How to make a DIY cage for guinea pigs

A “C&C cage” is one of the best (and cheapest) cage options for guinea pigs. C&C stands for “Cubes and Coroplast.” It is assembled using 14-inch wire storage cube grids and connectors (or zip ties) with a waterproof lining (coroplast) at the bottom. You can buy these in a premade set (assembly still required) from places like and Kavee, but the cheapest option is to do-it-yourself!

square metal grid and connector
Grid and connector

Supplies (for a 2×4 C&C cage – the preferred size for 1*-2 guinea pigs)

12 14-inch grids (cheapest I’ve found is Amazon storage grid basics or keep an eye out at Goodwill. Note: if you have baby guinea pigs, use a solid grid because they can fit through the bars.)

24 connectors (or zip ties)

39”x 68” coroplast (for 6-inch walls, you can adjust wall height as needed)

OR another type of waterproof bottom. Like a plastic floor protector, plastic desk mat, or carpet squares.

Duct tape

Scissors and razor to cut and score the coroplast

*It is not recommended to have one guinea pig. They thrive in groups. Why guinea pigs need a friend

Assemble the C&C grids

Connect the grids with connectors (or zip ties with lock facing out) on the top and bottom of each grid. There should be 2 grids on each short side and 4 on each long side (2×4). There are no grids on the bottom as it’s intended to be placed on the floor or a sturdy table.

Remember: these are 14″ grids. 2×4 does NOT mean 2 feet x 4 feet. The actual size will be approx 2.33 feet x 4.66 feet.

Make the waterproof base

If using coroplast,

Measure the length of each grid wall inside the cage. It should come out to approx 27″ x 56″. If you are using fleece bedding, you could make a 3-inch wall on all sides, but if you are using disposable bedding, you’ll want at least a 6-inch wall. It’s easier to cut the wall shorter than to add more wall, so don’t be afraid to start with a tall wall and make adjustments later. 
If you want a 6-inch wall, add double that (12 inches) to each measurement of your cage. So if your cage measurement was 27″ x 56″, your coroplast measurement would be 39”x 68”. 

Cut out the coroplast with this new measurement. 

Trace the wall lines with a pencil (hint: 6 inches away from the edge)

Score all wall lines. “Scoring” means that you are cutting through the first layer, but not the second. This will allow the coroplast to fold easily.

On each corner, cut only ONE of the lines all the way through. 

Now you can start folding the corners up and taping them into sides of a box. 

Ta-da! You’ve made a coroplast waterproof liner for your C&C cage! It’s ready for your bedding to be added.

If using another base,

You certainly don’t have to use coroplast for your base, I didn’t with my first cage! Instead you can find an alternative solution like a plastic floor protector, plastic desk mat, vinyl flooring scraps, carpet squares, tile, heavy duty plastic table cloth… This works best if you are using fleece bedding as it doesn’t make an edge and disposable bedding can be easily kicked out. 

And that’s a basic C&C cage!

If you are wanting a custom shape or maybe want to add a loft or storage space under, the opportunities are limitless! Check out all of these cool diy C&C cage designs.


how to make diy waterproof liner for guinea pig cage or kitchen using chloroplast #guineapigcare #guineapigs

♬ dance(256762) – TimTaj