SERVING TORONTO, THE GTA, AND MUSKOKA

with Ontario-wide reach for environmental projects

Stone’s Throw Design provides sustainable architecture services within a 2-hour radius and manages environmentally focused projects throughout Ontario.

AREAS WE SERVE

Sustainable Architecture in Toronto & the GTA

Designing Buildings with a Reduced Footprint, Greater Impact, and a More Sustainable Future.

At Stone’s Throw Design Inc., environmental responsibility isn’t an add-on — it’s the foundation of everything we do. We provide green architectural design within Toronto and all areas reachable within a two-hour drive, helping homeowners and businesses create spaces that dramatically reduce energy consumption, material waste, and long-term environmental impact.

We believe the built environment must do better. That’s why every project we design uses less energy, less material, and less carbon, all while enhancing comfort, livability, and beauty. From deep energy retrofits of older Toronto homes to multi-unit conversions that promote gentle density, your project becomes an opportunity to make a meaningful contribution to a more sustainable city.

For truly transformative, innovative, or carbon-conscious builds, we’re willing to travel anywhere in Ontario. Our passion for environmental design has taken us from Toronto to remote communities — including rammed earth homes, strawbale construction, and Indigenous-led CLT housing.

Who We Serve

Homeowners Who Want to Reduce Their Environmental Footprint

You want a home that uses far less energy, avoids unnecessary additions, and supports a healthier indoor environment. We help you achieve all of that through strategic design grounded in building science.

People Looking to Improve Existing Homes Responsibly

Deep energy retrofits are one of the most environmentally responsible choices you can make. We help you upgrade older buildings, so they perform like high-efficiency new ones — without the carbon costs of unnecessary demolition or expansion.

Clients Creating Multi-Unit Housing to Reduce Sprawl

We specialize in gentle density, turning single-family homes into multi-unit dwellings and designing garden suites or basement apartments. More housing within the existing urban fabric means less sprawl, less land consumption, and more sustainable communities.

Green-Minded Businesses

We support entrepreneurs who want their spaces to reflect their values — from low-energy studios to adaptive reuse of commercial buildings that prevent massive, embodied carbon emissions associated with new construction.

A Clearer Path to a Lower-Impact Future

Toronto homeowners face very real frustrations: high energy bills, weak building envelopes, drafty rooms, and confusing “green building” advice.

Our approach solves these issues by focusing on measurable environmental outcomes:

  • Lower operational energy use through super-insulation, airtightness, and high-performance windows
  • Reduced embodied carbon through material selection and using the smallest footprint possible
  • Minimal waste by improving and reusing existing structures
  • Improved indoor ecology through better air quality and healthier materials
  • Long-term resilience as climate conditions change

We don’t just make sustainable design possible — we make it easy.

Toronto’s Environmentally Focused Design Firm

We bring decades of experience and a proven record of pushing environmental boundaries:

  • First insulated rammed earth house in Ontario
  • First two-storey strawbale house approved in downtown Toronto
  • Successful green projects in dozens of jurisdictions
  • 10-year, 100% success rate at minor variance hearings
  • Advocacy that keeps your project moving, even when bureaucracy stalls

Every decision we make considers both the monetary and environmental costs. If there’s a way to reduce materials, footprint, carbon, or waste — we find it.

Our Toronto Service Area

Serving Toronto and all communities within a two-hour drive, including the GTA, Durham, Peel, Halton, York, Kitchener-Waterloo, Guelph, Southern Simcoe, and more.
For extraordinary, environmentally driven projects, we travel anywhere in Ontario.