DC setbacks are established in the 2016 DC Zoning Regulations (DCMR Title 11) and vary dramatically by zone. R-1 detached residential zones require 20-40 foot front yards and 8-foot side yards, while R-4 row house zones have no side setbacks. Rear setbacks are typically 20 feet. Variances require Board of Zoning Adjustment (BZA) approval.
DC setbacks are defined in the Zoning Regulations of 2016 (11 DCMR), specifically Subtitle D (Residential House Zones) and the zone-specific subtitles. The District has no conventional 'county' — DC IS the municipality — and zoning is uniquely stratified. In R-1-A and R-1-B (detached single-family estate zones in Spring Valley, Kent, Palisades, Chevy Chase DC): 40-foot front setback, 8-foot side, 25-foot rear. R-2 (semi-detached): 25-foot front, 8-foot one-side, 20-foot rear. R-3 (row houses detached): often 20 feet front, no side setback, 20-foot rear. R-4 (row house typical Capitol Hill, Shaw): front yard equal to average of block (typically 10-15 feet), no side setbacks (party walls permitted), 20-foot rear. RA (apartment): varies by subzone. Commercial zones (MU, NC, D) have frontage lines rather than front setbacks. Heights and lot occupancies are capped additionally. Relief comes through the Board of Zoning Adjustment (BZA) for area variances or special exceptions under 11-Y DCMR. Historic districts impose additional setback expectations matching streetwall. Encroachments allowed: eaves up to 18 inches, bays and oriels up to 3 feet with limits, porches and stoops subject to subtitle D. ADUs have specific separate setback rules under 11-U DCMR 253.
Building in setback without variance: DOB stop-work order, $1,000-$5,000 fine, and order to demolish non-conforming portion. Fines can compound per day under DCMR 11-Z. Historic district overlay violation: additional HPRB fines up to $10,000.
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