Manufactured home additions are becoming increasingly popular but are more complex to build than a traditional home. You must understand the process and requirements for creating a manufactured home addition to avoid costly mistakes, fines, and delays. This guide will walk through what an approved project might look like from start to finish, including all the details necessary for obtaining permits, getting proper inspections along the way, and ensuring that your new space is built safely while meeting your needs!

What Are Manufactured Home Additions?

manufactured home addition is an extension of a single-wide or double-wide manufactured home. It must be connected to the original structure, meaning the extension must be built according to the same standards as the actual unit. The addition must be built by a fully licensed contractor, who will also ensure that all necessary permits have been obtained.

What Is A Permit?

As a homeowner, you may have considered adding to your home to create more space or make the home more livable. If so, you’ve probably also considered how much work it would be and if any permits are needed.

Permits are required for almost all additions to your manufactured home because they include electrical wiring, plumbing, and/or mechanical systems. For example, if you want to add a bathroom to your RV park model but need to know how to install the toilet or shower stall, working with an experienced contractor is crucial for getting the job done right! The costs associated with hiring this kind of work can vary greatly depending on what materials are used (such as wood versus steel).

The application process for this permit is fairly straightforward and should take about two weeks to complete. The homeowner will need to provide the following documents:

  • A completed application form
  • A sketch of the proposed addition, showing its dimensions at various elevations and with all doors, windows, and other openings indicated by size and location
  • Plans indicating where plumbing fixtures will be located when built (usually in a basement), if applicable.

Foundation And Attachment Requirements

Your foundation must be:

  • On a concrete slab. Concrete slabs are considered permanent foundations and can only be used on a single-story manufactured home. If you’re building an addition to your double-wide, you’ll need to use a double-wide trailer hitch to pull your double-wide onto its new site (see the next section for details).
  • Attached correctly with fasteners through the floor joists and into the home’s main structure. You’ll also want to check that these fasteners are securely attached themselves, as they may have come loose over time due to movement in your home or changes in temperature.

Building Height Restrictions

You may ask yourself, “What is the maximum height of a manufactured home addition?”

The answer: It depends on where you live. If you need clarification about your jurisdiction’s rules, check with your local planning department for information about what is allowable in your area.

You’ll also need to pay special attention when considering roof pitches for your manufactured home addition. You should avoid using flat roofs on your extension unless they can support snow loads or other types of heavy precipitation; otherwise, you may make costly repairs after strong winds blow through town!

Plumbing, Electrical, And Venting Requirements

When it comes to plumbing and electrical requirements, your HUD home addition must be designed to meet the same standards as a new home. This means that any additions you make need to be plumbed in a way that is safe for the occupants and meets current building codes.


Adding on to your manufactured home can be daunting, so it’s important to do your research and plan ahead. Whether adding an extra room or creating a bathroom on the second floor, many factors need to be considered before construction begins.