Why Setbacks Matter Before You Choose A Plan
A plan that looks compact on paper can still fail on a real lot once side-yard clearance, rear-yard depth, window placement, and access are reviewed. Start with the zoning guide and this setback screen before you shop plans.
Rear Yard And Interior Side Yard Placement
Detached ARUs are generally tied to rear-yard or interior side-yard placement rules. That means the available buildable rectangle may be much smaller than the visible backyard suggests.
Why Side-Yard Windows Can Create Extra Spacing Issues
A side yard that first appears workable may need a larger separation once window placement and neighbouring-lot conditions are reviewed. This is one reason homeowners should avoid treating a quick tape-measure check as approval.
How Setbacks Interact With Lot Coverage And Open Space
Even when the setback path looks promising, the lot can still fail on lot coverage or open-space constraints. A detached ARU needs enough room to be placed legally and enough remaining site area to support the overall zoning picture.
A Compact Plan Can Still Fail On A Specific Lot
Small does not automatically mean easy. A compact plan may still struggle with access, trees, service routing, or the room needed to place the unit properly. Before comparing floor plans, review the CMHC plan guide and cost guide.
FAQ
Common questions, answered plainly
Can this page confirm my exact detached ARU setback?
No. This page is a preliminary screening guide. Exact setback treatment depends on the property, the design, and the applicable City review.
Screen The Lot Before You Choose The Plan
Run the London Backyard Audit to flag setback, lot-fit, and servicing questions before you spend money on drawings or a builder deposit.
Start The London Backyard Audit