424 Diamond Street, Philadelphia
technical data · neighborhood and transit
Quick answers
- Does 424 Diamond Street have open permits or code violations?
- Philadelphia Department of Licenses and Inspections lists 27 permits, 6 not closed, and 21 violations, 7 open.
- 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 424 Diamond Street at risk for?
- FEMA's National Risk Index rates the area relatively low overall, with elevated heat wave risk.
Permits and code violations
6 permits not closed out. Unfinished permits pass to the next owner. 7 open violations.
- Plumbing permit Oct 2026Issued
Plumbing permit (exterior building drainage) for combo rp-2026-004062
- Plumbing permit Oct 2026Issued
Plumbing permit (water distribution) for combo rp-2026-004062
- Plumbing permit Sep 2026Issued
Plumbing permit (interior) for combo rp-2026-004062
- Residential building permit Sep 2026Issued
New construction of an attached structure to include pilot house and roof deck for use as two-family household living. sheeting and shoring as prescribed in geotech report. separate permits required for sprinkler work (nfpa 13d minimum). energy code compliance in accordance with 2021 iecc. prior to issuance of c/o, submittal of air barrier checklist and envelope testing certificate is required. to be completed by an approved party.
- Zoning permit Feb 2026Issued
For the erection of an attached structure with roof deck and roof deck access structure, size and location as shown in plan.
- Mechanical / fuel gas permit Nov 2025Completed
Mechanical / fuel gas permit for combo rp-2025-007449
- Electrical permit Nov 2025Completed
Electrical permit for combo rp-2025-007449
- Fire suppression permit Nov 2025Completed
For installation of one-inch combined fire/domestic water service line and fire sprinkler system in accordance with approved plans, hydraulic calculations and nfpa 13d.
- Plumbing permit Oct 2025Completed
Plumbing permit (interior) for combo rp-2025-007449
- Plumbing permit Oct 2025Completed
Plumbing permit (water distribution) for combo rp-2025-007449
- Plumbing permit Oct 2025Completed
Plumbing permit (exterior building drainage) for combo rp-2025-007449
- Residential building permit Sep 2025Completed
For the erection of an attached 3-story structure with roof access structure for access to an occupiable roof deck. structure for use as single-family household living. the building is fully sprinklered in accordance with nfpa 13d. all work to be done per approved plans. if field conditions vary contact design engineer prior to the start of any work. separate permiits to be obtained for all other work. **a covered walkway or sidewalk closure shall be required within 9 feet (1/4th of height of building) of the building facade in accordance with section 3306 of the 2018 ibc. separate building and/or streets department permit required prior to the start of any work. ** blower door testing shall be performed in accordance with astm e 779 or astm e 1827 by an approved third-party agency **no excavation greater than 60 inches with this permit**
Philadelphia Department of Licenses and Inspections
Safety and environment
FEMA natural hazard risk
Relatively Low
Highest for this area: heat wave. These drive insurance cost here.
FEMA National Risk Index, census tract
Leaking fuel tanks
3 within 1,650 ft
Nearest: Johns Svc Sta & Auto Parts, 2201 N 6th St (950 ft), no further action. Every release here is closed by the state regulator.
EPA UST Finder, leaking underground storage tank releases
Brownfield site
900 ft
Davis Lamp Building and 32 more within half a mile. Former industrial land in EPA's cleanup and reuse program.
EPA ACRES Brownfields
Toxic release facility
1,950 ft
York Metal Finishing Co and 2 more within a mile. Reports chemical releases to air, water or land to EPA each year.
EPA Toxics Release Inventory
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
300 ft
McKinley William Sch (300 ft), The U School: Innovative Lab (1,350 ft), Welsh John Sch (1,600 ft). Confirm the assigned school with the district.
U.S. Department of Education, NCES
Major airport
9.3 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 Diamond 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.
- 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.
- 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.
- 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.
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