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Old 03-20-2021, 04:51 AM   #1
New Member
Join Date: Mar 2021
Posts: 2
Body extension?

I was wondering how much of a hassle or how possible it would be to extend the body of a 40 foot bus? I know there will be some money involved, but that's ok. I was just wondering because I could use the extra room. Thanks.

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Old 03-20-2021, 08:15 AM   #2
Bus Nut
Join Date: May 2019
Location: Lebanon, Indiana
Posts: 911
Year: 2000
Coachwork: Winnebago
Chassis: Ford F53
Engine: Ford Triton V-10
Rated Cap: currently 2
Are you talking about extending off the back for add'l living space? Or just need more storage? The cost per square foot to add living space is probably more than you'd expect. You probably need some engineering expertise to ensure it's stable and resilient to whatever weight you load in it - I'm imagining some bodywork hanging out off the back with no framework for support. There's also the safety factor because the added structure becomes the point of impact in a rear end collision which is MORE engineering expertise. There's also added stress to the suspension, it'll change the handling, it may become unpredictable handling if too much weight behind the rear axle counters the weight on the steer axle. It'll counter swing more in turns. And besides all of those considerations, the federal maximum length limit for a motorcoach or RV is 45 feet so if you're starting with a 40 footer you can only legally gain 5 feet of length or 40 square feet total which seems pretty meager given the headaches and expense.

Just my two cents.
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Old 03-20-2021, 09:41 AM   #3
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Join Date: Oct 2020
Location: Florida
Posts: 1,543
Coachwork: Integrated Coach Corp.
Chassis: RE-300 42ft
Engine: 466ci
Rated Cap: 90
You don't have a bus yet, right?
Maybe, shop for a longer bus. Our skoolie is 42'2". Add a rack to the bumper and I max out at 45 feet.

You might consider pulling a trailer behind your conversion. Either RV living space or enclosed storage. Some members here have added slide outs to the rear and sides.

We already had a shipping container and an rv when we added a school bus to our yard. I recommend having onsite storage and restroom facilities before you begin your conversion.
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Old 03-20-2021, 03:51 PM   #4
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Join Date: Dec 2017
Location: Dawsonville, Ga.
Posts: 10,482
Year: 1999
Coachwork: Genesis
Chassis: International
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Rated Cap: 77
Or buy a 45" coach.
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