How do I put a ramp up to a mobile home just 4 feet off the ground

You’ll need to use treated lumber, as this sits out in the open. Treated plywood is called CDX, amongst other grades.

I’ll find you some pictures, hold on.

This took 7 days to build & 1 of the 2 persons is an architect.

The ramp technically should be longer & more shallow in pitch, but there wasn’t room. 2:12.

Plan on a wheelchair & two people weighing 500 lbs.

Check with your local building codes office for ADA compliance. Be safe. Best of luck.

the best and cheapest, is buy 4x4, and cement square post blocks and get free pallets. take some of the pallets pirate the boards, and place between boards on ramp pallets. you can also use pallets for railings. all hardwood and cost less than half of what you pay commercially

I would begin by pointing out it depends on why you want a ramp. If it is just because you prefer that, then ADA compliant is not a big issue, but you will still need to meet local building codes. If, however, you need it for a person with mobility issues, you need to make sure it meets ADA compliance requirements as well as local building codes.

Using pallets, as Phaedon suggests, is not likely to meet building codes anywhere and I do not recommend it.

Your local library likely has many books on building decks and such, and a ramp is basically a deck that is on an angle, so I would suggest starting with books from the library once you have an understanding of what is needed to meet building codes and such.

Another idea would be to contact your local Habitat for Humanity to see if maybe they have plans that they would be willing to share with you.

All advice above is good and correct, and do build it solid as well, and even though you use exterior wood, I would still put a sealant on it as well, just for better service and conditioning. Good luck

As a handyman, I have built many ramps for people over the years. However, with the price of lumber skyrocketing, aluminum ramps are now pretty close to the same cost and offer many advantages over wood ramps. Wood starts to deteriorate after several years, can be very slippery when they get wet and usually take days to complete. The residential modular ramp system is a convenient option that I have started using:

https://expressramps.com/pathway-3g-wheelchair-ramps

They are pretty easy to configure as needed and install in a few hours.

Hope that helps!