Will Winter Weather in Massachusetts Delay My ADU Build?

By Buz Artiano, BuildX | September 2026

Watch: The Creighton Family Built an ADU in 98 Days, Here's the Full Story

You have a quote in your hand, it's October, and you just keep thinking the same thing. If you sign now, does a crew pour a foundation in November and then in December they basically disappear so you're stuck staring at a frozen construction site in your backyard until spring? We get this question a lot during the fall season from people who live on the south shore. They are not so much worried about the snow as they are the idea of losing an entire year on the project while still paying to store a daughter's furniture, and then having to start the conversation all over again in the spring.

My name is Buz Artiano, founder of BuildX. We've built dozens of ADUs all over Massachusetts, mostly on the South Shore and in Plymouth County. We do everything, from the design and permitting to the construction and final walkthrough. So you deal with the same team the whole time. We are the ones who talk to the town zoning officer about setbacks, lot coverage, and septic capacity, and we are the ones standing in your yard in February deciding whether the ground and the weather will let us pour a foundation or not. Winter has a big effect on this business, but it's just a scheduling problem and we solve it every time we sign a job in the fall.

Terry and Abby Creighton are BuildX clients. We built their 900-square-foot ADU above a garage in Plymouth for Abby and her partner Raya, and we were having to build during the roughest winter we've had in years. Terry sat down with us afterward and walked through the entire schedule, including the stage that sat waiting on snow removal.

We always want to tell stories about families who enjoyed working with us, but we're using the Creightons for several reasons. Terry vetted a lot of builders before she hired anyone, and because she is on record saying she was not tracking our day count, and because she's ok with talking about the times when her project stalled and why. That's a lot more useful to you than us just telling you about the finished product.

Did a Massachusetts Winter Delay Our 98-Day Plymouth Build?

Not in total days, here's how it went. We got the foundation in during decent weather, and then it started snowing and didn't stop for a very long time. The garage floor had to wait a bit because unfortunately snowbanks two and three feet deep were standing inside the open garage bay. We caught breaks in the weather when we needed them, got the building framed, and from framing forward the schedule was right on time. Our count on that build was 98 days.

That number needs a qualifier, and I'm going to tell you now rather than have you find it later. Neither Terry nor our team logged a start date and a completion date on paper during construction. She said "I kept telling Michael, I'm not counting. Please don't have your people out here in the blizzard." 98 days is our recollection of that build, not a logged date, and Michael is the project manager she was speaking to.

What matters more for your decision is where the schedule pressure came from. Terry put it plainly: "the pressure to do a hundred days was not coming from me. That was all on you." A homeowner who wasn't even keeping track still had their project finished within the 100 days even during a bad winter. If you're thinking of signing a contract in October, that's what I want you to remember.

Which Stages Stall in Snow and Which Ones Keep Moving?

Three things decide whether the project keeps moving in January. The first is whether the work is open to the sky or dried in. The second is whether the work needs a cleared, dry, workable surface before it can start, which is true of any concrete poured on the ground such as a slab or a garage floor. The third is whether a crew can work through cold and wind or needs a genuinely clear day. Run those three tests against a build schedule and you'll see that winter isn't something to worry about, it just breaks up the build into short stages.

Read that top to bottom and the risk becomes obvious. Everything that happens before the roof is exposed. Everything after it is not affected by weather. A winter build is not slower across the board. It is slower just for one part of the build, once that's done it moves at a normal schedule.

Why Does Everything Before the Roof Carry the Winter Risk?

We want to give you a little more details about the garage, because it catches people off guard. A garage looks like an indoor space on a plan. But it's not an indoor space until the doors are hung and the building is closed up. Until then it's just a walled box with one side completely open to the weather, and snow blows in and piles up the same way it piles up in a driveway. Terry described it when she said "it took a while to get the garage floor laid because there were two foot, three foot snow banks in the garage."

So we always do things in a certain order when we're doing a winter build. We push every open-to-the-sky stage to go in as early and as quickly as possible, and we spend clear days working towards getting everything dried in rather than work on interior stuff that will keep. Foundation first, then framing during whatever breaks the weather gives us. Roof and sheathing as fast as possible after that. Flatwork gets pushed back on purpose, because a slab is the one pour where waiting costs you almost nothing. On the other hand, a delay in framing costs you every job that comes after it. Once the shell of the home is all closed up, the mechanical equipment, insulation, drywall, and finish work is done inside a protected building and the weather no longer has an effect on the project. That's why the Creighton build was right back on schedule after the framing was done. That's not luck, it's by design.

For you, that means the question to ask any builder quoting a fall start is not whether they build in winter. It is what their plan is to get the shell closed as quickly as possible, and which things they will let wait. If they can't answer you with their plan in order, they are going to be improvising in February on your lot, which you don't want.

The 100-Day Clock Is Ours, Not Yours

We call it our 100-day guarantee, and on the podcast that's exactly how the conversation with Terry started. It's the timeframe that we hold ourselves to on the construction phase, and it is the reason our crews were on her lot working in conditions Terry did not expect anyone to work in. Her words were "your teams were out there in all kinds of weather."

What we are not going to do in an article is pretend that their timeline will apply to your specific project. When the day count starts and stops and how design and permitting work around it belong in a conversation about your specific property, so ask us for the current terms directly rather than taking them from a page you read in August. We'll give you the whole thing in writing.

The part that's useful to you isn't the number of days they had to complete the project. It's how the work was structured to accomplish it. Terry made it clear that the urgency was ours, not hers and she told our project manager to stop work during the blizzard. Counting the days only works if the builder is working during that time. If you're the person calling for updates and trying to move the schedule forward the number on the contract doesn't matter.

What Does a Winter Build Ask of You as the Homeowner?

This is the part you don't see when you look at the schedule, and it is the honest cost of a fall start. The Creightons kept Abby and Raya's entire household in a garage bay for seven months, from the fall until the two of them moved in on Mother's Day. Terry parked in the driveway all winter, even in the blizzards. Her story about the day after move-in says it all. Her car went back in the garage, Raya called to ask why the driveway was empty, and Terry had to point out her car hadn't been in the garage for 7 months.

The family was also on the property working through the season. Abby said "every single weekend we were out there all day through the fall and in the winter." A fall start pulls your household into the build in a way a spring start does not, because the disruption happens in the months you're already inside and already dealing with snow.

None of that shows up as a delay, it's an extra strain on the family. We tell everyone to solve the storage and the parking issue before the foundation goes in, not in January when there's a bunch of snow to deal with. Also, to be fair, nobody tracked what the winter conditions cost that project in dollars, so we can't give you a number for that.

When Should You Wait for a Spring Start Instead?

We build ADUs for a living, but that doesn't mean we think you should just sign now. We build through the winter, we staff for it and prepare for it, and signing a job in the fall is good for us because it keeps us busy in our slow months. So take this for what it is worth coming from us: a winter start is not right for every family.

Wait for spring if the disruption is too much for your life. If there's nowhere to put a household's furniture for seven months, if you have one driveway and one car and you're sick of plowing, or if somebody in the house is going to be too anxious about crews working through a storm, the timeframe isn't worth the stress. Terry told our project manager to keep people home in the blizzard, and she was right to say it.

Wait for spring, too, if you can't afford variables and potential short delays due to weather. We can't promise you that there will be no delays or changes to a build in a Massachusetts winter. What we can do is tell you which stages are the riskiest for winter time.

The Case for Signing Before the Snow

The Creightons signed, we built through the roughest winter this region has had in years, and Abby and Raya were living in their new home by Mother's Day. That's the answer to the main question in this article. Winter did not cost that family a season. It cost them a slightly slower stretch between the foundation and the roof, and it cost Terry her garage bay.

So the decision in front of you is not whether a Massachusetts winter affects an ADU build because in some way it always does. The decision is whether you would rather absorb one slow stretch this winter and be finished by spring, or hold the project and start the same clock four months later. The families who move in when the weather is good are the ones who signed when it was not.