1991 to 2020 normals: 50 inches in the north, about 65 along the coast
Van builds on the Gulf Coastal Plain
Humidity is the design problem. A van that lives here spends most of the year above dew point inside and out, so insulation detailing, vapour control and airflow decide whether a build lasts. Size to the Natchez Trace, which caps you at 55 feet overall and 14 feet high and has three Mississippi underpasses below 15 feet. Roof clearance matters again on forest roads under low pine limbs. Electrical load skews toward cooling rather than heating, which changes battery sizing, alternator charging and where the compressor lives.
A conversion is a small house on a moving, flexing, weight-limited platform. The builder insulates and lines the shell, installs the electrical system, plumbing, heat and ventilation, builds the bed, galley and storage, and cuts the holes for windows, fans and vents that you do not want to get wrong.
Some shops build complete vans to a set floor plan. Others build to order, and a few will take on partial work such as electrical only.
A typical conversion includes
01Insulation, wall and ceiling panels, and flooring
02House battery, alternator charging, solar, inverter and shore power
03Roof fan, heater, and sometimes air conditioning
04Fresh and gray water, a sink, and sometimes a shower and water heater
05Bed, galley, seating and storage
06Windows, racks, ladders, awnings and exterior lighting
How to choose a van builder
Floor plans are easy to fall for. The questions underneath them matter more.
01Decide between a shop's standard layout and a custom build. Standard layouts are faster, and the shop has already solved their problems.
02Ask what the finished van weighs with water and gear. Sprinters are sold in several gross weight ratings, and a heavy build on the lightest chassis leaves little margin.
03Ask how the electrical system is protected and documented, and whether the components can be serviced on the road.
04Ask how cabinetry is fastened to the van. Furniture that is only screwed to thin wall panels works loose on rough roads.
05Ask how added seats and seat belts are engineered and anchored if anyone rides behind the front row.
06Get the scope, price, payment schedule and delivery date in writing.
What to have ready before you ask for a quote
The van you order decides what can be built in it, so it helps to talk to a builder before you buy.
01Model year, 144 or 170 wheelbase, roof height, and two-wheel, all-wheel or four-wheel drive
02How many people sleep in it and how many ride in it
03The seasons and climates you travel in
04Whether you need to work from it
05What goes inside with you: bikes, boards, dogs
06A budget range and the date you want to be traveling
Questions people ask
Do I need to own the van before I contact a builder?
No. Many builders would rather talk first, because the wheelbase, roof height and drivetrain you order decide what can be built. Some shops can also source a van.
How long does a Sprinter conversion take?
A full custom build is usually measured in months, plus whatever wait the shop has before it can start. Standard layouts are quicker. Ask for both numbers.
Should I get the 144 or the 170 wheelbase?
The 144 is easier to park, turn and drive on tight roads. The 170 gives you room for a fixed bed and a real galley without compromise. Think about where you will actually drive it, then about how you want to live in it.
Can these builders work on a Ford Transit or Ram ProMaster?
Many do. If you are on another platform, say so in the form and we will look for shops with that experience.
How high is Mississippi?
From Gulfport at 20 feet to Woodall Mountain at 806.
Altitude decides what your engine, your brakes and your lungs have to work with, and how late in the year the passes open.
02,000
Feet above sea level
Towns
Holly SpringsChewalla Lake and the north unit of the forest605 ft
IukaNearest town to Woodall Mountain and the Tennessee River corner570 ft
OxfordHolly Springs forest office and the Yalobusha unit507 ft
ForestBienville forest office; Marathon Lake lies south east479 ft
MeadvilleHomochitto forest office; Clear Springs is five miles west314 ft
JacksonForest Supervisor’s Office; the Trace is busy at rush hour here278 ft
TupeloParkway visitor centre and the way in to Tombigbee forest277 ft
WigginsDe Soto Ranger District office; gateway to Black Creek260 ft
VicksburgCorps district town, the 16-mile tour road and the river bluffs242 ft
NatchezMilepost 0 on the Trace and the south end of the river byways215 ft
WaynesboroChickasawhay country: Turkey Fork, Little Tiger and Longleaf191 ft
HattiesburgLargest services before the De Soto and Camp Shelby country164 ft
New AugustaTurn for Rattlesnake Bay and the Black Creek Wilderness111 ft
Rolling ForkDelta Ranger District office and Delta trail permits106 ft
Ocean SpringsDavis Bayou, the only drive-in Gulf Islands area in the state21 ft
GulfportShip Island ferry and the west end of the Gulf Coast byway20 ft
Passes, high roads and summits
Woodall MountainThe state high point, in Tishomingo County. Our own reading at the summit point gives 805 ft806 ft
Pass, road and summit elevations are the figures published by the agency that manages them. Town elevations are the town’s or county’s own
figure where it publishes an exact one; the rest are from the U.S. Geological Survey (3D Elevation Program at the place’s official coordinates),
retrieved September 18, 2026. Every source is listed at the foot of the page.
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