DIY Dog Ramp by IrresisiblePets.com Step by step tutorial on how to build a ramp for about $60 (assuming you have the tools already).
Low cost dog ramp plans for easy-to-build, portable, folding wooden ramps. Designed by an engineer.
I really need to build a dog ramp into the attic so I don't have to carry both of them down every time
for about $32 you can build your own doggie ramp. http://www.instructables.com/id/Inexpensive-Doggie-Ramp/?ALLSTEPS
Dog ramp over stairs
Drawing showing how to match up measurements to build a dog couch ramp with a platform
DIY Dog Ramp, I need to make one of these for Fiona, this lady made hers specifically for a dachshund and she had the genius idea of making it match her couch!
Pet ramp for car, truck, and SUV. Ideal for aging dogs or those with hip problems or arthritis. Each step has anti-skid surface to prevent slipping. The frame is adjustable. Folds for storage and transport. For pets upto 150lbs.
How to build a dog ramp
Dog ramp using wire closet shelving