About — Astonia Landscaping

Our Story

From humble beginnings to the GTA's trusted Design-Build Landscape Company

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 craftsman combining traditional expertise with modern design to create outdoor spaces that are both beautiful and built to last.

James' passion for landscaping began at an early age, working alongside his father and grandfather on job sites. Today, he combines generations of experience with modern construction techniques to deliver exceptional outdoor living spaces. From the first consultation to the final walk through, every project is approached with craftsmanship, attention to detail and a commitment to quality that lasts

Owner-led. Direct communication from consultation through project completion .
Own equipment. Built with our own equipment. A complete fleet of professional machinery ensures efficacy, precision and quality control.

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.

Built to last

Overbuilt foundations and natural stone, meant to hold their line for generations.

$5M insured

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

WSIB covered

A fully covered, professional crew on every project.

Design-build in-house

One team designs, builds and plants — no trades to chase.

The outdoor space your family never wants to leave.

Book a free on-site consultation. We design, build and plant the whole space — one accountable crew from the first site walk to the last stone set.

Book a Consultation Call 416 · 791 · 6523

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