House report

3817 N Park Ave

Vacant · assessed $31K · sold 2×. On the 3800 block of N Park Ave.

From above — imagery © Esri, Maxar

The story of this houseAI · written from the public record

Reading this house's deeds, permits and assessments…

What to do with this

The record, translated into moves — what a buyer, the owner, and a landlord would each want to check next under Philadelphia's actual rules.

If you’re buying

Zoned RSA6: one household by right

Single-family attached, small lot. Converting to a duplex or apartments needs a use variance the zoning board rarely grants — Pennsylvania courts require a physical hardship of the lot itself, and economics alone do not qualify.

If you own it

3 open violations: the clock matters

L&I appeals must be filed within 30 days — just 6 days if a property is designated UNSAFE or IMMINENTLY DANGEROUS. Left unresolved, the city can do the work itself, bill the owner (routinely $50,000+ on a rowhouse), lien the property, and add court fines of $300+/day.

$2,798 in back taxes on record

Interest and penalties keep compounding until a Revenue payment agreement is in place, and a lien is already filed — an owner-occupant agreement also stops the sheriff-sale track.

Derived from this house's public records and the city's rules as of 2026 (abatement ordinance, Homestead, rental licensing, lead certification, L&I process, excavation protections). Informational only — not legal, tax, or investment advice.

The investment read

How this house has moved and where it's pointed: the city's assessed value (not a listing price) over 12 years, charted against its block; appreciation is that history's pace, and the 5-year figure simply extends it. Yield estimates rent-vs-price from area rents. Ask the analyst below to dig into any number.

Assessed value

$31K

Price / sq ft

—

block $81 ·

Appreciation

-9%

-1%/yr, city 6.5%

In 5 years (~2031)

~$31K

-1%/yr own pace held 5 yrs — extrapolation, not a forecast

Est. tax / yr

$433

1.4% effective

Gross yield

—

Times sold

kept in the family

Value vs. the block, over time — sales, permits & L&I events marked on the line

This houseBlock median & rangeSaleTeardownL&I violationPermit

The paper trailImproved

Bought for $70K in 2008. Owner pulled a demolition permit in 2019.

2008 $70KSold
2016 $5KSold
2019 DemolitionPermitDemolishedTeardown
2022 L&I violationL&I
2023 L&I violationL&I
2024 2 L&I violationsL&I
2025 2 L&I violationsL&I

Flags: 3 open L&I violations · $3K back taxes (2014–2016, $245 of it interest & penalties, lien filed) · long-held within one family. Informational only — not investment advice or a consumer report (FCRA).

Run the numbers

What owning 3817 N Park Ave takes, at your price and your rate. Taxes are this house's actual bill from the city record; rent starts at the area median. Assessed value is not an asking price — set the price slider to the real one.

Purchase price$31K

Down payment20%

Mortgage rate6.875%

Monthly rent$700/mo

Mortgage

—

P&I · 30-yr fixed

All-in monthly

—

+ taxes & insurance

Cash to close

—

down + ~4% costs

Cash flow

—

rent − all costs · /mo

Cap rate

—

NOI ÷ price

Cash-on-cash

—

year-1 return on cash in

Estimates for orientation, not advice. Assumes a 30-year fixed loan, $1,400/yr insurance, 1% of price/yr maintenance; taxes from this parcel's record.

Next door: 3815 N Park Ave · 3819 N Park Ave

Where this comes from

Assessment, spec sheet & owner — OPA Property Assessments, Office of Property Assessment
Sales & deed history — Realty Transfer Tax records, Recorder of Deeds
Permits, violations & inspections — L&I Property History · Atlas
Back taxes & liens — Real Estate Tax Balances, Dept. of Revenue
Zoning appeals — L&I & Zoning Board appeals
Neighborhood income & rents — US Census ACS 5-year estimates
Historical mortgage rates — Freddie Mac Primary Mortgage Market Survey, annual averages

City datasets are fetched live from OpenDataPhilly (phl.carto.com) and cached briefly. Dossiers re-pull automatically — on view once they're a few weeks old, plus a nightly rolling sweep — and citywide benchmarks recompute weekly; the masthead date is when this page's records were last pulled. AI-written passages are generated from these records only and rejected if they state a number the record doesn't hold.

Ask the recordAI · live city records

I research this house against all 580,000+ Philadelphia property records, live — assessments, deeds, permits, violations, taxes, licenses, zoning appeals, schools, crime, and 311. Tap a question below to try me free — your first three typed questions are on the house, and unlimited research comes with membership.

About this data & fine print

Answers are generated by an AI agent querying City of Philadelphia open data at the moment you ask: OPA property assessments, Recorder of Deeds transfer records, L&I permits, violations & licenses, Dept. of Revenue tax balances, Zoning Board appeals, Police incident reports, Philly311 requests, and School District of Philadelphia catchment and school data.

City data is published as-is and can lag, contain errors, or be corrected later; school performance datasets run years behind and are labeled with their school year. AI answers can contain mistakes — verify anything that matters against the official record (property.phila.gov, atlas.phila.gov) before acting on it.

Informational only. Not legal, financial, or investment advice. Not a consumer report under the FCRA — it may not be used to decide anyone's eligibility for housing, tenancy, employment, credit, or insurance.

Official city record ↗ · L&I history ↗ · See the whole block · Download this record (JSON)