Who owns your block
1800 block of S 21st St
A mostly owner-occupied block: 73% of homes are lived in by their owners, with 10 open code violations and 8 homes behind $15,717 on taxes.
The typical home here is up 177% since 2016, now about $203K. Property taxes are climbing about 13% a year though the increases have eased lately.
- 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 $203K — about 0.9× the citywide median, and below the ZIP 19145 median of $242K. The same block, read against everyone else in the ZIP 19145 and across Philadelphia.
| This block | ZIP 19145 | Philadelphia | |
|---|---|---|---|
| Median home value | $203K | $242K | $223K |
| Owner-occupied | 42% | 46% | 41% |
Safety & quality of life
Within 200 metres of the block over the last 12 months: 109 reported crimes (31 violent) and 332 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
- $203K typical home, up +177% since 2016
- Tax bill $660 to $2,616 a year, +13%/yr and compounding
- Whole block: $7.4M assessed, $82,563/yr to the city, about $2,502 per home
Median assessed value · 2016–2027
▲ +177% since 2016
Estimated property tax · per home, per year
▲ +296% since 2016 · ~+13%/yr
Who really pays — effective tax rate, one dot per home
1834 S 21st St is assessed at $187K but pays $1,409 a year — about 54% of the $2,623 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 +9.7% 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 $277 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 41 arm's-length sales since 2000. The typical home has sold 1 time in that window, while 14 have not changed hands at all.
Every recorded sale · price & date
Who owns it
Ownership of 33 parcels
- Owner-occupied 24
- Investor / LLC 6
- Absentee individual 3
Value distribution today
The block's largest owner, Kat Property Investments Llc, carries 8 open violations across 6 properties it owns around the city.
| Owner | On block | Owns citywide | Portfolio value | Source |
|---|---|---|---|---|
| Kat Property Investments Llc | 1 | 6 | $1.3M | phila.gov ↗ |
| Wilson -Young Development | 1 | 2 | $498K | phila.gov ↗ |
| Isb Partners Llc | 1 | 1 | $212K | phila.gov ↗ |
| Eclectic 21 Design Llc | 1 | 1 | $200K | phila.gov ↗ |
| Js Advisory Llc | 1 | 1 | $213K | phila.gov ↗ |
| House Of Guz Llc | 1 | 1 | $215K | phila.gov ↗ |
| L E Fj A Prop Ii Inc | 1 | 1 | $223K | phila.gov ↗ |
House by house
All 33 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 |
|---|---|---|---|---|---|---|---|
| 1801 S 21ST ST ImprovedBought for $45K in 2006. Owner pulled a use permit in 2018. | Owner-occupied | $380K | 5/4 | 2,430 | 1920 | 1 | |
| 1803 S 21ST ST | Investor / LLC | $212K | 3/1 | 1,404 | 1920 | 1 | |
| 1805 S 21ST ST ImprovedOwner pulled a plumbing permit in 2016. | Owner-occupied | $210K | 3/1 | 1,404 | 1920 | 0 | |
| 1807 S 21ST ST New constructionBought for $145K in 2019, built new under a 2019 permit, sold for $328K in 2021. | Owner-occupied | $314K | 3/1 | 1,291 | 1920 | 2 | |
| 1809 S 21ST ST History3 L&I violations (2010); L&I violation (2016). | Owner-occupied | $200K | 3/1 | 1,281 | 1920 | 0 | |
| 1811 S 21ST ST ImprovedBought for $10K in 2013. Owner pulled a alteration permit in 2017. | Owner-occupied | $194K | —/— | 1,271 | 1920 | 1 | tax lien |
| 1813 S 21ST ST History2 L&I violations (2019); 4 L&I violations (2020); 3 L&I violations (2021); 13 L&I violations incl UNSAFE STRUCTURE (2022). | Absentee individual | $187K | —/— | 1,684 | 1920 | 0 | 3 viol |
| 1815 S 21ST ST ImprovedBought for $35K in 2010. Owner pulled a electrical permit in 2011. | Absentee individual | $310K | —/— | 2,086 | 1920 | 2 | rented |
| 1816 S 21ST ST ImprovedBought for $6K in 2002. Owner pulled a alterations permit in 2021. | Investor / LLC | $328K | 2/1 | 1,734 | 1920 | 6 | |
| 1817 S 21ST ST ImprovedOwner pulled a alterations permit in 2025. | Owner-occupied | $203K | —/— | 1,328 | 1920 | 0 | |
| 1818 S 21ST ST New constructionbuilt new under a 2019 permit. | Owner-occupied | $238K | —/— | 1,296 | 1920 | 0 | |
| 1819 S 21ST ST Frequently tradedTraded 3×: $25K in 2002 → $365K in 2025 (+1360%). | Owner-occupied | $305K | 3/2 | 1,276 | 1920 | 3 | |
| 1820 S 21ST ST ImprovedOwner pulled a alterations permit in 2023. | Owner-occupied | $200K | 3/1 | 1,296 | 1920 | 0 | |
| 1821 S 21ST ST HistoryL&I violation (2007); 3 L&I violations (2008); 2 L&I violations (2013). | Investor / LLC | $193K | 3/1 | 1,172 | 1920 | 0 | |
| 1822 S 21ST ST ImprovedBought for $170K in 2026. Owner pulled a electrical permit in 2016. | Owner-occupied | $199K | 3/1 | 1,296 | 1920 | 1 | |
| 1823 S 21ST ST ImprovedOwner pulled a plumbing permit in 2019. | Owner-occupied | $184K | 3/1 | 1,102 | 1920 | 0 | |
| 1824 S 21ST ST New constructionbuilt new under a 2025 permit, sold for $170K in 2025. | Investor / LLC | $213K | 4/1 | 1,540 | 1920 | 1 | |
| 1825 S 21ST ST Renovated & sold onBought for $83K in 2006, major alteration permit in 2014, sold for $215K in 2025 (+159%). | Investor / LLC | $215K | 4/1 | 1,484 | 1920 | 3 | tax lien |
| 1826 S 21ST ST TradedTraded 2×: $10K in 2002 → $235K in 2024 (+2250%). | Investor / LLC | $223K | —/— | 2,006 | 1920 | 2 | |
| 1828 S 21ST ST Renovated & sold onBought for $18K in 2004, major alteration permit in 2014, sold for $145K in 2017 (+706%). | Absentee individual | $197K | 3/1 | 1,386 | 1920 | 4 | |
| 1829 S 21ST ST ImprovedOwner pulled a alterations permit in 2024. | Owner-occupied | $224K | 4/1 | 1,584 | 1920 | 0 | 4 viol |
| 1830 S 21ST ST Renovated & sold onBought for $40K in 2000, alterations permit in 2022, sold for $205K in 2023 (+413%). | Owner-occupied | $183K | 3/1 | 1,280 | 1920 | 3 | |
| 1831 S 21ST ST ImprovedBought for $168K in 2025. Owner pulled a alterations permit in 2025. | Owner-occupied | $193K | 3/1 | 1,324 | 1920 | 1 | |
| 1832 S 21ST ST Frequently tradedTraded 4×: $30K in 2011 → $195K in 2020 (+550%). | Owner-occupied | $254K | 3/1 | 1,280 | 1920 | 4 | |
| 1833 S 21ST ST ImprovedOwner pulled a addition and/or alterations permit in 2026. | Owner-occupied | $198K | 3/1 | 1,324 | 1920 | 0 | |
| 1834 S 21ST ST New constructionbuilt new (tax-abated). | Owner-occupied | $187K | 3/1 | 1,280 | 1920 | 0 | abated |
| 1835 S 21ST ST | Owner-occupied | $206K | 3/1 | 1,465 | 1920 | 0 | |
| 1836 S 21ST ST HistoryL&I violation (2013); sold $60K (2013); 5 L&I violations incl UNSAFE STRUCTURE (2023). | Owner-occupied | $188K | 3/1 | 1,280 | 1920 | 1 | tax lien |
| 1837 S 21ST ST Frequently tradedTraded 3×: $51K in 2006 → $250K in 2022 (+394%). | Owner-occupied | $279K | 3/2 | 1,465 | 1920 | 3 | |
| 1838 S 21ST ST ImprovedOwner pulled a alteration permit in 2010. | Owner-occupied | $189K | 3/1 | 1,280 | 1920 | 0 | |
| 1839 S 21ST ST | Owner-occupied | $199K | 3/1 | 1,340 | 1920 | 1 | |
| 1840 S 21ST ST History3 L&I violations (2010). | Owner-occupied | $281K | —/— | 1,872 | 1920 | 0 | |
| 1841 S 21ST ST New constructionbuilt new under a 2021 permit (tax-abated), sold for $165K in 2026. | Owner-occupied | $94K | —/— | 2,205 | — | 1 | abated3 viol |
Neighborhood
Neighborhood income and demographics are coming soon.
Generated 2026-07-08 from public City of Philadelphia records · Download this block's data (CSV)