Accessory dwelling units (ADU) are small homes that can be built in the backyards of larger homes, in cities where they’ve been approved.
They’re also sometimes known as carriage, coach, or laneway houses.
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ADU’s… Today’s Loophole for Building Small Homes Legally

Image © Colin Perry and Lanefab
These small homes are typically around 700-1000 square feet in size, although the size sometimes has to be calculated as a percentage of the size of the yard.

Image © Colin Perry and Lanefab
Adding new homes in potentially underused backyard spaces is a sustainable way to provide more housing options in walkable urban neighbourhoods where people don’t need to use cars to get around for every errand. ADUs can also help reduce urban sprawl by reducing the need for cities to grow outwards (which increases pollution from transportation).
To find out if ADUs are legal in your city, check out this website (US only):
https://accessorydwellings.org/adu-regulations-by-city/
VIDEO: The Accessory Dwelling Unit for Sustainable Urban Living
Additional Resources:
- Accessory Dwelling Unit Regulations by City
- Accessory Dwelling Units in Vancouver, BC
- Lanefab Laneway Houses in Vancouver, BC
- RISE Sustainable Home Improvements
- Exploring Alternatives
Our big thanks to Marcus for sharing!🙏
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