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How to Choose the Right Lot for Your Custom Home in Oregon
Buying a lot in Oregon isn’t the same as buying a lot anywhere else. The state’s land use planning system — built around Urban Growth Boundaries, statewide planning goals, and Exclusive Farm Use zoning — creates a layer of complexity that catches out-of-state buyers and first-time builders regularly.
The Urban Growth Boundary: The First Check on Every Oregon Lot
Oregon requires every city and county to establish an Urban Growth Boundary (UGB). Land inside the UGB has access to city water and sewer. Land outside typically requires well and septic.
A lot outside the Salem UGB that appears affordable might require:
- A DEQ-approved septic system: $15,000–$50,000+
- A well: $10,000–$30,000+
- Extended utility runs at variable cost
These costs need to be in your budget before you make an offer, not after.
Exclusive Farm Use Zoning: The Lot That Isn’t Buildable
EFU (Exclusive Farm Use) zoning limits land use to agricultural activities. Minimum lot sizes in EFU zones are often 80 acres. Residential construction on EFU land typically requires a non-farm dwelling exception through the county — a process that can take 6–18 months and may not result in approval.
Check the county GIS zoning map before making an offer on any rural lot.
Site-Specific Checks That Change Your Budget
Soils and geotechnical conditions
Willamette Valley silty clay soils affect foundation design and cost. Near Bend, volcanic pumice profiles are common. A geotechnical evaluation ($2,000–$5,000) before purchase gives you the foundation parameters needed to accurately price the build.
Topography and drainage
Lots with significant slopes or drainage concentration points require more expensive site preparation. These costs aren’t reflected in the land price.
Wetlands and waterway setbacks
Oregon’s waterway setbacks (typically 50–200 feet from streams and wetland boundaries) can remove meaningful portions of a lot from buildable area. A wetland delineation ($1,500–$4,000) confirms the actual buildable area.
Utility access
Confirm whether water, sewer, gas, and power are at the lot line or whether extension costs apply.
Deschutes County: Additional Checks for Bend-Area Lots
WUI designation. Large portions of Deschutes County are in Oregon’s designated wildfire risk areas. WUI requirements affect material selection and add cost — they need to be known before the design phase, not after.
Setbacks and lot coverage. Deschutes County setback requirements and coverage limits vary by zone. Confirm the net buildable envelope with a county planning inquiry.
System Development Charges. Within Bend city limits, SDCs can total $20,000–$50,000+ per new home, payable before permits are issued. Request an SDC estimate from the City of Bend Building Division when evaluating any lot inside city limits.
The Contingency in the Purchase Contract
Include a soils and feasibility contingency in your purchase offer — typically 30–60 days to complete a geotechnical evaluation, confirm zoning, verify utility access, and obtain a septic site evaluation. A reputable land seller in Oregon will expect this.
How Your Contractor Fits Into Lot Selection
The most efficient lot selection process involves your contractor before you’ve made an offer. A contractor who builds in your market knows the soil conditions and lot configurations that add cost.
Integra Built has been building in the Willamette Valley and Central Oregon since 2010. We evaluate sites as part of our pre-construction process and flag conditions that affect budget and timeline. Oregon CCB #234-156.