New construction
Why it mattersBought for $19K in 2016, built new under a 2021 permit (tax-abated).
View supporting records →House report
3821 Mount Vernon St
4 bd · 3 stories · 2,025 sqft · RSA5 · built 2022
Investor / LLC · assessed $498K · sold 1×. On the 3800 block of Mount Vernon St.
Property summary
Assessment$498KCity assessed value
Last sale—No sale value available
Est. taxes$1K/yearAnnual city record
Permits7Shown 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
The tax bill is temporary
Today's $1,394/yr reflects a 10-year abatement. It steps up every year and reaches about $6,968/yr in 2035 — $5,574/yr more. Price the full bill, not the current one.
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.
The last transfer was not a sale
The most recent recorded deed moved for nominal consideration. That is where tangled-title problems live — budget a real title search. (Occupants untangling an inherited deed can get help from the city's Tangled Title Fund.)
If you’re the landlord
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
3821 Mt Vernon LLC · corporate / LLC owner
• Owns 2 properties across Philadelphia under this name, assessed at $546K combined
• Holds an active rental license for this address
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
$498K
built 2022
Price / sq ft
$246
block $156 · above block
Appreciation
+4385%
+41%/yr, city 6.5%
In 5 years (~2031)
~$508K
+41%/yr own pace held 5 yrs — extrapolation, not a forecast
Est. tax / yr
$1K
0.28% effective, abated
Gross yield
—
Times sold
1
licensed rental
Value vs. the block, over time — sales, permits & L&I events marked on the line
This houseBlock median & rangeLand buyL&I violationPermit
The paper trail
New constructionBought for $19K in 2016, built new under a 2021 permit (tax-abated).
- 2016 $19KLand buy2 L&I violationsL&I
- 2017 4 L&I violationsL&I
- 2019 2 L&I violationsL&I
- 2020 2 L&I violationsL&I
- 2021 New construction, addition, GFA changePermitNew ConstructionPermitNew ConstructionPermitNew Construction or AdditionsPermitNew ConstructionPermitNew ConstructionPermitNew Construction or AdditionsPermit
Flags: tax-abated — the bill lags real value · active rental license. Informational only — not investment advice or a consumer report (FCRA).
The abatement clock
This house pays about $1,394/yr under a 10-year tax abatement that steps down every year. In 2035 the bill reaches its full ~$6,968/yr — a step up of $5,574/yr, 8 assessment years out. Drag the slider.
now: ($497,800 assessed − $398,214 abated) × 1.3998% ≈ $1,394/yr
2035: $497,800 assessed × 1.3998% ≈ $6,968/yr
The abated slice shrinks ~10% a year (post-2022 program, started 2025) — reassessments move both lines. After expiry an owner-occupant can claim the Homestead Exemption (~$1,400/yr off); an abated home can't hold both.
The house, on paper
The city assessor's field record — the physical spec sheet behind the assessed number.
Bedrooms
4
Stories
3
Interior
2,025 sqft
livable area
Lot
1,092 sqft
Heat
Forced hot air
city code A
Central air
Yes
Exterior condition
Newer construction
city code 1
Newer construction
Interior condition
Newer construction
city code 1
Newer construction
Zoning
RSA5
city zoning code
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Run the numbers
What owning 3821 Mount Vernon 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 (with the abatement toggle above).
Block context
3821 Mount Vernon St sits on the 3800 block of Mount Vernon St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 3819 Mount Vernon St · 3823 Mount Vernon 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 3821 Mount Vernon St,
on paper.
Built 2022. 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)