Q & A Modular vs. Manufactured Homes

Modular vs. Manufactured Homes

 by Nick Gromicko and Kenton Shepard


While the terms “modular home” and “manufactured home” refer to two very different things, they are sometimes used interchangeably. Perhaps some of this confusion stems from the fact that modular homes are, in fact, manufactured (“manufactured” might be an unfortunate label.) Also, traditional “site-built” homes are not necessarily better than modular homes, despite the stigma associated with their assembly-line origin. There have been cases where Realtors and builders of manufactured homes have misrepresented manufactured homes as modular homes, and buyers were not informed enough to know the difference. Everyone (especially inspectors, who make their living examining residences) should understand the distinguishing features of these two types of houses.


Modular Homes


Modular homes are residences constructed entirely in factories and transported to their sites on flatbed trucks. They are built under controlled conditions, and must meet strict quality-
control requirements before they are delivered. They arrive as block segments and are neatly assembled, using cranes, into homes that are almost indistinguishable from comparable ones built on-site. Wind and rain do not cause construction delays or warp building materials. In addition, modular homes:

•must conform to the same local, state and regional building codes as homes built on-site;

•are treated the same by banks as homes built on-site. They are easily refinanced, for example;

•follow the same market trends as site-built houses;

•must be structurally approved by inspectors;

•can be of any size, although the block sections from which they are assembled are uniformly sized;

•are often more basic than homes built on-site, but they tend to be sturdier;

•are highly customizable. Design is usually decided by the buyer before construction has begun; and 

•generally take eight to 14 weeks to construct. Differing from a site-built home, the foundation can be dug at the same time that the house is being constructed.

Proponents of modular homes claim that their indoor, environmentally controlled construction affords them greater strength and resilience than homes built on-site. They also tend to be constructed using more precise building techniques and with more building material than comparable site-built residences. One reason for this is that they must be able to withstand the stress of highway transport. A study by FEMA found that modular homes withstood the wind and water from Hurricane Andrew better than most other homes in the area. They take less time to construct than site-built homes, are more energy-efficient, and generally cost less.

Despite their manufacturing process, modular homes are essentially the same as homes that are built on-site. They are treated the same under the law, and their basic structural features are almost indistinguishable from site-built homes, once assembled. 


Manufactured Homes


The term “manufactured home” is the most recent label for what were once called “mobile homes” or “trailers.”  They are available in three sizes that escalate as follows: “single-wide,” “double-wide” and “triple-wide.” In addition, manufactured homes:

•conform to the Housing and Urban Development (HUD) code. These homes contain a red tag that confirms that the unit was manufactured in compliance with this code;

•are inspected at various building stages by a HUD inspector;

•are manufactured in a controlled environment at factories;

•are never more than one story;

•are transported on steel chassis that are never removed;   

•are treated as a separate lending category from modular and on-site built homes 



From Modular vs. Manufactured Homes - InterNACHI