Should You Connect Your ADU to a Garage with a Breezeway?

By Buz Artiano, BuildX | July 2026

Watch: 725 Sq Ft ADU Tour: Bourne, MA Breezeway, Private Deck, and Custom Finishes

You want your parent to be close but they need their own space too. You want them to be able to go from the car to their front door without having to go across the yard in bad weather. But you also don't want to attach the ADU physically to the garage or the main house, because then they don't have any privacy anymore. Also, if the ADU is attached it might cut into the amount of square footage you're allowed to build. You might sacrifice size for a covered access and privacy but a breezeway is a way to have everything.

My name is Buz Artiano, and I am the founder of BuildX. We've built dozens of ADU projects across Massachusetts, mostly around the South Shore and Plymouth County areas. We are the only team you need. We do the design, permitting, and construction. So we see every phase of a project from the first site visit up until you move in. We evaluate septic constraints, zoning issues, utility connections and the requirement to get a permit from the city.

A breezeway seems like a very small detail, but it's actually a big decision that has to do with privacy, daily access, accessibility, and your square-footage all at one time. During an ADU project in Bourne, we connected a detached ADU to the garage with an open overhead breezeway, just a roof with no walls, because the client asked for it. We built that unit for Charlene, so she could park in the garage and walk to her front door without going out into the weather. Here's how to decide whether you want a breezeway on your property, and the advantage that most people don't think about.

Is a Breezeway the Right Way to Connect Your ADU to the Garage?

For a lot of detached ADUs, it's perfect. A breezeway is just a covered walkway, with a roof that goes between two buildings. You can leave the sides open or you can add walls. But the idea is that it gives you a dry, shaded place to walk between the garage and the ADU without having to attach the ADU to the garage or the house.

When we worked on the Bourne project we decided to connect the garage to the ADU with a breezeway that had no walls. Since we built the ADU for Charlene, she's the one that decided that we should do it that way. There's a back door from the garage that leads to the covered walkway, so she can drive into the garage, go right out the back door, and walk straight into her house in the shade and without ever getting rained on. We also moved the original garage door and put it in the middle of the breezeway, so there's a direct way to get to the breezeway without having to go out a side door and then walk around the building.

What Do You Get from Covered Access Between the Garage and the ADU?

The best part is that you won't get rained on when you're bringing in groceries or laundry, and someone with a walker or a cane won't have to worry about slippery rain or ice. A covered breezeway makes the trip from the car to the front door protected every day of the year, which matters a lot for most of the people we build ADUs for.

The breezeway also makes it so the garage is useful to the ADU. Parking, storage, and the utility space in the garage all stay covered and easier to get to from the ADU instead of it being way across the yard that might be slippery. It's for comfort, but it's also very much for safety as well, and that's why a breezeway is usually better than just a plain detached ADU for someone who's aging.

Attached, Detached, or Breezeway: Which ADU Connection Fits You?

There are three common ways to connect the ADU to the rest of the property, and each one deals with privacy, covered access, and size differently. An attached ADU will have a shared wall with a garage or the main house. A fully detached ADU is on its own with no actual connection. A breezeway-connected ADU is detached but adds a covered walkway to the garage. We made a table so you can see how each choice deals with the 3 things families think about the most.

When people can't decide between detached and attached we tell them that privacy is the single thing our customers care about most. That's why we encourage a detached ADU whenever it's possible. The one real problem with a detached unit is the walk outside through the yard. When the weather's bad, that's the thing an older parent will complain about, and the adult child has to worry about their mother or father crossing a yard that's slippery and dangerous. A breezeway gets rid of that worry without having to give up the separation. You can have two separate homes, and still solve the only comfort issue that separate layouts have. That's something that comes from building so many ADUs. We know just where people struggle once they move in.

Does a Breezeway Count Against Your ADU Square Footage?

A lot of times people don't think about this, but sometimes it can actually take away from the size of the ADU you're allowed to build. Massachusetts ADU rules say that a breezeway is usually exempt from the square footage calculation. Basically, the covered walkway you put between the garage and the ADU usually doesn't take up any of the square footage you can build, so you get covered access and it won't take away from your living space.

But you have to be careful because the exemption is true in most towns, but not in every town or every situation. So you need to check and see how your town deals with a breezeway before you make the final decision on a design. Also, the by-right ADU law sets the framework, but local building code, health code, and dimensional rules still apply, which is why the town approval is important. You can review the state ADU requirements at mass.gov, and we double check and confirm everything with the local building department on all of our projects before we finalize any plans, just to be sure.

Should Your Breezeway Have Walls or Stay Open?

You have a real choice here, and it will change how the connection feels. On the Bourne project our client wanted a roof overhead and nothing more. She didn't want walls on either side, and that was her decision. But we could have just as easily enclosed it with walls on both sides, which gives you more protection from bad weather. But with walls it is more of an outdoor hallway, without the open airy feeling. An open breezeway keeps the two buildings separate but lets in light and air. An enclosed breezeway will keep out wind and rain but could start to seem like a part of the house rather than just a walkway. Either option is great. It just depends on whether you want an exposed path and how much you prefer openness over full weather protection.

Accessibility is an important thing to consider as well. We kept the steps up into the breezeway to a minimum, and we planned the connection so it could be turned into a ramp later if needed. If you plan the covered path with that in mind it will be much cheaper than rebuilding the whole thing later on, and for an ADU built for an aging parent, it's the difference between an ADU that works for five years and one that works for twenty.

When a Breezeway Doesn't Make Sense

Yes, of course we can build you a breezeway, but honestly, we don't recommend them for every ADU. A breezeway only works when the garage and the ADU are lined up a certain way. Otherwise you'd end up with a covered path that's long and awkward looking, instead of a short and straight one that looks neat. It also has to fit on your lot and within the setback limits, because it technically takes up space on the lot. And some people just want a fully separate unit that's not connected to the garage at all, in which case a plain detached ADU is better.

We start all these discussions with privacy first, then how the person will actually get from the car, the garage, and their front door. If a breezeway works for both, we build it. If it doesn't, we will tell them.

Ready to Map a Covered Path from Your Garage to Your ADU?

For families who want a parent close but independent, a breezeway is often the way that will keep the ADU detached, give a protected walk from the car, and doesn't cost you square footage. The right choice depends on how your garage, your lot, and your ADU location line up, and that is something best judged on the actual property.