If you are looking to build a custom home, you will find Arroyo Grande Land, acres, and several Lots for sale in all price ranges.
Most of Arroyo Grande Land / Acres can be found East of the 101 Freeway and on the Mesa. You can find smaller residential lots just about everywhere, including Developments like: The Highlands, Rancho Grande, and Cypress Ridge. There are also several lots closer to the water on the West side of the 101.
If it is too soon to build, there are several Arroyo Grande Homes for sale in all price ranges as well.