5142 W WARWICK AVE, CHICAGO, IL 60641

Section 1 — Executive Assessment & Tax Reduction Summary

Section 2 — Lack of Uniformity Comparable Property Grid (Assessor Nbhd 71150)

Under Article IX, Section 4 of the Illinois Constitution, real estate assessments must be uniform within the same class and taxing jurisdiction. Below are 5 comparable Class 2-03 properties in Assessor Neighborhood 71150 assessed at a lower Building Assessed Value per square foot than the Subject Property:

Section 3 — Written Appeal Brief (Ready to Paste or Attach as PDF)

TO THE COOK COUNTY ASSESSOR / BOARD OF REVIEW — 2026 RESIDENTIAL UNIFORMITY APPEAL BRIEF

Subject Property: 5142 W WARWICK AVE, CHICAGO, IL 60641
Permanent Index Number (PIN): 13-21-216-024-0000
Township: Jefferson (Code 71) | Assessor Neighborhood Code: 71150 | Property Class: 2-03

1. BASIS OF APPEAL: LACK OF UNIFORMITY (ILLINOIS CONSTITUTION ART. IX, SEC. 4)
The Subject Property is a 105-year-old (built 1921) Class 2-03 one-story single-family residence containing 1,128 square feet of building area on a 3,437 square foot parcel on Block 216 of Section 21 in Jefferson Township (Assessor Neighborhood 71150).

For Tax Year 2026/2025, the Subject Property's improvement (building) is assessed at $19,971, or $17.70 per square foot of building area ($32,001 Total Assessed Value).

2. COMPARABLE UNIFORMITY EVIDENCE ON THE IDENTICAL TAX BLOCK (13-21-216)
A review of Class 2-03 single-family residences on the exact same tax block (PIN prefix 13-21-216, Neighborhood 71150) demonstrates that the Subject Property is assessed substantially above comparable neighboring residences:
• PIN 13-21-216-002-0000 (5153 W Grace St): Class 2-03, 1,188 sq ft — Building AV $13,875 ($11.68 / sq ft)
• PIN 13-21-216-003-0000 (5151 W Grace St): Class 2-03, 1,114 sq ft — Building AV $13,875 ($12.46 / sq ft)
• PIN 13-21-216-019-0000 (5154 W Warwick Ave, 3 doors west, Masonry, Full Basement, 1,250 sq ft): Building AV $15,875 ($12.70 / sq ft)
• PIN 13-21-216-026-0000 (5132 W Warwick Ave, 2 doors east, Full Basement, 2-Car Garage, 1,416 sq ft): Building AV $18,000 ($12.71 / sq ft)
• PIN 13-21-216-008-0000 (5135 W Grace St, Full Basement, 1,089 sq ft): Building AV $15,003 ($13.78 / sq ft)
• Additionally, the immediately adjacent property next door at 5140 W Warwick Ave (PIN 13-21-216-025-0000), built in the exact same year (1921) with the exact same building square footage (1,128 sq ft) and identical 3,437 sq ft lot size, carries a Building Assessed Value of $16,971 ($15.05 / sq ft) — $3,000 lower than the Subject Property.

3. REQUESTED RELIEF
The median building assessment of the five comparable Class 2-03 properties on the same block is $12.70 per square foot. Applying the neighborhood comparable median of $12.70 per square foot to the Subject Property's 1,128 square feet yields a uniform Building Assessed Value of $14,326. Added to the uncontested Land Assessed Value of $12,030, the Petitioner respectfully requests that the Total Assessed Value be reduced from $32,001 to $26,356 (a reduction of $5,645, or 17.6%).

Section 4 — 10-Minute Step-by-Step Self-Guided (Pro Se) Filing Instructions

1. Open the Official County Portal: For Assessor filings, visit cookcountyassessoril.gov/online-appeals. For Board of Review filings, visit appeals.cookcountyboardofreview.com. Filing is 100% free.
2. Select "Homeowner / Pro Se" & Enter Subject PIN: Enter your 14-digit PIN (13-21-216-024-0000) and select Lack of Uniformity (and Overvaluation if applicable) as the reason for appeal.
3. Enter the 5 Comparable PINs from Section 2: Paste the comparable 14-digit PINs listed in Section 2 into the Comparable Properties step.
4. Upload This PDF Evidence Packet & Paste Narrative Brief: Click "Print / Save as PDF" at the top of this page to save this packet as a PDF, attach it under Supporting Documentation, and paste the Section 3 Written Appeal Brief into the comments/notes box.