How California regulates mobile home moves: licensing, how to look a mover up, USDOT rules and transport permits.
Researched from public sources, last checked March 14, 2026.
California regulates mobile-home work through installer licensing. We have no license on record specific to moving a mobile home. The primary regulator is Contractors State License Board (CSLB).
Last verified July 2026
A manufactured home moving through California travels under a Caltrans transportation permit — a single-trip permit for most moves, issued by the Caltrans Office of Commercial Vehicle Operations. There's also a separate annual Manufactured Housing permit category for movers running regular routes. Any home over the legal size limits needs one of these before it can travel on state highways.
Source: Caltrans · Office of Commercial Vehicle Operations
California requires an oversize permit — and 'Oversize Load' signage — for anything wider than 8 feet 6 inches, the legal maximum. Most homes between 10 and 16 feet wide always exceed that, though a narrow single-wide close to the legal limit occasionally won't.
Source: Caltrans transportation permits
California is unusual: escort requirements are set by the color of the route on the Caltrans pilot-escort map, not by a single fixed width. Routine manufactured-home permits are capped at 14 feet wide. On some routes a home over 14 feet can't travel during dark hours; on others a California Highway Patrol escort is required above 16 feet. Because it depends on the specific roads in the route, the exact escort setup is determined per permit. A load with more than 25 feet of rear projection also needs a pilot car.
Source: Caltrans Transportation Permits Manual (route map)
California is the one state where the binding install requirement is seismic, not wind. A manufactured home must be set on an Earthquake Resistant Bracing System (ERBS), with an install permit filed with the state Department of Housing and Community Development (HCD). Standard federal ground-anchor and tie-down requirements also apply. For wind, California is HUD Wind Zone I statewide, though some coastal areas may be rated higher.
Source: California HCD · Title 25 CCR §1374.7
In California, the contractor who installs a manufactured home — or prepares one for moving — must hold a C-47 Manufactured Housing contractor license. After installation, a local inspection leads to a Certificate of Occupancy, and an HCD Form 433A is recorded with the county before the home can be legally occupied. Homes also need their HUD certification label.
Source: California HCD · Contractors State License Board
Homes built before June 15, 1976 are classified as 'mobilehomes' and fall under the state Department of Housing and Community Development's own design and construction standards, through HCD plan review. Unlike some states, California still allows them to be sited — they simply come under HCD's jurisdiction rather than the federal HUD code.
Source: California Title 25 CCR, Chapter 3
The transport permit belongs to the mover. The Caltrans permit names the company responsible for the load, and it's void if transferred to anyone else. Manufactured-home permits are issued only to licensed dealers, manufacturers, or haulers. As a concierge move, the licensed carrier holds the permit — not the homeowner.
Source: Caltrans · CVC §35790
The installation permit is filed with the local enforcement agency — the city or county building department on private land, or HCD (or a delegated agency) inside a mobilehome park. The named applicant is typically either the homeowner or the licensed installer. Transport and installation are separate licensed steps.
Source: California HCD · 25 CCR §1020
6 companies in our records hold a California credential for mobile home work.
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