Mason County offers building opportunities in Western Washington, though flood risk requires careful site selection.
📊64/100AcreScore
💰$9KLand $/acre
🏠$355KHome Value
👥66,740Population
📈+8.7%Growth (10yr)
🌊30%Flood RiskModerate
🌡️Marine West CoastClimateZone 8b
🏗️ Can You Build Here?
Mason County has local zoning regulations. Check with the county building department for specific rules on your parcel. Barndominiums may require conditional use permits in some zones.
Zone
Min Lot
Barndo OK?
Residential
Varies
⚠️ Conditional
Agricultural
None
✅ Yes
Commercial
Varies
❌ No
Mason County has local zoning. Contact the county building department for specific regulations.
📋 What Permits Do You Need?
Most states allow owner-builders to act as their own general contractor for personal residences. Check Washington 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
Mason County Building Department
Shelton, WA
Contact county clerk for current hours and requirements
🌊 What's the Flood & Soil Risk?
Elevated flood risk at 30%. Mason County has significant FEMA flood zone coverage — careful site selection and flood insurance may be required. Check FEMA maps for your specific parcel.
30%
In Flood Zone
Good
Soil Drainage
Good
Septic Viability
Source: FEMA National Flood Hazard Layer, USDA Web Soil Survey
💰 What Does It Cost?
Affordable land market. At roughly $9,000 per acre, Mason County offers good value for builders looking for rural acreage.
$9K
Median $/acre
$355K
Median Home Value
$120–200
Build Cost $/sqft
0.96%
Property Tax Rate
Source: U.S. Census Bureau ACS 2024, Mason County Assessor
🏔️ Why People Love Living Here
Mason County sits in the heart of Western Washington. Olympia is 25 min away. No state income tax means your dollar stretches further here than in most states.
🏗️
Affordable Land
Median land at $9,000/acre means you can buy more, build bigger, and still stay under budget.
🏠
Established Community
Zoning provides predictability — you know what your neighbors can and can't build. Good for long-term property value.
At a Glance
Population66,740
10-Year Growth+8.7%
County SeatShelton
State Income TaxNone
ClimateMarine West Coast (Zone 8b)
How Close Is Everything?
Olympia25 min
SEA100 min
Austinvaries
💧 Utilities & Infrastructure
Most rural Mason County land uses well water and septic systems. Municipal utilities are available near Shelton. Check with local utility providers for your specific parcel.
Electric ProviderLocal Co-op / TXU
WaterWell or Municipal
SewerSeptic (most rural)
InternetVaries by location
Cell CoverageGood
Natural GasPropane common in rural areas
🏦 Financing & Incentives
Mason County qualifies for USDA Rural Development loans — zero-down-payment financing for eligible buyers in most areas.
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❓ Frequently Asked Questions
Can I build a barndominium in Mason County?
Check with the Mason County Building Department for specific zoning rules on your parcel. Some zones allow barndominiums outright, others may require conditional use permits.
How much does land cost in Mason County?
Median price is approximately $9,000 per acre, though prices vary by location, road access, and improvements. USDA Rural Development loans may be available for eligible buyers.
Is Mason County eligible for USDA Rural Development loans?
Yes — most of Mason County qualifies for USDA Rural Development programs, including zero-down-payment home loans for eligible buyers.
What is the property tax rate in Mason County?
The effective property tax rate is approximately 0.96%. Check with the county assessor for the most current rates and any available homestead exemptions.
Do I need a licensed contractor to build in Mason County?
Most states allow owner-builders to act as their own general contractor for personal residences, though requirements vary by state and county. In Washington, check local building codes for specific licensing requirements. You'll typically need licensed professionals for electrical, plumbing, and HVAC work.