Scott Engler’s proposal to build 11 cottages on a vacant lot at Thomas and 24th Ave. E is “still in the massage phase.â€� The Miller Greens development needs to get the city’s approval to rezone the land from single-family, which would only accommodate four homes, to L1, and intermediate classification that allows a buffer of moderate density. Engler submitted his application on Dec. 4 and is negotiating with the city over the last remaining sticking point, a community building on the lot that exceeds height limits. Engler says neither he nor the city want to give up the building, which would be open to the entire neighborhood. Once the city accepts his application, the approval process could take six months or more, and construction will consume another year. Engler, who has been a builder in Seattle for forty-plus years, says his dream is to “to build the most sustainable project Seattle has seen and make it marketable.â€� Here are some specs: At 1,100 square feet, the concrete and glass homes would have: 1.5 baths (with storm-water flushed toilets), green roofs and stained concrete floors with radiant heat. The single-story buildings will face a central courtyard, increasing, Engler says, the chances of accidental encounters among neighbors. An underground parking garaged will provide one and half times as much parking as the city requires — but some neighbors are still in a huff over that. The units will sell for $600,000-plus.