Derek Jeter's custom home is taking shape on Davis Islands. Designed with a whopping 30,875 square feet of space, the seven-bedroom, nine-bathroom waterfront home dwarfs nearby mansions and could end up the largest home in Hillsborough County. It's roughly the size of a Best Buy electronics store and twice the size of the previous No. 1 house, just across Hillsborough Bay on Bayshore Boulevard, owned by Lazydays RV SuperCenter founder Don Wallace. Kered Connors LLC, which lists Jeter as the "sole member," purchased adjacent waterfront lots on Davis Islands' Bahama Circle in 2005 and 2006. ("Kered" spells "Derek" backward.) Kered Connors paid $7.7 million for the properties at Bahama Circle and Baffin Avenue.