About — Astonia Landscaping

Our Story

From humble beginnings in 1975 to the GTA's trusted name in outdoor craftsmanship.

Astonia Landscaping has provided homeowners with quality landscape design and stone masonry for five decades. We started completing porches and walkways — today we build patios, pools, outdoor kitchens, fireplaces, water features and full landscape transformations.

We pride ourselves on delivering the expertise of a big company while keeping the warmth of a family business. Every project balances aesthetics with function, built to last for generations.

Meet the maker

Est.
1975

Meet James Dennison

A third-generation stonemason — passionate about design, function and stone that lasts.

James' passion for landscaping and heavy equipment began as a young boy, on job sites with his father and grandfather. He understands the value of selecting high-quality materials, ensuring every project is built to last.

Owner-led. Daily communication from start to completion.
Own equipment. Small and heavy machines for true efficiency.

Let's talk about your project

The Astonia difference.

What it means to hand a once-in-a-generation project to a family that has done this since 1975.

Owner-led

Daily communication from James, from the first handshake to the final reveal.

Our own equipment

Small and heavy machines, run by our own crews — no subcontractor delays.

No unsightly bins

We haul every bit of debris away in our own trucks, every day.

$5M insured

Liability coverage above the industry average, for your peace of mind.

WSIB covered

A fully covered, professional crew on every project.

Unilock Authorized

Warranty-grade materials and professional installation standards.

The outdoor space your family never wants to leave.

Book a free on-site consultation. We design, build and plant the whole space — then haul it all away when the last stone is set.

Book a Consultation Call 416 · 791 · 6523

$5M insured · WSIB-covered crews · 3rd-generation craftsmanship since 1975