D.C. Mun. Regs. tit. 11, § 2604
2604.1 Inclusionary developments subject to the provisions of this Chapter may construct up to twenty percent (20%) more gross floor area than permitted as a matter of right ("bonus density"), subject to all other zoning requirements as modified herein and in the zoning overlay provisions of Chapters 11–16, 18, and 19.
2604.2 Inclusionary developments in zoning districts listed in the chart below may use the following modifications to height and lot occupancy in order to achieve the bonus density:
| Base Zone | Matter-of-Right Zoning Constraints | IZ Zoning Modifications | |||
|---|---|---|---|---|---|
| Lot Occupancy | Zoning Height (feet) | Zoning FAR | Lot Occupancy | Height (feet) | |
| R-5-E | 75% | 90 | 6.00 | 90% | 90 |
| CR | 75% | 90 | 6.00 | 80% | 100 |
| C-2-A | 60% | 50 | 2.50 | 75% | 50 |
| C-2-B | 80% | 65 | 3.50 | 80% | 70 |
| C-2-C | 80% | 90 | 6.00 | 90% | 90 |
| C-3-A | 75% | 65 | 4.00 | 80% | 65 |
| W-1 | 80% | 40 | 2.50 | 80% | 50 |
| W-2 | 75% | 60 | 4.00 | 75% | 80 |
| W-3 | 75% | 90 | 6.00 | 80% | 100 |
| SP-1 | 80% | 65 | 4.00 | 80% | 70 |
| SP-2 | 80% | 90 | 6.00 | 90% | 90 |
2604.3 Inclusionary developments in R-2 through R-4 zoning districts may use the minimum lot dimensions as set forth in the following table:
| Base Zone | IZ Zoning Modifications | ||
|---|---|---|---|
| IZ Min. Lot Area (square feet) | Min. Lot Width (feet) | Min Lot Width (feet) Special Exception | |
| R-2 Detached | 3,200 | 40 | 32 |
| R-2 Semi-Detached | 2,500 | 30 | 25 |
| R-3 | 1,600 | 20 | 16 |
| R-4 | 1,500 | 18 | 16 |
SOURCE: Final Rulemaking published at 53 DCR 7020 (August 25, 2006); as amended by Final Rulemaking published at 55 DCR 2616 (March 14, 2008); as amended by Final Rulemaking published at 57 DCR 9735 (October 15, 2010).