Improved
Why it mattersOwner pulled a roof covering replacement permit in 2023.
View supporting records →House report
4145 N 9th St
3 bd · 1 ba · 2 stories · 1,044 sqft · RM1 · built 1925
Absentee individual · assessed $116K. On the 4100 block of N 9th St.
Property summary
Assessment$116KCity assessed value
Last sale$15KRecorded 2015
Est. taxes$2K/yearAnnual city record
Permits1Shown in this report
Violations7Open L&I cases
What stands out
From the public recordWhat 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
Built 1925: lead rules apply
Federal law requires a lead-paint disclosure at sale for any pre-1978 home. If it will be rented, Philadelphia also requires a lead-safe or lead-free certificate before a rental license can issue.
If you own it
7 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.
$1,138 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.
If you’re the landlord
No active rental license on file
If this property is rented, Philadelphia requires a Rental License (via eCLIPSE) — without it a landlord cannot legally collect rent or evict, and tenants can withhold. Licensing needs tax clearance and no open violations.
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 record to dig into any number.
Assessed value
$116K
built 1925
Price / sq ft
$111
block $112 · in line w/ block
Appreciation
+119%
+7%/yr, city 6.5%
In 5 years (~2031)
~$117K
+7%/yr own pace held 5 yrs — extrapolation, not a forecast
Est. tax / yr
$2K
1.4% effective
Gross yield
-6872852.2%
≈$-667M/mo rent
Times sold
0
kept in the family
Value vs. the block, over time — sales, permits & L&I events marked on the line
This houseBlock median & rangeL&I violationInspection
The paper trail
ImprovedOwner pulled a roof covering replacement permit in 2023.
- 2017 8 L&I violations incl UNSAFE STRUCTUREL&I
- 2020 4 L&I violationsL&IL&I: 2 failed, 2 passedL&I visit
- 2021 9 L&I violations incl UNSAFE STRUCTUREL&IInspection failed ×4L&I visit
- 2022 L&I: 3 failed, 1 passedL&I visit
- 2023 Roof Covering ReplacementPermit5 L&I violationsL&IL&I: 6 failed, 1 passedL&I visit
Flags: 7 open L&I violations · $1K back taxes (2016, $21 of it interest & penalties, lien filed) · long-held within one family. Informational only — not investment advice or a consumer report (FCRA).
The house, on paper
The city assessor's field record — the physical spec sheet behind the assessed number.
Bedrooms
3
Bathrooms
1
Stories
2
Interior
1,044 sqft
livable area
Lot
806 sqft
Exterior condition
Vacant
city code 6
Vacant
Interior condition
Average
city code 4
Above averageBelow average
Quality grade
C
assessor's grade
ABCDE
Zoning
RM1
city zoning code
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Run the numbers
What owning 4145 N 9th St 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.
When this house last sold (2015) a 30-year mortgage ran about 3.85% — Freddie Mac's average that year.
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.
Block context
4145 N 9th St sits on the 4100 block of N 9th St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 4143 N 9th St · 4147 N 9th St
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
- Imagery — Street photo © Google · Aerial © Esri, Maxar
Methodology & freshness
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. AI-written passages are generated from these records only and rejected if they state a number the record doesn't hold.
First time here?
This is 4145 N 9th St,
on paper.
Built 1925. Every deed, permit, L&I visit, tax bill and sale for this house — plus its whole block.
No signup, no teaser
The whole record is free.
Permits, violations, taxes, deeds, ownership, and block context are all here. The public record is free to read; membership is for deeper research.
Three taps, you're oriented
What to catch on the way down.
On the way down: the story of the house, its paper trail drawn on the value chart, and run-the-numbers, a calculator seeded with this house's actual tax bill.
Official city record ↗ · L&I history ↗ · See the whole block · Download this record (JSON)