New construction
Why it mattersbuilt new under a 2020 permit.
View supporting records →House report
310 Market St
5,070 sqft · CMX3 · built 1900
Investor / LLC · assessed $1.2M · sold 1×. On the 300 block of Market St.
Property summary
Assessment$1.2MCity assessed value
Last sale$700KRecorded 2018
Est. taxes$16K/yearAnnual city record
Permits8Shown in this report
ViolationsNone openNo open L&I cases
What stands out
From the public recordMarked sealed, but licensed as a rental
Why it mattersThe assessor's condition code says sealed, while L&I shows an active rental license here. Both can't be current.
View supporting records →"Built 1900" is usually a placeholder
Why it mattersPhiladelphia records use 1900 as a stand-in when the real construction year was never documented. Treat the age as unknown, not as 120+ years.
View supporting records →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
Built 1900: 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’re the landlord
Lead certificate is not optional
Built 1900: every rental unit needs a lead-safe or lead-free certificate on file with the City. Without one: fines up to $2,000/day per unit, tenants may withhold rent, courts can order rent refunded — and no eviction will stand.
Licensed rental — keep it that way
Renewal requires city tax clearance and zero open L&I violations on the property. A lapsed license suspends the right to collect rent or evict.
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.
Who's behind it
Jin & L INC · corporate / LLC owner
• Owns 2 properties across Philadelphia under this name, assessed at $2.3M combined
• Holds an active rental license for this address
• The last transfer was a nominal/family deed, not an open-market sale
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
$1.2M
built 1900
Price / sq ft
$228
block $228 · in line w/ block
Appreciation
+185%
+10%/yr, city 6.5%
In 5 years (~2031)
~$1.2M
+10%/yr own pace held 5 yrs — extrapolation, not a forecast
Est. tax / yr
$16K
1.4% effective
Gross yield
—
Times sold
1
kept in the family
Value vs. the block, over time — sales, permits & L&I events marked on the line
This houseBlock median & rangeL&I violationZoningPermit
The paper trail
New constructionbuilt new under a 2020 permit.
- 2018 Appeal filedZoning
- 2019 2 L&I violationsL&IAppeal grantedZoning
- 2020 New ConstructionPermitNew ConstructionPermitAddition and/or AlterationPermitAlterationsPermitNew ConstructionPermit
- 2021 Addition and/or AlterationsPermitAddition and/or AlterationsPermit
- 2022 Change of UsePermit
- 2023 5 L&I violationsL&I
Flags: active rental license · 2 zoning/board appeals on record · 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.
Interior
5,070 sqft
livable area
Lot
1,186 sqft
Exterior condition
Sealed / compromised
city code 7
Sealed / compromised
Interior condition
Sealed / compromised
city code 7
Sealed / compromised
Quality grade
B
assessor's grade
ABCDE
Zoning
CMX3
city zoning code
Zoning appeals
2
granted 2019
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Where the record looks off
Places where the city's own paperwork disagrees with itself. These are flags on the data — not problems with the property.
Marked sealed, but licensed as a rental
The assessor's condition code says sealed, while L&I shows an active rental license here. Both can't be current.
"Built 1900" is usually a placeholder
Philadelphia records use 1900 as a stand-in when the real construction year was never documented. Treat the age as unknown, not as 120+ years.
Run the numbers
What owning 310 Market 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 (2018) a 30-year mortgage ran about 4.54% — 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
310 Market St sits on the 300 block of Market St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 308 Market St · 312 Market 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 310 Market St,
on paper.
Built 1900. 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)