Manufactured vs. Modular vs. Site-Built Homes

At Clayton Homes Ashland, we offer both manufactured homes (sometimes referred to as “double wide” when multi-section) and modular homes. While both are precision-built in climate-controlled factory settings, the primary difference is the building code they follow — not the quality of construction.

Manufactured and modular homes are both built indoors in climate-controlled facilities, which protects materials from weather exposure and allows for consistent quality control throughout the construction process.

Manufactured homes are built to the federal HUD Code, regulated nationwide by the U.S. Department of Housing and Urban Development. This federal code establishes strict standards for safety, durability, structural integrity, and energy efficiency. Once completed, manufactured homes are transported to the home site and installed according to state and local requirements.

Modular homes are also constructed in a factory setting but follow the Virginia Statewide Building Code — the same code required for traditional site-built homes. After delivery, modular homes are assembled on a permanent foundation and are legally classified the same as site-built houses for appraisal, financing, and resale purposes.

Because both manufactured and modular homes are built indoors using streamlined systems and precise material planning, the factory process often results in greater efficiency and less material waste per home compared to many traditional on-site construction methods. This efficiency can also help keep projects on schedule and more cost-effective.

Site-built homes, sometimes referred to as “stick-built” homes, are constructed entirely on the home site from the ground up. Materials are delivered to the property and assembled outdoors, which can expose the building process to weather delays and fluctuating labor schedules. Site-built homes must follow the same Virginia Statewide Building Code as modular homes, but the key difference is that they are built piece by piece on location rather than in a controlled factory environment.

All three home types must meet strict safety and construction standards. The primary differences come down to the building code that governs the home and where the construction takes place — not the overall craftsmanship or quality.