garage floor no step to living area floor?

can I build garage floor same elevation as rest of house—no step?
can I build garage floor same elevation as rest of house—no step?
There are lots of ways to minimize air leakage and improve energy efficiency, even in an older home.
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Replies
Yes where I live.
I split a 20 x 40 garage to make a 20 x 20 garage on one end and a 20 x 20 room that is attached to the house.
The city said I needed a 3 -1/2 high and wide (at least) concrete curb to prevent spilled gas and other liquids from getting into the room. I drilled a 1/2" hole in the slab and epoxied galvanized anchor bolts into the hole. I cut it to length so the top of the threaded end would be about 4-1/2" above the concrete curb's top. I did this every 3 feet, but I think 6' is enough. Check your local rules. (You could also use and expanding anchor bolts.)
When it was cured, I built the wall on the curb with foam between concrete and wood.
Thanks--so--you end up with a curb between areas?
that,s what did in boiler HVAC room-that I put in the garage for code.
I guess I was hoping for a way to have a flat floor for wheelchair use--
You should be able to do this. I’ve done it for multiple projects. My code authority allows for it. You will need to have a door that seals and separates the garage from the house. We usually install after market threshold extensions that are tapered to allow for roiling over more easily. If you have a custom door being built they can probably build a wheelchair accessible threshold, but that will be a pricey item. Or you may find you can wheel over standard threshold with little effort. They allow for the wall (curb as you are saying) to have a door cutout, but should check with code authority first.
Most building codes are based on the International Residential Code. Years ago there was a requirement for a vertical separation between garage and living area, but it went away- I think with the 2009 version. Depending on where you live, the base IRC code may be adjusted by your state, or local jurisdiction. In NY, no vertical separation is required.
I have no experience with this or what the code requirements are, but it seems like a channel drain would be a perfect solution.
When I researched this in 2016 I found there's no specific requirement for a step or a curb, but the floor should be sloped down towards the exterior doors.
Thanks-- I need to check with my town--