Emerald Valley Estates
- Offering building lots. Includes development map, information about amenities, and photographs.
- http://www.emeraldvalleyestates.com/

Geno's Keystone Real Estate
- Residential and commercial property, farms, land, and acreages offered for sale for over thirty years from offices in Elkader, Monona, and Waukon. Includes listings and a contact form.
- http://www.genoskeystonerealestate.com/

Voss Realty
- Real estate homes and property listings in Clayton County, Iowa. Relocation information and contact numbers.
- http://www.vossrealty.com/