New construction
Why it mattersbuilt new under a 2025 permit, sold for $3K in 2020.
View supporting records →House report
1840 N Marston St
Vacant · assessed $23K · sold 1×. On the 1800 block of N Marston St.
Property summary
Assessment$23KCity assessed value
Last sale$3KRecorded 2020
Est. taxes$325/yearAnnual city record
Permits1Shown in this report
ViolationsNone openNo open 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
Zoned RSA5: one household by right
Single-family rowhouse (the classic Philly row). 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
$109 in back taxes on record
Interest and penalties keep compounding until a Revenue payment agreement is in place — 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 record to dig into any number.
Assessed value
$23K
Price / sq ft
—
block $220 ·
Appreciation
+759%
+22%/yr, city 6.5%
In 5 years (~2031)
~$23K
+22%/yr own pace held 5 yrs — extrapolation, not a forecast
Est. tax / yr
$325
1.4% effective
Gross yield
—
Times sold
1
Value vs. the block, over time — sales, permits & L&I events marked on the line
This houseBlock median & rangeSaleL&I violationZoning
The paper trail
New constructionbuilt new under a 2025 permit, sold for $3K in 2020.
- 2020 $3KSold
- 2021 L&I violationL&I
- 2023 Appeal dismissedZoning
- 2024 4 L&I violationsL&I
- 2025 New construction, addition, GFA changePermit2 L&I violationsL&I
- 2026 2 L&I violationsL&I
Flags: $109 back taxes · 1 zoning/board appeal on record. 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.
Lot
581 sqft
Zoning
RSA5
city zoning code
Zoning appeals
1
dismissed 2023
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Run the numbers
What owning 1840 N Marston 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.
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
1840 N Marston St sits on the 1800 block of N Marston St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 1838 N Marston St · 1842 N Marston 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 1840 N Marston St,
on paper.
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)