Whether they decide to move from their current homes or age in place, the decisions baby boomers and other older homeowners make during the next few years could significantly impact the single-family housing market. Today, baby boomers and other homeowners age 55 and older control almost two-third (or about $8 trillion) of the nation’s home equity. There also are more than 67 million 55-plus homeowners.

The new “Freddie Mac 55+ Survey”—which polled 4,900 homeowners born before 1961 regarding their current housing situations, plans and willingness to help their grown children become homeowners —found that this generation has the potential to generate significant new demand for mortgage credit and to tighten home-buying competition, especially for millennials and other first-time home buyers.

Here are some of the survey’s key findings:

• Consistent majorities said they are “very satisfied” with their current homes (64 percent), their communities (59 percent) and quality of life (54 percent). Nearly 90 percent of the respondents said people their age should own a home.

• Seventy-six percent of homeowners were confident they would have a comfortable retirement. These feelings were echoed across racial lines and shared by 55-plus homeowners who are still working, as well as retirees, and the 44 percent of homeowners surveyed had a mortgage.

• Consistent majorities said homeownership makes financial sense for married people with children (96 percent) and without children (85 percent), as well as single people with children (79 percent) and without children (53 percent). Almost 25 percent of the respondents also said they have offered down payment assistance to someone.

• This works out to an estimated 42 million homeowners who don’t plan to move. About a quarter (23 percent) indicated they would need major renovations to keep their homes accessible and a third (34 percent) would pay for improvements by refinancing their mortgage or taking out a second loan or home equity line of credit.

• Although movers were in the minority, it was a big minority. According to the survey, almost 40 percent of all 55-plus homeowners said they would like to move at least once more if they had complete control over it. This isn’t just about downsizing to a rental or nursing home; 19 million planned to buy a home and nearly 8 million expected to move within the next four years. Half of the 19 million likely movers also expected to buy less expensive homes.