Ada County, Idaho New Subdivisions

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The Ultimate Guide to New Subdivisions, New Homes and Building Lots

Ada County is a great place to live, work, and raise a family. Whether it’s the vibrant cultural and recreational opportunities available, the friendly people, or the mild climate, Ada County, ID and its communities (Boise, Eagle, Meridian, Kuna, and Star) afford a quality of life that is second to none. Good jobs, affordable housing, and nation-leading safety make the area a great place to call home! Ada County lies at the western end of the Snake River Plain, totaling 1,060 square miles. Ada County contains part of what is known as the Treasure Valley. At the base of the Boise foothills is the firtile and bustling valley that Boise Metro Area sits in. Residents will tell you that the Treasure Valley lives up to its name.

Ada County Home Values Report

Average Sales Price of New and Existing Homes in Ada County, Idaho since 2005
2020 Ada County Home Values Sales Price Report
Source: Intermountain MLS

View detailed analysis of Boise home values by area

ADA County Idaho MLS Areas

Established December 22, 1864, Ada County was named after Ada Riggs, who was the first pioneer child born in the area. Ada was the daughter of H. C. Riggs who was one of the founders of Boise and a member of the Idaho Territorial Legislature. Boise became the capital of Idaho in 1865.

Ada County land area: 1,060 square miles.
Population density: 327 people per square mile
The Snake River Birds of Prey Area is in the southeast corner of Ada County.