2026 assessment
$321K
OPA value, not a listing price
House report
21 W Mount Airy Ave
2 bd1 ba2 stories1,230 sqftRSA5built 1920
Property at a glanceHouse
Owner-occupancy signal
ZIP 19119 area
Mount Airy
0 block of W Mount Airy Ave
Assessment and City record timeline
Published City assessments for this house against its block and ZIP. Dated City filings are marked on the same line. Select one to read it. Assessments are tax-roll values, not sale prices or appraisals.
- OPA assessment · 2016$163K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2017$163K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2018$163K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2019$186K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2020$178K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2021$178K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2022$178K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2023$277K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2024$277K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2025$321K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2026$321K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- OPA assessment · 2027$339K assessed valueOPA’s value on the City tax roll for that year. It is not an appraisal, listing price, sale price, or live tax balance.How Philadelphia property assessments work ↗
- Permit · 2007-12-18PlumbingThis permit category usually covers water, drainage, fixtures, or other plumbing work. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2014-06-26ZoningThis permit category usually covers the property’s allowed use, dimensions, occupancy, or site configuration. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2015-04-10ZoningThis permit category usually covers the property’s allowed use, dimensions, occupancy, or site configuration. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2015-04-10AdditionThis permit category usually covers construction, repair, alteration, addition, or occupancy work. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2015-04-24ElectricalThis permit category usually covers electrical installation, alteration, replacement, or repair. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2015-05-14PlumbingThis permit category usually covers water, drainage, fixtures, or other plumbing work. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
- Permit · 2024-12-10AlterationsThis permit category usually covers construction, repair, alteration, addition, or occupancy work. The approved scope—not the short category—defines what was authorized, and issuance alone does not prove completion.Philadelphia construction and repair permits ↗
Property assessmentBlock median & rangeZIP 19119 (Mount Airy) medianAssessmentPermit
Scroll horizontally to move through the years. Each icon sits on its recorded date; records without a day are labeled and centered within their year. Select one to explain the filing.
Every dated record7 events · exact dates, newest first
- PermitAlterations
- PermitPlumbing
- PermitElectrical
- PermitZoning
- PermitAddition
- PermitZoning
- PermitPlumbing
Informational only. Not investment advice or a consumer report (FCRA).
Verify the public record
Property tax
$3,091/year estimated property tax
2026 taxable assessment $220,800 × 1.3998%. This is an estimate, not a bill or account balance. The City maintains payments, credits, interest, and the current amount due.
OPA has published a 2027 assessment of $339,100. It is not the 2026 billed-year value.
Payments, credits, interest, and the current amount due are maintained by the City.
OPA 0920565002026 OPA removes $100,000 from the taxable assessment through the owner-occupant exemption.
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.”
The property, on paper
OPA physical field record.
Bedrooms
2
Bathrooms
1
Stories
2
Interior
1,230 sqft
livable area
Lot
1,597 sqft
Basement
Full
city code D
Heat
Hot water / radiators
city code B
Central air
No
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
RSA5
city zoning code
OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.
Block context
0 block of W Mount Airy Ave. Compare parcels, ownership, and public-record history.
See the whole block →Next door: 19 W Mount Airy Ave · 23 W Mount Airy Ave
L&I licenses checked through Jul 25, 2026
No business or residential license records
No business license or residential registration matched this OPA parcel in the latest City data.
Open every source row 7 dated rows
- PermitAlterations
Permit PP-2024-016709 · Completed
Replace curb trap, fresh air inlet and main drain
- PermitPlumbing
Permit 610240 · COMPLETED
RUN DRAIN AND WATER LINES TO NEW KITCHEN SINK FIRST FLOOR POWER ROOM AND LAUNDRY AND BATHROOM ON SECOND FLOOR (NORTH DISTRICT)
- PermitElectrical
Permit 605306 · COMPLETED
RE-WIRE BATHROOM, BEDROOMS, LAUNDRY ROOM, KITCHEN, WITH SWITCHES, LIGHTS, RECEPTS, SMOKE DETECTORS & ADD RECESSED LIGHTING IN DINING ROOM AND LIVING ROOM, WIRE NEW ADDITION AT BACK OF THE HOUSE AS PER 2008 NEC (NORTH DISTRICT)
- PermitZoning
Permit 596587 · COMPLETED
PARTIAL DEMO (MUD ROOM TO BE REMOVED), ADDITION TO REAR OF HOUSE (2 STORY), SINGLE-FAMILY DWELLING
- PermitAddition
Permit 596589 · COMPLETED
PARTIAL DEMOLITION OF STRUCTURE AT REAR, CONSTRUCTION OF NEW TWO (2) STORY WOOD FRAME ADDITION WITH NEW STEEL HEADERS AT MASONRY OPENINGS, LVL LEDGER, ONE (1) HOUR RATED WALL AT NORTHEASTERLY PROPERTY LINE (NO OPENINGS PERMITTED AT THIS WALL) AND EXTERIOR STAIR. INTERIOR ALTERATIONS AT KITCHEN/BEDROOM/BATHROOM PORTIONS OF FIRST AND SECOND FLOORS. SEPARATE PERMITS REQUIRED FOR ALL MECHANICAL, ELECTRICAL AND PLUMBING WORK.
- PermitZoning
Permit 544298 · COMPLETED
DEMOLITION REAR ONE STORY ADDITION AND CONSTRUCT A TWO STORY ADDITION IN ITS PLACE (HEIGHT NOT TO EXCEED 38'FT) AS PART OF AN EXISTING ATTACHED SINGLE FAMILY DWELLING
- PermitPlumbing
Permit 122391 · COMPLETED
REMOVE AND INSTALL LAV, WATER CLOSET, BATHTUB, MOVE LAV DRAIN TO WALL
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 26, 2026, 11:55 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)