A recent site visit has discovered that foundation work is underway at a three-story, seven-unit development at 3836 Haverford Avenue in Mantua, West Philadelphia, though construction permits had been issued several months ago. The project, situated on the south side of the block between North 38th and North 39th streets, replaces a vacant lot nestled next to a prewar rowhouse. Designed by Haverford Square Designs, the development will span 4,800 square feet and will feature a private roof deck for one of the units. Permits list Haverford Sq GC LLC as the contractor and specify a construction cost of $400,000.