Commercial Real Estate Market in Swansea, IL
Updated monthly: sale, lease, property records, location trend, and more… · Last update: August 31
35 active listings and 267 off-market properties in Swansea, IL. Commercial property asks $153/SF to buy and $12.20/SF/Yr to lease.
Market Trends
Swansea, IL spans 103.4 square miles in St. Clair County, Illinois. Figures below refresh monthly; last updated 31 August 2026.
Office
Office vacancy in Swansea, IL runs 21.3% across the Midwest region in 2025, up from 13.7% in 2019.
Vacancy Rate % in Midwest region
Retail
Retail vacancy in Swansea, IL runs 6.3% across the Midwest region in 2025, down from 8% in 2020.
Vacancy Rate % in Midwest region
Industrial
Industrial vacancy in Swansea, IL runs 4.9% across the Midwest region in 2025, up from 4.4% in 2019. Nearly 1.6x the 2022 low of 3.1%.
Vacancy Rate % in Midwest region
Multifamily
Multifamily space in Swansea, IL asks $85/SF to buy. Vacancy runs 8% across the Midwest region in 2025, up from 6.5% in 2022.
Average Sale Price $/SF
Listings
Vacancy Rate % in Midwest region
Zoning & Land Use
Land Use Mix share of zoned land by category
- Residential 67.1%
- Commercial 31.3%
- Industrial 1.6%
Largest Zones share of zoned land by district
Single Family Residential
Planned Business
Single Family Residential
Highway Business
Single Family Residential
Swansea, IL zones 4,229 acres across 11 districts. Commercial zoning covers 31.3% of zoned land, residential 67.1% and industrial 1.6%. The largest single district is Single Family Residential at 27.2%. For commercial buyers the practical constraint is that only 32.9% of land carries a commercial or industrial designation.
Market overview
Demographics & Economy
Swansea, IL has 93,932 residents in 42,333 households. Density runs 908 people per square mile. Median household income here is $70,380 and median gross rent $1,007 a month.
93,932
Population
42,333
Households
2.2
Avg Household Size
40
Median Age
33%
College-Educated
95%
High-School Grad
103.4 sq mi
ZIP Area
908
Density / Sq Mi
$70,380
Median Household Income
$42,075
Median Earnings
$1,007
Median Rent
$169,690
Median Home Value
Tools
Nearby Markets
| Market | Average Sale Price, $/SF | Average Lease Price, $/SF/Yr |
|---|---|---|
| Belleville | — | — |
| Fairview Heights | — | — |
| Shiloh | — | — |
| Rentchler | — | — |
Commercial property in Swansea, IL asks $153/SF.
Frequently Asked Questions
What is the average price per square foot for commercial property in Swansea?
Commercial property in Swansea, IL asks an average of $153 per square foot. The 6 most recent recorded sales traded at a median of $139/SF, so asking sits 10% above the achieved median. Multifamily carries the highest asking price at $85/SF.
How much does it cost to lease commercial space in Swansea?
Asking lease rates in Swansea, IL average $12.20 per square foot per year.
What zoning applies to commercial property in Swansea?
Swansea, IL zones 4,229 acres across 11 districts, of which 31.3% is commercial and 1.6% industrial. The largest single district is Single Family Residential at 27.2% of zoned land. Residential zoning covers 67.1% and open space 0%.
Where does Realmo's Swansea market data come from?
Realmo compiles Swansea, IL figures from 7 recent recorded sales, 26 active sale listings, 9 active lease listings, 267 tracked off-market properties, the current Swansea zoning release. Sale and lease figures refresh monthly; vacancy annually. Last updated 31 August 2026.
Methodology & data sources
- Asking prices and averages
- Computed from 26 active for-sale and 9 active for-lease listings in Swansea, IL. These are ASKING figures from live listings, not closed-transaction prices, and a segment carried by a handful of listings reads as indicative rather than an average.
- Vacancy rates
- Published per-sector market series, taken at the metro level where one exists and otherwise at the Census-region level — a chart reading "in <region> region" is a regional number, not this city's.
- Zoning and land use
- The current municipal zoning release: 4,229 zoned acres across 11 districts. Shares are of zoned land, so parcels the release leaves unclassified are excluded from the mix.
- Refresh
- The monthly aggregates close at the end of the previous month, so 31 August 2026 — not today — is the honest last update.
- Known limitations
- office vacancy is reported at Midwest region level, retail vacancy is reported at Midwest region level and industrial vacancy is reported at Midwest region level.
- Coverage
- Metrics below the 10-observation threshold fall back one geographic level. The geography used is named on each figure.
Compiled by the Realmo Data team · reviewed 31 August 2026 · report a data issue
