How St. Louis Handles Zoning Overlays & Bonuses: A Practical Guide

St. Louis maintains 204 local ordinances across all categories, and 3 of those deal specifically with zoning overlays & bonuses. Here is a breakdown of what the city actually requires, what is prohibited, and where St. Louis falls on the strict-to-permissive spectrum compared to other cities.

Specific Plans Overview

St. Louis adopted a citywide Form-Based Code in 2024, replacing the 1947/1993 Euclidean zoning. The FBC organizes regulation by transect zones (T3 through T6) plus special districts, controlling building form, frontage, and use mix.

Key details: FBC adopted: 2024. Transect zones: T3 through T6. Replaces: 1993 zoning code. Authority: Title VIII.

Construction inconsistent with the FBC transect zone — wrong setback, missing frontage features, prohibited use — is denied at plan review and risks stop-work orders if built without approval.

Density Bonus Law

St. Louis offers density and height incentives within the Form-Based Code and through Tax Increment Financing or Chapter 353/99 tax abatement when a project includes affordable units, historic rehab, or LRA infill on the city's vacant land bank.

Key details: AMI threshold: 60-80% typical. Abatement statutes: Ch. 99 / Ch. 353. Trust fund source: Prop NS bonds. Bonus zones: T5 / T6.

Failure to deliver promised affordable units or design features results in clawback of tax abatement, loss of TIF reimbursement, and recorded covenant enforcement.

Transit-Oriented Communities (TOC)

St. Louis encourages transit-oriented development around MetroLink light-rail stations and high-frequency MetroBus corridors via the Form-Based Code's T5/T6 transect zones, which permit higher density and reduced parking minimums near transit.

Key details: Transit operator: Metro Transit (Bi-State). MetroLink lines: Two operating. TOD radius: ~1/4 mile. FBC zones: T5 / T6.

Projects claiming TOD parking reductions outside the qualifying transit overlay must restore parking or seek a variance, risking certificate-of-occupancy denial.

The Bottom Line

St. Louis's zoning overlays & bonuses rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming St. Louis is broadly strict or permissive.

This guide is based on St. Louis's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.