Apex Construction, a Portland, Ore. company that sells environmentally friendly building materials to construction developers to help them meet the U.S. Green Building Council’s standards, expects to close a third round of funding amounting to between $8 million and $10 million, according to VentureWire. Basically, it already has the $8 million on hand, left over from a tranche in November, and is looking to bring in $2 million more by the end of March.

While the company has expressed interest in scaling through the acquisition of a smaller player in the green building space, it hasn’t released any specific plans. For the time being, it offers a lightweight concrete block made from recycled material and has mentioned using it in potential building projects in developing countries.

Apex last raised funds in April 2008, bringing in $25 million. It also snagged $8.3 million in first-round funding back in 2003. The only listed investor in the company is construction firm Compagnie de Saint-Gobain.