As recreational marijuana sales ramp up throughout California’s Bay Area, could the newly legal drug end up creating an unexpected type of high — in the real estate market? Researchers looking at the impact of legalized recreational marijuana on Denver’s home prices found a surprising trend: dispensaries that began selling recreational marijuana had a “large positive impact on neighboring property values.” After recreational sales became legal, houses close to a participating dispensary saw their value increase more than 8 percent relative to homes located slightly farther away, the study found.