Elegant French Door Installation for Your Home

French doors in Toronto in 2026 occupy a specific niche in the doors-windows category: the premium interior or exterior swing-pair door used to separate large living areas, open onto a deck or terrace, or function as an upscale entry. Three distinct scopes drive 2026 GTA pricing per pair: interior french door pair (no exterior weatherseal, hardwood or hollow-core slabs, decorative glass inserts) at $2,500-$4,500 installed; exterior french door pair (full weatherseal, multi-point locking, low-e tempered glass, fibreglass or wood slabs) at $4,500-$8,500; and premium custom (mahogany / Sapele / hardwood with custom decorative lead-glass or beveled glass inserts, sidelights, transoms, brass or wrought-iron hardware) at $8,500-$15,000 for a high-end estate entry pair.

Interior french doors — the design and install playbook:

Interior french doors are a high-impact upgrade in 2026 GTA renovations — most commonly between living and dining rooms in 1960s-1990s detached, between a home office and main living area in 2020s+ remodels (work-from-home boom), and between a primary bedroom and an ensuite or sitting room. Standard scope: pair of 30 inch x 80 inch slabs (60 inch nominal opening, fits a standard 30 inch + 30 inch double rough opening at 62 inch x 82 inch RO), 6-panel divided-light glass inserts with clear or frosted privacy glass, prehung in primed pine or composite jamb with double-rabbet astragal where the active and passive slabs meet, standard mortise hinges (3 per slab), single-cylinder deadbolt and lever set on the active slab, surface flush-bolts top and bottom on the passive slab. Materials cost $800-$1,500 per pair at Home Depot or Lowes; Doors Plus (Toronto retailer) carries premium options at $1,500-$3,500 per pair.

Install scope ($800-$1,000 labour on a like-for-like swap, $1,500-$2,500 on a new opening cut into an existing wall): jamb plumb and square setup, slab swing test, astragal alignment, flush-bolt strike-plate routing, lever and deadbolt strike-plate routing, weatherstrip on interior french doors is optional (interior application has no air-leakage requirement), final paint or stain matching existing trim.

Exterior french doors — code and weatherseal requirements:

Exterior french doors are subject to OBC 9.7 fenestration U-value ceiling (1.6 Btu/hr·sq ft·F in Climate Zone 2 GTA), CAN/CGSB-12.1 tempered glass requirement (tempered safety glazing in any glass insert), AAMA NAFS-11 install standard, and Energy Star Most Efficient eligibility for rebate. Standard exterior french pair: 30 inch x 80 inch fibreglass slabs (Therma-Tru Classic Craft, Masonite Belleville, JELD-WEN IWP Aurora), 1-3/4 inch slab thickness, polyurethane core, full-lite or 3/4-lite tempered low-e glass inserts, prehung in composite or pre-painted steel jamb with double-rabbet astragal, Q-Lon kerf-mount weatherstrip on all four sides plus astragal, aluminum sill with adjustable threshold, multi-point European-style locking on the active slab (Mul-T-Lock Hercular, Medeco M3, or Schlage F-Series Encode with three-point engagement), surface or mortised flush-bolts top and bottom on the passive slab.

Hardware criticality on exterior french pairs: the astragal between the active and passive slabs is the weakest air-seal point on the entire envelope assembly. Q-Lon double-bulb astragal weatherstrip (Endura Astragal or Pemko 18061) is the industry standard. Passive-slab flush-bolt engagement is the critical security and weatherseal detail — the top flush-bolt engages a strike in the head jamb, the bottom flush-bolt engages a strike in the threshold. Improperly aligned flush-bolts leave a draft path and security vulnerability — the most common 2026 GTA exterior french door warranty callback.

Brand whitelist for exterior french pairs: Therma-Tru Classic Craft fibreglass (Energy Star Most Efficient eligible), Masonite Belleville fibreglass, JELD-WEN IWP Aurora fibreglass, Pella Architect Series Reserve fibreglass-clad wood, Simpson Performance Series mahogany or fir, Provia Heritage steel-or-fibreglass.

Premium custom french door scope:

Estate-grade french door pairs in 2026 GTA — typically commissioned for new-build custom homes in Forest Hill, Bridle Path, Rosedale, Mississauga's Mississauga Road and Lorne Park, Oakville's Joshua Creek and Bronte, or Burlington's Tyandaga and Roseland — start at $8,500 per pair installed and routinely hit $15,000+ for: mahogany or Sapele slabs from Simpson Performance, Rogue Valley Door, or Andersen Architectural; custom decorative glass with beveled, leaded, frosted, or art-glass inserts; flanking sidelights (single or double width); transom above (rectangular or arched); blacksmith-forged handle set (Rocky Mountain Hardware, Sun Valley Bronze, Ashley Norton); marine-grade pre-finished exterior coating; Mul-T-Lock or Medeco high-security multi-point lock with side-bolt engagement. Lead time 6-12 weeks on custom orders.

Sidelights and transoms — design and structural considerations:

Sidelight flanking an exterior french pair adds 8 inches to 16 inches per side to the rough opening (typical 8-inch sidelight = small accent; typical 14-inch sidelight = full daylight flanking). All sidelight glass is tempered per CAN/CGSB-12.1. Transom above the head adds 12 inches to 24 inches to the head dimension. The structural lintel above the combined door + sidelights + transom assembly must be engineered for the combined opening width: at 60 inch active+passive plus 28 inch sidelights = 88 inch rough opening width, the lintel requires a steel W6 x 12 wide-flange or a multi-ply LVL header per Ontario Pre-Engineered Lintel header certification or P.Eng stamp. Toronto building permit required for any new opening cut into a load-bearing exterior wall.

Hardware for french doors — depth dive on the lock options:

• Schlage F-Series Encode: smart-lock with Wi-Fi, deadbolt + handle combo, single-point engagement. Acceptable for interior french. Marginal for exterior french (single-point lock + flush-bolts only — not multi-point on the active slab).
• Kwikset Halo: Wi-Fi smart-lock alternative to Schlage Encode. Same single-point engagement limitations.
• Mul-T-Lock Hercular Multi-Point: European-style 3-point or 5-point locking system. Top, middle, bottom engagement on the active slab into corresponding strikes on the passive slab + frame. Best-in-class air-seal and security on exterior french. $400-$700 hardware cost. Recommended for any exterior french pair RenoHouse installs.
• Medeco M3 Multi-Point: High-security pin design with side-bar engagement. Top-tier security; same multi-point engagement as Mul-T-Lock. $500-$900 hardware cost. Specified on estate-grade install.
• Yale Assure Multi-Point: European-style multi-point alternative. Mid-tier price point ($300-$500).

Compliance summary:

OBC 9.7 fenestration U-value ceiling 1.6 Climate Zone 2 (GTA). CAN/CGSB-12.1 tempered safety glazing in all french-door glass inserts, sidelights, and transoms (within 600 mm of any door — all french door glass falls within this distance). CSA A440 air/water/wind class (A2 / B5 / C3 minimum recommended for GTA exterior exposure). CSA A440.4 install practice. AAMA NAFS-11 install standard. Energy Star Most Efficient eligibility for HRS + Greener Homes rebate (ER >29). OBC 9.9.10 egress if the french pair functions as the primary egress from a bedroom (rare but possible — the active slab swing must clear minimum 0.35 sq m openable area). Toronto building permit + structural lintel review for any new opening or rough-opening enlargement.

Rebate landscape:

Ontario HRS: $200/door pair Energy Star Most Efficient. Canada Greener Homes Grant: up to $500 per door pair (counts as 2 doors). Combined stacked rebate on a $4,500 exterior french pair: net approximately $3,800.

Common Toronto-specific pain points:

Existing single-door opening converted to a french pair: rough opening must double in width, structural lintel above must be re-engineered, brick veneer or cladding must be cut and re-finished at the new opening edges, interior drywall must be cut back and re-cased. Adds $1,500-$3,500 to scope beyond the door material cost. Sloping deck or patio in front of an exterior french opening: threshold transition must accommodate the slope — a 4-inch slope drop over 60 inch active+passive width is workable with a sloped sill pan; greater than 4-inch slope requires deck framing modification to level the threshold landing pad. Pre-1990 stock with single-door exterior swing replaced by exterior french pair: nearly always requires upsized lintel, brick-veneer cutting, and electrical relocation (porch light, doorbell) — full scope routinely $6,000-$10,000 installed.

WSIB clearance + $2M general liability + $1M property damage insurance required on every Toronto residential french door install we submit. RenoHouse serves Toronto, Mississauga, Brampton, Vaughan, Markham, Richmond Hill, Thornhill, Oakville, Burlington, Etobicoke, Scarborough, North York, and all GTA communities. Russian-speaking coordination available. Call 289-212-2345 for a free in-home french door consultation.

Toronto/GTA neighborhood considerations

• Forest Hill / Rosedale / Lawrence Park (heritage): Heritage solid-mahogany or stained-glass French-door pair — Simpson Performance Series, Andersen Architectural mahogany 1-3/4 inch slab, leaded/beveled-glass with brass cames, Baldwin or Emtek mortise lockset. Typical custom pair $8.5K-$18K installed.
• North York / Scarborough / Etobicoke (60s-70s): 1960s standard 5-foot French opening — Therma-Tru or Andersen 400 Series fibreglass French pair with low-e tempered glass + Schlage F-Series Encode multi-point + Q-Lon weatherstrip. Typical $3.8K-$6.8K.
• Mississauga / Brampton / Vaughan (90s+): 1990s standard 5-6 foot French opening — Energy Star Most Efficient Andersen 400/Marvin Elevate fibreglass pair $4.2K-$7.2K including ER>29 for Greener Homes rebate.
• Caledon / King City / Aurora (rural well): Rural detached patio opening — Andersen E-Series or Marvin Signature Ultimate French-out-swing pair with marine-finish + storm-rated tempered glass (CSA-rated wind 240km/h). $6.5K-$12K.
• Downtown condos: Interior French-door pair to bedroom/den — Masonite West End or TruStile TS Series solid-core with frosted-glass or full-lite tempered glass + Emtek dummy + active mortise. $2,400-$5,500 installed.

Permit + license: OBC 9.6 doors, OBC 9.7.1.1 thermal performance, OBC SB-12 prescriptive ER ≥ 29. OBC 9.6.4 tempered safety-glass within 1m of door. No trade license but Toronto Building Permit at structural rough-opening. Greener Homes Grant + HRS rebate.