SOLVED. Childrens/ YA fiction. A family with multiple children moves to a countryside cottage next to a mansion with a huge garden, I think the mom became a gardener for the people in the mansion. The kids befriend the boy that lives in the mansion. [s]

[Freda]

I thought it was called Meet the Pembertons or something but I haven't been able to find anything.

[Molly]

Sounds like the Penderwicks series!

The Penderwicks: A Summer Tale of Four Sisters, Two Rabbits, and a Very Interesting Boy

[Freda]

that’s it! thanks!

[Molly]

Yay! Glad to help.