Parks Canada dock and shoreline permits on the Trent-Severn

If your property touches the Trent-Severn Waterway, including anywhere on the Severn River from Washago to Port Severn, Parks Canada must approve almost anything you build, repair, place or remove in the water or at the shoreline. In Parks Canada's words, "all work on, over or under the bed and waters of the Trent-Severn Waterway requires a permit." That covers seasonal docks, repairs, boathouses, shoreline walls, dredging and even weed removal. The application fee for an individual is $63.25, permits last one year, and nothing in the water is grandfathered.

This guide explains the rules in plain language, using Parks Canada's own pages and its Policies for In-Water and Shoreline Works and Related Activities (the policy document that applies to both the Rideau Canal and the Trent-Severn). Policies and fees change, so treat this as a map and confirm your specific project with a Parks Canada permitting officer.

Why does Parks Canada control my waterfront?

The Trent-Severn is a national historic site. Parks Canada says it has ownership and jurisdiction over the bed of the waterway and its lakes and rivers, up to the original upper controlled water elevation. Your deed usually stops at or near the water. The bottom in front of you, where your dock cribs or posts sit, belongs to the Crown and is managed by Parks Canada under the Historic Canals Regulations.

Waterway lands also include lock stations, islands and some upland parcels bought when the canal was built. Some of these are licensed to private owners, which is covered further down.

What needs a Parks Canada permit?

Parks Canada lists installing, repairing, replacing, relocating or removing any temporary, seasonal or permanent structure, including:

• docks (including seasonal and floating docks), boatlifts and swim rafts
• boathouses, boatports and inland wetslips
• launch ramps, dock abutments and marine railways
• shoreline stabilization such as rip-rap or shore walls
• dredging, including moving sunken logs, stumps or rocks
• removing aquatic vegetation

What about ordinary maintenance?

The policy document separates routine upkeep from structural work. Regular maintenance and repair that does not alter a structure or add to it is allowed without a permit. Major structural repairs, such as work on beams, joists, stringers, cribs and piles, need one. If you are not sure which side of the line your project falls on, ask before you start.

Do upland boathouses need a permit?

A dry boathouse that sits entirely above the high water mark does not need a Parks Canada permit. The marine railway, dock and shoreline work that go with it do. A wetslip boathouse, where a slip is dug into the land, needs a permit for the excavated slip and for any part of the building over the bed.

What are the size limits for docks and boathouses?

These are the key numbers from Parks Canada's policy document for residential properties. The Township of Severn's zoning by-law (section 3.1.12, Shoreline Structures) repeats most of them, so on the Severn River you are usually held to the same limits twice.

Rule	Parks Canada policy
Total shoreline with structures	No more than 25% of your frontage or 15 m (50 ft), whichever is less (erosion protection excluded)
Setback from side lot line	4.5 m (15 ft), measured along the lot line projected into the water
Dock envelope	Must fit within 8 m x 10 m (26 x 32 ft) next to shore; Parks Canada's FAQ gives 32 ft as the maximum length
Dock width	2.4 m (8 ft) maximum, plus up to two fingers no wider than 2 m (6 ft)
Dock and fingers combined	45 m² (452 sq ft) maximum surface area
Open water at shore	First 3 m (10 ft) from shore must be an open span
Open spans overall	At least 50% of the dock's total length
Supporting structure (cribs, piles)	15 m² (160 sq ft) total footprint
Number of docks	One per lot, or two on a water-access-only property
Boathouse envelope	Whole structure, including cribs, eaves and attached dock, fits within 8 m x 10 m
Boathouse roof	Pitched or hipped, no more than 4.5 m (15 ft) above the upper controlled water level; flat roofs not allowed
Boathouse use	One per lot, single storey, electricity is the only service allowed

A few other rules catch people out:

• No gazebos on docks, and boatlifts must be an open design with no walls.
• Solid docks are not approved. Floating, cantilevered, post or pipe docks are preferred. Crib docks with open spans may be allowed where wave action or large boats justify them, and crib rock must be clean stone brought from land, never taken from the lake or river.
• Treated wood that meets federal and provincial guidelines is allowed only if it is pre-treated, dry and not in contact with the water. Creosote is not approved.
• Shallow water. Where it is very shallow, Parks Canada may allow a longer dock to reach about 1 m (3 ft) of depth for mooring.
• Neighbours. For a new boathouse or boatport you must show you told the adjacent owners and gave them a chance to comment.

Severn's by-law adds its own conditions for boathouses, including that a lot needs at least 30 m of water frontage to have one.

Shoreline stabilization, dredging and weeds

Shoreline stabilization

Parks Canada's order of preference is keeping native vegetation, then bio-engineering (planting), then rip-rap. Rip-rap is normally approved when it uses clean, imported angular stone about 10 to 45 cm, sits on geotextile fabric, and has a slope of about 3:1 (no steeper than 2:1 without a geotechnical report). Vertical shore walls are only considered when those options will not work. Encroaching onto the bed is limited, generally to 1 m to protect shrubs or 1.5 m to protect trees, unless an engineer supports more.

Dredging

Parks Canada generally discourages dredging. Where allowed in front of a home, it is limited to 25% of the shoreline to a maximum of 15 m, and a single boat channel can be no wider than 6 m (8 m if shared with neighbours). Dredged material must be tested and placed at least 15 m back from the water. Because the river bed can hold historic remains, a dredging area over 12 m² that has not been disturbed before usually needs an underwater archaeological assessment, at your cost. Parks Canada says these typically run from several thousand to tens of thousands of dollars, and they do not guarantee approval.

Aquatic vegetation

You need a permit before removing any aquatic plants. Parks Canada issues vegetation permits for five years. Harvesting can cover 50% of your frontage to a maximum of 10 m (30 ft) wide, out to 30 m (100 ft) from shore, in daylight, and the cut material must go at least 15 m inland. Emergent plants such as cattail, bulrush, pickerel weed and pond lily cannot be removed, and logs and rocks on the bottom stay put. Fallen trees are different: Parks Canada says landowners are responsible for removing trees that fall from their property into the waterway.

When can the work happen?

To protect fish spawning, the policy says no in-water work between March 15 or March 31 (depending on the water body) and June 30. Lakes with lake trout or whitefish can have extra fall and winter restrictions. One exception helps cottagers: a floating dock that was already approved and is removed each year can go back in the same spot during spawning season, as long as it can be floated in and anchored without disturbing the bed.

Parks Canada does not publish a standard processing time. It depends on volume, complexity and whether an impact assessment, Species at Risk Act review or expert input is needed. Its advice is to apply several months before you plan to start. In practice that means applying over the winter for summer work.

How do I apply?

For questions, the Trent-Severn Waterway office is at trentsevern@pc.gc.ca, and the aquatic vegetation page lists 705-750-4900 or 1-888-773-8888.

What happens with unpermitted structures when you buy or sell?

This is where the permit system matters most in a real estate deal.

Nothing is grandfathered. Parks Canada's FAQ says no in-water structures are "grandfathered" or exempt from its policies. Some unauthorized or non-conforming structures may be allowed to be repaired, but if a structure is removed, its replacement must meet the policy. That means an oversized old boathouse or a long crib dock may be worth less than it looks, because it cannot necessarily be rebuilt as is.

Permits do not transfer. Parks Canada says new owners must submit their own application. If a seller had a permit for work that was never finished, the work "is likely to be permitted again," but the buyer still applies.

A buyer cannot assume the dock is legal. When asked whether an existing dock is permitted, Parks Canada answers that a complete application is needed to determine whether a structure can be placed over the bed, and that when a new owner repairs, replaces or removes structures they may need to be altered or removed to meet policy.

Parks Canada land and licences along the shore

Some cottages sit partly or wholly on Parks Canada land held under a licence of occupation rather than owned outright. Parks Canada's licences page says:

• anyone occupying waterway land needs a licence, and occupying it without one is treated as trespass, with structures removed at the occupier's expense
• residential and cottage licences are for seasonal use only (winter visits for insurance purposes are allowed), and RVs or motor homes may not occupy licensed land
• annual rent for residential and cottage lots is 7.5% of the appraised land value; access lots run $100 to $500 a year
• licences cannot be transferred. When a property sells, the existing licence is cancelled and a new one is issued to the buyer, and anyone buying or selling privately owned structures on Parks Canada land must contact Parks Canada

If a listing mentions a "licence," "water lot," "Parks Canada lease" or "TSW lot," get the licence and a written answer from Parks Canada (trentsevern@pc.gc.ca) before you firm up. A new licence is $118 under the current realty fee list. Your lawyer should also check for an original shore road allowance, which is a separate issue covered in our shore road allowance guide.

Planning applications and Parks Canada

Parks Canada is circulated as an adjacent landowner on severances, minor variances and rezonings along the waterway, and it gives advice to the municipality. If you are planning a severance or a variance on Severn River land, expect Parks Canada and the township planning department to both have a say.

How Jordan can help

Jordan Rossman is a REALTOR® with Real Broker Ontario Ltd., Brokerage, and has worked in Orillia-area real estate since 2014. On Trent-Severn listings and purchases he asks for permit records up front, writes offers with conditions that give you time to check Parks Canada and township files, and points you to the officers who can answer your specific dock or boathouse question. Call 705-345-0797 before you write an offer or start a shoreline project.