Kamloops is undergoing a major shift in how housing is built. Rising costs, population growth, and new provincial legislation are driving a move away from traditional single-family homes toward small-scale multi-family housing like duplexes, triplexes, and fourplexes. In fact, provincial housing laws now require municipalities to allow three to four units on many lots that were previously limited to single-family or duplex use, dramatically expanding opportunities for this type of development.
The City of Kamloops has already begun adapting its zoning bylaws to support this change. Updates in 2024 introduced provisions allowing small-scale multi-unit housing on residential lots and reduced parking requirements to make these projects more feasible. These changes reflect a broader effort to increase housing supply, improve affordability, and create more diverse housing options for families, investors, and builders.
As a result, duplexes, triplexes, and fourplexes have quickly become some of the most important forms of new residential construction in the region.
WHY DUPLEXES AND FOURPLEXES ARE IN HIGH DEMAND
Small multi-family buildings offer several advantages over single-family homes. They make more efficient use of land, increase density without dramatically changing neighborhood character, and provide attainable ownership and rental options.
Provincial legislation now requires many single-family and duplex-zoned lots to allow up to four units, and in some cases even more near transit corridors. This means that lots once occupied by one home can now support multiple households, helping address housing shortages while maintaining the scale of low-rise neighborhoods.
For builders and property owners, this creates new opportunities to:
- Increase property value
- Generate rental income
- Provide more attainable housing options
- Maximize land efficiency
However, these benefits come with additional design, safety, and code requirements compared to single-family construction.
UNDERSTANDING BUILDING CODE CLASSIFICATIONS: PART 9 VS. PART 3
One of the most important differences between single-family homes and small multi-family buildings is how they are classified under the BC Building Code.
Single-family homes, duplexes, and small multi-unit buildings under three storeys and 600 m² fall under Part 9 of the Building Code, which covers housing and small buildings.
This means most duplexes, triplexes, and fourplexes in Kamloops are still considered Part 9 buildings—but they must meet additional requirements related to:
- Fire separation between units
- Sound control between dwellings
- Separate exits and egress
- Independent mechanical and electrical systems
Larger buildings exceeding those limits must comply with Part 3, which has more complex structural and safety requirements and typically requires professional engineering and architectural design.
FIRE SAFETY AND SEPARATION: A KEY DIFFERENCE
One of the biggest differences between single-family and multi-family housing is fire protection.
Each dwelling unit in a duplex, triplex, or fourplex must be separated by fire-rated assemblies designed to slow the spread of fire and protect occupants. The BC Fire Code establishes minimum requirements to provide acceptable levels of life safety in buildings.
This typically includes:
- Fire-rated walls and ceilings between units
- Fire-rated doors and protected openings
- Independent smoke alarms in each unit
- Fire stopping between floors and wall cavities
Single-family homes do not require this level of internal fire separation because they function as one dwelling.
SEPARATE ENTRANCES, SYSTEMS, AND SERVICES
Unlike single-family homes, each unit in a multi-family building must function as a fully independent residence.
BC building requirements commonly include:
- Separate entrances for each dwelling
- Independent plumbing and electrical systems
- Dedicated living, sleeping, and cooking areas
- Proper ceiling heights and emergency escape windows
These features ensure each unit is safe, functional, and compliant as a standalone home.
ZONING, PERMITS, AND MUNICIPAL REQUIREMENTS
Beyond building code, multi-family construction must also meet zoning and permit requirements specific to Kamloops.
The city regulates:
- Lot size and density
- Building height and setbacks
- Parking requirements
- Lot coverage and placement
All construction requires building permits and inspections to ensure compliance.
Additionally, multi-family projects such as stratified duplexes or townhomes require specific multi-family building permit applications.
These approvals help ensure new buildings meet safety standards and integrate properly into surrounding neighborhoods.
ENERGY EFFICIENCY AND BUILDING PERFORMANCE
Multi-family housing must also comply with modern energy efficiency standards.
The BC Energy Step Code establishes performance targets to improve insulation, air-sealing, and overall building efficiency.
This ensures new duplexes and fourplexes are:
- More energy efficient
- Less expensive to operate
- More comfortable for occupants
- Better for the environment
These standards apply to both single-family and multi-family construction, but become especially important when multiple households share a structure.
THE FUTURE OF HOUSING IN KAMLOOPS
The rise of duplexes, triplexes, and fourplexes represents one of the most significant changes in Kamloops’ housing landscape in decades.
Provincial legislation, local zoning changes, and increasing housing demand are transforming how residential neighborhoods are designed and built.
For builders, this shift creates exciting opportunities—but also requires a deeper understanding of building code, fire safety, and municipal regulations.
For homeowners and investors, small multi-family housing offers a powerful way to:
- Increase property value
- Generate income
- Contribute to solving housing shortages
As Kamloops continues to grow, duplexes and small multi-unit buildings will play a critical role in shaping the future of the city.
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The Rise of Multi-Family Housing in Kamloops: Building Code Requirements for Duplexes, Triplexes, and Fourplexes
Multi-family housing in Kamloops is rapidly becoming one of the most important trends in residential construction. As housing demand continues to grow and land becomes more valuable, duplexes, triplexes, and fourplexes are providing practical, cost-effective solutions for homeowners, investors, and developers. These small-scale multi-family buildings increase density while maintaining the character of existing neighborhoods, making them a key part of Kamloops’ future.
However, building multi-family housing is not the same as building a single-family home. Duplexes, triplexes, and fourplexes must meet specific BC Building Code requirements related to fire safety, sound separation, structural design, and building performance. Understanding these differences is essential for ensuring compliance, safety, and long-term value.
Why Duplexes, Triplexes, and Fourplexes Are Growing in Popularity in Kamloops
The demand for multi-family housing in Kamloops is being driven by several key factors, including population growth, rising home prices, and changes to zoning regulations. Many residential lots that were previously limited to single-family homes can now accommodate multiple units, allowing property owners to maximize land use and increase property value.
Duplexes and fourplexes offer several advantages:
- Increased rental income potential
- More efficient land use
- Lower cost per unit compared to single-family construction
- Greater housing affordability
- Strong long-term investment potential
For builders and developers, these projects represent a major opportunity—but they also come with additional construction and code requirements.
BC Building Code Requirements for Multi-Family Housing
Most duplexes, triplexes, and fourplexes in Kamloops fall under Part 9 of the BC Building Code, which applies to housing and small buildings under three storeys. While this is the same section used for single-family homes, multi-family buildings must meet additional safety and performance standards.
These requirements are designed to protect occupants, reduce risk, and ensure each unit functions as a safe and independent dwelling.
Fire Separation Requirements for Duplexes and Fourplexes
One of the most important differences between single-family and multi-family construction is fire separation.
Each unit must be separated by fire-rated walls and floor assemblies designed to slow the spread of fire between units. This typically includes:
- Fire-rated wall assemblies between units
- Fire-rated ceilings between stacked units
- Fire stopping in concealed spaces
- Separate smoke alarms in each dwelling
- Protected openings and penetrations
These systems are critical for life safety and are strictly enforced through inspections and code compliance.
Single-family homes do not require internal fire separations because they contain only one dwelling unit.
Soundproofing and Acoustic Requirements
Sound control is another key requirement in multi-family housing construction.
Walls and floor systems between units must be designed to reduce noise transmission and meet minimum Sound Transmission Class (STC) ratings. This helps ensure privacy and comfort for occupants.
Common soundproofing methods include:
- Insulated wall cavities
- Resilient channel systems
- Double stud wall assemblies
- Specialized floor underlayments
These requirements are not necessary in single-family homes but are essential in duplex and multi-unit construction.
Separate Entrances and Independent Building Systems
Each unit in a duplex, triplex, or fourplex must function as a completely self-contained residence.
This means each unit must have:
- Its own entrance
- Separate kitchen and bathroom facilities
- Independent heating and ventilation systems
- Dedicated electrical service or metering
- Proper emergency escape windows
These requirements ensure safety, functionality, and code compliance for each individual unit.
Structural and Design Considerations
Multi-family buildings often require additional structural planning compared to single-family homes.
This may include:
- Increased load-bearing requirements
- Engineered beams and floor systems
- Enhanced fire-rated assemblies
- More complex mechanical layouts
Proper planning during the design phase is essential to ensure the building meets all structural and safety standards.
Energy Efficiency Requirements in Kamloops
New duplexes, triplexes, and fourplexes must also meet BC Energy Step Code requirements, which focus on improving energy efficiency and reducing environmental impact.
These standards include:
- Improved insulation
- Air-tight construction
- High-performance windows and doors
- Efficient heating and ventilation systems
Energy-efficient buildings provide lower operating costs, improved comfort, and higher long-term value.
Permits and City of Kamloops Requirements
All multi-family construction projects in Kamloops require proper permits and inspections.
The City of Kamloops reviews projects for compliance with:
- Zoning bylaws
- Building code requirements
- Setbacks and lot coverage
- Parking requirements
- Safety standards
Working with experienced builders and professionals ensures the approval process goes smoothly and avoids costly delays.
The Future of Multi-Family Construction in Kamloops
Duplexes, triplexes, and fourplexes are becoming a major part of Kamloops’ housing future. These buildings provide practical, affordable housing options while allowing property owners to maximize their investment.
As demand continues to grow, builders who understand the unique building code requirements and construction standards for multi-family housing will be well positioned for success.
Whether you are a homeowner, investor, or developer, multi-family construction offers significant opportunities—but proper planning, design, and code compliance are essential.
Looking to Build a Duplex or Fourplex in Kamloops?
Working with an experienced builder who understands BC Building Code and City of Kamloops requirements is critical. Proper construction ensures safety, long-term durability, and maximum return on investment.
If you’re planning a duplex, triplex, or fourplex project in Kamloops, professional guidance can help you navigate permits, building code, and construction with confidence.