House report

512 S 4th St

3 bd · 3 ba · 1 story · 2,412 sqft · RM1 · built 1980

Absentee individual · assessed $660K · 2 licensed units · sold 1×. On the 500 block of S 4th St.

Property summary

Assessment$660KCity assessed value Last sale$600KRecorded 2022 Est. annual tax$9K/yearAssessment × 1.3998% Tax delinquency—Snapshot unavailable Permits6Dated events in report ViolationsNone openNone open when assembled

Report assembled Jul 9, 2026 “Open” reflects records available then historical records keep their source dates estimates are labeled

BlockReport AI · cited public records

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Street view of 512 S 4th St — From the street — imagery © Google

From above — imagery © Esri, Maxar

What stands out

From the public record

Finding

Improved

Why it matters

Bought for $600K in 2022. Owner pulled a certificate of occupancy (co) (may inclu… permit in 2026.

View supporting records →

Records to verify together

Rule-based groupings across this property's dated public records. Each flag shows the records that belong in the same verification step and where the inference stops.

Dated record flagPost-purchase work pattern

A recorded purchase followed by 6 permit events matches the early part of a renovate-and-resell sequence.

Evidence: purchase recorded in 2022 · permit activity in 2022, 2023, 2026

Limit: This does not show that the property is listed or that a sale is planned.

Transparent record rules, not a score or forecast. Each flag is a prompt to verify the cited records, not a prediction or allegation.

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 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.

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

$660K

built 1980

Price / sq ft

$274

block $236 · above block

Appreciation

+16%

+1%/yr, city 6.5%

In 5 years (~2031)

~$660K

+1%/yr own pace held 5 yrs — extrapolation, not a forecast

Est. tax / yr

$9K

1.4% effective

Jun 2022 tax snapshot

—

Gross yield

4.5%

≈$2K/mo rent

Times sold

licensed rental

Value vs. the block, over time — sales, permits & L&I events marked on the line

This houseBlock median & rangeSalePermit

The paper trail

Improved

Bought for $600K in 2022. Owner pulled a certificate of occupancy (co) (may inclu… permit in 2026.

2022 $600KSoldChange of UsePermit
2023 Addition and/or AlterationPermitAddition and/or AlterationsPermitAlterationsPermitAddition and/or AlterationPermit
2026 Certificate of Occupancy (CO) (may inclu…Permit

Flags: active rental license. 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

Bathrooms

Stories

Interior

2,412 sqft

livable area

Lot

1,772 sqft

Basement

Full, finished

city code 1

Heat

Forced hot air

city code A

Central air

Yes

Garage

1 space

Exterior condition

Average

city code 4

Above averageBelow average

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 512 S 4th St takes, at your price and your rate. Taxes start with an annual estimate from the City’s taxable assessment, not a current bill or balance; rent starts at 2 licensed units × ~85% of the area's median unit rent — the whole building's income, not one unit's. Assessed value is not an asking price — set the price slider to the real one.

Purchase price$600K

Down payment20%

Mortgage rate6.875%

Monthly rent · 2 units$4K/mo

When this house last sold (2022) a 30-year mortgage ran about 5.34% — 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

512 S 4th St sits on the 500 block of S 4th St. Open the block report to compare its parcels, ownership and public-record history.

See the whole block →

Next door: 510 S 4th St · 514 S 4th 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
Tax delinquency snapshot · June 2022 — Real Estate Tax Delinquencies, Dept. of Revenue
Historical tax ledger & liens · through 2016 — Real Estate Tax Balances, Dept. of Revenue
Current property-tax balance — Verify with Philadelphia 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

Methodology & freshness

Available City datasets are queried from OpenDataPhilly (phl.carto.com), then reports are cached and refreshed on a rolling schedule. Source dates vary: the parcel-level tax-delinquency snapshot is June 2022 and the separate detailed tax ledger ends in 2016, so neither establishes today’s balance. Other dossiers re-pull on view once stale, 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.

BlockReport AICited sources

Ask about this property across the connected public record. Curated questions are free; ask 3 custom questions per browser. Analyst includes up to 150 custom questions per day.

About this data & fine print

Answers are generated by an AI agent querying available City of Philadelphia open data at the moment you ask: OPA property assessments, Recorder of Deeds transfer records, L&I permits, violations & licenses, dated Dept. of Revenue tax records, Zoning Board appeals, Police incident reports, Philly311 requests, and School District of Philadelphia catchment and school data.

For an explicit web search or a current listing/news question, the agent may also search the public web through OpenRouter and must link every web-derived claim. Public listing pages can be stale and are not direct or comprehensive MLS access.

Property-level tax data is historical: the delinquency snapshot is dated June 2022 and the separate detailed ledger ends in 2016. Neither shows what is owed today; verify a current balance with Philadelphia Revenue.

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)