Why Choose Modular
Modular Construction, sometimes referred to as prefabricated or off-site construction, is a building method in which prefabricated modules—constructed off-site in a controlled factory environment—are transported to the site and permanently installed on foundations to create complete, code-compliant buildings.
Modular Construction can also be delivered in a hybrid approach, with projects combining conventional, panelized and modular components. It is the fastest form of off-site building delivery using a factory-controlled environment ensuring:
- Wall and floor panels are assembled and structurally fastened.
- Mechanical, electrical and plumbing are completed and certified.
- Flooring, millwork, trim work, paint and finishings are completed.
- CSA standards, audits and certification by independent, third-party inspection agencies verify quality control and code compliance before it leaves the factory.
Modular Delivers Maximum Value
Modular is particularly well-suited for, and has advantages over panelized and conventional methods in the following scenarios:
- Time Sensitive: Fully completed modules reduce on-site construction schedules by +/-50% compared to conventional methods.
- Remote or Trade-Scarce Regions: Factory work mitigates skilled labor shortages.
- Challenging Climates: Winter works are insulated from seasonal constraints.
- Sensitive Environments: Less noise, dust, disruption and safety risks.
- Socio-Economic: Quicker delivery of services to communities for childcare, schools, affordable housing, emergency housing, etc.
- Return on Investment (ROI): Faster occupancy accelerates cash flow.
- Scalability and Repeatability: Streamlined design-to-delivery cycle.
- Cost Certainty: Upfront pricing, reduced risk of overruns.
- Green Metrics: Material efficiency, CO2 emissions, energy consumption.
- Safer Conditions: Controlled environments improve worker safety and build quality.
- Greater Quality Control: Controlled work environment, standardized process and independent 3rd party CSA audits.
- Predictable Costs & Timelines: Reduced project risks.
- Regulatory and Compliance: Fast-tracked permitting approvals through the DASH Program in Metro Vancouver and other similar programs in BC.
Unlike panelized systems, modular construction is the only off-site building method that allows full relocation and repurposing of entire structures. This makes it ideal for communities facing uncertainty—whether due to shifting demographics, evolving service demands, or unpredictable land use priorities.
By enabling buildings to be moved, expanded, or reused in new contexts, modular solutions reduce long-term costs, minimize waste, and support more adaptive urban and regional planning. For governments, developers, and service providers, this means better resilience to population changes and greater return on capital investment.
Re-Think Modular
Whether you’re exploring the benefits of modular, shaping a design, or ready to build – we can help. Early engagement with a modular specialist will decrease project costs.
Is modular the same quality as site-built structures?
- Modular is no longer the trailers or mobile homes that once had limited design and aesthetics.
- Modular buildings must meet or exceed the same building codes (e.g., National or Provincial Building Code) as site-built projects.
- Third-party inspections and certifications (e.g., CSA A277) ensure compliance and consistency.
- In many cases, modular units are built to higher tolerances to withstand transport and craning.
Does modular mean “cookie-cutter” design?
- Many assume that factory-built related to the design when in fact it refers to the construction method.
- Modern modular construction supports custom architecture, including varied facades, rooflines, and interior layouts.
- Modules can be stacked, rotated, and combined to create complex, high-end designs—mid-rise, mixed-use, or multi-residential.
- Design flexibility is equal to or greater than site-built methods when early collaboration occurs between architects and modular manufacturers.
Are modular buildings mostly temporary?
- Relocatable or mobile structures are not the same as modular buildings.
- Modular buildings are permanent, code-compliant structures designed for 50+ years of use.
- They can be installed on full permanent foundations and even exceed code requirements in areas like seismic or wind loads.
Is modular construction only for low-cost or affordable housing?
- Modular construction is used for market-rate housing, luxury homes, hotels, schools, and office buildings.
- It provides cost efficiency through process, not by cutting corners.
- The quality and finishes can match or exceed traditional builds based on the project’s budget and design intent.
Aren’t modular buildings mass-produced?
- Process efficiency and parallel scheduling means greater production speeds.
- Factories use controlled environments, repeatable processes, and rigorous quality control to deliver consistent, defect-reduced products.
- Components are protected from weather, reducing material degradation, mold risk, and delays common on site-built projects.
Is modular for single-storey buildings only?
- Historically, most modular buildings were 1–2 stories, but this is no longer the case with current technology and methods.
- Modular construction is being used to build mid-rise and even high-rise buildings globally.
- Advanced structural engineering, hybrid systems (e.g., steel podium + modular), and BIM make complex modular solutions feasible.
Is modular construction cheaper than tradition construction?
- Modular construction is often, but not always, cheaper than traditional, on-site construction. It can significantly lower costs in remote areas and in markets with a lack of trade availability.
- It provides the greatest value when implemented through program-based delivery – enabling scalable, repeatable solutions, and not one-off projects. Alternatively, utilizing existing designs can still leverage economies of scale.
Construction Method Comparison
Modular vs. Panelized vs. Conventional Construction
| Metric | Modular Construction | Panelized Construction | Conventional Construction |
|---|---|---|---|
| STC Rating (typical) | STC 45–55+. Factory-built assemblies with insulation, resilient channels, and QA control | STC 40–50. Good materials, but field assembly can impact soundproofing consistency. | STC 33–45. Variable performance depending on site workmanship and materials. |
| Build Speed | 30–50% faster due to parallel factory/site work. | 20–30% faster with panel pre-fab but site assembly. | Slowest. Sequential trades and full on-site construction. |
| Quality Control | High. Fully controlled factory environment ensures consistency. | Moderate. Panels built to spec, but site tolerances can vary. | Low to moderate. Dependent on site labor and varying trade skills. |
| Site Disruption | Minimal. Up to 90% of construction completed off-site. | Moderate. Less disruption than conventional but more than modular. | High. Extensive on-site work and staging. |
| Worker Safety | High. Factory settings reduce exposure to jobsite hazards. | Improved. Reduced framing risk, but significant on-site activity remains. | Higher risk. Entire construction process occurs in variable field settings. |
| Environmental Impact | Low. Precise material use, minimal waste, and efficient logistics. | Lower than conventional. Some on-site waste and energy use. | High. Greater material waste and on-site emissions. |
| Air Leakage Testing | Excellent. Tight factory tolerances lead to strong blower door results and airtight envelopes. | Good. Panel joints may require more on-site sealing; performance varies by detail. | Inconsistent. Site-built assemblies are prone to gaps, rework, and air leakage. |
Summary: Key Performance Insights
- Modular Construction continues to lead in acoustic performance (STC 45–55+) and airtightness, thanks to factory QA, precise insulation installation, and minimized site variability. It supports energy efficiency and occupant comfort, making it a strong fit for schools and other performance-driven building types.
- Panelized Construction strikes a practical balance: faster than conventional, with moderate control over acoustic and air sealing performance. Outcomes depend heavily on detailing and execution during on-site assembly.
- Conventional Construction shows the greatest variability in both sound and energy performance. Acoustic quality and air sealing often fall short due to site-specific conditions, inconsistent workmanship, and exposure to weather during framing and finishing.
Do CSA Standards apply to modular construction?
Yes. CSA A277 Modular Factory Certification is a third-party certification standard developed by the Canadian Standards Association (CSA) to regulate and ensure quality in factory-built buildings—also known as modular or off-site construction. This certification confirms that a modular building is constructed in compliance with applicable building codes, engineering standards, and manufacturing best practices.
The A277 certification involves:
- Factory audits to ensure that the manufacturer has documented quality control procedures and follows them consistently.
- Compliance verification with the National Building Code of Canada (NBCC) or applicable provincial building codes.
- Regular inspections by independent certification bodies like QAI or Intertek to assess manufacturing processes, materials, and documentation.
- Labeling of modular units, certifying they are built to code and inspected at the source.
It is often mandated by provincial regulators in jurisdictions like British Columbia, Alberta, and Ontario before modular units can be shipped or installed.
CSA Standards Comparison Summary
| Feature | CSA A277 (Modular) | CSA Z240 MH (Mobile Home) | CSA Z241 (Park Model) |
|---|---|---|---|
| Intended Use | Permanent buildings | Relocatable dwellings | Seasonal/vacation dwellings |
| Code Compliance | Full provincial building code | Z240 MH technical standard | Z241 recreational standard |
| Foundation | Permanent foundation | Blocks/piers | Temporary/mobile chassis |
| Municipal Permit | Required | May vary | Usually not applicable |
| Use Case | Homes, schools, offices, etc. | Housing communities, rural lots | Campgrounds, RV resorts |
