Portland Property Intelligence

Cascadia Subduction Zone seismic risk

Portland faces a magnitude 9.0+ earthquake threat from the Cascadia Subduction Zone. CaveatBuyer maps properties against DOGAMI's seismic hazard layers including liquefaction, landslide, and amplification zones.

Measure 50 tax compression

Oregon's unique property tax system means assessed value (AV) often diverges significantly from real market value (RMV). CaveatBuyer identifies properties where tax compression creates reassessment exposure after a sale.

SB 762 wildfire risk

Oregon's Senate Bill 762 wildfire mapping program identifies properties in high-risk wildfire zones, which can trigger insurance requirements and building code upgrades. CaveatBuyer checks every property against these designations.

DEQ contamination sites

Oregon DEQ tracks brownfields, leaking underground storage tanks, and environmental cleanup sites. CaveatBuyer calculates proximity and risk exposure for every property.

Radon

Parts of the Portland metro area are in EPA Zone 1 (highest radon potential). CaveatBuyer flags radon zone status for every property based on county-level EPA mapping.

What should I check before buying a house in Portland?

Before buying in Portland, check for Cascadia seismic zone exposure, FEMA flood zones, SB 762 wildfire risk designation, DEQ contamination proximity, Measure 50 tax compression (assessed vs. real market value gap), radon zone status, and building era risks. CaveatBuyer's free Foundation Report covers all of these. The $49 Intelligence Report adds proprietary analysis including Insurance Difficulty Score and Flip Detection.

How do I check earthquake risk for a Portland property?

CaveatBuyer maps every Portland-area property against DOGAMI (Oregon Department of Geology and Mineral Industries) seismic hazard layers, including liquefaction susceptibility, landslide hazard, and ground amplification zones. Portland faces a major earthquake threat from the Cascadia Subduction Zone. Enter any address at caveatbuyer.com for a free risk assessment.

What is Measure 50 and how does it affect Portland home purchases?

Oregon Measure 50 caps assessed property value growth at 3% per year, which means the assessed value (AV) can diverge significantly from real market value (RMV) over time. When a property sells, the new assessment may jump closer to market value, causing a tax increase. CaveatBuyer identifies properties where this compression gap is significant and estimates potential tax reassessment exposure.

What are common issues with older homes in Portland?

Pre-1940 Portland homes often have knob-and-tube wiring, cast iron drain pipes, lead paint, and unreinforced masonry (a significant seismic vulnerability). Homes from the 1940s-1960s commonly have asbestos insulation and galvanized steel pipes. Portland's wet climate accelerates deterioration of these aging systems. Oregon's 12-year statute of repose (ORS 12.135) limits construction defect claims, making pre-purchase due diligence especially important.

How much does a CaveatBuyer report cost in Portland?

CaveatBuyer's Foundation Report is free for any Portland-area address. The full Intelligence Report costs $49 and adds proprietary analysis. No subscription required.