Custom RV and Van Modifications in Yorba Linda

Structure first. Any window, vent, fan or roof opening is cut and framed while the shell is empty, because cutting a hole in a finished vehicle means protecting everything already installed. Reinforcement for racks, beds and heavy equipment goes in at the same stage.

Then the systems that live inside walls: electrical rough in, plumbing runs, heating ducts or hydronic lines, and any conduit for future additions. Insulation and vapour management follow, and this is where conversions in a mild climate frequently go wrong, because condensation control matters even in Southern California once a vehicle is used at elevation or on the coast.

Then walls and ceiling, then cabinetry and furniture, then appliances and fixtures, then finish, then commissioning. Each stage constrains the next, and a change requested at cabinetry stage that affects electrical rough in is expensive in a way that is entirely avoidable with proper planning up front.

• Structural openings, framing and reinforcement while the shell is empty
• Electrical rough in, plumbing runs and heat distribution inside walls
• Insulation and condensation management before anything closes up
• Wall and ceiling panels, then cabinetry and furniture
• Appliances, fixtures and finish work
• Commissioning of every system with the owner present

Weight, movement and moisture, in that order. Weight because every cabinet consumes payload and a build out that reaches gross vehicle weight rating before the owner has packed is a failed design. This is why conversion cabinetry is built lighter than house cabinetry, using thinner panel, poplar or aluminum framing and honeycomb panel where it earns its cost.

Movement because the vehicle flexes constantly. A rigid cabinet run bonded across a flexing wall will either crack itself or crack the wall. Correct practice allows the structure to move: fastening to framing at controlled points, using flexible sealant rather than rigid adhesive at long joints, and avoiding spans that fight the vehicle.

Moisture because a vehicle interior is a small sealed volume containing people who breathe, cook and shower. Without adequate ventilation and thoughtful insulation, that moisture condenses on the coldest surface, which is usually the metal skin behind the insulation where nobody sees it until the panel delaminates or the steel corrodes.

By phase, with a written scope and a fixed price for each. The vehicle is assessed, the intended use is discussed in detail, and a phased plan is produced with pricing per stage. You approve each phase before it starts, so the project can be adjusted, paused or completed at defined points rather than drifting.

Published pricing on custom build out, camper conversion, mobile office and mobile medical work is $5,000 to $80,000 and up across 40 to 400 labor hours for vans. Trailer interior build out and conversion is $2,500 to $50,000 and up across 20 to 250 hours. Deposits are 50 percent at authorization over $2,000 and an additional 25 percent when parts arrive on jobs over $10,000.

Calendar time runs two to six months on substantial conversions. Special order components, particularly appliances, windows and lithium systems, drive that schedule more than shop hours do, and we order long lead items at the start rather than when their phase arrives.