculate maximum buildable footprint, total floor area, and green space compliance for any plot size in seconds.

3 tools Official Updated Oct 1, 2026 Official Vinkius Partner
More Details Connect to Claude

Building Development Feasibility Analysis

The process of developing a property is complex. It requires coordinating multiple, often conflicting, zoning constraints--from how much ground area you can cover (Site Coverage) to the total bulk allowed over all floors (FAR), and ensuring enough space for water absorption (Permeability).

The Problem: Traditional planning assessments are manual, slow, and require an expert to track these three distinct metrics simultaneously. A developer might calculate a high FAR but fail because they neglected minimum permeable area requirements, or vice versa.

The Mechanism: This MCP connects your AI agent directly to the core formulas of urban planning law. It uses three specialized functions to assess viability:

  1. max_site_coverage: Determines the maximum ground footprint allowed by zoning occupancy limits for a given plot size.
  2. max_total_area: Calculates the total permitted floor area (FAR) across all stories, ensuring overall density compliance.
  3. calculate_permeability: Verifies that enough open, non-impervious space remains after accounting for building foundations and meeting minimum green space mandates.

By chaining these tools, your agent can perform a complete, multi-faceted feasibility check in one workflow, identifying the most restrictive constraint immediately.

The Advantage: You get instant, quantitative compliance checks against complex municipal codes. This moves development planning from guesswork to guaranteed calculation support.

farsite-coveragepermeabilityzoning-lawdevelopment-feasibility

3 tools expose this connector's capabilities to your AI agent.

calculate_permeability

Takes lot area, minimum permeability percentage, and optionally a building footprint area. Calculate minimum permeable area required and available buildable ground after accounting for green space requirements

max_site_coverage

Takes plot area and maximum site coverage percentage as inputs. Calculate the maximum allowable ground footprint area for building construction based on site coverage limits

max_total_area

Takes plot area, FAR percentage, and optionally a site coverage footprint area. Calculate the maximum total floor area allowed on a plot based on Floor Area Ratio restrictions

See how to talk to your AI agent using Floor Area Ratio Calculator.

We have a plot of 10,000 sq units. The zoning requires a max site coverage of 60% and a minimum permeability of 30%. What is the maximum total floor area we can build?

First, calculate the max footprint using `max_site_coverage(plotArea=10000, maxSiteCoveragePercentage=0.6)`. Next, use that result and run `calculate_permeability(lotArea=10000, minPermeabilityPercentage=0.3, grossBuildingFootprintArea=<result from previous step>)` to find the actual usable footprint. Finally, input this reduced footprint into `max_total_area(plotArea=10000, maxFARPercentage=2.5, siteCoverageFootprintArea=<usable footprint>)` for the final answer.

Given a 100 sq unit plot with an FAR of 2.5, what is our maximum total buildable area?

Run the `max_total_area` tool: `max_total_area(plotArea=100, maxFARPercentage=2.5, siteCoverageFootprintArea=null)`. This will give you a quick estimate of total density compliance.

Verify that our proposed 40% ground footprint on a 5,000 sq unit lot meets zoning standards for occupancy.

Use the `max_site_coverage` tool: `max_site_coverage(plotArea=5000, maxSiteCoveragePercentage=0.4)`. This will confirm if your proposed footprint is within the legal limit set by the zoning code.

The relationship between these constraints is complex. You must run `max_site_coverage` first to find the maximum ground footprint. Then, use this result in `calculate_permeability`. The permeability check will often be the most restrictive physical constraint because it mandates a minimum unpaved area before considering building size.

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