| | Harrisburg, IL | Gretna, LA | United States |
| Median Home Age | 60 | 58 | 42 |
| Median Home Cost | $75,600 | $219,500 | $338,100 |
| Home Appr. Last 12 months | 14.3% | 12.3% | 16.6% |
| Home Appr. Last 5 yrs. | 35.0% | 40.6% | 57.0% |
| Home Appr. Last 10 yrs. | 35.3% | 61.9% | 101.1% |
| Property Tax Rate | $18.5 | $5.9 | $11.0 |
| Homes Owned | 55.2% | 44.2% | 57.4% |
| Housing Vacant | 14.9% | 11.2% | 11.2% |
| Homes Rented | 29.9% | 44.6% | 31.4% |
| space | | | |
| Avg Rent For Home Or Apartment | | | |
| | Harrisburg, IL | Gretna, LA | United States |
| Average Rent | $920 | $1,330 | $1,840 |
| Studio Apartment | $470 | $760 | $1,080 |
| 1 Bedroom Home or Apartment | $520 | $890 | $1,180 |
| 2 Bedroom Home or Apartment | $690 | $1,050 | $1,430 |
| 3 Bedroom Home or Apartment | $930 | $1,350 | $1,860 |
| 4 Bedroom Home or Apartment | $930 | $1,580 | $2,160 |
| space1 | | | |
| Vacant Housing | | | |
| | Harrisburg, IL | Gretna, LA | United States |
| Vacant For Rent | 2.1% | 3.1% | 1.9% |
| Vacant Rented | 0.6% | 0.2% | 0.4% |
| Vacant For Sale | 2.2% | 0.9% | 0.7% |
| Vacant Sold | 0.7% | 0.3% | 0.4% |
| Vacant Vacation | 1.7% | 0.2% | 3.6% |
| Vacant Other | 7.5% | 6.4% | 4.1% |
| space2 | | | |
| Owner-Occupied Housing Value | | | |
| | Harrisburg, IL | Gretna, LA | United States |
| Less Than $20,000 | 7.5% | 0.7% | 2.6% |
| $20,000 to $39,999 | 9.9% | 0.6% | 2.4% |
| $40,000 to $59,999 | 15.3% | 1.5% | 2.8% |
| $60,000 to $79,999 | 23.5% | 1.7% | 3.9% |
| $80,000 to $99,999 | 9.5% | 4.9% | 4.5% |
| $100,000 to $149,999 | 17.0% | 26.1% | 11.3% |
| $150,000 to $199,999 | 14.2% | 12.8% | 13.0% |
| $200,000 to $299,999 | 2.5% | 30.1% | 20.1% |
| $300,000 to $399,999 | 0.3% | 14.0% | 13.6% |
| $400,000 to $499,999 | 0.4% | 4.5% | 8.3% |
| $500,000 to $749,999 | 0.0% | 1.2% | 9.7% |
| $750,000 to $999,999 | 0.0% | 0.8% | 3.9% |
| $1,000,000 to $1,499,999 | 0.0% | 0.2% | 2.2% |
| $1,500,000 to $1,999,999 | 0.0% | 0.0% | 0.8% |
| $2,000,000 and over | 0.0% | 0.9% | 1.1% |
| space3 | | | |
| Housing Units By Year Built | | | |
| | Harrisburg, IL | Gretna, LA | United States |
| 2015 and Newer | 0.0% | 0.0% | 0.2% |
| 2010 to 2014 | 9.4% | 4.6% | 13.6% |
| 2000 to 2009 | 9.4% | 4.6% | 13.6% |
| 1990 to 1999 | 8.1% | 6.6% | 13.6% |
| 1980 to 1989 | 7.5% | 6.5% | 13.2% |
| 1970 to 1979 | 9.3% | 13.8% | 14.8% |
| 1960 to 1969 | 8.1% | 6.6% | 13.6% |
| 1950 to 1959 | 11.0% | 21.3% | 10.0% |
| 1940 to 1949 | 13.8% | 8.7% | 4.7% |
| 1939 or Earlier | 23.5% | 14.5% | 12.2% |