Etnier purchased land in
South Harpswell, Maine in 1948 to build "Old Cove", his dream house and studio. Designed in collaboration with Portland, Maine architect James Saunders, the home featured a porch cantilevered over the ocean, north-facing windows for his studio, and a living room overlooking the ocean and framed by
Mondrian-inspired window frames. Named for the private cove it overlooked, the home served as the foundation for a productive and increasingly serene period in Etnier's career. Old Cove was sold to new owners in 2014 and subsequently demolished. The 1950s and 1960s mark a maturing, accomplished style in Etnier's work. Although still traveling south most winters in his boat, his life took a more domestic turn as he re-adopted Maine as his permanent home and married his fourth wife, Samuella "Brownie" Brown Rose. They were married for thirty-three years and had two sons. During those years, he painted daily, exhibited widely and enjoyed popular support, artistic awards and media attention. Etnier's work became more architectural, marked by stark geometry, light and shadow, impressionistic figures and accents of color and modern culture. He adopted an artist's discipline of rising early and painting each morning (learned first from Rockwell Kent), seeking to capture the essence of Maine waterfronts and landscapes and the effects of light. The study of sunlight and water fascinated Etnier until the end of his career. On November 7, 1984, Stephen Etnier died at Old Cove, comforted by his two sons. File:Etnier Still Morning.jpg|
Still Morning, 1960 File:Etnier Fort Popham.jpg|
Fort Popham, 1981 File:Etnier Storefront Nassau.jpg|
Storefront, Nassau, 1957 File:Study for Hurricane Ridge.jpg|
Study for Hurricane Ridge, Harpswell, ca. 1970 ==Exhibitions and awards==