Exterior French Door Installation and Replacement Cost
Here, “French door” means an exterior hinged, glazed double-door system, not an interior pair of doors. The system may have an active leaf, an inactive leaf, a sill or threshold, multipoint or conventional hardware, weatherstripping, frame, glass, and trim. Existing-opening replacement and a new or widened opening are different projects.
Define the system
Ask whether the quote includes both leaves, frame, hinges, lock and strike, threshold, screens, glazing, trim, flashing, and interior and exterior finish. Confirm the handing, active leaf, swing, clear opening, and whether the existing opening is wide enough. A conversion from a single opening to a double opening may require framing, cladding, utility, permit, and finish work.
Building America treats the door sill or pan, jamb and head flashing, weather seal, and wall drainage connection as one water-management scope. The threshold is not just a transition strip; it is part of keeping wind-driven rain and water out of the opening.
Cost signals and drivers
Mullions reports a Canadian installed example of roughly CAD 2,800–6,000 for a double French door in an existing opening. That is a specialist planning signal with stated scope assumptions, not a national Canadian range and not evidence for U.S. pricing. Product size, glass, frame, material, hardware, opening condition, finish, and access can move the actual quote outside it.
Main drivers include:
- custom size and two-leaf alignment;
- glass, coatings, safety or impact specifications;
- frame, sill, threshold, weatherstripping, and hardware;
- flashing, air sealing, cladding, trim, drywall, flooring, and paint;
- removal, disposal, access, and older-home disturbance;
- opening modification, structural review, or local approvals.
French doors versus sliding doors
Hinged French doors need swing clearance and a reliable meeting point between leaves. Sliding systems use tracks, rollers, and a different threshold. Neither is universally cheaper. Compare the opening, ventilation, access, furniture path, weather exposure, repairability, and desired clear width.
Repair or replace
Repair may fit when one leaf, pane, lock, hinge, seal, or trim component is failing and the frame remains square and weather-tight. Replacement is more plausible when the frame or threshold is damaged, alignment is persistent, multiple components fail, or a different opening configuration is wanted. Ask for the outcome, not just the product: both leaves should close, latch, lock, seal, and drain as intended.