454 N Street Southwest, Washington
Estimated number, map position is approximatetechnical data · neighborhood and transit
Quick answers
- Does 454 N Street Southwest have open permits or code violations?
- DC Department of Buildings lists 31 permits, 21 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 454 N 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
21 permits not closed out. Unfinished permits pass to the next owner.
- Supplemental May 2026Permit issued
- Construction May 2026Permit issued
Historic & cfa comprehensive structural concrete repairs to parking structure.
- Supplemental Apr 2026Permit issued
- Supplemental Mar 2026Permit issued
- Construction Jan 2026Permit issued
Commission of fine arts jurisdiction area remove all existing roof materialscoverings, flashings, insulation, filter fabric, ballast, pavers, cupola stones, planter fill, and railingsdown to bare concrete. salvage and store planter fill, pavers, cupola stones, and insulation for reuse. protect the existing perimeter metal slag stop. prepare the concrete deck and other substrates per manufacturer and project specifications. if pitch residue is present, install irex 40 separator. install pressure-treated wood blocking to match new insulation height. provide and install a complete two-ply, thermos-fused sbs modified bitumen roofing system per specifications, including new flashings, scupper liners, and related components for a weatherproof system. add insulation to achieve r-30 and install new filter fabric. replace existing deck drains as needed. install new tudor-finished pavers at roof edges, and reinstall salvaged pavers and cupola stones at terraces and walkways.
- Supplemental Oct 2025Permit issued
- Supplemental Sep 2025Completed
Electrical trade permit
- Supplemental Sep 2025Permit issued
- Supplemental Apr 2025Permit issued
- Supplemental Apr 2025Permit issued
- Construction Feb 2025Permit issued
Commission of fine arts jurisdiction area replacement of fire alarm panel, nac panels and initiating devices, for the building. no changes to notification devices or wiring to be done.
- Supplemental Feb 2025Permit issued
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
1.7 mi
Washington Navy Yard (NPL Site). Check groundwater and vapor reports on the EPA site page.
EPA National Priorities List
Leaking fuel tanks
9 within 1,650 ft
Nearest: Unknown, 1000-1100 6th St Sw (1,000 ft), open. 1 still open. Ask whether groundwater or soil vapor testing was done.
EPA UST Finder, leaking underground storage tank releases
Brownfield site
2,550 ft
1714 Second Street Property. Former industrial land in EPA's cleanup and reuse program.
EPA ACRES Brownfields
Toxic release facility
2,850 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
Historic listing nearby
100 ft
Duncanson-Cranch House and 4 more listings close by. Exterior changes can need preservation review; listed buildings can qualify for rehabilitation tax credits.
National Park Service, National Register
High-voltage line
1,150 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
1,500 ft
AppleTree Early Learning PCS - Waterfront Station (1,500 ft), Amidon-Bowen ES (1,950 ft), Jefferson MS Academy (2,400 ft). Confirm the assigned school with the district.
U.S. Department of Education, NCES
Major airport
1.9 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 N 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 specifically where you'd park: is there paid city parking, who currently holds it, what the permit costs, and how long the waitlist is.
- Look at the stairwell (cleanliness, smell) and the association's notice board: unpaid dues, conflicts, recent decisions.
- Knock on a neighboring door and ask two things: what bothers them most often, and what work is planned for the building.
- Schedule a viewing on a weekday too, between 6:00 and 7:30 PM, the window when the building is busiest: neighbors, parking, elevator.
- 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.
Neighborhood recommendations are derived from public OpenStreetMap data and may be incomplete. Checking in person is still what matters most.
The year built, height regime, structure, and elevator for this address are being indexed right now, city by city. Save the page and check back: it fills in over time. If you live here, you can fill it in yourself in a minute by leaving a review.