A factory builds the boxes, but the foundation is still poured, driven or screwed in on site, usually while the units are in production. The local building department usually permits and inspects the foundation, site utilities and the installation. Module-to-foundation connections are often split between parties, so get the engineering responsibility in writing. Call a foundation company once you know module weights and the set sequence; our contract guide lists what to pin down.
The list below: 5 companies, described in their own words.
CHANCE Foundation Solutions (Hubbell)
Engineered helical piles, anchors and resistance piers. Visit hubbell.com
GoliathTech
Screw pile foundation systems. Visit goliathtechpiles.com
Techno Metal Post
Helical piers and posts for foundation support. Visit technometalpost.com
Diamond Pier
No-dig pier footings for decks, porches and posts, with commercial options. Visit diamondpiers.com
Oliver Technologies
Pier pads, anchors and steel foundation systems for manufactured homes. Visit olivertechnologies.com
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Last checked October 2026. Order is editorial. Paid placements are labeled and never change the order. How we list.