2026 taxable assessment $615,000 × 1.3998%. Estimate—not a bill or account balance.
OPA also publishes a 2027 assessment of $454,100; it is not the 2026 billed-year value.
House report
1427 Marlborough St
2 bd · 1 ba · 3 stories · 1,329 sqft · RSA5 · built 1920
Investor / LLC · assessed $615K (2026) · 2027 OPA assessment $454K · sold 2×. On the 1400 block of Marlborough St.
Property summary
Assessment$615,0002026 OPA assessment · 2027: $454,100
Last sale$426KRecorded 2020
Est. tax bill$8,609/year2026 taxable assessment × 1.3998%
Tax delinquencyNo 2022 matchNot proof account is current
Permits4Every fetched City permit
Violations0 openNo historical match in fetched records
“Open” reflects records available then historical records keep their source dates estimates are labeled
BlockReport AI · cited public records
Ask the questions this record raises.
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Question or correct this record
BlockReport can explain a discrepancy, but it cannot rewrite an official City record. Use the agency that owns the underlying fact:
Property tax
The estimate, live balance, and back-tax record are different.
BlockReport can calculate the annual tax from the City’s taxable assessment. Payments, credits, interest, and a current amount due live separately in Philadelphia Tax Center.
A Tax Center balance is net of bills, payments, credits, interest, and adjustments. A credit—or an amount due—is not automatically “back taxes.”
OPA 1810706002026 taxable assessment equals the full assessed value.
Historical delinquency sources No current conclusion
This parcel did not match the June 2022 delinquency snapshot. That absence does not confirm the account is current today.
For a purchase, refinance, or closing, request the City’s official Property Payoff statement in Tax Center under “More options.”
What stands out
From the public recordRenovated & sold on
Why it mattersBought for $300K in 2017, major alteration permit in 2017, sold for $426K in 2020 (+42%).
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.
Assessment/permit mismatch
The assessment jumped 34% in 2025, but no matching permit appears in the property timeline.
Evidence: assessment moved from $459,000 to $615,000 · no permit shown in 2024-2026
Limit: Not proof of unpermitted work; reassessment, corrected data, or a permit under another parcel can also explain it.
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 buying
Built 1920: 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.
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
Construction next door (1425 Marlborough St, 2025)
Excavation deeper than 5 feet, or within 10 feet of an adjacent structure, legally requires the developer to survey neighboring homes first and give owners 10 days' written notice. Insist on the pre-construction survey — it is your evidence if cracks appear.
If you’re the landlord
If it is rented, verify the Rental License
The fetched license records do not show an active Rental License. Ownership type or a tax mailing address does not prove that tenants occupy the property; if it is rented, verify the current license and legal occupancy in eCLIPSE.
Derived from the fetched property records and linked City guidance as of 2026. Assessment treatment is not a substitute for an exemption approval, live balance, title report, license, occupancy certificate, or inspection. Informational only — not legal, tax, or investment advice.
Who's behind it
Fsv Real Estate LLC · corporate / LLC owner
• Owns 3 properties across Philadelphia under this name, assessed at $1.6M combined
• Tax bills mail to 207 Burk Ave, Ridley Park PA, 19078 — outside Philadelphia
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
$615,000
2026 billed-year assessment · 2027: $454,100 · built 1920
Price / sq ft
$342
block $296 · above block
Appreciation
+220%
+12%/yr, city 6.5%
In 5 years (~2031)
~$457K
+12%/yr own pace held 5 yrs — extrapolation, not a forecast
Est. tax bill / yr
$8,609
1.9% effective
Jun 2022 tax snapshot
No match
not proof the account is current
Gross yield
5.1%
≈$2K/mo rent
Times sold
2
Value vs. the block, over time — sales, permits & L&I events marked on the line
This houseBlock median & rangeSalePermit
Highlight
The paper trail
Renovated & sold onBought for $300K in 2017, major alteration permit in 2017, sold for $426K in 2020 (+42%).
- 2017 $300KSoldMajor alterationPermitZoningPermitPlumbingPermit
- 2020 $426KSold
- 2023 Change of UsePermit
City record timeline
Every dated deed, permit, inspection, license, violation, certification, and appeal—together.
The timeline combines the report’s transfer history with every successfully fetched L&I and zoning row. A date or status is the City’s filed record, not a statement that the condition remains current; use the official file for live detail.
- Recorded owner
- Fsv Real Estate LLC
- L&I district
- CENTRAL EAST
- OPA account
- 181070600
What this record suggests
The City file documents 4 permits touching plumbing, roof work. 4 carries a completed, issued, or approved status; that documents the filing, not the present quality of the work.
- LicenseLimited Lodging Operator
License 0971078 · Inactive
christian rupert · Expires 2026-02-06 · Inactive 2026-04-06
- LicenseRental
License 0960637 · Inactive
FSV Real Estate · Expires 2025-09-06 · Inactive 2025-11-05
- PermitChange of Use
Permit ZP-2023-003826 · Issued
Limited Lodging
- Recorded transfer$426K transfer
2020
- PermitPlumbing
Permit 810436 · COMPLETED
REPLACE CURB TRAP AND FAI TO HOUSE-PA1#20172341791-"SELF-CERTIFICATION'S ARE NO LONGER PERMITTED" - "ALL EXCAVATIONS AND PLUMBING TRENCHES IN EXCESS OF 5 FEET IN DEPTH MUST HAVE APPROVED SHORING IN PLACE AT THE TIME OF INSPECTION"
- PermitMajor alteration
Permit 788827 · COMPLETED
FOR THE CONSTRUCTION OF TWO (2) TIER ROOF DECKS (NO ROOF DECK ACCESS STRUCTURE); ONE (1) ROOF DECK AT THE THIRD FLOOR REAR, ONE (1) ROOF DECK ACCESSED FROM THE THIRD FLOOR REAR VIA A STAIRCASE; IN AN EXISTING SINGLE FAMILY DWELLING AS PER ENGINEER'S PLANS,
- PermitZoning
Permit 788824 · COMPLETED
FOR THE ERECTION OF TWO (2) TIER ROOF DECKS (NO ROOF DECK ACCESS STRUCTURE); ONE (1) ROOF DECK AT THE THIRD FLOOR REAR, ONE (1) ROOF DECK ACCESSED FROM THE THIRD FLOOR REAR VIA A STAIRCASE; IN AN EXISTING SINGLE FAMILY HOUSEHOLD LIVING, SIZE AND LOCATION AS SHOWN IN THE APPLICATION/PLAN,
- Recorded transfer$300K transfer
2017
Unavailable when this report assembled: certifications. Unavailable does not mean no record.
Free record guide
How Philadelphia’s property system works
These explainers are free because the record only helps if you know what it can—and cannot—prove. Use the linked City guidance for the controlling rule.
Permits and inspections 4 on this property
This property’s file includes BP_ALTER, ZP_ZONING, PP_PLUMBNG, Zoning permit records. A permit documents authorized scope and a City process; it is not by itself proof that every described improvement was completed, remains in place, or meets today’s condition expectations.
L&I inspections are scheduled at defined stages; final inspection and required certifications are separate steps in closing out applicable work.
How construction and repair permits work ↗See City inspection stages by permit type ↗Assessments and taxes
The OPA assessment is the City’s value on the tax roll—not an asking price, appraisal, or live account balance. The taxable assessment can differ from the full assessment because the City roll records exemptions or other treatment; the report keeps those fields separate.
Your annual estimate uses the taxable assessment. Payments, credits, interest, and the amount due are maintained separately in Tax Center.
How the Office of Property Assessment works ↗Philadelphia property-tax guidance ↗Violations, cases, and status
L&I enforcement records can include warnings, notices, orders, inspections, and later resolution activity. A closed visit is still a historical record; it is not a missing event.
How L&I code enforcement works ↗City violation and order types ↗Informational only — not investment advice or a consumer report (FCRA).
The property, on paper
The city assessor's field record — the physical spec sheet behind the assessed number.
Bedrooms
2
Bathrooms
1
Stories
3
Interior
1,329 sqft
livable area
Lot
714 sqft
Basement
Full, finished
city code A
Heat
Forced hot air
city code A
Central air
No
Exterior condition
Average
city code 4
Above averageBelow average
Interior condition
New / rehabbed
city code 2
New / rehabbed
Quality grade
C+
assessor's grade
ABCDE
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 1427 Marlborough 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 the area median. Assessed value is not an asking price — set the price slider to the real one.
When this house last sold (2020) a 30-year mortgage ran about 3.1% — 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 use this parcel's taxable assessment, not a live Tax Center balance.
Block context
1427 Marlborough St sits on the 1400 block of Marlborough St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 1425 Marlborough St · 1429 Marlborough 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
- Imagery — Street photo © Google · Aerial © Esri, Maxar
Methodology & freshness
This report was assembled Jul 10, 2026, 4:46 AM ET. Available City datasets are queried from OpenDataPhilly (phl.carto.com) and the cited City ArcGIS feeds; record queries paginate rather than silently taking a first page. For this property: Permits: queried · Violations: queried · Investigations: queried · Appeals: queried · Licenses: queried · Building certifications: unavailable. “Unavailable” means the source query failed or was not supplied, not “no record.” Reports re-pull on view after seven days and on an overnight rolling schedule; citywide benchmarks recompute weekly. Source dates still govern: the parcel-level tax-delinquency snapshot is June 2022 and the separate detailed tax ledger ends in 2016, so neither establishes today’s balance. The live balance and date-effective payoff must be verified in Tax Center. AI-written passages are grounded in the assembled record and rejected if they state a number the record does not hold.
Official city record ↗ · L&I history ↗ · See the whole block · Download this record (JSON)