Streetsville, Mississauga. Since 2011.
The base is the job.
We are a design-build landscape contractor with one crew and the owner on every job. We put eight inches of compacted Granular A under a patio and twelve under a driveway, because GTA clay heaves and stone only stays flat when what is under it is built properly.
One backyard, five stages, one camera
Scroll and a Streetsville backyard builds itself, shot from the same corner of the yard from bare clay to the first evening with the lights on. Watch the second frame closely. It is the part that decides whether the patio is still flat in ten years, and once the stone goes down nobody ever sees it again.
- String lines on bare clay.Stakes set to the drawing, and the grade checked to fall 2 to 3 percent away from the house in the first 2 metres.
- Eight inches you will never see.Geotextile over the clay, Granular A compacted in lifts, an inch of HPB bedding on top. No limestone screenings.
- Stone laid on a flat base.60 mm pavers on the patio, the wall stepped into the slope, every joint swept and plate-compacted.
- Planting that can take August.Beds of triple mix, sod rolled the same week, trees sized for the yard they are going into.
- Still flat in ten years.Lights along the walk, the wall and the steps. The part under the stone is why it will still look like this.
Three kinds of work. One crew.
Hardscape, planting and the whole yard together. The owner is on every job, and the base under the stone is never subcontracted.
Patios, walkways and walls
Interlock and natural stone on a base built for frost-susceptible clay: geotextile, compacted Granular A, HPB bedding, never screenings.
How we do it
Gardens, sod and trees
Planting beds, sod and trees chosen to survive a summer like 2025, scoped around the tree bylaws before anyone picks up a spade.
How we do it
The whole backyard
Design, drainage, stone, planting and lighting by one crew, with the design fee credited to the build.
How we do it
Front yards
The walk you stop apologising for.
Cracked asphalt, a lawn that gave up, junipers past the window sills. Six seconds later it is a 60 mm interlock walk on a compacted base, armour stone steps set into the grade instead of perched on it, and planting chosen for a dry summer. The front walk is the first thing every visitor stands on.
Since 2011
It started with a trailer and a plate compactor.
Daniel Kowalczyk started Hollowmere in Streetsville in 2011 and is still on every job. The name got around after the December 2013 ice storm, when the crew spent the weeks after Christmas clearing broken limbs out of yards across the village. Much of the work since has been rebuilding patios that someone else laid on limestone screenings. That is where the rule comes from. The base is the job.
Where we build.
We are based in Streetsville and build across Mississauga, Oakville and Milton, with Brampton on request. One crew means one build at a time, so we keep the work within a short drive of the yard.
Mississauga
Home. Streetsville, Lorne Park, Mineola, Erin Mills, Lakeview and Churchill Meadows, from post-war cottages to new tight lots.
Oakville
West on the QEW and 403. Old Oakville, Glen Abbey, Bronte, Morrison and Joshua Creek, with a tree bylaw that tightened in 2024.
Milton
North-west on the 401 and 407. Old Milton's 19th-century core and street after street of newer subdivisions with bare backyards.
Send us the yard
Call or write with the street and what you want fixed. We will come and measure, check the grade and the trees, and tell you what the base will take before we talk about stone.
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