3405 Walnut Street, Philadelphia
technical data · neighborhood and transit
Quick answers
- Does 3405 Walnut Street have open permits or code violations?
- Philadelphia Department of Licenses and Inspections lists 29 permits, 2 not closed, and 3 violations.
- What is the 2026 conforming loan limit in Philadelphia County?
- $832,750 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 3405 Walnut Street at risk for?
- FEMA's National Risk Index rates the area very high overall, with elevated tornado and inland flooding risk.
Permits and code violations
2 permits not closed out. Unfinished permits pass to the next owner. No open violations.
- Electrical permit May 2026Completed
Electrical work only: install new branch circuits, devices, lighting, and associated wiring for elevator modernization as per 2017 nec. alterations to existing fire alarm system as per 2016 nfpa 72.
- Mechanical / fuel gas permit Apr 2026Completed
For the installation of an appliance to be installed in accordance with the manufacturer’s specifications. for use as previously approved. all work to be done per approved plans. if field conditions vary contact design engineer prior to the start of any work. separate permits to be obtained for all other work.
- Plumbing permit Jan 2019Completed
Install new 2" distribution pipe from curb and into the bldg basement as per 2004 ppc
- Operations permit Oct 2018Completed
10/18/18 erect tent: 30x15 fair or 30x50 rain
- Operations permit Aug 2016Completed
8/25/16 erect assembly tent 40x90, 20x20
- Operations permit Jun 2016Completed
6/13/16 erect assembly tent 40x60
- Electrical permit Oct 2015Completed
Furnish and install new 1 booster panel and 33 horn/strobes as per nfpa72 (west district)
- Electrical permit Sep 2015Completed
New lighting fixtures, receptacles and panels as shown on plans as per 2008 nec (west district)
- Electrical permit Aug 2015Completed
Furnish and install (17) new lights (10) receptacles (1) dishwater (1)refrigerator as per 2008 nec (west district)
- Operations permit Sep 2014Completed
09/03/2014 erect assembly tent (20'x50') college green/peaelman school of medicine event
- Alteration permit May 2014Closed
Sidewalk shelter platform
- Operations permit May 2014Completed
05/13/2014 erect assembly tents (1)40'x90') (2)20'x60') for university of pennsylvania
Philadelphia Department of Licenses and Inspections
Safety and environment
FEMA natural hazard risk
Very High
Highest for this area: tornado, inland flooding, heat wave, cold wave, winter weather. These drive insurance cost here.
FEMA National Risk Index, census tract
Leaking fuel tanks
7 within 1,650 ft
Nearest: Gen Svcs Bldg, 3330 Market St (1,350 ft), open. 1 still open. Ask whether groundwater or soil vapor testing was done.
EPA UST Finder, leaking underground storage tank releases
Brownfield site
1,700 ft
Schuylkill River Trail and 2 more within half a mile. Former industrial land in EPA's cleanup and reuse program.
EPA ACRES Brownfields
Toxic release facility
1,600 ft
Ge Co Re Entry Sys Department and 6 more within a mile. Reports chemical releases to air, water or land to EPA each year.
EPA Toxics Release Inventory
Historic listing nearby
250 ft
Sansom Row and 1 more listings close by. Exterior changes can need preservation review; listed buildings can qualify for rehabilitation tax credits.
National Park Service, National Register
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
1,850 ft
Powel Samuel Sch (1,850 ft), Science Leadership Academy MS (1,850 ft), Robeson HS for Human Services (3,900 ft). Confirm the assigned school with the district.
U.S. Department of Education, NCES
Major airport
6.1 mi
Philadelphia International (PHL). Aircraft may be audible under approach paths.
FAA large-hub airports
Conforming loan limit 2026
$832,750
Philadelphia County. 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 Walnut Street
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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.
- This is a dormitory or university space. Ask who manages the building, what the access hours are, and how noisy it gets during the semester versus break.
- 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.
- 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.
Neighborhood recommendations are derived from public OpenStreetMap data and may be incomplete. Checking in person is still what matters most.