Marina Del Rey's so-called Arts/Loft District may not have much in the way of art, but the neighborhood will be adding yet another low-rise residential building to the mix.  Plans were submitted to the city in early February for a 67-unit condo development at 4091 Redwood Avenue featuring 7,500 square feet of commercial space.  The new residential building would rise five stories, replacing one of the last remaining warehouse structures from prior to the neighborhood's mid-2000 development boom.  As is typical with most Westside multi-family projects, 4091 Redwood comes with copious parking accommodations.  The building would sit atop a 141-stall underground garage, containing spaces for both residents and the project's commercial tenant.  However, this section of Marina Del Rey also provides plenty of reasons to leave your car behind.  4091 Redwood would sit within easy walking distance of the recently upgraded Villa Marina Marketplace, a Costco, and a wide variety of stores along busy Washington Boulevard.  Other developers have also taken note, with a similar project proposed just one block to the east.