Item 7 — Changes to Backyard Suite Rules

Here is Item 7 rewritten with only H2 and H3:

Item 7 — Changes to Backyard Suite Rules

Understanding what changed, why it happened, and what both sides say about it

What Is a Backyard Suite?

The Basic Definition

A Backyard Suite — also called a laneway suite, carriage house, garden suite, garage suite, or casita — is a self-contained dwelling unit located in a detached building at the rear of a residential property. It is separate from the main house but sits on the same lot.

What It Must Contain

To qualify as a Backyard Suite under the bylaw a unit must include all of the following:

• One or more rooms used as a residence

• A kitchen or kitchenette

• Living space

• Sleeping space

• Sanitary facilities

How It Differs From a Secondary Suite

A Secondary Suite is located inside the main building, typically in the basement. A Backyard Suite is located in a separate detached building at the rear of the lot. Both are considered secondary to the main dwelling unit on the property.

What Changed

Before the Bylaw

The old rules required a Backyard Suite to be located on the same parcel as either:

• A Contextual Single Detached Dwelling, or

• A Single Detached Dwelling

With limited exceptions for specific districts this meant Backyard Suites were only permitted alongside a conventional single family home.

After the Bylaw

The new rules state that a Backyard Suite must not be located on the same parcel as either:

• A Rowhouse Building, or

• A Townhouse

The framing shifted from a positive requirement — must be with a single family home — to a negative restriction — must not be with a rowhouse or townhouse. Everything not explicitly excluded is now potentially permitted.

The Change to Subsection 354

The bylaw also amended subsection 354 to allow one Backyard Suite per bare land unit in the R-CG and R-2M districts. Bare land units are the individual parcels created when a lot is subdivided. The practical effect is that a Backyard Suite can now be associated with a wider range of dwelling types and lot configurations than before.

Why Did the City Make These Changes?

Increasing the Overall Housing Supply

Backyard Suites represent a relatively gentle form of density. A Backyard Suite adds one dwelling unit to a property without fundamentally altering the street-facing character of the lot. The main house remains at the front. The suite sits at the rear, often behind a fence or mature landscaping.

Making Efficient Use of Existing Lots

Many Calgary residential lots have underutilised rear yard space. Backyard Suites make productive use of that space by adding a dwelling unit without requiring new land, new streets, or significant new infrastructure.

Supporting Different Household Needs

Backyard Suites serve a range of household needs including:

• Rental income for homeowners

• Accommodation for aging parents or adult children

• Affordable rental housing for tenants

• Mortgage helpers that make homeownership more accessible

Alignment With Broader Policy Goals

Expanding Backyard Suite permissions is consistent with the City's broader goal of increasing housing diversity and supply in established neighbourhoods. It also aligns with provincial direction encouraging municipalities to reduce barriers to housing.

What Are the Concerns About This Change?

Cumulative Density

Under the new rules a single lot in R-CG could theoretically contain:

1. A main dwelling unit

2. A Secondary Suite in the basement of the main dwelling

3. A Backyard Suite in a detached building at the rear

That is three dwelling units on a lot that previously permitted one. The cumulative effect across multiple properties on a single street is significant in terms of parking demand, traffic, waste collection, and overall neighbourhood character.

Parking Pressure

Each additional dwelling unit generates additional parking demand. The bylaw's parking requirements were reduced at the same time that suite permissions were expanded. Critics argue that the combination of more units and fewer required parking stalls will shift significant parking pressure onto surrounding residential streets.

Infrastructure Capacity

Adding dwelling units to existing lots increases demand on water and sewer infrastructure, waste collection, and other services. Critics argue that the cumulative infrastructure impact of widespread Backyard Suite development across established neighbourhoods has not been adequately assessed.

Loss of Private Green Space

Backyard Suites occupy rear yard space that currently functions as private green space, garden area, and tree canopy. In established Calgary neighbourhoods that rear yard space contributes to stormwater management and urban cooling. Critics argue that widespread rear yard development will have cumulative environmental impacts that are difficult to reverse.

The Framing Shift Matters

The shift from a positive requirement to a negative restriction is not merely technical. A positive requirement establishes a clear default. A negative restriction establishes permissiveness as the default and restriction as the exception. Critics argue this signals a broader philosophical change in how the City approaches residential density.

What Does This Mean in Practical Terms?

For Homeowners Considering a Backyard Suite

• The permissions are now broader and the pathway to approval is more straightforward

• A Backyard Suite can now be associated with a wider range of dwelling types and lot configurations

• The process for approval depends on the specific district and use classification

For Homeowners Concerned About Density

• A neighbouring property can now potentially accommodate three dwelling units

• The cumulative effect of this across multiple properties on a street represents a significant density increase

• The combination of a main unit, a Secondary Suite, and a Backyard Suite on a single lot is now more widely permissible

For Renters

• Expanded Backyard Suite permissions increase the supply of rental units in established neighbourhoods

• Backyard Suites tend to be smaller and more affordable than purpose-built rental apartments

• They offer rental options in neighbourhoods that previously had limited rental supply

Key Facts

• What changed: The framing of Backyard Suite location rules shifted from a positive requirement to a negative restriction, and one Backyard Suite per bare land unit was permitted in R-CG and R-2M districts

• Sections amended: Subsections 153.1 and 354 of Land Use Bylaw 1P2007

• What a Backyard Suite cannot be located with: A Rowhouse Building or a Townhouse

• Maximum units now possible on a single R-CG lot: One main dwelling unit + one Secondary Suite + one Backyard Suite = three dwelling units

• The City's argument for the change: Increasing housing supply through gentle density that makes efficient use of existing lots

• Primary concern among critics: The combination of expanded suite permissions and reduced parking requirements creates cumulative density and parking impacts that are difficult to reverse

Read the full bylaw: calgary.ca

See the related proposal: [Link to Item 7 Proposal — insert once created]

Next: Item 8 — Parking Requirement Changes →