Architects

Zoning Analysis and Development Potential Assessor

Analyze a site's zoning designation to determine development potential, applicable use permissions, dimensional limits, and potential variance or conditional use requirements. This prompt helps architects organize zoning research into a structured analysis that informs early design decisions and client conversations.

This prompt takes a site's zoning designation, proposed uses, and available regulatory research and produces a structured zoning analysis covering use permissions (by right, conditional use, or not permitted), dimensional standards (setbacks, height, FAR, parking), a development potential summary showing how the proposed project compares to the zoning envelope, and an entitlement pathway assessment indicating whether the project requires ministerial or discretionary approval. The output includes an open questions list formatted as the agenda for a pre-application meeting with the planning department. It is for licensed architects and development teams conducting early feasibility analysis before committing to a design direction.

Testedclaude-sonnet-4-6ValidatedMar 2026ScopeVerify all code references and calculations independently. T…TierProfessional
AI Role
You are a licensed architect specializing in land use, zoning compliance, and de…
Models
Claude
Confidence
Professional
Constraints
Verify all code references and calculations independently. This does not replace licensed professional review.
Zoning regulations are frequently amended — all provisions must be verified against the current municipal code in effect at the time of permit application.
Overlay zones, special plan areas, and specific plans can add significant requirements not visible in the base zoning designation — confirm whether any overlays apply.
Entitlement pathway determinations are subject to planning department discretion — confirm with the jurisdiction before relying on a 'by right' determination.
Tested Models
claude-sonnet-4-6
Uncertainty
Where zoning code sections are not provided and the analysis relies on general knowledge, flag this clearly and specify which code sections must be researched before proceeding. Do not fabricate specific setback or FAR numbers.
Last updated
2026-05-28 — Published

The prompt

1,931 characters
zoning-analysis-tool.prompt
You are a licensed architect specializing in land use, zoning compliance, and development feasibility analysis.

Analyze the development potential and zoning constraints for the following site:

Site information:
- Site address: [SITE_ADDRESS]
- Zoning designation: [ZONING_DESIGNATION]
- Jurisdiction: [JURISDICTION]
- Site area: [SITE_AREA]
- Current use: [CURRENT_USE]

Proposed project:
- Proposed use(s): [PROPOSED_USES]
- Proposed building area: [PROPOSED_AREA]
- Proposed stories: [STORIES]
- Special considerations: [SPECIAL_CONSIDERATIONS — e.g., historic overlay, floodplain, transit-oriented development zone]

Zoning information available:
[PASTE RELEVANT ZONING CODE SECTIONS OR RESEARCH NOTES HERE]

Provide a zoning analysis covering:

## Use Permissions
Is the proposed use permitted by right, permitted with conditions (CUP), or not permitted in the zone? Note any similar use categories that might apply.

## Dimensional Standards
Applicable setbacks (front, rear, side), maximum height, maximum lot coverage, minimum lot area, and any step-back or bulk plane requirements.

## Floor Area Ratio (FAR) and Density
Maximum FAR and resulting maximum building area; density limits if applicable (units per acre).

## Parking Requirements
Minimum required parking by use type, bicycle parking, loading, and any parking reduction provisions.

## Development Potential Summary
Based on the dimensional standards, what is the approximate maximum buildable area? How does the proposed project compare to the maximum?

## Entitlement Pathway
Is the project approvable by right (ministerial review) or does it require discretionary approval (design review, conditional use permit, variance, rezoning)?

## Open Questions
Items that require direct confirmation with the planning department before relying on this analysis.

Note: Zoning codes are amended frequently — verify all provisions against the current municipal code.
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How to use this prompt

1

1. Gather the actual zoning code sections from the jurisdiction's online portal rather than relying on general descriptions — paste the relevant sections directly into the prompt for the most accurate analysis.

2

2. Review the entitlement pathway determination carefully — a project that requires discretionary approval has a fundamentally different risk profile than one approvable by right.

3

3. Use the open questions list as your agenda for a pre-application meeting with the planning department.

Customization tips

Add 'The site is in a [transit overlay / specific plan area / redevelopment area] — incorporate any incentive programs or additional requirements applicable to these designations.'
For multi-family residential, add 'Analyze state density bonus law applicability and any resulting incentives for affordable housing inclusion.'
Append 'The site has a [stream / creek / wetland / slope] setback — identify the setback requirements and their impact on the buildable area.'

Sample output

Mar 2026Professional
ZONING COMPLIANCE ANALYSIS — 6-Story Mixed-Use Development JURISDICTION: Portland, Oregon REVIEW DATE: March 23, 2026 ZONING DISTRICT: Central City (assumed based on project type — confirm with client) REVIEW STATUS: Preliminary PERMITTED USES: Portland's Central City zones permit mixed residential and commercial uses in multi-story buildings. Confirm the ground floor commercial use type (retail, restaurant, office, or other) against the specific zone's permitted use table. Some Central City zones distinguish between allowed commercial uses at grade versus upper floors. HEIGHT AND FAR: Central City zones in Portland have varying maximum heights and floor area ratios. At 6 stories, the project must confirm compliance with the applicable maximum height (in feet) and floor area ratio limits. Central City zones often permit significant building heights with bonus provisions for green building performance, affordable housing inclusion, or ground floor active use commitments. SETBACKS AND FRONTAGE: Central City mixed-use zones typically require buildings to be built to the street frontage (zero setback or near-zero setback) to maintain the pedestrian-active street wall. This is a design driver — the building should be designed with an active ground floor façade, transparent glazing, and a direct relationship to the sidewalk. RESIDENTIAL DENSITY: Confirm there is no dwelling unit cap applicable to the specific zone and whether inclusionary housing requirements apply. Portland's inclusionary housing policy requires a percentage of units in new residential developments above a certain size to be affordable at specified income levels — this must be understood before the building program is finalized. PARKING REQUIREMENTS: Portland's Central City zones have reduced or eliminated minimum parking requirements in many areas to support transit-oriented development. Confirm whether the project is in a parking-exempt area. If parking is provided, maximum parking limits and parking access restrictions may apply. DESIGN REVIEW: Portland requires design review for projects in Central City zones above certain thresholds. This is typically a Type II or Type III process with public notice and comment. Engage with the Portland Bureau of Development Services at pre-application conference to understand the applicable design review track and timeline. PRE-APPLICATION CONFERENCE: A pre-application conference with the Bureau of Development Services is strongly recommended before finalizing the schematic design. This provides early clarity on zoning interpretation questions, design review requirements, and any site-specific constraints. DISCLAIMER: This analysis is based on general knowledge of Portland zoning and does not constitute a formal zoning determination. All zoning compliance must be confirmed with the City of Portland Bureau of Development Services.

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Frequently asked questions

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Professional Disclaimer

This AI-generated content is for informational and educational purposes only. It does not replace the professional judgment of a licensed architect. Always verify code compliance, structural calculations, and design decisions with qualified professionals.