Who owns your block
1700 block of N 21st St
A mixed-ownership block: 44% owner-occupied, 24% investor-held, with 5 open code violations and 2 homes behind $29,122 on taxes.
The typical home here is up 338% since 2016, now about $323K. Property taxes are climbing about 20% a year.
- Owner-occupied
- Investor / LLC
- Absentee
- Vacant
- Has violations
By the Numbers
How fast it's moving
Assessed-value change for the typical home. Philadelphia taxes a flat 1.3998% of value, so the bill moves with it.
The makeup of the block
Every home, plotted by size and assessed value — press play and watch the block reprice from 2016 to 2027. One bubble per house (area = lot size), colored by who owns it; a gold ring marks tax-abated new construction. Click a bubble for its report.
- Owner-occupied
- Investor / LLC
- Absentee
- Vacant
- Tax-abated
- Bubble = lot size
- → bigger interior · ↑ higher value
Assessed values from the city's year-by-year assessment record — a proxy for price, lumpy in reassessment years.
How the block compares
The typical home here is $323K — about 1.4× the citywide median, and above the ZIP 19121 median of $167K. The same block, read against everyone else in the ZIP 19121 and across Philadelphia.
| This block | ZIP 19121 | Philadelphia | |
|---|---|---|---|
| Median home value | $323K | $167K | $223K |
| Owner-occupied | 16% | 20% | 41% |
Safety & quality of life
Within 200 metres of the block over the last 12 months: 225 reported crimes (70 violent) and 82 resident 311 requests to the city.
Most reported crimes
Top 311 complaints
Philadelphia Police incident reports and 311 service requests within 200m, trailing 12 months. Reported location, not necessarily where an incident occurred.
Schools
The public schools this block is zoned for — its official School District of Philadelphia catchments.
Catchment assignments from the School District of Philadelphia via City of Philadelphia open data. Confirm with the District before enrollment decisions.
What it's worth, and where taxes are going
- $323K typical home, up +338% since 2016
- Tax bill $423 to $3,047 a year, +20%/yr and compounding
- Whole block: $8.2M assessed, $82,388/yr to the city, about $3,296 per home
Median assessed value · 2016–2027
▲ +338% since 2016
Estimated property tax · per home, per year
▲ +620% since 2016 · ~+20%/yr
Who really pays — effective tax rate, one dot per home
1735 N 21st St is assessed at $382K but pays $1,086 a year — about 20% of the $5,353 it would owe at the statutory rate, because its new-construction value is abated.
The block as an asset
Read like a financial asset, this block has beaten the Philadelphia market, compounding +14.4% a year against the city's 6.5%.
Indexed performance · this block vs. the Philadelphia market
Rebased to 100 in 2016, like a stock against its index. $100 in the typical home here would be worth $438 today versus $201 across Philadelphia — this block outpaced the market.
Return is from assessed-value history (a proxy for market price, lumpy in reassessment years); rental yield is estimated from ACS area rents. Informational only, not investment advice.
How often it changes hands
This block has recorded 43 arm's-length sales since 2002. The typical home has sold 1 time in that window, while 12 have not changed hands at all.
Every recorded sale · price & date
Who owns it
Ownership of 25 parcels
- Owner-occupied 10
- Investor / LLC 6
- Absentee individual 6
- Vacant 3
Value distribution today
| Owner | On block | Owns citywide | Portfolio value | Source |
|---|---|---|---|---|
| Philadelphia Housing Auth (individual) | 3 | 4773 | $1418M | phila.gov ↗ |
| Seth Brodsky (individual) | 2 | 9 | $3.0M | phila.gov ↗ |
| Mrae Development Group Llc | 1 | 5 | $1.4M | phila.gov ↗ |
| Lagos Homes Llc | 1 | 5 | $3.4M | phila.gov ↗ |
| Pac Media Productions Llc | 1 | 3 | $866K | phila.gov ↗ |
| Two Wow Properties Llc | 1 | 2 | $417K | phila.gov ↗ |
| 1721 N 21st Llc | 1 | 1 | $910K | phila.gov ↗ |
| Giant Returns Llc | 1 | 1 | $382K | phila.gov ↗ |
House by house
All 25 homes on the block — value and 12-year trajectory, ownership, and the paper trail on the ones that were bought, built, torn down, or flipped. Sorted up the street; each links to its full city record — or download the roster (CSV).
Every house's assessed value, 2016–2027 — each line is one home
Worth a look
| Address | Ownership | Value & trend | Bd/Ba | Sq ft | Built | Sales | Flags |
|---|---|---|---|---|---|---|---|
| 1703 N 21ST ST New constructionbuilt new under a 2011 permit (tax-abated). | Absentee individual | $360K | —/— | 2,520 | 1915 | 0 | abated |
| 1705 N 21ST ST TradedTraded 2×: $1.3M in 2012 → $29K in 2013 (-98%). | Investor / LLC | $355K | 3/1 | 2,460 | 1915 | 2 | |
| 1707 N 21ST ST ImprovedOwner pulled a demolition permit in 2018. | Vacant | $78K | —/— | — | — | 0 | tax lien |
| 1709 N 21ST ST New constructionbuilt new under a 2015 permit (tax-abated). | Absentee individual | $206K | —/— | 2,092 | 1915 | 0 | abated |
| 1711 N 21ST ST New constructionBought for $112K in 2016, built new under a 2009 permit, sold for $300K in 2023. | Investor / LLC | $243K | 6/3 | 2,460 | 1915 | 6 | |
| 1713 N 21ST ST Frequently tradedTraded 4×: $27K in 2006 → $270K in 2017 (+900%). | Owner-occupied | $341K | 6/2 | 2,460 | 1920 | 4 | |
| 1715 N 21ST ST | Owner-occupied | $207K | —/— | 2,123 | 1920 | 0 | |
| 1717 N 21ST ST Renovated & sold onBought for $1K in 2006, zoning/use permit in 2007, sold for $165K in 2014 (+16400%). | Absentee individual | $468K | 7/3 | 2,460 | 1920 | 4 | rented |
| 1719 N 21ST ST Renovated & sold onBought for $1K in 2007, major alteration permit in 2007, sold for $165K in 2014 (+16400%). | Absentee individual | $463K | 7/3 | 2,421 | 1920 | 4 | rented |
| 1721 N 21ST ST New constructionBought for $10K in 2013, built new under a 2020 permit. | Investor / LLC | $910K | —/— | 11,320 | 2021 | 1 | rented |
| 1725 N 21ST ST Torn down & rebuiltOld house bought for $75K in 2018, demolished and rebuilt (2019), then sold for $765K in 2021. | Investor / LLC | $850K | 7/— | 2,838 | 2021 | 4 | rentedtax lien |
| 1727 N 21ST ST Improved | Vacant | $78K | —/— | — | — | 0 | tax lien |
| 1729 N 21ST ST New constructionbuilt new under a 2011 permit (tax-abated). | Absentee individual | $323K | 4/2 | 2,412 | 1915 | 0 | abated |
| 1731 N 21ST ST HistoryL&I violation (2020). | Vacant | $78K | —/— | — | — | 0 | |
| 1733 N 21ST ST Renovated & sold onBought for $33K in 2012, major alteration permit in 2016, sold for $225K in 2023 (+582%). | Investor / LLC | $225K | —/— | 2,412 | 1915 | 2 | 2 viol |
| 1735 N 21ST ST New constructionbuilt new under a 2013 permit (tax-abated), sold for $50K in 2019. | Investor / LLC | $382K | 6/3 | 4,020 | 1920 | 1 | abated |
| 1737 N 21ST ST Frequently tradedTraded 3×: $84K in 2018 → $490K in 2020 (+487%). | Owner-occupied | $359K | 8/8 | 2,412 | 1915 | 3 | |
| 1739 N 21ST ST Renovated & sold onBought for $45K in 2010, electrical permit in 2010, sold for $305K in 2020 (+10067%). | Owner-occupied | $462K | 4/2 | 2,412 | 1915 | 4 | rented |
| 1741 N 21ST ST Renovated & sold onBought for $20K in 2010, administrative permit in 2011, sold for $285K in 2020 (+10862%). | Owner-occupied | $338K | 6/2 | 2,412 | 1915 | 5 | |
| 1743 N 21ST ST New constructionbuilt new (tax-abated). | Owner-occupied | $221K | 5/1 | 2,412 | 1920 | 0 | abated3 violtax lien |
| 1745 N 21ST ST ImprovedOwner pulled a plumbing permit in 2008. | Owner-occupied | $221K | 5/1 | 2,412 | 1920 | 0 | |
| 1747 N 21ST ST | Owner-occupied | $221K | 5/1 | 2,412 | 1920 | 0 | abated |
| 1749 N 21ST ST | Owner-occupied | $207K | 5/1 | 2,123 | 1920 | 0 | abated |
| 1751 N 21ST ST Renovated & sold onBought for $34K in 2016, mechanical permit in 2017, sold for $492K in 2022 (+1347%). | Absentee individual | $338K | 2/2 | 2,412 | 1920 | 3 | |
| 1753 N 21ST ST ImprovedOwner pulled a administrative permit in 2011. | Owner-occupied | $218K | —/— | 3,402 | 1920 | 0 | tax lien |
Neighborhood
Neighborhood income and demographics are coming soon.
Generated 2026-07-08 from public City of Philadelphia records · Download this block's data (CSV)