Union County in Northeast — urban density and development pressure lower the buildability score, but opportunities exist in outlying areas.
📊45/100AcreScore
💰$1KLand $/acre
🏠$90KHome Value
👥3,971Population
📈+-11%Growth (10yr)
🌊6%Flood RiskLow
🌡️High PlainsClimateZone 5b
🏗️ Can You Build Here?
New Mexico has no state building code — regulations are county-level. Union County has no formal zoning ordinance, meaning most rural land can be used for residential construction including barndominiums without special permits beyond standard building codes.
Zone
Min Lot
Barndo OK?
Unzoned
None
✅ Yes
Union County has no formal zoning ordinance. Standard building permits still required. Contact the county building department for specifics.
📋 What Permits Do You Need?
Most states allow owner-builders to act as their own general contractor for personal residences. Check New Mexico requirements — licensed subs are typically needed for electrical, plumbing, and HVAC.
Required Permits
• Building permit (residential)
• Septic permit (if no public sewer)
• Electrical permit
• Plumbing permit
Permit Office
Union County Building Department
Clayton, NM
Contact county clerk for current hours and requirements
🌊 What's the Flood & Soil Risk?
Moderate flood risk. 6% of county land is in FEMA flood zones. Most buildable parcels are outside hazard areas, but always verify your specific site.
6%
In Flood Zone
Good
Soil Drainage
Good
Septic Viability
Source: FEMA National Flood Hazard Layer, USDA Web Soil Survey
💰 What Does It Cost?
Extremely affordable. Median land prices around $500 per acre make Union County one of the most budget-friendly options in New Mexico.
$1K
Median $/acre
$90K
Median Home Value
$120–200
Build Cost $/sqft
0.0069%
Property Tax Rate
Source: U.S. Census Bureau ACS 2024, Union County Assessor
🏔️ Why People Love Living Here
Union County sits in the heart of Northeast. Clayton is 0 min away. New Mexico has a state income tax — factor that into your cost-of-living calculations.
🏗️
Affordable Land
Median land at $500/acre means you can buy more, build bigger, and still stay under budget.
🔨
Build Freedom
No formal zoning means you can build your barndominium, shop, or homestead without jumping through bureaucratic hoops.
At a Glance
Population3,971
10-Year Growth-11%
County SeatClayton
State Income TaxYes
ClimateHigh Plains (Zone 5b)
How Close Is Everything?
Clayton0 min
Clayton Municipal Airport5 min
Austinvaries
💧 Utilities & Infrastructure
Most rural Union County land uses well water and septic systems. Municipal utilities are available near Clayton. Check with local utility providers for your specific parcel.
Electric ProviderLocal Co-op / TXU
WaterWell or Municipal
SewerSeptic (most rural)
InternetVaries by location
Cell CoverageVariable
Natural GasPropane common in rural areas
🏦 Financing & Incentives
Union County qualifies for USDA Rural Development loans — zero-down-payment financing for eligible buyers in most areas.
New listings, zoning changes, and builder availability — delivered to your inbox.
❓ Frequently Asked Questions
Can I build a barndominium in Union County?
Yes. Union County has no formal zoning ordinance. You'll still need standard building permits, but barndominiums are generally permitted on rural land. Check with the county building department for specific requirements.
How much does land cost in Union County?
Median price is approximately $500 per acre, though prices vary by location, road access, and improvements. USDA Rural Development loans may be available for eligible buyers.
Is Union County eligible for USDA Rural Development loans?
Yes — most of Union County qualifies for USDA Rural Development programs, including zero-down-payment home loans for eligible buyers.
What is the property tax rate in Union County?
The effective property tax rate is approximately 0.0069%. Check with the county assessor for the most current rates and any available homestead exemptions.
Do I need a licensed contractor to build in Union County?
Most states allow owner-builders to act as their own general contractor for personal residences, though requirements vary by state and county. In New Mexico, check local building codes for specific licensing requirements. You'll typically need licensed professionals for electrical, plumbing, and HVAC work.