. >> reporter: 40-year-old ian walsh and young family moved out to ashburn three years ago and walsh does not regret the choice despite his hour commute to downtown dc. >> when i get out here, especially into the neighborhood, i kind of feel sort of the stress of the city roll off my shoulders a little bit. and i can just sort of relax, kind of instantly. >> reporter: walsh may like the quiet of ashburn, but the price to buy between city and suburb is growing because of demand from two very large generations on either side of him. millennials and active baby boomers. they want the walkability and sociability of urban cores like bethesda. >> it's increasingly attractive to have walkability to everything down here in bethesda. that's what people pay for. >> reporter: for now, sky's the limit in downtown prices but as millennials age, the suburbs could see a rebirth. with the price divide so great now, those far out homes could see bigger price growth down the road. of course, it all depends on supply as always. right now, focusing on the a-level lots. and then not so much. if you start

. >> reporter: 40-year-old ian walsh and his young family moved to ashburn three years ago and walsh't regret the choice, despite his hour commute to downtown d.c. >> when i get out here, especially into the neighborhood, i kind of feel sort of the stress of the city roll off my shoulders a little bit and i can just sort of relax instantly. >> reporter: walsh may like the quiet of ash burn but the price device between city and suburb is growing because of demand from two very large generations on either side of him -- millennials and active baby boomers. they want the walkability and socialability of urban cores like bethesda. >> rockability is very important to downtown, to metro, everything that's down here in bethesda. that's what people are paying for. >> reporter: for now, at least, the sky is the limit but as millennials age the suburbs could see a rebirth, so with the price divide so far out now, those price divides could see bigger growth down the road. of course, it all depends on supply. right now builders are focusing on closer in markets, the so-called a level lots. if we

. >> reporter: 40-year-old ian walsh and his young family moved out to ashburn three years ago, and walsh does not regret the choice, despite his hour commute to downtown d.c. >> when i get out here, especially i get into the neighborhood, i kind of feel sort of the stress of the city roll off my shoulders little bit, and i can just sort of relax kind of instantly. >> reporter: walsh may like the quiet of ashburn, but the price to buy between city and suburb is growing because of demand from two very large generations on either side of him, millennials and active baby boomers. they want the walkability and socialability of urban areas like bethesda. >> it's becoming more popular to have walkability to downtown areas, to restaurants, to metro everything that's down here in bethesda. that's exactly what people are paying for. >> reporter: for now, at least, the sky is the limit in downtown prices, but as millennials age, the suburbs could see a rebirth. so, with the price divide so great now, those far-out homes could see bigger price growth down the road. for "nightly business report," i'm