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Retaining wall materials and construction field guides

Retaining Wall, Fence, Deck, Interlock & Commercial Resources

Clear, locally relevant guides about wall, fence, deck and interlock costs, permits and materials — plus commercial site rules for contractors, developers and owners.

Est. 2020200+ projectsUnilock / Techo-Bloc / Permacon wall systems

Retaining wall guides

How Much Does a Retaining Wall Cost in Hamilton? (2026 Guide)

How Much Does a Retaining Wall Cost in Hamilton? (2026 Guide)

Retaining-wall cost in Hamilton depends on wall height and length, material, excavation access, drainage, reinforcement, demolition and permit or engineering needs. A site visit is required for a defensible price because two walls with the same visible size can require very different foundations.

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Retaining Wall Permits in Hamilton, Burlington & Oakville

Retaining Wall Permits in Hamilton, Burlington & Oakville

A retaining wall is a designated structure under Ontario rules when it exceeds 1 metre in exposed height and is beside public property, building access or property open to the public. Other building, grading, site-alteration and conservation requirements may apply, so always confirm with your municipality before construction.

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Armour Stone vs Block Retaining Walls

Armour Stone vs Block Retaining Walls

Choose armour stone for a broad, natural landscape where equipment access and wall footprint are available. Choose segmental block for cleaner geometry, tighter footprints, curves and engineered reinforcement options; neither is universally better.

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Why Retaining Walls Fail: Warning Signs & Causes

Why Retaining Walls Fail: Warning Signs & Causes

Retaining walls usually fail because water pressure, settlement, frost, missing reinforcement or loads behind the wall exceed what the system can resist. Leaning, bulging, widening joints and soil washout are warnings that need assessment—not cosmetic patching.

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Best Retaining Wall for a Sloped Backyard

Best Retaining Wall for a Sloped Backyard

The best retaining wall for a sloped backyard depends on what the new level must do. Reinforced block often suits compact usable space, armour stone suits broad natural grades, and properly spaced terraces can create gardens, stairs and multiple outdoor levels.

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Replacing Timber & Railway-Tie Retaining Walls

Replacing Timber & Railway-Tie Retaining Walls

Old timber and railway-tie retaining walls fail as wood decays, fasteners loosen, drainage clogs and soil pressure pushes the face outward. Replacement should remove unsuitable material, rebuild the foundation and drainage, and use a wall system matched to the site.

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Interlock & patios

Grey herringbone paver driveway with a charcoal border in front of a brick home, with a tape measure and clipboard resting on the pavers

How Much Does Interlock Cost in Hamilton? (2026)

Typical Ontario installed ranges (2026) are $25–$45 per sq ft for interlock driveways and patios, $20–$35 for walkways and $35–$55 for natural stone or porcelain. A 600 sq ft driveway therefore works out to $15,000–$27,000 before site-specific items. Your exact price comes from an on-site quote.

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Three neighbouring suburban homes with an interlock driveway, a black asphalt driveway and a light grey concrete driveway side by side

Interlock vs Asphalt vs Concrete Driveways

Interlock costs more up front than many surfaces — typical Ontario installed ranges (2026) are $25–$45 per sq ft — but individual pavers can be lifted and relaid, so repairs blend in. Asphalt needs periodic sealing and eventual resurfacing; concrete can crack and patches stay visible. We only install interlock, so we do not quote asphalt or concrete prices.

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Close-up of an older concrete paver walkway with a sunken low spot holding a shallow puddle and weeds growing between uneven joints

Why Do Interlock Pavers Sink? Causes and Fixes

Interlock pavers usually sink because the base underneath was too thin, poorly compacted or washed out by water. Missing edge restraint, tree roots, utility cuts and freeze–thaw on wet clay also move pavers. Most cases are fixed by lifting the pavers, correcting the base and relaying them; repair pricing is quoted on site.

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Two-storey brick home with a double-width paver driveway beside a large green front lawn, sidewalk and grassy boulevard at the curb

Driveway Widening Rules: Hamilton, Burlington, Oakville

In Hamilton, a new or widened driveway approach needs Residential Driveway Access approval and at least 50% of the front yard must stay green space. Burlington generally requires a Driveway Modification permit before widening. Oakville's Driveway Permits Procedure covers widening and other changes. Confirm current requirements with your municipality before work starts.

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Push broom sweeping grey polymeric sand into the joints of large concrete patio pavers, with a pump sprayer and bucket nearby

Polymeric Sand and Paver Sealing: A Practical Guide

Polymeric sand is joint sand with binders that harden when misted, locking pavers together and discouraging weeds and washout. It must go onto dry pavers, be swept and compacted into full joints, and have haze removed before misting per the maker's instructions. Sealers are optional; choose natural or enhanced finishes and recoat on the maker's schedule.

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Overhead view of a patio where herringbone, running bond, basketweave and large-format slab paving meet, separated by charcoal soldier-course borders

Paver Patterns and Styles: Choosing the Right Look

Herringbone — at 45° or 90° — is the go-to pattern for driveways because it interlocks well under turning tires. Running bond and large-format slabs suit patios and walkways, basketweave adds a traditional look, and random multi-size patterns feel more natural. Soldier or sailor borders frame the field and help hold the edge.

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Grey and charcoal paver patio with light wear and autumn leaves behind a brick house

How Long Does Interlock Last, and What Do Paver Warranties Cover?

Unilock and Techo-Bloc back their residential concrete pavers with a transferable lifetime warranty on structural integrity, and Permacon offers a transferable 50-year prorated one. The parts that wear out first are the joint sand, the sealer and a poorly built base, not the stone. None of these warranties cover labour, sinking from base settling, or the white haze called efflorescence.

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Weathered concrete steps beside grey paver steps at a brick bungalow entrance

Can You Lay Pavers Over a Concrete Patio, Porch or Steps?

Yes, but only if the concrete is in excellent shape: no heaving, no rocking sections, no wide cracks, and sloped away from the house at least 1 inch per 8 feet. Unilock says poor drainage is the most common risk, so flat slabs need drain holes and a thin, free-draining bedding layer. If the slab moves or holds water, remove it and build a proper compacted stone base.

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White powdery haze on charcoal pavers with a plastic-bristle brush nearby

What Is the White Haze on My New Pavers?

The white, powdery haze on new concrete pavers is usually efflorescence: natural calcium salts that moisture carries to the surface. Unilock says it does not affect the strength or durability of the pavers and is cosmetic and "temporary in nature." Scrub it with dish soap, water and a stiff plastic brush, and don't seal pavers until it's gone.

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Fresh tan and grey paver driveway at a two-storey house in late autumn

When Is the Best Time to Install Interlock in Ontario?

Interlock can be installed whenever the ground isn't frozen, which Unilock puts at roughly May 1 to December 1. The real late-season limit is polymeric joint sand: one common product needs temperatures above 5 °C for 48 hours after it's applied and no rain for 24 hours. With that product, wait at least 24 hours to walk on it and 72 hours to drive on it, and wait about 2 to 3 months before sealing.

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Rain-wet driveway pavers with wide stone-filled joints beside a brick house

Do Permeable Pavers Lower Hamilton's Stormwater Fee?

Not for a typical house. Hamilton charges homes a flat stormwater fee based on dwelling type, not on how much hard surface you have, and the fee credits are for non-residential properties only. Permeable pavers can qualify for the City-funded Rain Ready Hamilton rebate, run by Green Venture, but only for projects approved before work starts; the 2026 application window closed April 22, 2026.

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Decks & fences

Horizontal cedar fence with a tape measure and notepad on a post cap

How Much Does a Fence Cost in Hamilton? (2026 Guide)

Typical Ontario installed ranges (2026) run from about $15–$40 per linear foot for chain link up to $55–$95 for composite, with pressure-treated wood at $30–$55 and cedar at $45–$75. A 100 ft pressure-treated privacy fence therefore lands around $3,000–$5,500 before gates and removal. Your exact price comes from an on-site quote.

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Low black aluminum front-yard fence and taller wood side-yard fence with a survey stake

Fence Bylaws in Hamilton, Burlington & Oakville (2026)

Most residential fences in Hamilton, Burlington and Oakville are limited to about 2.0 m in rear and side yards, with much lower limits in front yards and visibility areas. Hamilton allows 0.9 m within 3.0 m of the front lot line; Oakville allows 1.5 m in the front yard with anything above 1.0 m being open lattice. Confirm current rules with your municipality before building.

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Wood privacy fence and black aluminum fence in a snowy Ontario backyard

Best Fence Material for Ontario Winters

There is no single best fence material for Ontario winters; the foundation matters more than the board. With posts set about 4 ft deep in concrete below frost, vinyl, aluminum and composite offer the longest low-maintenance lifespans (roughly 20–30+ years), while pressure-treated wood remains the value choice for privacy.

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Black aluminum pool enclosure with a self-closing gate

Pool Fence Requirements in Hamilton, Burlington & Oakville

Hamilton issues an Enclosure Permit through the Building Division; the fence must be at least 1.5 m high, pass no 100 mm sphere and have a self-closing gate latched inside at 1.35 m or higher. Burlington requires 1.2 m for wood or 38 mm chain link and 1.5 m for wrought iron. Oakville requires 1.20 m with a gate that closes within 30 seconds. Confirm current rules with your municipality before building.

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Shadowbox fence finished on both sides between two backyards with a survey stake

Building a Fence on the Property Line in Ontario

Before building on or near a property line in Ontario, confirm the line from a survey and agree the plan with your neighbour in writing. The Line Fences Act can arbitrate cost sharing where it applies, but it cannot decide where the boundary is. Oakville uses its own Division Fence By-law instead; Hamilton uses the Act; check Burlington's approach with the City.

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Cedar and pressure-treated fence boards shown side by side

Cedar vs Pressure-Treated Fence: An Honest Comparison

Pressure-treated wood is the more affordable, widely chosen privacy fence, at a typical Ontario installed range (2026) of $30–$55 per linear foot with a 15–20 year lifespan. Cedar costs more at $45–$75 but offers richer natural colour, lighter weight and 15–25 years. Your exact price comes from an on-site quote.

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Brown composite deck with black aluminum railing behind a brick home, with a tape measure and deck plan on the boards

How Much Does a Deck Cost in Hamilton? (2026 Guide)

Typical Ontario installed ranges (2026) run about $45–$65 per sq ft for pressure-treated wood, $55–$80 for cedar, $65–$95 for composite and $80–$110 for PVC. A 12 × 16 ft (192 sq ft) composite deck therefore lands around $12,480–$18,240 before stairs, railings and site work. Your exact price comes from an on-site quote.

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Pressure-treated deck frame on concrete piers attached to a brick house, with rolled drawings on a sawhorse

Do You Need a Deck Permit in Hamilton, Burlington or Oakville?

In Hamilton and Oakville, any deck attached to the house needs a building permit, and detached decks need one once they pass size and height triggers — over 10 m² (about 108 sq ft) and more than 200 mm above grade in Hamilton, or over 10 m² and higher than 61 cm in Oakville. Burlington follows Ontario Building Code triggers. Confirm current requirements with your municipality before building.

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Pressure-treated, cedar, grey composite and white PVC deck board samples side by side on a deck

Composite vs Wood Decking: Which Is Best in Ontario?

Pressure-treated wood is the lowest-cost deck at about $45–$65 per sq ft but needs regular staining and lasts roughly 15–20 years; composite costs about $65–$95 per sq ft and typically lasts 25–30+ years with just washing. Cedar sits between for natural warmth, and PVC is the premium, lowest-upkeep choice. Your exact price comes from an on-site quote.

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Composite deck with black aluminum and glass railing and glowing post-cap lights overlooking a treed backyard at dusk

Deck Railing Requirements in Ontario (Guard Height & Rules)

Under the Ontario Building Code, a deck needs a guard once the walking surface is more than 600 mm above adjacent grade. The guard must be at least 900 mm high where the deck is not more than 1.8 m above grade, and at least 1,070 mm above that, with openings that will not pass a 100 mm sphere. Confirm current requirements with your municipality before building.

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Steel helical piles with brackets beside concrete pier footings in excavated clay soil next to a house

Helical Piles vs Concrete Footings for Decks

Deck footings in Hamilton and Halton must bear below frost depth — about 1.2 m / 4 ft — so the deck doesn't heave. Concrete piers are the familiar, widely accepted choice, while helical piles screw in with less digging and can be loaded right away. The right one depends on soil, access and deck design.

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Raised composite deck with lit wide stairs leading down to an interlocking paver patio with a fire table and planting

Deck vs Interlock Patio: Which Is Right for Your Yard?

Choose a deck when your back door sits well above the yard, such as a walkout or raised main floor; choose an interlock patio when the door is close to grade. Many of the best yards use both: a deck at the door with wide stairs down to an interlock patio, which is exactly what we design and build.

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Weathered grey wood deck boards with a strip of new boards beside a house

How Long Does a Deck Last?

A pressure-treated wood deck typically lasts about 15 to 20 years with proper care, according to Canadian retailer Windsor Plywood, while Trex, a composite maker, puts it lower at 10 to 15 years. Composite decks often last 25 years or more, and Trex warranties run 25 to 50 years depending on the product line. Rot in the frame, especially at the ledger board where the deck meets the house, is the main sign a deck needs more than new boards.

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New wood deck boards partly coated in brown stain with a brush and tray

When Should You Stain New Pressure-Treated Wood?

You don't need to wait a full year. The one-year rule comes from a time when pressure-treated wood sold in Canada came with a factory water repellent that had to wear off, and that practice is long gone. Stain once the wood is dry (not after a night of rain), and choose a stain with colour in it, because pigment is what protects wood from UV damage and fading.

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Round footing holes dug in clay soil with a tape measure hanging into one and string lines across the yard

How Deep Do Deck Footings and Fence Posts Need to Be in Ontario?

Under the Ontario Building Code, deck footings must reach at least 1.2 m (about 4 feet) below finished grade, measured to the underside of the footing, to get below frost. The exceptions are footings on sound bedrock and qualifying low, detached floating decks. That rule is for decks, not fences; as one local benchmark, Oakville's standard division fence sets its posts in concrete at least 0.6 m below grade.

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Low composite deck a few inches above a gravel base in a fenced backyard with potted plants

Can I Build a Floating Deck on the Ground or Over a Patio in Ontario?

Yes, in many cases. The Ontario Building Code lets a floating deck skip 1.2 m frost footings if it is no larger than 55 m² (592 sq ft), one storey with no roof, has joists no more than 600 mm above grade (up to 1.2 m with extra bracing), and isn't attached to the house unless a qualified professional confirms movement won't be a problem. Building right on top of an existing interlock patio or concrete slab is a separate question to check with your building department and your decking maker.

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Gardens, sod & mulch

Freshly laid sod rolls with visible seams on a new front lawn with a sprinkler running at sunrise

How Do I Water and Care for New Sod?

Water new sod thoroughly at least twice a day, early morning and late afternoon, until it is established, and make sure the water reaches the soil underneath. Stay off it for at least two weeks (a month is better), and wait at least three to four weeks before fertilizing. In Burlington and Oakville, Halton Region lets you water new sod outside the odd/even schedule until it's established.

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Strip of fresh sod with visible seams beside raked topsoil with newly sown grass seed in an autumn backyard

Sod or Seed: Which Is Better for an Ontario Lawn?

Sod costs more but gives you a finished lawn right away, and it can be laid any time the ground isn't frozen and sod is available, even into late fall. Seed costs far less, about $0.10 to $0.20 per sq ft versus $1.50 to $3.00 installed for sod in Ontario (typical market range, HomeStars sod guide, undated). Seed's best window is short: mid-August through Thanksgiving weekend, according to Mark and Ben Cullen.

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Dark brown shredded mulch in a curved garden bed with hostas and shrubs beside a brick house

How Much Mulch Do I Need?

Multiply your bed area in square feet by the depth in inches, then divide by 324 to get cubic yards. One cubic yard covers about 162 square feet at 2 inches deep, or about 100 square feet at 3 inches. Toronto Master Gardeners don't recommend putting landscape fabric under mulch.

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Front-yard bed with grey and tan river rock along a stone foundation changing to brown mulch around perennials

River Rock or Mulch: Which Should I Use?

Use mulch in planting beds where you want the soil to improve, because organic mulch breaks down and feeds soil life. Use river rock where you want a surface that doesn't decompose, knowing it costs more up front: about US$60 to US$170 per ton for the material (typical market range, Lawn Love, October 5, 2026). Both are usually spread 2 to 3 inches deep.

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Front garden bed in summer with purple coneflowers, black-eyed Susans and orange butterfly weed visited by bees

What Native Plants Grow Well in Hamilton and Halton?

Hamilton's Green Venture grows and gives out native plants such as purple coneflower, black-eyed Susan, butterfly weed, nodding onion, prairie smoke, swamp milkweed and New Jersey tea for local gardens. Hamilton has been rated Zone 6b, with the escarpment "Mountain" a colder 6a, and Natural Resources Canada's 2025 map update moved most of Canada ½ to 2 zones warmer. Check your exact zone with NRCan's municipal lookup.

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Hiring & planning

Pools

Rectangular inground pool with a grey paver deck and black aluminum fence under mature trees

How Much Does an Inground Pool Cost in Ontario? (2026)

Typical installed ranges in Ontario are $55k–$110k for vinyl liner, $65k–$120k for fibreglass and $100k–$250k for concrete (HomeStars, Aug 2026). Fencing, decking and landscaping usually push the full project 40–60% above the pool price (Devine Image, Apr 2026). Rock, crane lifts, spoil hauling and a gas line are the hidden costs that move a budget most.

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Black aluminum pool fence with a self-closing gate and raised latch beside a backyard pool

Pool Permits & Fence Rules in Hamilton, Burlington and Oakville

Hamilton needs an Enclosure Permit from the Building Division; Burlington uses one online Combined Residential Swimming Pool Application (4–6 weeks); Oakville uses a Development Engineering Permit (5-day pre-screen, then 6–8 weeks). Minimum fence heights are 1.5 m in Hamilton, 1.2 m for wood in Burlington and 1.20 m in Oakville. In all three you may not fill the pool until the enclosure passes inspection.

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Three neighbouring backyard pools seen from above: a curved fibreglass pool, a patterned vinyl pool and a tiled concrete pool

Fibreglass vs Vinyl vs Concrete Pools: Which Suits Ontario?

Vinyl liner costs least upfront but needs a new liner every 7–10 years; fibreglass costs more but installs fastest and has the lowest seasonal running cost; concrete offers full design freedom at the highest price and longest build. In Ontario, groundwater and freeze-thaw matter: never fully drain fibreglass, and concrete's weak points are the tile line and coping.

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Thawed spring backyard with survey stakes and orange paint outlining a future pool

When Should You Build a Pool in Ontario?

Book in the fall, design and permit over the winter, and dig once the frost is out in March or April. Fall booking secures an early-spring slot (Orange Pools). A typical project runs 8–12 weeks from design to finish. Fibreglass and vinyl liner are usually swimmable by late May to June; concrete usually July or later. Typical, not a guarantee.

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Pool equipment pad with a pump, sand filter and heat pump beside a pool, with a rolled solar cover

What Does a Pool Cost to Run in Ontario?

Expect up to $1,800–$2,500 a season depending on pool type (MoneySense, Jun 2024), plus $500–$2,000 a year for opening and closing (Boulder Design, Feb 2026). Hydro and gas for pumps and heaters run $1,200–$2,800 a year. A cover saves 50–70% of heating (US DOE), and a heat pump usually costs less to run than gas.

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Bare copper bonding grid laid in gravel beside a new pool shell before the deck is poured

Ontario's Pool Bonding Rules: What They Mean for Your Deck and Fence

Under ESA Bulletin 68-8-4 (May 2026), metal fences, piping, ladders and rebar within 1.5 m of the pool water must be bonded, and many decks need a No. 6 AWG copper grid. That means the paver base, deck pour and metal fence posts are sequenced around the electrician's bonding inspection. The Licensed Electrical Contractor and ESA decide the specifics for your pool.

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Covered inground pool in a backyard with melting snow and wet ground in early spring

Can a Fibreglass Pool Pop Out of the Ground?

Yes, if it is drained while groundwater is high. AQUA Magazine notes that a couple of inches of differential head can float a fibreglass shell. Risk peaks during snowmelt and storms. Builders typically set an 8 in groundwater pipe in the deep end, and a fibreglass pool should never be fully drained. Correct winter closing keeps water in the pool.

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Commercial guides

Newly installed shrubs, staked young trees, mulch beds and fresh sod along a walkway beside a low-rise commercial building

Hamilton Landscape Securities: How Release Works on Site Plan Projects

The City holds landscape securities until it's satisfied the approved landscape works are built and the planting has established. Release timing and conditions, such as inspections, sign-off and any partial reductions, are set by your site plan agreement. Confirm them with the City.

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Compact excavator loading excavated soil into a tandem dump truck beside a soil stockpile on a fenced commercial site

Ontario Excess Soil Rules for Small Commercial Sites (O. Reg. 406/19)

Under O. Reg. 406/19, the project leader — usually the owner or developer — has the main duties.

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Wide concrete walkway with a curb ramp and tactile warning plate leading to the entrance of an institutional building

AODA Exterior Paths of Travel: A Contractor's Checklist for Ontario Sites

These rules cover new or redeveloped outdoor paths. They apply to public-sector organizations, and to businesses and non-profits with 50 or more employees. Covered paths need at least 1,500 mm of clear width (1,200 mm at a curb-ramp turning space). A running slope (along the path) no steeper than 1:20, or it must be designed as a ramp. A cross slope (side to side) no more than 1:20 on asphalt and concrete (we treat concrete pavers and slabs the same way) — 1:10 on other surfaces such as compacted aggregate. A firm, stable, slip-resistant surface. Openings no larger than 20 mm. At least 2,100 mm of headroom.

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Steel trench box protecting an open utility trench on a commercial site, with the soil pile set back and a mini excavator nearby

Notice of Project & Trench Rules for Commercial Landscape Work in Ontario

You generally need a Notice of Project if any of these is true: Labour and materials will cost more than $50,000. A trench workers may enter is more than 300 m long. A trench workers may enter is more than 1.2 m deep and over 30 m long. The project involves an earth-retaining structure more than 3 m high. Workers can't enter an excavation deeper than 1.2 m unless its walls are sloped, shored or protected by a trench box. Keep spoil (dug-out soil) and equipment at least 1 m back from the edge.

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Paige-wire tree protection fencing around a mature tree at the edge of a development site, with a newly staked young tree in the foreground

Tree Planting & Protection Rules for Hamilton Development Sites

In Hamilton, the City's Forestry Section plants street trees in the road allowance once final grade is reached. The developer pays for them. On private land, trees 10 cm DBH or larger removed for development need 1-for-1 compensation or cash-in-lieu. Protect existing trees with Paige-wire fencing at least 1 m beyond the dripline. On public land, follow the City forestry manual for soil volume, species diversity and planting windows.

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Salted commercial entrance walk beside a storefront, with snowbanks along the curb and a patch of refrozen ice under a downspout

Ontario's 60-Day Notice for Snow and Ice Injuries: A Property Manager's Guide

Since January 29, 2021, a person injured by snow or ice on private property in Ontario generally can't sue the occupier or its snow contractor unless written notice is served within 60 days. The notice must state the date, time and location of the incident and be served in person or by registered mail. Whoever receives it must pass copies to the other occupiers and contractors. It's a notice rule, not immunity.

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Plowed commercial parking lot with snow piled along the perimeter in front of an office building on an overcast morning

Commercial Snow Removal Contracts in Ontario: Seasonal, Per Event, Per Push or Hourly?

Seasonal contracts give the most budget certainty and, according to Ontario procurement guidance, the best incentive to use less salt, though you may pay more in a light winter. Per-event and per-push contracts track the actual winter but make budgets less predictable. Hourly or time-and-materials billing, including paying by the bag or tonne of salt, can encourage using more salt than needed.

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Dense mown turf and mulched shrub beds beside a commercial office building, with a tight-jointed paver walkway

Ontario's Cosmetic Pesticide Ban: What It Means for Commercial Grounds

Ontario bans most pesticides for cosmetic use on lawns, gardens, patios, driveways, parks and schoolyards, including on commercial properties. Only products whose active ingredients are on the province's Allowable List can be used for appearance. Exceptions include health and safety, such as poison ivy and giant hogweed. The most reliable weed control is dense turf and good bed care.

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