The HUD Code Explained

Federal code

One federal code replaces the state code for these homes

The HUD Code is a real regulation with a citation. It is 24 CFR Part 3280, the Manufactured Home Construction and Safety Standards, first published at 40 FR 58752 on December 18, 1975 and redesignated in 1979¹. It rests on statutory authority at 15 U.S.C. 2697 and 42 U.S.C. 3535(d), 5403 and 5424¹. Every manufactured home built in the United States after June 15, 1976 must be certified by its manufacturer as built to it⁴.

What it covers is broad. In the regulation's own words, the standard covers all equipment and installations in the design, construction, transportation, fire safety, plumbing, heat-producing and electrical systems of manufactured homes designed to be used as dwelling units, and it seeks to the maximum extent possible to establish performance requirements¹. HUD's summary lists body and frame requirements, thermal protection, plumbing, electrical and fire safety among the areas covered⁴.

The part that surprises most buyers is preemption. A state cannot layer its own manufactured home construction standard on top. No state standard covering an aspect the federal standards govern may be established or continue in effect unless it is identical to the federal standard². That single rule is why a manufactured home built in one state can be shipped and set up in another without a second construction code review.

Six things the HUD Code actually does

The code is not only a set of construction rules. It also decides who inspects, who enforces, and what physically goes on the home.

Sets performance standards, not just recipes

Part 3280 covers design, construction, transportation, fire safety, plumbing, heat-producing and electrical systems for homes designed as dwelling units¹. The regulation says it seeks to the maximum extent possible to set performance requirements, though in certain instances specific requirements are necessary¹. That is why homes vary in method but not in outcome.

Preempts state construction standards

No state manufactured home standard covering an aspect the federal standards govern may exist unless it is identical². A state may not require a certified home to undergo state inspection for a covered aspect, nor require a state label certifying conformance². The regulations are described as the exclusive system for enforcing the federal standards².

Puts a permanent label on every section

A permanent label must be affixed to each transportable section offered for sale or lease, separate and distinct from the data plate¹. It is about 2 inches by 4 inches, etched on 0.32 inch aluminum, and attached with four blind rivets or drive screws so it cannot be removed without defacing it¹.

Requires a data plate you can read

A data plate must be affixed permanently near the main electrical panel or another readily accessible, visible spot¹. It carries the plant name and address, the serial number and model designation, the date the unit was manufactured, a list of certification label numbers, and major factory-installed equipment¹.

Records the design zones on the home

The data plate must reference the roof load zone and wind load zone the home is designed for, with duplicates of the maps from section 3280.305(c)¹. It also has to state whether the home IS or IS NOT designed to carry the loads of an attached accessory building or structure¹. That line governs future carports and porches.

Comes with three companion parts

The HUD Code does not stand alone. HUD identifies Part 3280 for construction and safety standards, Part 3282 for procedure and enforcement, Part 3285 for model installation standards and Part 3286 for the installation program⁵. Part 3285 sets minimum requirements for installing new homes³.

Governing regulation24 CFR Part 3280

Certification label sizeAbout 2 in. by 4 in.

What does it cost?

The code is not a line item you pay separately. HUD describes its program as establishing and collecting fees for each home built, inspecting factories and retailer lots, and authorizing a certification label for each compliant section⁵. The amount of that per-home fee is not published in the federal sources used here, so no figure appears.

What you can price is the finished home. The Census Bureau's Manufactured Housing Survey, sponsored by HUD, puts the 2025 average sales price of a new manufactured home at $127,200, with single-section homes at $85,600 and double-section at $157,100⁶. Compliance with Part 3280 is built into those prices. They cover the home only, and no federal source publishes what land, site preparation or installation add.

The regulation text is from 24 CFR Parts 3280, 3282 and 3285 as of August 2026, and the price is Census Bureau Manufactured Housing Survey 2025 annual data for the home alone, excluding land, site work and installation.

Hiring

How to use the code when you buy

1

Who does the work

HUD runs the program and enforces the standards directly and through state agencies. It inspects factories and retailer lots, regulates installation, administers dispute resolution, collects a fee for each home built, and authorizes the certification label for each compliant section⁵. The three letters at the front of a label number identify the production inspection primary inspection agency¹.

2

What pros will ask

A retailer, lender or insurer will want the serial number, the model designation, the date of manufacture and the certification label numbers, all of which are on the data plate¹. On an older home the first question is whether it was built after June 15, 1976, because that decides whether it is a manufactured home at all⁴.

3

What to check before signing

Walk the home. Confirm a label is riveted to each transportable section, then find the data plate near the electrical panel and check that the label numbers listed on it match¹. Read the roof load and wind load zones and the statement about whether the home IS or IS NOT designed for an attached accessory structure¹. Photograph both.

HUD Code questions, answered straight

Where is the HUD tag on a manufactured home?

It is a permanent label affixed to each transportable section, so a double-section home has two¹. The regulation describes it as roughly 2 inches by 4 inches, etched on 0.32 inch aluminum plate, and attached with four blind rivets, drive screws or similar means that make it hard to remove without defacing it¹. It is separate and distinct from the data plate¹. The number carries a three letter designation identifying the production inspection primary inspection agency plus a six digit number¹.

When did the HUD Code take effect?

Part 3280 was first published on December 18, 1975 at 40 FR 58752¹. The date that matters to buyers is June 15, 1976. HUD states that all manufactured homes built in the United States after June 15, 1976 must be certified by the manufacturer as built to the Standards, and that all transportable sections built after that date must carry a certification label⁴. A factory-built home from before that date is a mobile home and is not covered.

Can my city require a manufactured home to meet local building code?

Not for anything the federal standards already cover. No state manufactured home standard regarding construction and safety that covers an aspect governed by the federal standards may be established or continue in effect unless it is identical to the federal standard². A state also cannot require a certified home to be inspected for compliance with a covered aspect, or require a state label certifying conformance². Installation is handled separately, under Part 3285 and Part 3286³⁵.

What should the data plate tell me?

It must be affixed permanently near the main electrical panel or another readily accessible and visible location¹. Among other items it carries the plant name and address, the serial number and model designation, the date the unit was manufactured, a list of the certification label numbers, and a list of major factory-installed equipment¹. It also references the roof load zone and wind load zone the home was designed for, with duplicates of the regulatory maps¹.

Who handles a complaint about a defect in a new manufactured home?

Not HUD first. HUD has cooperative agreements with most state governments to check plant records and respond to consumer complaints, and each of those states designates a State Administrative Agency⁴. If a complaint about your home's performance is not resolved by the retailer who sold it or the manufacturer who built it, you contact the State Administrative Agency where you live, or HUD if your state has no such program⁴. Have the serial and label numbers ready⁴.

Sources

Where these facts came from

Every figure on this page was read out of the page linked below. We do not cite cost aggregators.

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