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Where OPA assigns the most improvement value per interior square foot

Blocks ranked by the median OPA improvement component divided by recorded interior area for homes. This is an assessment allocation, not replacement cost, renovation quality, or a separate building appraisal. 13,674 eligible blocks, using the stated public-record basis. Every linked entry opens its underlying report.

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No. 1 on this board$1081/interior sqft500-599 Walnut St

35 homes · 1 effective structure · Building-dominated, largest address 100% · 2027 published assessment roll · ZIP 19106 · open the underlying report →

Compared
13,674 eligible blocks
Basis
OPA assessment roll
Record date
2026-07-25

Where does OPA assign the most improvement value per interior square foot?

2027 published assessment roll · current Top 5 in 35 secondsTranscript and video details →

How to read this board

One metric, one stated population, one source date.

The large value is the ranking metric. Open a row for its underlying ZIP, block, or property report; use the method below before treating the comparison as a conclusion.

Complete ranking

Top 25 blocks, ranked

Blocks ranked by the median OPA improvement component divided by recorded interior area for homes. This is an assessment allocation, not replacement cost, renovation quality, or a separate building appraisal. Read the source and date with the value; rankings are comparisons, not appraisals or legal conclusions.

13,674 eligible blocksOPA assessment roll2026-07-25
Ranking metricWhere OPA assigns the most improvement value per interior square footSource = OPA assessments
  1. 500-599 Walnut St35 homes · 1 effective structure · Building-dominated, largest address 100% · 2027 published assessment roll · ZIP 19106$1081/interior sqft
  2. 200-299 S 25th St76 homes · 9 effective structures · Building-dominated, largest address 89.5% · 2027 published assessment roll · ZIP 19103$953/interior sqft
  3. 100-199 S 18th St145 homes · 1 effective structure · Building-dominated, largest address 100% · 2027 published assessment roll · ZIP 19103$876/interior sqft
  4. 200-299 W Washington Sq61 homes · 5 effective structures · Building-dominated, largest address 83.6% · 2027 published assessment roll · ZIP 19106$779/interior sqft
  5. 1700-1799 Rittenhouse Sq37 homes · 7 effective structures · Building-dominated, largest address 83.8% · 2027 published assessment roll · ZIP 19103$739/interior sqft
  6. 1600-1699 Locust St18 homes · 1 effective structure · Building-dominated, largest address 100% · 2027 published assessment roll · ZIP 19102$630/interior sqft
  7. 1900-1999 Rittenhouse Sq52 homes · 12 effective structures · Building-dominated, largest address 78.8% · 2027 published assessment roll · ZIP 19103$623/interior sqft
  8. 0-99 S 16th St116 homes · 1 effective structure · Building-dominated, largest address 100% · 2027 published assessment roll · ZIP 19102$618/interior sqft
  9. 400-499 S Broad St163 homes · 1 effective structure · Building-dominated, largest address 100% · 2027 published assessment roll · ZIP 19146$616/interior sqft
  10. 8200-8299 Germantown Ave22 homes · 3 effective structures · Building-dominated, largest address 90.9% · 2027 published assessment roll · ZIP 19118$601/interior sqft
  11. 2500-2599 Waverly St24 homes · 24 effective structures · 2027 published assessment roll · ZIP 19146$596/interior sqft
  12. 1900-1999 Delancey Pl16 homes · 16 effective structures · 2027 published assessment roll · ZIP 19103$576/interior sqft
  13. 1400-1499 S Penn Sq267 homes · 1 effective structure · Building-dominated, largest address 100% · 2027 published assessment roll · ZIP 19102$575/interior sqft
  14. 2400-2499 Delancey Pl21 homes · 16 effective structures · Building-dominated, largest address 28.6% · 2027 published assessment roll · ZIP 19103$561/interior sqft
  15. 400-499 S Croskey St35 homes · 14 effective structures · 2027 published assessment roll · ZIP 19146$557/interior sqft
  16. 1800-1899 Delancey Pl36 homes · 35 effective structures · 2027 published assessment roll · ZIP 19103$554/interior sqft
  17. 2500-2599 Pine St31 homes · 31 effective structures · 2027 published assessment roll · ZIP 19103$554/interior sqft
  18. 2000-2099 Delancey Pl38 homes · 33 effective structures · 2027 published assessment roll · ZIP 19103$550/interior sqft
  19. 2500-2599 Panama St25 homes · 25 effective structures · 2027 published assessment roll · ZIP 19103$542/interior sqft
  20. 2100-2199 Delancey Pl41 homes · 33 effective structures · 2027 published assessment roll · ZIP 19103$536/interior sqft
  21. 2400-2499 Panama St22 homes · 22 effective structures · 2027 published assessment roll · ZIP 19103$530/interior sqft
  22. 300-399 S 25th St13 homes · 13 effective structures · 2027 published assessment roll · ZIP 19103$529/interior sqft
  23. 2100-2199 Market St299 homes · 1 effective structure · Building-dominated, largest address 100% · 2027 published assessment roll · ZIP 19103$528/interior sqft
  24. 2400-2499 Waverly St27 homes · 27 effective structures · 2027 published assessment roll · ZIP 19146$525/interior sqft
  25. 1700-1799 Spruce St13 homes · 3 effective structures · Building-dominated, largest address 46.2% · 2027 published assessment roll · ZIP 19103$518/interior sqft
Source: OPA Property Assessments · Office of Property Assessment · City of Philadelphia open data · indexed reports fetched 2026-07-16 through 2026-07-29
Exact method and eligibility

Population: blocks with at least 12 qualifying homes. For each home, OPA improvement assessment is taxable building plus exempt building; that component is divided by recorded interior area greater than 200 square feet. Metric: block median of those parcel ratios. It is not replacement cost or a condition judgment.

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