The fix for a wet backyard is to move water somewhere on purpose. Good backyard drainage solutions combine surface grading that slopes away from the house, swales to channel runoff, downspout extensions, and a French drain to carry water underground. The heavy work, regrading and trenching, is site grading and drainage excavation done to the right depth.
Why Water Pools in a Backyard
Standing water is almost always a grading problem first. If the ground around your house is flat, or worse tilts back toward the foundation, rain and snowmelt have nowhere to go. It sits, soaks in, and works toward the lowest point it can find, which is often the basement wall. Three things make it worse in our area:
- Heavy clay: common on the Mountain and around Ancaster, clay holds water instead of draining it, so puddles linger for days.
- Freeze-thaw: southern Ontario winters freeze saturated soil, then thaw it, heaving and settling the ground and opening new low spots every spring.
- Downspouts dumping at the foundation: a roof sheds a lot of water, and if it lands in a splash zone a couple of feet from the wall, that is gallons pooling exactly where you do not want it.
The goal of every fix below is the same: give the water a planned path away from the house, to a spot where it can drain or daylight safely, without sending it onto the lot next door.
Step One: Yard Grading for Drainage
Before you trench anything, fix the surface. Yard grading for drainage means shaping the soil so it falls away from the foundation in every direction. The standard builders work to is a noticeable drop over the first few feet out from the wall, then a gentler continuous slope across the yard toward wherever you want the water to end up.
Regrading is the highest-value drainage work there is, because it solves the problem at the surface before water ever reaches a pipe. On a tight older lot in Dundas or downtown Hamilton, where backyards are small and hemmed in, even a modest regrade can stop a chronic wet corner. One rule never bends: grading has to move water away from your house, and it cannot dump runoff onto a neighbour's land. That is not just good manners, it is the law in Ontario, and on new builds the city requires grading to follow an approved lot-grading plan.
Swales: Shallow Channels That Steer Water
A swale is a shallow, gently sloped channel cut into the lawn that collects runoff and carries it where you want it to go. From the surface it just looks like a soft dip in the grass. Underneath, it is graded to a consistent fall so water always moves in one direction instead of pooling.
Swales are the workhorse of surface drainage. We use them to take water from the high side of a yard, around a patio or shed, and out to a low corner, a rear ditch, or a French drain inlet. On a sloped escarpment lot, a swale can intercept water running downhill before it ever reaches the house. Done right, you mow over it and never think about it again.
Downspout Extensions: Check These First
Before anyone digs, look at where your downspouts end. If they discharge right at the foundation, extending them is often the single biggest improvement you can make, and it is the simplest. The job is to carry roof water well away from the wall, to a spot that drains, so it is not feeding the puddle you are trying to get rid of.
Extensions can run above grade, or for a cleaner look, underground in a buried pipe that daylights out in the yard or ties into a drainage line. Either way the principle holds: get the roof water past the splash zone and onto a graded path away from the house. We always sort the downspouts out as part of any drainage plan, because there is no point trenching a French drain while the roof keeps dumping at the wall.
French Drains and Weeping Tile
When the surface alone cannot move enough water, or the water is already in the ground, you go subsurface. A French drain for a backyard is a trench filled with clear stone around a perforated pipe, the weeping tile. Water in the soil follows the path of least resistance into the stone, drops into the pipe, and the pipe carries it off to a lower outlet.
The details are what make it last:
- Clear stone bedding: the pipe sits in washed clear stone, not fine gravel or native soil, so the line does not silt up and clog.
- Consistent fall: the pipe is graded so water keeps moving to the outlet by gravity, never sitting flat.
- A real outlet: the line has to daylight or tie into somewhere that actually drains, not a dead end.
The same approach handles a wet foundation. Weeping tile bedded in clear stone around the footing collects groundwater and routes it away before it can sit against the wall. On heavy clay, where water has nowhere else to go, a properly bedded subsurface drain is often the difference between a dry yard and a swamp.
How We Fix Backyard Drainage
Every wet-yard job follows the same order, because the steps build on each other. To fix backyard drainage properly we:
- Read the water: walk the lot, find the high and low points, and trace where water comes from and where it wants to go.
- Book the locates: we request locates through Ontario One Call before any machine touches the ground.
- Fix the surface first: regrade away from the house, cut swales, and sort out the downspouts.
- Add subsurface drainage where needed: trench and bed a French drain or weeping tile in clear stone, running to an outlet that drains.
- Grade to finish and clean up: final grade, restore the surface, and haul off the spoil so the yard is left clean.
We do the digging ourselves and dig to the right depth, because a drainage system is only as good as the trench it sits in. Skip the fall, skip the clear stone, or skip the outlet, and you have buried a pipe that does nothing.
Locates and Conservation Authority Permits
Two legal points matter before any drainage dig in the Hamilton area.
First, locates. Anyone digging in Ontario must request locates from Ontario One Call before breaking ground, homeowner or contractor, a single post hole or a full trench. The request is free, and digging without it is an offence. We book it on every job.
Second, conservation authorities. If the work is near a watercourse, floodplain, wetland, shoreline, or steep slope, you may need a permit under Ontario Regulation 41/24 before any site alteration. Which authority depends on the town: the Hamilton Conservation Authority covers Hamilton, Ancaster, Dundas and Stoney Creek; Conservation Halton covers Waterdown and Burlington; the Niagara Peninsula Conservation Authority covers Grimsby; and the Grand River Conservation Authority covers Brantford. If your yard backs onto a creek or sits below the escarpment, we confirm whether a permit applies before we break ground.
Frequently Asked Questions
What is the cheapest way to fix backyard drainage?
Start with the simple things. Extend your downspouts away from the foundation and check the surface grade. A surprising number of wet yards are caused by roof water dumping at the wall and a lawn that slopes the wrong way. Regrading and swales fix it at the surface, before you ever pay for a buried pipe.
Do I need a permit for a French drain in my backyard?
A plain landscaping drain usually needs no building permit, but two rules still apply. You must request free locates through Ontario One Call before digging, and if the work is near a creek, wetland, floodplain or steep slope, the local conservation authority may require a permit under Ontario Regulation 41/24. We confirm both before we start.
French drain or grading: which comes first?
Grading comes first, always. Surface water is easiest and cheapest to move with shape, so we regrade away from the house and add swales before considering a buried drain. A French drain handles the water that grading alone cannot reach, like groundwater trapped in heavy clay. Put in backwards, a French drain just buries a surface problem.
Wet Backyard in the Hamilton Area? Let's Move That Water.
Drainage is grading, digging, and getting the fall right, which is exactly the excavation work we do every day. The Hammer Construction is a Hamilton-based crew, licensed and insured. Get a free quote at our online estimator, call or text (647) 424-1148, or email hello@thehammer.construction