Seneca: Housing & Real Estate
Housing in Seneca centers on a median value of $227,500 (estimated market value runs 7% higher at $243,582), with median rent $1,149 (1.2× higher than LaSalle County median $928; 1.1× below Illinois median $1,274). Homeownership rate: 81.3%. That's 1.4× higher than the LaSalle County median ($161,900); 1.2× below the Illinois median ($263,300). Market is warm. Vacancy rate 4.5%. New construction makes up 3.9% of stock. A municipal building code is in effect.
- 2.6× annual income — home value vs. household income (vs Illinois 4.0×).
- 16.5 years to break even renting at the median (vs Illinois 18y).
- 4-BR rent is 2.1× a studio — rent gradient by unit size.
- Median rent 21% below HUD 2-BR FMR — local market vs federal subsidy benchmark.
Home Values & Rent
Median home value $227,500 — 0.7× the Illinois median ($314,700). Median rent $1,149/month. homeownership rate 81.3% — above the U.S. share of ~65%.
| Affordability · Home Price To Income | 2.6× |
|---|---|
| Affordability · Home Affordability | affordable |
| Affordability · Rent Pct Income | 13.7% |
| Affordability · Rent Affordability | affordable |
| Affordability · Pct Severely Rent Burdened | 14.3% |
| Affordability · Poverty Rate | 22.2% |
| Affordability · Property Tax Pct Income | 4.2% |
| Fair Market Rent · Studio rent | $1,032 (vs Illinois $1,480) |
| Fair Market Rent · One-bedroom rent | $1,118 (vs Illinois $1,581) |
| Fair Market Rent · Two-bedroom rent | $1,459 (vs Illinois $1,781) |
| Fair Market Rent · Three-bedroom rent | $1,979 (vs Illinois $2,294) |
| Fair Market Rent · Four-bedroom rent | $2,203 (vs Illinois $2,653) |
| Fair Market Rent · HUD FMR area | Grundy County, IL HUD Metro FMR Area |
| Fair Market Rent · Fiscal year | FY2026 |
| Home Value Estimate | $243,582 |
| Median Home Value | $227,500 (vs Illinois $314,700) |
| Median Rent | $1,149 (vs Illinois $1,440) |
Sources: HUD FMR FY2026 · Census ACS 5-Year 2023, B25077 · Census ACS 5-Year 2023 · Refreshed 2026-04-12
Tenure & Occupancy
Owner-occupied vs renter-occupied housing units, plus vacancy rates.
| Housing Market · Market temperature | warm |
|---|---|
| Housing Market · Vacancy rate | 4.5% |
| Housing Market · New construction (% of stock) | 3.9% |
| Housing Market · Price Appreciation 2Yr | 10.2% |
Utilities
Electricity, water, and broadband infrastructure serving residents. Broadband percentages reflect the share of premises that can subscribe to service at the listed speed (FCC Form 477).
Facilities (2)
Systems (1)
| Broadband · % of premises with 25/3 Mbps broadband | 100.0% (at Illinois median) |
|---|---|
| Broadband · % of premises with 100/20 Mbps broadband | 100.0% (at Illinois median) |
| Broadband · % of premises with 250/25 Mbps broadband | 100.0% (at Illinois median) |
| Broadband · % of premises with 1 Gbps / 100 Mbps broadband | 3.4% (vs Illinois 76.8%) |
| Broadband · Broadband-capable premises | 1,164 |
| Electricity · Electricity rate (¢/kWh) | 15.87¢/kWh |
| Electricity · Customers | 5392477 |
| Electricity · Revenue Millions | $7,118 |
| Electricity · Year | 2024 |
| Mobile Broadband · 3G mobile coverage | 0.000000000 |
| Mobile Broadband · 4G mobile coverage | 1.000000000 (at Illinois median) |
| Mobile Broadband · 5G mobile coverage | 0.957317073 (vs Illinois 100.0%) |
Sources: FCC BDC Jun 2025 · EIA Annual Retail Sales 2023 · FCC BDC Mobile 2024 · Refreshed 2026-04-12
Other
| Homeownership Rate | 81.3% (vs Illinois 66.4%) |
|---|---|
| Median Year Built | 1976 |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12