603 4th Street Southwest, Washington
technical data · neighborhood and transit
Quick answers
- Does 603 4th Street Southwest have open permits or code violations?
- DC Department of Buildings lists 7 permits, 6 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 603 4th Street Southwest at risk for?
- FEMA's National Risk Index rates the area relatively high overall, with elevated earthquake and hurricane risk.
Permits and code violations
6 permits not closed out. Unfinished permits pass to the next owner.
- Construction Aug 2026Permit issued
Remove existing sunroom and install a new sunroom
- Supplemental Aug 2026Permit issued
- Supplemental Aug 2026Completed
- Construction Apr 2026Permit issued
Brick tuckpointing and repointing. replace stair rail
- Construction Apr 2026Permit issued
Replace existing wood privacy fence approximately 19 feet
- Construction Mar 2026Permit issued
Remove and replace 1 door, renewal by andersen, no structural changes, no widening of existing openings
- Post card Jun 2022Expired
DC Department of Buildings
Safety and environment
FEMA natural hazard risk
Relatively High
Highest for this area: earthquake, hurricane, tornado, coastal flooding, inland flooding, strong wind, hail, heat wave. 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
12 within 1,650 ft
Nearest: Chevron Usa Inc, 501 4th St Sw (200 ft), no further action. Every release here is closed by the state regulator.
EPA UST Finder, leaking underground storage tank releases
Toxic release facility
4,200 ft
Us Department Of The Treasury Bureau Of Engraving Printing and 3 more within a mile. Reports chemical releases to air, water or land to EPA each year.
EPA Toxics Release Inventory
Historic listing nearby
400 ft
Social Security Administration Building. Exterior changes can need preservation review; listed buildings can qualify for rehabilitation tax credits.
National Park Service, National Register
High-voltage line
250 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
800 ft
Amidon-Bowen ES (800 ft), Richard Wright PCS for Journalism and Media Arts (850 ft), Washington Global PCS (900 ft). Confirm the assigned school with the district.
U.S. Department of Education, NCES
Major airport
2.3 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 4th Street Southwest
All addressesViewing recommendations
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.
- This is a house, not an apartment. Check the lot boundaries, car access, and how water drains from the yard after rain, including whether the neighboring lot sits higher and could send water toward the property.
- Check exactly where you'd park: a spot in the yard or garage, or street parking, and how crowded the street gets in the evening.
- Check the roof, gutters, and downspouts for signs of leaks or recent repairs, especially if it has rained recently.
- Ask what heating system is in place (own boiler, wood, gas) and request the last winter month's bills.
- Check the sewer connection (public network or septic tank) and the water source (public network or well), including pressure and water quality.
- Knock on a neighboring gate and ask about noise, pets, flooding, or other issues common in the area.
Neighborhood recommendations are derived from public OpenStreetMap data and may be incomplete. Checking in person is still what matters most.