Window Installation & Replacement in Philadelphia, PA

Properties listed on the Philadelphia Register of Historic Places or located inside a designated historic district require PHC review for window replacement. Major districts include Society Hill, Old City, Queen Village, Germantown, parts of West Mount Airy, Chestnut Hill, Fairmount, Spruce Hill, and many others. Individual properties scattered across other neighborhoods are also on the Register. We verify status at the on-site visit and consult with PHC staff before quoting if there is any uncertainty.

Staff approves roughly 95 percent of applications within five days, often by email. The remaining 5 percent — typically major rehabilitation projects or proposals that staff cannot approve directly — route to the Architectural Committee and full Commission for public hearings, which adds several weeks to the timeline. For straightforward window replacement with proper documentation, plan on one to two weeks for PHC clearance plus standard L&I permit issuance.

Yes, when specified correctly. PHC reviews material, profile, color, sash proportion, meeting rail position, and grid layout — the goal is preserving the historic character of the facade. A properly specified OKNA vinyl unit in the right configuration meets the review standard. We prepare the full submission package — photographs labeled with address and date, drawings, OKNA product data, and grid specifications — for staff review through eCLIPSE.

EZ Permit insert replacement runs $525 to $925 per window with double-pane Low-E. Full-frame replacement with sill repair runs $800 to $1,400 per window in pre-1900 rowhouses and Federal-era homes. PHC documentation is built into project planning for historic district work. Custom shapes for Victorian bays and specialty openings run $1,300 to $3,000 each. Full-home replacement falls in the $7,500 to $26,000 range, depending on neighborhood, era, and permit track. For detailed neighborhood-by-neighborhood pricing, see our Philadelphia window replacement cost guide.

Yes. Rowhouse third-floor windows and attic dormers — common in South Philly, Fishtown, and Northeast Philadelphia — require staging, ladder access, and additional labor compared to ground-floor or second-floor work. The third-floor and dormer surcharge typically runs $100 to $250 per opening. We document the per-floor pricing transparently in the written quote rather than burying it in a single per-window number.