Theoutdoorspaceyourfamilyneverwantstoleave.

We design and build across the GTA & surroundings areas — if you're not sure about your area, just ask.

Every project is different — from focused stonework to a full landscape transformation — so we don't quote a number until we understand your space and vision. After an on-site consultation we provide a clear, detailed proposal with no surprises. Our work is a meaningful, lasting investment in your property.

Every project is unique and timelines vary based on size, complexity, weather, permit approvals and material availability. Before construction begins, we'll provide a detailed project schedule so you know what to expect every step of the way. Our team is committed to staying on schedule while maintaining the highest standards of quality.

Yes. We carry $5 million in liability insurance — above the industry average — and our crews are fully WSIB covered. 

We do. Our designer visits your home to measure and plan the space, then renders your project in 3D so you can see it brought to life before any work begins. We review it together and refine every detail until it's right.

Often, yes. We build alongside landscape designers, architects and our pool builder/partner Gibson Pools. 

Astonia is led by James Dennison and sons, a third-generation stonemason with decades of craft behind him. You get the expertise of a large company with the warmth and accountability of a family business — owner-led communication from the first handshake to the final reveal.