What setback requirements apply to decks in Saint John NB?

Decks in Saint John are generally subject to setback requirements of 1 to 3 metres from property lines, with the exact distance depending on your specific zoning designation and whether the deck is in a front, side, or rear yard. These setbacks are enforced through Saint John's zoning bylaw and are verified during the building permit review process.

In Saint John, all deck permit applications are processed through OneStop, the city's centralized development services office. When you submit your application, OneStop staff review your site plan against the applicable zoning district rules. Rear yard setbacks for decks are typically the most lenient, often requiring a minimum of 1 metre from the rear property line, while side yard setbacks may range from 1.2 to 3 metres depending on the zone. Front yard setbacks are generally the most restrictive and are measured from the street line or the established building line for your block, whichever applies. Corner lots have additional considerations because they have two frontages, and the setback from the flanking street side is usually greater than a standard side yard requirement.

It is important to understand that in Saint John, the setback applies to the outermost edge of the deck structure, not just the posts or the point where the deck meets the house. If your deck includes stairs descending into the yard, those stairs and their landing also count toward the setback calculation. Any portion of the deck that encroaches into the required setback will be flagged during review and must be revised before a permit is issued.

Saint John also has specific considerations for properties in flood-prone areas, particularly in neighbourhoods along the Saint John River and its tributaries. If your property falls within a designated flood zone, you may face additional requirements including elevation certificates and minimum deck heights relative to established flood levels. These properties may also have restrictions on the type of foundation or footing system used, since footings in flood zones must resist both frost heave at the NB-required depth of 1.2 metres in southern New Brunswick and potential hydrostatic pressure from rising water tables.

For homeowners who are unsure about their exact property boundaries, it is strongly advisable to have a survey completed before submitting your permit application. Building a deck that unknowingly encroaches on a neighbouring property or violates a setback requirement can result in an order to remove the encroaching portion, fines between $500 and $5,000 under the New Brunswick Building Code enforcement provisions, and complications if you later try to sell the property. Title insurance does not typically cover structures built without permits or in violation of known setback rules.

If your proposed deck cannot meet the standard setback requirements due to an irregularly shaped lot or other hardship, you may apply for a variance through Saint John's planning process. Variance applications require notice to adjacent property owners and are decided by the planning advisory committee, which adds several weeks to the overall approval timeline beyond the standard 2 to 4 weeks for a straightforward permit.

---

Find a Deck Building Contractor

New Brunswick Decks connects you with experienced contractors through the https://newbrunswickconstructionnetwork.com:

• R.e.j Construction ✓
• Eastbound Homes ✓
• Duguay Construction ✓