House report

3904 Brown St

12 bd · 3 stories · 3,198 sqft · RSA5 · built 2026

Investor / LLC · assessed $48K · sold 1×. On the 3900 block of Brown St.

Street view of 3904 Brown St — From the street — imagery © Google

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 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’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

2436 Marshall St Llc · corporate / LLC owner

• Holds an active rental license for this address

PA corporate registry ↗OpenCorporates ↗City record ↗

The good part · AI research analyst

Ask anything about this house

Everything on this page is one question away from more. The analyst searches all 580,000+ Philadelphia properties, live — every deed, permit, violation, tax bill, license, zoning appeal, school and crime record — and answers with the sources it checked. Not a chatbot reading this page: it runs the city's records for you.

The questions above run free, no card. Typed questions come with membership — free to start, cancel anytime.

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

$48K

built 2026

Price / sq ft

$15

block $122 · below block

Appreciation

+545%

+18%/yr, city 6.5%

In 5 years (~2031)

~$48K

+18%/yr own pace held 5 yrs — extrapolation, not a forecast

Est. tax / yr

$668

1.4% effective

Gross yield

—

Times sold

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 trailNew construction

Bought for $58K in 2024, built new under a 2024 permit.

2007 2 L&I violationsL&I
2024 New construction, addition, GFA changePermitAppeal granted with conditionsZoning$58KLand buy
2025 L&I violationL&INew ConstructionPermitNew Construction or AdditionsPermitNew ConstructionPermitNew ConstructionPermitNew Construction or AdditionsPermitNew Construction or AdditionsPermitNew ConstructionPermit

Flags: active rental license · 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.

Bedrooms

Stories

Interior

3,198 sqft

livable area

Lot

1,422 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

Zoning appeals

granted with conditions 2024

OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.

Run the numbers

What owning 3904 Brown 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.

Purchase price$58K

Down payment20%

Mortgage rate6.875%

Monthly rent$700/mo

When this house last sold (2024) a 30-year mortgage ran about 6.72% — 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.

Next door: 3902 Brown St · 3906 Brown 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

City datasets are fetched live from OpenDataPhilly (phl.carto.com) and cached briefly. AI-written passages are generated from these records only and rejected if they state a number the record doesn't hold.

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 own questions come with membership (free to start).

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)