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Zoning commission approves rulemaking to clarify rear-yard measurements, restore 30% allowance for accessory buildings
Summary
The District of Columbia Zoning Commission voted 5-0 in March 2025 to publish proposed rulemaking for Case No. 24-20, a text amendment clarifying how rear yards are measured and restoring an allowance for accessory buildings to occupy up to 30% of required rear yards in R, RF and RA zones.
The District of Columbia Zoning Commission voted 5-0 in March 2025 to approve proposed rulemaking for Zoning Commission Case No. 24-20, a text amendment from the Office of Planning that clarifies rear-yard measurement rules and restores an allowance for accessory buildings to occupy up to 30% of required rear yards in R, RF and RA residential zones.
The change, presented at a virtual public hearing, would add specific measurement language to Subtitle B (including B318.1, B318.2 and B318.4), and make conforming amendments to Subtitles D, E, F and I. In recommending approval, Philip Bradford, development review specialist with the Office of Planning, said the amendment codifies current administrative interpretations and is intended to reduce the need for special-exception relief when applicants seek to build detached accessory structures such as garages or accessory dwelling units (ADUs).
The amendment clarifies that required rear-yard depth is measured between the rear of the…
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