Every April I watch the same movie play out across the GTA. Snow melts, the backyard thaws, someone calls a patio crew, a Bobcat shows up, pavers go down, and eighteen months later the whole thing is tilting toward the house and pooling water at the basement wall. The pavers didn’t fail. The yard underneath them did.
If you’re planning a backyard project this season, here’s the part most homeowners don’t hear until it’s too late: on a typical GTA lot, grading and drainage have to be resolved before a single paver gets laid. Not after. Not “we’ll see how it drains.” Before.
Why this order matters so much in Toronto specifically
Our soils are clay-heavy, our lots are tight, and most of the older GTA neighbourhoods were graded back when drainage expectations were different. Add our freeze-thaw cycles and it’s a perfect recipe for a patio that heaves, settles, or pushes water toward your foundation.
Industry reality: excavation, base prep, grading, and drainage typically account for 50-70% of a hardscaping project’s real cost. That’s not the fun part you see in the final photos, and it’s exactly where cheap quotes cut corners.
The right order of operations
Here’s how we actually sequence a backyard build:
- Assess current drainage - where is water moving now, and where does it pool after a heavy rain?
- Fix the grade - the yard should slope away from the house at roughly a 2% minimum. On a 50 ft run that’s about a 12-inch drop.
- Install drainage if needed - French drains, swales, catch basins, downspout extensions. Permeable paving is an option on sites that qualify.
- Excavate for the hardscape base - usually 10-12 inches deep for a patio, more for a driveway.
- Compacted granular base, geotextile, bedding layer, pavers - in that order, with compaction at every stage.
- Plantings, lighting, accessories - last, once the hard stuff is locked in.
Skip step 1-3 and you’re buying yourself a repair bill. A 200 sq ft backyard patio runs roughly $4,000-$6,000 installed when done right. The same patio ripped up and redone in year three usually costs more than the original because you’re paying for demo, disposal, and a full rebuild.
A few things homeowners often miss
- Disposal fees are real money. Toronto-area tipping fees are running around $160-$170 per tonne, and a 500 sq ft patio can easily generate 30 tonnes of waste. That can be $4,000-$5,000 of your budget right there. Ask your contractor how they’re pricing disposal.
- Permits: A ground-level patio usually doesn’t need a building permit in Toronto. But raised patios, pergolas, roofed structures, or any gas/electrical work absolutely do. Don’t guess - call 311 or check your municipality’s site.
- Drain-connected work needs a licensed drain contractor in the City of Toronto. If your project touches municipal drainage, your contractor needs to be licensed for it. Ask to see the license.
- Access cost. A Bobcat-accessible yard is dramatically cheaper than one where every bag of stone has to come through the house. Price this in early.
When to book
The good crews in the GTA are already filling their late-May and June calendars. If you want work done before mid-summer, the call to make is this week or next. Waiting until the first long weekend in May usually means pushing into August.
Quick answers for Toronto homeowners
Why does grading and drainage have to come before the patio?
In the GTA, clay-heavy soil, tight lots, and freeze-thaw cycles will heave or tilt a patio within two or three winters if the water has nowhere to go. Fixing the yard first is cheaper than ripping up pavers later.
What does a proper 200 sq ft backyard patio actually cost here in 2026?
Roughly $4,000-$6,000 installed when the full sequence (survey, grading, drainage, excavation, compacted base, bedding, pavers) is done properly. Ripping it up and redoing it in year three usually costs more than the original because you’re paying for demo and disposal on top of a full rebuild.
When should I book if I want the work done before mid-summer?
This week or next. Good GTA crews are already filling their late-May and June calendars. Waiting until the first long weekend in May usually pushes the job into August.
Why are disposal fees such a large line item in Toronto?
Tipping fees in the GTA are running $160-$170 per tonne and a 500 sq ft patio can easily generate about 30 tonnes of waste, which puts disposal alone in the $4,000-$5,000 range on a mid-size project.
A few threads here that go deeper on specific pieces:
- The 12-inch rule: why most Toronto interlock patios fail by spring covers base depth specifically.
- Our Most commonly asked Questions thread is where new homeowners usually start.
Open question for the group: what’s the one backyard mistake you watched a neighbour make that you’d warn the rest of us about? Drainage, contractor red flags, paver choice, timing - whatever surprised you. Drop it below and we’ll collect them into a proper checklist for the season.
And if you’re planning something big and want a second set of eyes on the scope before you start collecting quotes, post the details in Hire a Trade and we’ll weigh in.
- Admin, 50+ years building in the GTA. If Samm’s 251 KM charity run comes up in the thread, it’s at https://sammsimon.ca - the run is on to raise funds for the London Health Sciences Cancer Program, Stratford General ER, and Wellspring Stratford.