/zoning-and-codes

name: zoning-and-codes
description: >-
  Analyze zoning regulations and generate form-based codes, including
  Euclidean zoning analysis, performance zoning parameters, transect-based
  coding, building envelope controls, and development standard specification.
  Use when the user asks about zoning, building codes, development standards,
  setbacks, height limits, FAR regulations, use permissions, overlay zones,
  special districts, or form-based codes. Also use when the user needs to
  create a zoning framework for a masterplan, understand what can be built on
  a site, or translate a design into regulatory language.

Zoning and Codes Skill

This skill provides comprehensive zoning analysis and form-based code generation capabilities for urban design and masterplanning projects. It covers the full spectrum of zoning approaches from conventional Euclidean zoning through transect-based SmartCode, and provides detailed workflows for translating design intent into enforceable regulatory language. The skill draws from the SmartCode, Miami 21, Denver Form-Based Code, and international best practices in development regulation.

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1. Zoning System Types

Use the following comparison matrix to select the appropriate zoning approach for a given project context. Each system has distinct strengths and is suited to different planning objectives.

Comparison Matrix

| Type | Primary Controls | Strengths | Weaknesses | Best For | |------|-----------------|-----------|------------|----------| | **Euclidean** | Use categories (residential, commercial, industrial) + dimensional standards (setback, height, lot size, FAR) | Simple to administer; predictable outcomes; well-understood by developers and communities; extensive legal precedent | Rigid separation of uses enforces automobile dependence and sprawl; does not address building form or public realm quality; encourages lowest-common-denominator development | Stable suburban areas; low-density residential neighborhoods; industrial zones; contexts where predictability is the primary goal | | **Performance** | Impact metrics (traffic generation, noise levels, shadow/daylight access, stormwater runoff, air quality emissions) | Highly flexible; focuses on outcomes rather than prescriptions; encourages innovation in design solutions; can accommodate unforeseen uses | Complex to administer and enforce; requires technical expertise for review; unpredictable physical outcomes; challenging for community members to understand | Mixed-use areas where impact matters more than form; transitional zones between incompatible uses; innovation districts; areas with complex environmental constraints | | **Form-Based** | Building form (height, setback, coverage, FAR), frontage types, building types, public space standards | Produces predictable physical form and high-quality public realm; enables mixed-use by right; regulates what matters most to communities (physical character); illustrated and accessible | Requires design expertise to draft and administer; less familiar to many planning departments; can be perceived as overly prescriptive for building design; initial adoption requires education | New development and infill projects; downtown revitalization; transit-oriented development; areas where physical character is the primary concern; urban renewal zones | | **Transect-Based (SmartCode)** | Rural-to-urban gradient zones (T1-T6) with calibrated standards for each zone; integrates thoroughfare, civic space, and building standards | Holistic and context-sensitive; addresses the full range of human settlement patterns; internally consistent; treats urbanism as an ecology; comprehensive framework | Requires paradigm shift from conventional zoning thinking; initial calibration to local context is labor-intensive; may not fit jurisdictions with highly irregular development patterns | Comprehensive plan implementation; greenfield master-planned communities; complete code replacements; jurisdictions ready for a fundamentally different approach to regulation | | **Hybrid** | Combination of two or more approaches (e.g., form-based for downtown + Euclidean for suburban residential + performance for industrial/environmental overlay) | Balanced approach; can tailor regulation to distinct character areas; pragmatic; easier political adoption by preserving familiar systems where they work | Can be complex to navigate; risk of internal contradictions between systems; may confuse applicants moving between zones with different regulatory logic | Most real-world applications; jurisdictions transitioning from Euclidean to form-based; cities with diverse character areas requiring different regulatory approaches |

Selection Decision Tree

1. Is the project a comprehensive code replacement for an entire jurisdiction? --> Consider **Transect-Based (SmartCode)** 2. Is the project focused on a specific plan area (downtown, corridor, TOD)? --> Use **Form-Based Code** for the plan area 3. Does the area have complex environmental constraints (floodplain, noise, contamination)? --> Layer **Performance** standards as an overlay 4. Are existing suburban residential areas stable and not targeted for change? --> Retain **Euclidean** zoning for those areas 5. For most real-world jurisdictions --> Use a **Hybrid** approach combining the above as appropriate

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2. Transect Zone Specifications

The Transect is a cross-section of the human habitat ranging from the most natural (T1 Natural Zone) to the most urban (T6 Urban Core Zone). Each zone has a distinct character defined by calibrated standards for density, building form, frontage, street type, and permitted uses. The following table provides complete specifications for all six zones plus Special Districts (SD).

Complete T1-T6 Parameter Table

| Parameter | T1 Natural | T2 Rural | T3 Sub-Urban | T4 General Urban | T5 Urban Center | T6 Urban Core | |-----------|-----------|----------|--------------|----------------