Another data point about the all-important American housing market.

Zillow, the real estate guesstimate people, are out with some new research that shows homes within a mile of a Trader Joe’s or a Whole Foods are worth twice as much as the median home in the rest of the country.

If you own a home and a Trader Joe’s opens nearby, look for a 10 percent bump the first two years its open.

Of course, there’s a whole lot of other things that go into the value of a home near a Trader Joe’s or a Whole Foods — do I need to lay that out? No.