Ellis Cottage, erected 1865, is made of local uncut stone. The cottage is a typical farmers residence of the 1870's. The stone construction is unique in this district as most construction is weatherboard. Ellis Cottage is historically significant for its association with the Ellis family, who were pioneers of the Diamond Creek district and the benefactors of the notable Nillumbik Cemetery gateway. It illustrates the development of farming in the area. Ellis Cottage is historically and technically significant for its rare use of uncut local stone for building purposes. The cottage and grounds houses the Nillumbik Historical Society’s collection of historic photographs and documents of pioneering families from the area.