Behind the front that Oak Park shows the street there is a second village: back yards off the alley, coach houses, garden gates, small deep lots where the grass has to fit around a garage and a lilac. Oak Park Landscaping cuts and keeps those yards — cut, trimmed, edged, cleaned up in spring and again in fall — the private half of a property that only its people ever see. A back lawn kept well is what turns a lot into a room. The village's summer evenings happen out there, in the space between the garage door and the porch light. Making that space worth sitting in is the job.