Austin, Texas-based ICON, which builds affordable homes using 3D-printing technology, robotics and advanced materials, announced it has raised $9 million in seed-stage funding. Oakhouse Partners led the large seed funding, which also included national homebuilder D.R. Horton; Emaar, a large Middle East developer; Texas startup accelerator Capital Factory; CAZ Investments; Cielo Property Group; Engage Ventures; MicroVentures; Saturn Five; Shadow Ventures; Trust Ventures; Verbena Road Holdings; and Vulcan Capital, the multi-billion dollar investment arm of the late Microsoft co-founder and philanthropist Paul Allen. Jason Portnoy, managing partner at Oakhouse Partners and a Kauffman Fellows classmate of ICON co-founder Evan Loomis, wrote a Medium post about why he invested.