A couple of questions.
How large is the crawl space with regards to square footage?
How deep is the crawl space?
What kind of access is there to the crawl space?
What are the building requirements for footing depth in your area?
What kind of sub-surface material is present on the lot? Sand, Gravel, Clay, Rock, Dirt, Etc.?
In my area of Michigan footings are required to extend below the frost line which is 48" for standard construction. So most homes (90%+) have a basement with a few generally on the lower end of the scale having either a crawl or slab foundation, either way the footings are still 48" deep. About the only time you see a crawl or slab on higher end construction are homes that are situated on a site with a high water table.
The reason I ask the information about the crawl space is it may have more value them some think if it is usable and accessible. About 20 years ago my brother built a home in West Virginia where most of the sub-surface is rock. The site had a slope to it so plans called for part of the house to sit on a slab and part on a crawl. The contractor suggested that they reposition the proposed location of the house by about 10' and showed them how they could have an approximately 1,000 SF, 6' deep, concrete floor crawl space with an exterior entrance. He also suggested they install a set of double doors so it would be easier to store tables, chairs, bikes, lawnmowers, etc. in this space.
About 25 years ago I was appraising a new construction located on an inland lake lot. The owner's daughter was an architect and had everything planned out to the nth degree including the placement of furniture. Because of the high water table it was not possible to install a basement so she planned for a usable crawl space. There was a set of stairs located in a closet area. A cement floor was installed, lights were installed, along with a custom made workbench and storage cabinets. After walking down the stairs you sat down on a mechanics creeper and wheeled your way around. I think about that feature every time I am in that area.