Philadelphia outdoor projects vary widely by neighborhood character. A rear courtyard garden for a Chestnut Hill or Mt. Airy property typically runs $12,000 to $28,000 depending on hardscape, planting, and lighting scope. NE Philadelphia row home backyard and side yard transformations run $6,000 to $14,000. Pool construction for a Northwest Philadelphia estate property ranges from $75,000 to $165,000 including surrounding hardscape and equipment. Philadelphia L&I permit fees and processing time are a real cost factor: pool permits, deck permits, and structural fence permits all require L&I review, and properties in historic districts require additional Historical Commission review that can add six to twelve weeks. Your free consultation includes a site assessment and a permit-pathway overview specific to your block and zoning district.