Barbara Butler has spent nearly four decades building tree houses all across the country. But when the Hayward-based timber expert spoke to SFGATE on Tuesday, she started the call with bewilderment.

US real estate company Zillow asks its readers every year to have their say on the 'house of the year' and for 2017, this stunning five-story treehouse took the top place. With nearly 2,500 votes, the ...

Whether you bought a new home or are taking on chores for a relative, suddenly you are expected to tend intimidating rose ...

Volcanic rock at the Sáttítla Highlands National Monument filters rain and snowmelt into an underground aquifer network that holds as much as 200 of California's biggest reservoirs.