Also you can use reventure website that shows you market data by zip code and counties.

What if the county (or city in my case) has a very low percentage for land compared to the total. 

You can still find deals in the outlying counties , you just have to be first and have cash .I am not a fan of Baltimore , my family moved out in 1974 , and I told my parents it was the BEST decision they ever made . 

Southern CA, LA county

A South Korean company that supplies Tesla is inching closer to a transformative project - codenamed "Project Motion Forward" south of Austin that could make the company Buda's largest private-sector employer.Futronic's potential project is part of the continued "Tesla effect," referring to how electric vehicle suppliers have flocked to the region in response to Tesla's mammoth presence in eastern Travis County where the Elon Musk-led company has a huge factory and headquarters.

The Biden administration recently approved the "sale" ($100/acre so more of a give-away/transfer) of 20 acres of BLM land near Las Vegas to Clark County to be used for affordable housing, so we'll see how that goes I guess.

The supply of homes for sale around the three county area of Sacramento has risen for the 8th month in a row.

I am looking at my first real estate investment in the Clearwater Florida area 33756 zip code in Pinellas County.

Not Seattle, but Kitsap County...I have a property there that could be marketed to travel nurses and TDY shipyard workers. 

A flip or new build needs county records of each trades permits.