"Working with James was great from the beginning. He put my mind at ease with his product knowledge and his creative designs."
GTA · Service Area
Landscape design & stone masonry in Vaughan.
Astonia Landscaping designs and builds high-end residential landscapes and natural-stone masonry across Vaughan, in the GTA. The work is owner-led by a third-generation stonemason whose family has been building in stone since 1975. We run our own crews and our own equipment, keep the site clean and orderly throughout, and stay in daily contact from the first site walk to the final planting — the same way we work everywhere we build.
- Since 1975
- 3 Generations
- $5M Insured
- WSIB Covered
- Design-Build
In Vaughan
Landscaping that belongs in Vaughan.
Vaughan sits in York Region and spans two very different kinds of property, and a serious landscape has to answer to both. In Kleinburg you find large estate lots with mature trees, real grade, and the older character of the Humber valley — land that rewards a measured plan and stonework that looks like it has always belonged there. We read the existing trees, the slope, and the way water already moves across the site before a single line is drawn, so the design works with the property rather than fighting it.
Much of the rest of Vaughan — through Thornhill, Woodbridge and the newer luxury enclaves — is newer construction on generous but blank, freshly graded lots. Homeowners here have built or bought the house they intend to keep, and they want the backyard finished to match it: one cohesive design rather than a patio this year and a pool the next. That suits how we work. Our designer measures the space in person and renders it in 3D so you can see the whole outdoor space before we break ground, and because we own our small and heavy equipment, the build runs on our schedule, not a subcontractor's.
What Vaughan homeowners tend to value most is restraint and permanence — natural stone, clean grading, and planting that grows into the property over the decades they plan to live there. This is usually a once-in-a-generation investment, and it is treated that way: $5 million in liability insurance, WSIB-covered crews, a clean and orderly site throughout, and an owner who answers for the work himself.
How it works
From first handshake to final reveal.
01
Initial Consultation
We meet you on-site to walk the space, understand how you want to live in it, and talk through your vision and investment — no obligation.
02
Design & 3D Review
Our designer measures and plans your space, then renders it in 3D so you can see it before we break ground. We refine every detail together.
03
Breaking Ground
Our own crews and equipment start at 7:00 AM, keep the site clean every day, and brief you each morning and evening — no subcontractor gaps, no delays.
04
Project Completion
After a final walkthrough, the only thing left behind is your finished space — built to gather on for generations.
The Astonia difference
Why homeowners in Vaughan choose us.
Owner-led
Daily communication from the owner, 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.
Kind Words
Homeowners across the GTA, on the Astonia experience.
Five decades of referrals across the GTA & Durham. Read more on Google& Houzz.
"The natural stone work and landscape job that James and his crew did is beautiful, outstanding work. The quality is outstanding — we would recommend this company to anyone."
"Astonia was a delight from start to finish. The crew showed up early and worked long days to finish on time. We are now enjoying the most amazing front yard. Outstanding results!"
"As a repeat client, we selected Astonia to transform our simple backyard into a relaxing space amongst a natural setting that will bring us many years of pleasure."
Good to know
Landscaping in Vaughan, answered.
We design and build across the GTA & Durham region — including Toronto, Etobicoke, Mississauga, Brampton, Oakville, Vaughan, Markham, Newmarket, Aurora, King City, Whitby, Oshawa, Bowmanville and the surrounding areas.
Every project is different — from focused stonework to a full landscape transformation — so we provide a clear, detailed proposal after an on-site consultation rather than a generic price. Most of our work is a meaningful, lasting investment in your property.
Timelines depend on scope, and you receive a realistic one at the design-review stage before we break ground. Because we own our equipment and run our own crews, we work efficiently — starting at 7:00 AM and keeping the site clean every day.
Yes. We carry $5 million in liability insurance — above the industry average — and our crews are fully WSIB covered.
Yes. Our designer visits your home to measure and plan the space, then renders your project in 3D so you can see it before any work begins. We review and refine it together until it is right.
Often, yes. We build alongside landscape designers, architects and major pool builders across the GTA, and we can also design and build the whole project in-house. Either way you deal with one accountable crew from the first site walk to the final planting.
Astonia is led by James Dennison, a third-generation stonemason with five decades of craft. You get the expertise of a large company with the warmth and accountability of a family business, owner-led from start to finish.
Your Vaughan project starts here.
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.
$5M insured · WSIB-covered crews · 3rd-generation craftsmanship since 1975