A modular home is built in large sections inside a factory, then transported to your lot for final assembly and installation. The word “modular” refers to the construction method, not the style of house. These homes can resemble any other type of home, including single-family, two-storey, duplex, or townhome designs.
Modular homes must meet the National Building Code (NBC) or the applicable provincial building code in the area where they are installed. They can sit on a basement, crawl space, or other approved foundation. Some homes include sub-frame rails designed for permanent surface foundations under CSA Z240.10.1. Once assembled, you get a long-lasting home built to the same standard as site-built construction.
Yes. Most municipalities require both a development permit and a building permit for new modular or manufactured homes. Some areas also require a foundation inspection. You usually need permit approval before getting gas or electrical permits.
Your local permitting office will explain what documents you need and when inspections will happen. In many cases, foundation photos or engineered drawings are accepted. Talking with your permit office early helps avoid delays.
Every modular and manufactured home is built in a certified factory. Independent agencies, such as CSA, Intertek, or the Quality Auditing Institute (QAI), inspect each facility to confirm that homes meet Canadian building standards.
As homes move through the production line, inspectors check each stage. When the house is complete, a certification label and serial number are attached to confirm compliance. In Alberta, homes may also carry an Alberta Municipal Affairs label. These quality-control steps ensure that trained staff, code-compliant design, and proper safety procedures are used throughout the construction process.
Modular and manufactured homes can be placed on basements, crawl spaces, or foundations that meet provincial building codes. The CSA Z240.10.1 standard outlines the requirements for supporting homes on permanent surface foundations and specifies when anchoring is necessary, taking into account wind loads in your area. In most regions, homes 16 feet wide or wider placed on surface piers typically don’t need anchoring unless they are in high-wind zones. Your builder will help confirm the correct foundation system based on your location and soil conditions
A manufactured home is a one-storey home built in a factory to the CSA Z240 MH Standard. Each home includes a certification label and specification sheet that provide details for building officials.
Most manufactured homes are built on steel frame rails and are designed to sit on permanent surface foundations that follow CSA Z240.10.1. These homes are engineered to perform safely in climates across Canada.
Both modular and manufactured homes are built in factories; however, they follow different construction standards and are approved by municipalities in varying ways.
Modular homes:
Manufactured homes:
In Alberta, new homes built to the CSA Z240 MH Standard are not permitted unless a municipality allows them. Existing Z240 homes already in Alberta may be moved at a municipality’s discretion.
A park model trailer is a small, seasonal unit (no larger than 50 m²) designed for short-term or vacation use. It is built on a wheeled chassis, allowing it to be moved occasionally, and it can connect to utilities when set up. Please be aware that park models are not approved or designed for year-round living in any part of Canada.
Every factory-built home has a unique serial number and CSA label. These identifiers help confirm code compliance and are required by lenders, insurers, and regulators. CMHC also requires this information when a homeowner applies for mortgage insurance.
Most modular homes have a Specification Name Plate inside the house that lists both the serial number and the CSA certification label. These identifiers confirm the home was built to the correct standards for the province where it will be installed.
Common places to find the name plate include:
Some modular homes may also have portions of the serial number stamped or printed on the structure itself.
If you are unable to locate the serial number or CSA label, check your purchase documents or contact the sales centre that supplied the home. Both numbers are important for financing, insurance, resale, and building approvals.
Start by checking the steel frame or exterior siding for stamped numbers or attached plates. If the home was sold through a realtor, MLS records may also list this information.
If the serial number is unavailable, check your financial paperwork or contact the sales centre. Most insurance companies require an identification number to issue coverage.
CSA numbers cannot be replaced—new numbers can only be issued at the factory during construction.
The National Building Code sets construction requirements for homes. CSA A277 is a certification program that ensures factory-built homes meet the NBC for the province where they will be installed. Because modular homes are built off-site, third-party agencies such as CSA, Intertek, and QAI inspect factories regularly to verify compliance. Homes that meet the standard receive a CSA A277 label.
With this system, local building officials only need to inspect work done on-site (such as the foundation and utility connections). As building codes evolve, the modular industry continually updates its designs and materials to support safer, more energy-efficient homes.
Modular homes cost less to build because much of the work is done off-site in a factory. That means fewer delays, less exposure to weather, and more predictable costs. They offer a quality build with faster timelines, making them a strong option for middle-income families and retirees alike.
When built well and maintained, modular homes can appreciate in value just like traditional homes. Because they are constructed to meet code and delivered with precision, they offer long-term reliability and resale potential.
No. Most modular homes are assembled on-site and remain in place. They are designed to sit on permanent foundations, meet strict building codes, and resemble traditional homes in appearance and function. Mobile homes/mobile manufactured homes typically follow different standards and construction methods.
Yes. Modular homes must comply with building codes similar to those for site-built homes. They are constructed in climate-controlled, well-supervised factory settings—that means tighter construction, consistent quality, and durable performance.
Many modular home communities offer well-planned amenities near major cities—playgrounds, trails, community centres—and strong neighbour relationships. Owners often stay long-term, enjoy a sense of belonging, and benefit from a professionally managed environment.
Building a modular home is easier when you have trusted guidance. MHAPP members can help you understand timelines, budgets, financing options, and permit requirements so you can move forward with confidence. Whether you’re comparing build methods or getting ready to start, our members are here to help you make informed decisions.
