Subaru Outback Camper Build

Woodworking • Solidworks • Budgeting • Adventure

Camper inside a Subaru Outback
Cooking some dinner by our trusty steeds in the Winds, WY

Summary

In 2021, I bought a Subaru Outback, designed a camper build for it using Autodesk Inventor, bought the wood and hardware, built it in my parents' driveway, and left for a 2-month roadtrip with a friend. I did this all within a week. It remains one of my favorite home projects. I got to bring a design to fruition and use it immediately, and it helped me experience many cool places on my way to my new home in Utah.

Skills Required & Applied

  • CAD modeling (Autodesk Inventor)
  • Design for easy assembly (only simple hand tools)
  • Basic woodworking
  • Budgeting
  • Tight time constraints

Process

Measuring the Space

As soon as I bought my car, I brought it home and started measuring the trunk geometry. I wanted my design to maximize its use of the limited, compact space of my trunk. The wheel wells prevented me from using a simple rectangular approach, so I made sure to take careful measurements around each well.

Trunk space view 1 inside the Subaru Outback
total trunk space
Trunk space view 2 showing seat/trim constraints
right wheel well
Trunk space view 3 showing measurement references
left wheel well

Once I had reliable reference dimensions, I used my sketches to design a full assembly of my camper idea in Autodesk Inventor. I kept the platform split into simple panels so it could be built with basic cuts, assembled quickly, and still come apart cleanly whenever I needed the back seats again.

Early design layout transferring measurements into a CAD sketch/model

First pass: turning the real car envelope into a buildable geometry.

Early translation: measurements → layout

Process

Modeling the Build

I wanted the build to do more than just provide a sleeping platform and basic unorganized storage. I designed a clothes compartment accessible from the mattress, simple shelving for toiletries, and a drawer system that doubles as a cooking counter with quick access to supplies. CAD made it much easier to integrate these features, check clearances, and make sure everything worked together. Since I was also working with a constrained budget, I also used CAD to generate a bill of materials and stay on top of costs throughout the build.

CAD view of the overall camper platform

Overall footprint and panel split.

CAD — overall platform
CAD view of storage compartments under the platform

Compartment sizing driven by real gear + usability.

CAD — storage layout
CAD view focusing on the drawer system

Drawer length, slide placement, and access clearance.

CAD — drawer system

Process

Building the Rig

After finalizing the design, I bought the wood and hardward and began building. Here, I've included a few pictures of the process, but it was honestly all pretty straightfoward woodworking (e.g., sawing and assembling with screws and nails).

1) Cutting the base panels

Cutting out the base panels for the camper platform
Base panels cut from plywood
Test-fitting base panels inside the Outback
Test fit inside the car

2) Leveling the base

I wanted the platform to be relatively flat and level for comfortability. I measured the level of the driveway and tried to match that as best as I could to try and make my sleeping platform parallel with the ground.

Obviously, this step was not too critical since I did not anticipate that I would ever be parking my car on a perfectly level surface, but whatever! The leveling base boards under my bed system also created a nice storage slot for shoes.

Leveling the camper base platform
Leveling and dialing in the base

3) Constructing the skeleton

Internal skeleton frame of the camper platform
Skeleton frame showing different storage compartments
Top panels installed on the camper platform
Top panels installed

4) Access ports for small items

Access port build photo 1
Cutting out shelves for toiletries
Access port build photo 2
Covered and finished!
Final access port in the completed build
Getting put to use!

5) Building the drawer system

The drawer was a very simple design. Basically, it was just a totally independent drawer that could slide in and out of a slot within the camper build. I cut out and built a counter platform on the end of the drawer to function as a cooking surface, which proved to be very comfortable and useful throughout my travels.

Drawer system construction photo 1
Independent drawer built
Drawer system construction photo 2
Drawer installed
Finished drawer in the completed rig
Finished drawer (in cooking mode)

6) Building the Closet

I wanted my clothes to be easily accessible from my bed/mattress, so I cut out a "closet" that accesses a compartment within the camper build. The compartment could be accessed by simply opening a covering panel. When closed, the panel is still load bearing to hold my weight or whatever else I needed to store in my trunk.

Clothes compartment closed
Closet closed
Clothes compartment open
Closet open

7) Finished product

Completed Subaru Outback camper build
Completed build. Ready for takeoff.

In use

Using the Rig

My friend and I convoyed out west in our respective trusty steeds on a fully-loaded roadtrip. We took our diy campers through the mountains, deserts, rainforests, and coasts from PA to Washington with a lot of stops along the way.

Subaru camper build being used on a trip photo 1
Olympic NP, WA
Subaru camper build being used on a trip photo 2
Ten Sleep, WY
Subaru camper build being used on a trip photo 3
Somewhere in South Dakota
Subaru camper build being used on a trip photo 4
Finishing the trip in Glacier NP, MT