Do i need heritage approval to replace the windows on my Loyalist-era home in Saint John's Trinity Royal heritage area?

Yes — replacing windows in Trinity Royal almost certainly requires heritage approval before you touch anything, and skipping this step can result in orders to restore the original work at your own expense.

Trinity Royal is Saint John's designated heritage conservation area, protected under New Brunswick's Heritage Conservation Act (SNB 2009, c H-4.05). The City of Saint John has its own Heritage Conservation Board (HCB), and any exterior alterations to a designated heritage property — including window replacement — require a Heritage Permit in addition to the standard building permit from the City's Growth & Community Services department.

The key word here is exterior. Interior window work (replacing glazing, weatherstripping, hardware) generally doesn't trigger heritage review, but the moment you're changing what's visible from the street — sashes, frames, muntins, profiles, or materials — you're in heritage territory.

What the Heritage Conservation Board typically looks for in Trinity Royal window applications comes down to a few core principles: maintaining original window openings (no resizing), matching the divided-light pattern and muntin profiles of the originals, using appropriate materials (wood is strongly preferred; vinyl is almost always rejected in primary elevations), and preserving or replicating original decorative elements like hood moulds or brick surrounds. If your home has original 6-over-6 or 9-over-6 double-hung sashes, the board will expect any replacement to replicate that pattern closely.

Your realistic options fall into two camps. Restoration — repairing existing sashes, re-glazing with new glass, adding interior storm windows — is almost always the fastest path through the HCB and often the most cost-effective when the original frames are structurally sound. Interior storm windows (Innerglass, Indow, or similar) can dramatically improve energy performance without touching the exterior at all, and they don't require heritage approval. Replacement with custom wood windows matching original profiles is approvable but expensive — budget $800–$2,500+ per window for custom heritage-profile wood units, versus $300–$700 for standard vinyl (which you likely won't get approved on a primary facade anyway).

Contact the City of Saint John Heritage Officer through Growth & Community Services at (506) 658-2835 or saintjohn.ca before ordering anything or hiring a contractor. The heritage permit application is reviewed by the HCB, which meets on a scheduled basis — build 4–8 weeks into your timeline for the approval process. Your building permit for the window replacement comes from the same department.

One practical tip: bring photos of your existing windows and any historical photos of the property to your pre-application meeting with the heritage officer. Staff are generally very helpful in guiding applications toward approval, and an informal conversation before you submit can save you from a rejection and restart.

Once approved, make sure your contractor is experienced with heritage window work — this is not a standard window installation job. Browse the New Brunswick Construction Network directory to find contractors familiar with heritage restoration work in the Saint John area.