Hpa 25-324 existing semi-detached single-family with cellar + 2-story residence to be converted to two-family
Addition at 418 4th St SE, Washington
DC Department of Buildings permit B2509719: issued Jan 6, 2026 for addition work at 418 4th St SE. Hpa 25-324 existing semi-detached single-family with cellar + 2-story residence to be converted to two-family flat (2 units). Interior remodel and addition to existing building and new unit construction. Demolition of roof, exterior rear and side walls. Exterior front wall (facade) to remain. Proposed cellar+3 stories flat. Sprinkler system NFPA 13d existing area (cellar+2 stories) 1,613 sf proposed area (cellar + 3 stories) 6,416 sf.
- Permit number
- B2509719
- Issued
- Type of work
- Addition
- Status
- Issued
- Reported cost
- Not listed
- ZIP code
- 20003
- City's category
- Construction, addition alteration repair
- City's status
- Permit issued
- Source
- DC Department of Buildings permit data (this record)
Type of work and status are our own standard labels, so permits compare across cities. The city's wording is in the "City's category" and "City's status" rows. We show costs under $100 as not listed, because filers often enter $0 or $1 when the city doesn't require a cost.
All permits at 418 4th St SE, and what's permitted nearby
The newest permit in the city's data is from Oct 8, 2026, 9 days ago. Permits issued after that won't appear here until the city publishes them.
DC Department of Buildings updated its data Oct 16, 2026. We checked it Oct 17, 14:12 UTC. See the city's official records (District of Columbia, CC BY 4.0).
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