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01The long answer

Yes, but really —
are they any good?

A straight answer, including the parts that aren't flattering. If you only read one page on this site, read this one.

02A short history of a bad reputation

Everything went wrong before 1976. Almost nothing has since.

The reputation attached itself to a product that no longer legally exists. Here is the actual sequence.

  1. 1950s01

    Trailers

    Eight feet wide, towed behind a car, aluminium skin, no insulation to speak of. This is the thing everybody is still picturing. It was a vehicle, and it was sold as one.

  2. 197402

    Congress steps in

    The National Mobile Home Construction and Safety Standards Act passes after a decade of genuinely alarming fire and structural failures. It creates a federal building code — the only one in the United States.

  3. 197603

    The HUD Code takes effect

    June 15, 1976. Everything built after this date is legally a manufactured home, not a mobile home. Fire ratings, wind resistance, plumbing and electrical standards, third-party plant inspection. The industry is a different industry from this morning onward.

  4. 199404

    Wind and thermal zones

    Post-Hurricane Andrew. Wind zones II and III introduced with dramatically higher structural requirements, plus thermal zoning that ties insulation to climate. Roof loads, anchoring and glazing all tighten.

  5. 2021—202505

    Energy standards

    DOE energy conservation standards phase in, pushing envelope performance past most state codes for site-built housing. Duct leakage testing becomes mandatory. Blower-door verification becomes routine.

  6. Today06

    Where we actually are

    A 2026 HUD-code home from a good plant is tighter, better insulated and more consistently built than the median new site-built house in the same market. This is not a marketing claim; it is what the testing shows.

03Three different things

Manufactured, modular, site-built.

These get used interchangeably and they are not interchangeable. The differences change your code, your lender, your timeline and your price by a factor of three.

Manufactured, modular and site-built homes compared across nine criteria
CriterionManufactured (HUD)Modular (IRC)Site-built
Building codeFederal HUD Code — one standard nationwideState/local IRC, same as site-builtState/local IRC
Where it's builtIndoors, on a jigIndoors, on a jigOutdoors, in whatever weather there is
Inspection9 third-party in-plant inspectionsIn-plant + local final3–6 local inspections, mostly visual
Build time8–12 weeks10–16 weeks7–14 months
Typical cost / sq ft$95–135$140–190$220–380
ChassisPermanent welded steelRemovable carrierNone
FinancingChattel, or real-property lending on owned landConventional construction loanConventional construction loan
AppreciationFollows the land and titlingSame as site-builtSame as site-built
Lumber rained onNeverNeverFrequently

04Energy

The bill is where the argument ends.

Envelope performance is the one claim in this industry that cannot be fudged, because a third party puts a fan in your front door and measures it. Our homes leave the plant blower-door tested, with the result on paper, in the drawer, in the kitchen.

A factory does this better than a job site for an unglamorous reason: the same crew installs the same window flashing detail four hundred times a year under a roof, at waist height, with the wall lying flat on a table.

Blower-door testedDuct leakage verifiedENERGY STAR pathway available

The HERS index

Lower is better

A HERS rating is the industry's standardised energy score. 100 is a house built exactly to the 2006 reference code. Every point below that is a one percent reduction in modelled energy use.

Typical 2005 home130
New code-built home100
Typical new HUD-code home62

05Where the sceptics are right

Three things we are not going to talk you out of.

Any dealer who tells you there is no downside is telling you something else too, and you should listen to that instead.

  1. 01

    Financing on leased land really is worse.

    A chattel loan on a rented pad runs roughly two points over a comparable mortgage and amortises over 20–23 years instead of 30. Nobody should pretend otherwise. It is why our first question is always about the ground, not the granite.

  2. 02

    Resale is thinner, and slower.

    The buyer pool for a home on leased land is smaller and more credit-constrained. Expect a longer time on market than a comparable site-built house. On owned land with a permanent foundation, this evens out almost completely — but it takes a permanent foundation, not a promise.

  3. 03

    The floor is a real floor, but the market's floor isn't.

    There are still bad plants and bad dealers, and the price spread between the worst HUD-code home and the best one is enormous. Ask any dealer for the in-plant inspection reports and the blower-door result. If they can't produce them in a day, walk.

06Common questions

The ones we actually get asked.

Legally, no. “Mobile home” refers to anything built before 15 June 1976, when the federal HUD Code took effect. Everything built after that date is a manufactured home, and the two are governed by completely different rules.

In conversation people use the terms interchangeably, and we are not going to be precious about it. But if you are reading a loan document, an insurance policy or a zoning ordinance, that date is the line that matters.

Still not convinced?

Good. Come and be unconvinced in person — it takes about twenty minutes and a flashlight.

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