In the Capitol Hill Historic District The project includes the addition and interior renovation of the
Addition at 310 9th St SE, Washington
DC Department of Buildings permit B2504489: issued Jun 17, 2025 for addition work at 310 9th St SE. In the Capitol Hill Historic District The project includes the addition and interior renovation of the building to convert to a two-family flat. The design and layout will be based on the previously approved drawings. It is assumed that an NFPA 13R sprinkler system will be required for the addition and alteration of the spaces. The existing electrical, gas and water/sewer services are assumed to be adequate and will remain as is.
- Permit number
- B2504489
- 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 310 9th St SE, and what's permitted nearby
DC Department of Buildings updated its data Oct 15, 2026. We checked it Oct 15, 21:08 UTC. See the city's official records (District of Columbia, CC BY 4.0).
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