St Catharines Fence Bylaw Guide in Niagara Region, Ontario

St. Catharines runs its own fence rules, separate from Niagara Falls and Niagara-on-the-Lake, and one of them is easy to get wrong if you assume the same province-wide process applies everywhere: St. Catharines has opted OUT of Ontario's Line Fences Act. Here is what actually applies, in order. Step 1: check whether a conservation authority has to approve the fence first. Under Ontario Regulation 41/24, no one may build a structure of any kind -- a fence included -- in a wetland, within 30 metres of a wetland, in a river or stream valley, or in certain other hazardous or shoreline lands, without the Niagara Peninsula Conservation Authority's (NPCA) approval. The regulation's own fence exemption is narrow: a fence is exempt only if it is a rail, chain-link, or panelled fence with at least 75 millimetres of open width between panels and sits outside a watercourse or wetland -- a SOLID PRIVACY FENCE, the kind most of our customers actually build, has NO exemption under this regulation, at any height or size. To check whether your property sits in a regulated area, NPCA's Watershed Explorer mapping tool is the place to start, and a call to NPCA at 905-788-3135 for a pre-consultation is the practical next step either way -- see /fence-bylaw-guide/ for the full conservation-authority fee-band and penalty detail, which applies the same way regardless of which of the three towns it covers you are in. Step 2: check the municipal height and setback bylaw. By-law No. 2014-068 (as amended by By-laws 2014-214, 2024-122, 2025-040, and 2025-055), s.8.2, sets a confirmed maximum fence height of 1 metre in a required front yard and 2 metres in any other yard. On a corner lot, a separate rule applies to the sight triangle at the intersection: s.8.1(i) caps anything in the sight triangle at 1 metre, the triangle itself runs 6.0 metres along each lot line in residential zones (7.5 metres in other zones, 3 metres for non-residential under s.8.3), measured from grade using the mean of the two lots within 0.6 metres of a lot line (s.8.2); a driveway sight triangle is 4.5 metres, with the same 1 metre cap. One exception to the "fences don't need a building permit" rule: a fence that encloses a swimming pool or hot tub generally DOES need a municipal building permit under By-law 2014-068's own Section 9, separate from this height-and-setback check -- see /permit-guide/ for the town-by-town pool-enclosure permit figures. Step 3: know that the Line Fences Act itself does NOT apply here. By-law No. 2014-068, s.12.11, states that "the provisions of the Line Fences Act ... do not apply to all or any part of the City of St. Catharines, save and except for section 20" -- and section 20 only concerns former-railway land next to a farming business, not an ordinary residential fence. That means a St. Catharines homeowner has no fence-viewers to call and no statutory route under the Act to compel a neighbour to share the cost of a shared boundary fence, unlike in Niagara Falls, where the Act does apply -- if your neighbour disagrees about paying for a shared fence, the enforceable route here is a private written agreement between the two of you (Line Fences Act section 16), not a municipal fence-viewers' award. Step 4: confirm the current bylaw and process with the City of St. Catharines' own building department before you build; a bylaw can change, and the City administers this by-law independently of Niagara Falls and Niagara-on-the-Lake. For the fuller cross-town comparison, the Line Fences Act mechanics as they apply where the Act IS in force, and the province-wide legal citations, see /fence-bylaw-guide/.