The City of Trois-Rivières, faced with a housing crisis similar to that of many other Quebec municipalities, is now accepting ADUs.
Here’s all you need to know about setting up a Go-Box as a ADU in your backyard!
What is a ADU?
A ADU, or accessory dwelling unit, refers to an additional dwelling on the same lot as a single-family home, but detached from it. It may be located in the secondary front, side or rear yard, and may also be juxtaposed or superimposed on an accessory building.
Urbanization perimeter: where can I add a ADU?
ADUs are only permitted within urbanization perimeters, provided they are linked to a principal dwelling. Outside urbanization perimeters, only intergenerational housing is permitted as a complement to single-family detached dwellings, in order to preserve the rural and agricultural character. Here’s a map to help you locate where you could install a Go-Box:
Important areas to be respected
Minimum lot size: 7,535 ft² (700 m²)
Minimum area of additional dwelling: 323 ft² (30 m²)
Maximum area of additional dwelling: 1,076 ft² (100 m²) not exceeding 60% of the main building’s floor area (above ground).
Our L and H models meet this requirement perfectly.
The main steps in applying for a permit
Step 1: Permit application (Permits portals)
Step 2: Demand study and analysis
Step 3: Submission of a conditional use request to the CCA
Step 4: City Council approval
To ensure harmonious integration into the urban landscape, all ADU projects must receive prior approval from the City Council. These units are subject to a “conditional use” application, allowing each proposal to be evaluated according to specific criteria, including architectural harmony with the main residence and effects on the neighborhood.
Step 5: Permit issuance
Step 6: Construction of additional accommodation
Main ADU design criteria
Architectural harmony
The style of the ADU and its materials must match those of the main house, while preserving the appearance of a single-family dwelling. The ADU must also fit naturally into the neighbourhood, both in terms of location and size, in order to enhance the urban landscape and preserve the area’s identity.
Compact design
The size of the ADU must remain proportional to that of the main house. It must be smaller in both height and surface area, within the limits set by regulations. This approach ensures discreet integration and harmonious visual balance within the built environment.
Respect for privacy and neighbors
When setting up a ADU, it’s crucial to limit the impact on the neighborhood. Care must be taken to preserve light, views and the peace and quiet of nearby residents. Respecting setbacks, adding landscape elements (such as hedges or trees) and carefully positioning openings all contribute to respectful integration, promoting harmonious cohabitation.
Environmental approach
The development of a ADU can increase the amount of impervious surfaces, which is why an environmentally-friendly approach is so important. It is advisable to retain mature trees and use sustainable solutions such as rain gardens to limit runoff. Revegetation of setbacks and the use of permeable materials promote stormwater management, protect ecosystems and enhance privacy while improving aesthetics.
Other applicable conditions (foundation, connection, etc.)
The following provisions also apply to accessory dwelling units:
- An integrated accessory dwelling unit must comply with any standards applicable to a main building;
- All detached accessory dwellings must be built on a permanent, frost-free foundation. In the case of a pile foundation, the finished floor must be a maximum of 60 cm above ground level, and the space below floor level must be covered with a cladding material authorized in the zone;
- All accessory dwelling units must be connected to the municipal water and sewer systems and use the same service entrance as the main building;
- Isolated accessory dwelling units may have a separate service entrance for the electrical network;
- Cellars and basements are prohibited for detached accessory dwelling units;
- A detached accessory dwelling unit may include a raised living platform that does not occupy the entire floor area. This area is not counted as part of the floor area of the accessory dwelling and is not considered a storey;
- An additional off-street parking space may be provided for an accessory dwelling unit, provided all parking and landscaping standards are met;
- All accessory dwelling units must have a building number visible from the street.
Conclusion
This article provides a general overview of the regulations governing additional housing in Trois-Rivières. For advice tailored to your project, we recommend that you consult your municipal services, who will be able to help you plan your project according to your specific needs.
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Source: Ville de Trois-Rivières