2026 taxable assessment $319,100 × 1.3998%. Estimate—not a bill or account balance.
OPA also publishes a 2027 assessment of $276,800; it is not the 2026 billed-year value.
Multi-family report
1710 Diamond St
3 stories · 2,364 sqft · RM1 · built 1915
Investor / LLC · assessed $319K (2026) · 2027 OPA assessment $277K · sold 1×. On the 1700 block of Diamond St.
Property summary
Assessment$319,1002026 OPA assessment · 2027: $276,800
Last sale$115KRecorded 2004
Est. tax bill$4,467/year2026 taxable assessment × 1.3998%
Tax delinquency$6KCity snapshot · Jun 2022
Permits0Every fetched City permit
Violations3 open21 historical across 2 cases
“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.
These curated questions are free. Choose one to open its cited answer.
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 3211763002026 taxable assessment equals the full assessed value.
Historical delinquency sources Record found
$5,881.24 was recorded for this parcel in Philadelphia's June 2022 delinquency snapshot for 2021. That amount may have been paid, reduced, or increased since; it is not a current payoff figure.
$4,397.89 principal$230.89 interest$263.87 penalty$988.59 other charges
The snapshot’s 2022 context used $273,200 total assessment, $273,200 taxable, and $0 exempt/abated. Those historical fields can differ from today’s OPA exemption status.
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 recordHistory
Why it matterssold $115K (2004); 18 L&I violations (2016); Inspection failed ×2 (2016); Inspection failed (2017); L&I: 1 failed, 1 passed (2018); 3 L&I violations (2026); Inspection failed ×2 (2026).
View supporting records →City Property History
Fetched L&I and zoning records
Every row successfully fetched for this report is counted below. Dataset availability and matching can differ from the City's interactive file; use the official link for current detail.
- Recorded owner
- M M Nicolais Group INC
- Tax mailing address
- 1508 N 17TH ST, PHILADELPHIA PA, 19121
- L&I district
- NORTH
- Building ID (BIN)
- —
- OPA account
- 321176300
Permits0No match
Violation cases221 violation records · 1 open
Investigations86 failed · 1 passed · 1 closed
Building certifications0No match
Business licenses10 active
Appeals0No match
PermitsPermit number, issued date, work and City status0
No permits matched this parcel in the fetched City dataset.
Violation cases21 individual violation records; resolved history remains visible2
Case 550660CLOSED
STANDARD · Opened Aug 17, 2016
- FIRE EXTING-INSTALL MAX 75FTViolation 4586972Aug 16, 2016 COMPLIED
- FA-REPAIR SYSTEMViolation 4586971Aug 16, 2016 COMPLIED
- FIRE-DOOR STAIR 1HR RATINGViolation 4586970Aug 16, 2016 COMPLIED
- INT DOOR SELF-CLOSEViolation 4586969Aug 16, 2016 COMPLIED
- FIRE-ELECT OPEN JUNCTION BOXViolation 4586968Aug 16, 2016 COMPLIED
- INT COMBUSTIBLE WASTE ACCUMULViolation 4586965Aug 16, 2016 COMPLIED
- MULTI FAMILY (R2)Violation 4586964Aug 16, 2016 COMPLIED
- HEAT APPL DEFECTIVEViolation 4586966Aug 16, 2016 COMPLIED
- ELECTRICAL -HAZARDViolation 4586981Aug 16, 2016 COMPLIED
- MECH - MECHANICAL EQUIPMENTViolation 4586980Aug 16, 2016 COMPLIED
- HANDRAILS AND GUARDSViolation 4586979Aug 16, 2016 COMPLIED
- INTERIOR SURFACESViolation 4586977Aug 16, 2016 COMPLIED
- INTERIOR SURFACES STAIRS, ETCViolation 4586978Aug 16, 2016 COMPLIED
- FIRE-ELECT EXT CORDS PROHIBViolation 4586967Aug 16, 2016 COMPLIED
- ANNUAL CERT FIRE ALARMViolation 4586976Aug 16, 2016 COMPLIED
- FIRE-PULL STATION SIGNSViolation 4586975Aug 16, 2016 COMPLIED
- FIRE EXTING-NEEDS INSP/TAGViolation 4586974Aug 16, 2016 COMPLIED
- FIRE EXTING-INSTALL R2Violation 4586973Aug 16, 2016 COMPLIED
Case CF-2026-042806IN VIOLATION
NOTICE OF VIOLATION · Opened Apr 28, 2026
- RENTAL LICENSE MULTI FAMILY (R2)Violation VI-2026-026352Apr 29, 2026 OPEN
- PERIODIC TESTING Violation VI-2026-026349Apr 29, 2026 OPEN
- EXTERIOR STRUCTURE WINDOWS, SKYLIGHTS DOOR FRAMESViolation VI-2026-026355Apr 29, 2026 OPEN
InvestigationsEvery inspector visit, including CLOSED outcomes8
HCEU INSPCase 550660
Aug 16, 2016 FAILED
HCEU INSPCase 550660
Oct 14, 2016 FAILED
HCEU INSPCase 550660
Dec 13, 2016 CLOSED
PRECOURTCase 550660
Nov 30, 2017 FAILED
PRECOURTCase 550660
Feb 12, 2018 FAILED
PRECOURTCase 550660
Feb 20, 2018 PASSED
L&I investigationCase CF-2026-042806
Apr 29, 2026 FAILED
L&I investigationCase CF-2026-042806
Jun 15, 2026 FAILED
Building certificationsInspection result and filed expiration date by L&I building ID0
No building certifications matched this parcel in the fetched City dataset.
Business licensesHistorical and active licenses are both retained1
RentalLicense 307256
M M NICOLAIS GROUP INC (AGT:HARDY REAL ESTATE LLC)
Revenue code 3202 · First issued Mar 2, 2005 Inactive Expiration Feb 28, 2019 Inactive Apr 29, 2019
AppealsApplication status and decision are separate City fields0
No appeals matched this parcel in the fetched City dataset.
City of Philadelphia OPA, L&I and Zoning Board records, shown as filed. A CLOSED investigation is an outcome label, not a missing visit; an appeal's application status and decision may differ.
Legal due diligence
What this record proves—and what it does not.
These checks are triggered by this property’s actual City rows. They identify the controlling document to verify; they do not declare a use legal, a building safe, or title clear.
3 resolve before relying
3 verify
Resolve before relyingZoning approval is not the occupancy fileThe record identifies more than one dwelling/use.
Why it mattersPhiladelphia says a zoning approval or Property Sales Certification can identify a use without proving that it was established under the Building Code. A change of use, unit count, exits, or fire rating can require a Building Permit and Certificate of Occupancy.
Verify nextVerify the lawful use, unit count, associated construction permits, and Certificate of Occupancy with L&I.
Open the controlling City guidance ↗Resolve before relying3 open L&I violations21 violation rows are retained in the City ledger.
Why it mattersOpen notices can accrue fees, block permits or license renewal, and move to court or collection. Standard initial notices generally have a 30-day appeal window; unsafe or imminently-dangerous notices have a much shorter window.
Verify nextRead the notice—not only the summary status—and confirm reinspection, fees, and appeal posture with L&I.
Open the controlling City guidance ↗Resolve before relyingA dated tax balance needs a current payoff$5,881.24 was recorded in the City’s 2022-06 delinquency snapshot for 2021.
Why it mattersThat is historical evidence, not today’s amount due. A current exemption, payment, credit, or assistance agreement can coexist with an older snapshot row.
Verify nextCheck period balances and request a dated Property Payoff statement for settlement.
Open the controlling City guidance ↗VerifyResidential form does not establish rental useOPA classifies the parcel as multi-family; no active Rental License row matched.
Why it mattersA multi-unit or mixed-use classification does not prove that space is currently rented. If dwelling space is rented, Philadelphia generally requires a current Rental License and related occupancy, tax, violation, and lead compliance.
Verify nextConfirm actual occupancy first; if any unit is rented, verify the license and legal unit count with L&I.
Open the controlling City guidance ↗VerifyFailed inspections are dated events—not the current condition6 failed, 1 passed, and 1 CLOSED investigation outcome are in the fetched history; the latest dated visit was FAILED on Jun 15, 2026.
Why it mattersA PASSED or FAILED value applies to that inspection visit. CLOSED is a separate source status; none of the three alone proves the parent permit or violation case closed—or describes today’s condition.
Verify nextOpen the parent case/permit for each material failure and confirm its later disposition.
Open the controlling City guidance ↗VerifyA separate Commercial Trash account may applyOPA classifies the parcel as multi-family. BlockReport does not receive a current Commercial Trash account balance.
Why it mattersPhiladelphia charges qualifying small commercial, mixed-use, and multi-unit properties that use City collection; exemptions and private collection can change applicability. A use category alone does not prove a fee is due.
Verify nextCheck the Commercial Trash account inside the date-effective Property Payoff.
Open the controlling City guidance ↗Closing file: checks no public-record summary can replace5 documents/searches to assign before settlement
Property Sales Certification
The seller must obtain Philadelphia’s certificate showing the base zoning, last use in the zoning record, and open violations. The City warns that it does not prove Building Code occupancy or show zoning overlays.
Next: Obtain the fresh certificate and compare it with the CO, permits, and Atlas overlays.
Official guidance ↗Date-effective City Property Payoff
The Tax Center Property Payoff covers Real Estate Tax, Commercial Trash, and L&I abatement-work invoices. Philadelphia says it does not include business-tax debts or liens, water and sewer charges, or fines for code violations.
Next: Request the City statement effective through settlement; read every period and invoice.
Official guidance ↗Professional title and water-lien searches
OPA ownership, deed summaries, and a zero tax balance are not clear title. Mortgages, judgments, municipal claims, water liens, easements, heirs, and other encumbrances require separate searches.
Next: Use a Pennsylvania lawyer/title company and obtain owner’s title insurance; order the separate water search/payoff.
Official guidance ↗Separate water-lien guidance ↗Seller-specific tax relief is not the buyer’s bill
LOOP and low-income or senior Real Estate Tax freezes depend on the qualifying owner and continued program eligibility; a buyer cannot assume the seller’s capped or frozen bill continues. A separately verified property abatement often remains with the property for its remaining term, but program-specific new-owner filing, use, and tax-compliance conditions still must be confirmed—not inferred from the reduced assessment alone.
Next: Have Revenue or OPA identify every current benefit, model the buyer’s bill without seller-specific relief, and confirm any verified abatement in writing.
Official guidance ↗Separate water-lien guidance ↗Seller disclosure and independent inspections
For a covered Pennsylvania residential transfer, obtain the statutory seller disclosure. It reports the seller’s knowledge; it is not a warranty, title search, code review, or substitute for inspections. Because OPA dates this building before 1978, separately obtain the required federal/City lead disclosures and any test results.
Next: Have the agreement and disclosure reviewed for this transaction’s coverage and exceptions.
Official guidance ↗Informational only—not a legal opinion, title report, code inspection, tax payoff, or substitute for a Pennsylvania lawyer, title company, inspector, or tax professional.
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.
Records to verify together
More than one separately dated public record deserves a current-status check.
Evidence: 3 open L&I violations · $5,881 appeared in the City's June 2022 delinquency snapshot · failed L&I inspection activity in 2026
Limit: A screening signal, not a foreclosure prediction. Tax entries are historical and must be verified with Philadelphia Revenue.
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 1915: 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.
If you own it
3 open violations: the clock matters
Most L&I appeals must be filed within 30 days; unsafe or imminently dangerous orders can carry a shorter deadline. Unresolved notices can lead to fees, court enforcement, City abatement work, and liens. Read the dated notice and verify its current status with L&I.
$5,881 in the June 2022 delinquency snapshot
The City recorded this amount in June 2022. It may since have been paid, reduced, or increased; verify the current balance directly with Philadelphia Revenue.
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
M M Nicolais Group INC · corporate / LLC owner
• Owns 2 properties across Philadelphia under this name, assessed at $728K combined
• Tax bills mail to 1508 N 17th St, Philadelphia PA, 19121
The investment read
How this building 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
$319,100
2026 billed-year assessment · 2027: $276,800 · built 1915
Price / sq ft
$117
block $134 · below block
Appreciation
+127%
+9%/yr, city 6.5%
In 5 years (~2031)
~$278K
+9%/yr own pace held 5 yrs — extrapolation, not a forecast
Est. tax bill / yr
$4,467
1.61% effective
Jun 2022 tax snapshot
$6K
recorded then · verify current
Gross yield
3.2%
≈$749/mo rent
Times sold
1
Value vs. the block, over time — sales, permits & L&I events marked on the line
This houseBlock median & rangeL&I violationPermitInspection
The paper trail
Historysold $115K (2004); 18 L&I violations (2016); Inspection failed ×2 (2016); Inspection failed (2017); L&I: 1 failed, 1 passed (2018); 3 L&I violations (2026); Inspection failed ×2 (2026).
- 2004 $115KSold
- 2016 18 L&I violationsL&IInspection failed ×2L&I visit
- 2017 Inspection failedL&I visit
- 2018 L&I: 1 failed, 1 passedL&I visit
- 2026 3 L&I violationsL&IInspection failed ×2L&I visit
Flags: 3 open L&I violations · $6K recorded in the June 2022 delinquency snapshot — verify current balance. 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.
Stories
3
Interior
2,364 sqft
livable area
Lot
1,530 sqft
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 1710 Diamond 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 (2004) a 30-year mortgage ran about 5.84% — 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
1710 Diamond St sits on the 1700 block of Diamond St. Open the block report to compare its parcels, ownership and public-record history.
See the whole block →Next door: 1708 Diamond St · 1712 Diamond 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, 1:38 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: queried. “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)