Yes. Old Westbury Gardens was featured in 2009 at "How I Met Your Mother" - As Fast as She Can (Season 4 Episode 23).
It was during the scene where Ted met a rich client who wanted him to design a murder house (a very expensive country house). The guy was kind of creepy and had an odd request for a laundry room that was 15 feet by 15 feet. He wanted stained-proof ceramic tile from floor to ceiling. Check out the synopsis on IMDb.
You can also watch "How I Met Your Mother" episodes, get episode information, recaps and more at TV.com.
Learn more about "How I Met Your Mother" by checking these legendary facts shared by Mentalfloss.com.