378 M Street Southwest, Washington
Estimated number, map position is approximatetechnical data · neighborhood and transit
Quick answers
- Does 378 M Street Southwest have open permits or code violations?
- DC Department of Buildings lists 4 permits, 4 not closed, and 0 violations.
- What is the 2026 conforming loan limit in District of Columbia?
- $1,249,125 for a single-unit home, per FHFA. Larger loans are jumbo loans.
- Is radon a problem here?
- EPA radon zone 2, moderate potential.
- What natural disasters is 378 M Street Southwest at risk for?
- FEMA's National Risk Index rates the area relatively moderate overall, with elevated inland flooding risk.
Permits and code violations
4 permits not closed out. Unfinished permits pass to the next owner.
- Supplemental Aug 2026Permit issued
- Supplemental Aug 2026Permit issued
- Construction Sep 2025Permit issued
Site of tiber island in the commission of fine arts jurisdiction area 1. concrete repairs: balcony top surface partial depth, full depth, edge, and overhead soffit repairs along with vertical repair patch locations on the parapet walls. 2. balcony waterproofing membrane: install new sealant at balcony perimeter, balcony concrete cracks, and railing posts/baseplates. prepare balcony concrete deck and apply new urethane waterproofing membrane. 3. balcony soffit acrylic coating: power wash and prepare balcony soffits. apply acrylic coating to soffits and balcony undersides. 4. elastomeric parapet wall coating: power wash and prepare balcony parapet walls. install new acrylic-based elastomeric coating. 5. elastomeric sealant: install new urethane sealant at areas described in #1 concrete repairs above, as well as fa?ade to balcony underside, fa?ade to balcony parapet walls, and vertical joints between juliet balcony concrete slab edges. 6. balcony scupper extensions: install stainless steel scupper extensions at balconies. 7. metal balcony railings: paint juliet railings, replacement of railing post sections with significant loss as identified by consultant (see detail 7/a003), and fill railing posts with pourable sealant up to newly drilled hole in railing post.
- Supplemental Jul 2024Expired
DC Department of Buildings
Safety and environment
FEMA natural hazard risk
Relatively Moderate
Highest for this area: inland flooding. These drive insurance cost here.
FEMA National Risk Index, census tract
Superfund site
1.6 mi
Washington Navy Yard (NPL Site). Check groundwater and vapor reports on the EPA site page.
EPA National Priorities List
Leaking fuel tanks
12 within 1,650 ft
Nearest: Unknown, 1000-1100 6th St Sw (500 ft), open. 1 still open. Ask whether groundwater or soil vapor testing was done.
EPA UST Finder, leaking underground storage tank releases
Toxic release facility
3,050 ft
Superior Concrete Materials Inc Dc and 4 more within a mile. Reports chemical releases to air, water or land to EPA each year.
EPA Toxics Release Inventory
High-voltage line
850 ft
138 kV line run by POTOMAC ELECTRIC POWER CO.
HIFLD transmission lines
Radon potential
Moderate
Average indoor levels of 2 to 4 pCi/L. EPA still suggests testing ground-floor and basement units.
EPA and USGS Geologic Radon Potential Map
Nearest public schools
850 ft
AppleTree Early Learning PCS - Waterfront Station (850 ft), Amidon-Bowen ES (1,350 ft), Jefferson MS Academy (2,000 ft). Confirm the assigned school with the district.
U.S. Department of Education, NCES
Major airport
2.0 mi
Reagan National (DCA). Homes this close can sit inside the 65 dB DNL noise contour. Visit at peak hours and check the airport's noise map.
FAA large-hub airports
Conforming loan limit 2026
$1,249,125
District of Columbia. Mortgages up to this amount qualify for Fannie Mae and Freddie Mac pricing. Above it, the loan is a jumbo with stricter terms.
FHFA Conforming Loan Limit Values, one-unit
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More on M Street Southwest
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What's worth checking in person before deciding.
- Test water pressure and temperature at the tap, in the bathroom and kitchen, for at least a minute.
- Ask for the latest maintenance bill from a winter month, not a summer one: that's where the real cost of living there shows up.
- Ask specifically where you'd park: is there paid city parking, who currently holds it, what the permit costs, and how long the waitlist is.
- Schedule a viewing on a weekday too, between 6:00 and 7:30 PM, the window when the building is busiest: neighbors, parking, elevator.
- Knock on a neighboring door and ask two things: what bothers them most often, and what work is planned for the building.
- Look at the stairwell (cleanliness, smell) and the association's notice board: unpaid dues, conflicts, recent decisions.
Neighborhood recommendations are derived from public OpenStreetMap data and may be incomplete. Checking in person is still what matters most.
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