The only way to really know is to remove the front of the soffits to see what is inside. Just making several exploratory holes can sometimes be a gamble! In my parents first kitchen, the GC made a couple of holes, but still missed the sewer pipe from one of the upstairs bathrooms. New kitchen cabinets had already been designed/ordered with the soffit removed. It was a pain to reroute the pipe, but it got done.

You can buy an endoscope type of camera for $35 online. A tiny camera and light on a long flexible gooseneck, sends image to your phone via WiFi. Awfully useful. Here, you could drill a few small holes then stick the camera in and look around. I think those soffits are pretty inoffensive, I wouldn’t go to a lot of trouble to remove them.

I have similar in my early 60’s MCM kitchen and dining room that was totally remodeled about 7 years ago by the previous owner. Mine is a little deeper,think it contains duct work. Fortunately for me, the previous owner re did the kitchen in period correct flat panel cabinets .

Thanks all. Was just wondering if this was something common in 50s ranch MCM. Will definitely do exploratory holes when we get to that point. Thanks John for the idea of the endoscope. I need to get one of those....as well as a laser with a tripod for checking low and high spots. Thanks again for all the input guys!

Is there a bath upstairs? I’ve run into plumbing P traps dipping down below the ceiling plane, before they joined up to the stack in the wall. Most of the time, the soffit was able to be removed, and the cabinet notched, to fit the P. Occasionally, they needed to run a bit at the 1/4” per foot before joining a stack. Those kept a shallow soffit.

From what I can see they spent money and time to build around it on thta one side so obviously a reason . I have actually seen lots of MCM omes that had soffits for no other reason than to avoid spending money on taller cabinets but you will not know until you take the plunge .

@apple_pie_order
I wanted to find the original plans/permits for my home and my parents home (both built in the 1960s. Went to city hall where they informed me that we didn't start collecting that information until the mid 1970s. They have no records for the homes built prior to that. You bought the land and the architect and builder worked out the details. As long as the land was zoned residential and you were building a house that was that.

There is a reason it's there. I'm betting a pipe is back there, especially if you have any rooms upstairs. The other option is a pipe for venting something like the oven. It's too small to be hiding an AC duct, so my guess is pipe.

It is a soffit and is concealing plumbing, electrical wires, etc while looking streamlined.

And, yes, it is there for good reason.