Commercial Real Estate Market in Union, ME
Updated monthly: sale, lease, property records, location trend, and more… · Last update: August 31
10 active listings and 64 off-market properties in Union, ME.
Market Trends
Union, ME spans 64.9 square miles in Knox County, Maine. Figures below refresh monthly; last updated 31 August 2026.
Office
Office space in Union, ME asks $174/SF to buy. Vacancy runs 19.9% across the Northeast region in 2025, up from 13.1% in 2019.
Average Sale Price $/SF
Listings
Vacancy Rate % in Northeast region
Retail
Retail space in Union, ME asks $160/SF to buy. Vacancy runs 6% across the Northeast region in 2025, little changed from 6% in 2019. Down from a 2020 peak of 7.1%.
Average Sale Price $/SF
Listings
Vacancy Rate % in Northeast region
Industrial
Industrial vacancy in Union, ME runs 7.6% across the Northeast region in 2025, up from 5.4% in 2019. Nearly 2.4x the 2021 low of 3.2%.
Vacancy Rate % in Northeast region
Multifamily
Multifamily vacancy in Union, ME runs 5.6% across the Northeast region in 2025, up from 4% in 2022.
Vacancy Rate % in Northeast region
Zoning & Land Use
Land Use Mix share of zoned land by category
- Agricultural 79.9%
- Commercial 1.8%
- Industrial 0.6%
Largest Zones share of zoned land by district
Rural Area
High Elevation
Village Residential
Commercial And Residential
Industrial
Rural Area (RA)
The intent of this district is to protect and preserve the rural character of the Town, while providing for flexibility and innovative use of the land in accordance with standards of development that do not unduly compromise the rural character of the district
Market overview
Demographics & Economy
Union, ME has 3,794 residents in 2,065 households. Density runs 58 people per square mile. Median household income here is $71,546 and median gross rent $1,067 a month.
3,794
Population
2,065
Households
1.8
Avg Household Size
47
Median Age
34%
College-Educated
97%
High-School Grad
64.9 sq mi
ZIP Area
58
Density / Sq Mi
$71,546
Median Household Income
$38,164
Median Earnings
$1,067
Median Rent
$236,700
Median Home Value
Tools
Nearby Markets
| Market | Average Sale Price, $/SF | Average Lease Price, $/SF/Yr |
|---|---|---|
| Appleton | — | — |
| Washington | — | — |
| Warren | — | — |
| Hope | — | — |
Commercial property in Union, ME asks $319/SF.
Frequently Asked Questions
What is the average price per square foot for commercial property in Union?
Commercial property in Union, ME asks an average of $319 per square foot. Office carries the highest asking price at $174/SF.
Where does Realmo's Union market data come from?
Realmo compiles Union, ME figures from 10 active sale listings, 64 tracked off-market properties, the current Union zoning release. Sale and lease figures refresh monthly; vacancy annually. Last updated 31 August 2026.
Methodology & data sources
- Asking prices and averages
- Computed from 10 active for-sale and 0 active for-lease listings in Union, ME. 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: 22,088 zoned acres across 6 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 Northeast region level, retail vacancy is reported at Northeast region level and industrial vacancy is reported at Northeast 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
