The Alias actress' budding bump was clearly on show as she surveyed the site in Brentwood, California, which they are rumoured to be moving into upon completion.
Getting ready for baby: Jennifer Garner showed off her bump as she checked up on the construction of her new home in California yesterday
Jennifer, who already has a 2-year-old daughter Violet with Affleck, is believed to be more than five months pregnant.
Affleck's firm friend Kevin Smith, who also starred alongside Garner in Catch and Release, said the Hollywood pair make ideal parents.
He told People magazine: 'Jen is such a Martha Stewart type. She is a perfect mum.'
Baby Bennifer: The couple are preparing for the arrival of their second child
And Ben is a great dad, which I found not that surprising, but it's a side of him that I never thought about before he became a dad.
'He's a great father. He loves that kid of his.'
Of juggling motherhood with her career, Garner says: 'My job is great to have as a mom. I get to take breaks and then work in a really concentrated way. During that concentrated time, it sucks, but whatever.'
Garner and Affleck started dating in July 2004 after splitting from Alias co-star Michael Vartan and Jennifer Lopez respectively.
New home? The pair are rumoured to be moving into this house in Brentwood
