Digging In: What Excavation Really Looks Like on a Custom Home Build

The Modern Tudor — Behind the Build

There is a moment on every ground-up build that changes the feeling of the entire project. The site is cleared, the plans are approved, and then the first machine breaks ground. Suddenly a set of drawings becomes a hole in the earth, and for the first time, the home starts to feel real.

That moment is excavation. And while it might look like heavy equipment moving dirt from one place to another, what is actually happening beneath the surface of a well-run excavation is precise, technical, and consequential for every single phase that follows.

On the Duxbury project, we are building a Modern Tudor. A home that draws from the rich architectural language of traditional Tudor design while embracing cleaner contemporary proportions and materials. Steeply pitched rooflines, textured facades, arched detailing and warm natural materials will define this home's character. But none of that happens without the ground beneath it being prepared with the same level of care and intention.

What we are actually building toward

Understanding excavation requires understanding what it is preparing for. A custom home of this scale and style requires a full foundation system, typically a poured concrete foundation with a full basement or crawl space depending on the design. The foundation is what the entire structure sits on, and the excavation defines its shape, depth, and relationship to the surrounding land.

For a Modern Tudor in a coastal New England town like Duxbury, there are specific considerations that shape how excavation is approached. The water table, soil composition, proximity to wetlands, and local drainage patterns all inform how deep we dig, how we manage groundwater during construction, and what kind of waterproofing system the foundation will require. None of these decisions are made on the fly. They are the result of soil testing, engineering review, and a site evaluation done long before the first machine arrives.

Reading the site before touching it

The excavation phase begins before a single bucket of earth is moved. Our team walks the site and marks the layout of the foundation precisely according to the engineered plans. Batter boards are set at the corners to establish exact reference lines that will guide the entire dig. Utility lines are located and flagged. Erosion controls are checked and reinforced so that displaced soil does not migrate onto neighboring properties or into drainage channels.

In Massachusetts, excavation near wetlands or coastal areas requires additional permitting and oversight. Duxbury's proximity to the bay means that stormwater management is taken seriously at every phase of the build. Getting this right from the start is not optional. It protects the site, the neighboring properties, and the long-term performance of the finished home.

The excavation itself

Once the layout is confirmed and everything is in place, excavation begins in earnest. On a project of this size, that typically involves a combination of an excavator for the bulk earthmoving and a smaller machine for detail work close to the layout lines.

The dig proceeds to the engineered depth, which on a New England build must extend below the frost line. In Massachusetts, that means a minimum depth of 48 inches below grade to prevent the foundation from shifting during freeze and thaw cycles. For a basement foundation, the total depth of excavation goes significantly further.

As soil is removed it is either stockpiled on site for later use in backfill or hauled away, depending on its quality and composition. Expansive or unstable soils are not suitable for backfill around a foundation and need to be replaced with clean gravel that drains well and compacts properly. On a site like Duxbury that had significant root systems from tree stump removal in the previous phase, this kind of soil assessment is especially important.

Footings: the foundation of the foundation

Once the excavation reaches the correct depth, footing forms are installed. Footings are the wide, flat concrete pads that the foundation walls sit on. They distribute the weight of the entire structure across the ground below and must be sized and reinforced according to the engineering specifications for this particular home.

Before any concrete is poured, the local building inspector visits the site for a footing inspection. This is one of the most critical inspections in the entire build. The inspector confirms that the footing dimensions, depth, and reinforcing steel all comply with the approved plans and the building code. Nothing is poured until that inspection is passed and documented.

This is not a formality. It is the system working as it should. A footing poured incorrectly cannot be adjusted after the fact without enormous cost and disruption. Getting it right at this stage is what allows everything above it to perform as designed for the lifetime of the home.

Why the Modern Tudor makes this phase especially meaningful

There is something fitting about the excavation phase on a Modern Tudor. Tudor architecture has always been rooted in the idea of permanence. Homes built to last generations, with materials and craftsmanship that age with beauty rather than deterioration. The original Tudor homes of England were often built on foundations of stone that are still standing centuries later.

What we are doing in Duxbury is a contemporary version of that same commitment. The foundation going into this lot is engineered, inspected, and built to last not just for the current owners but for every owner who lives here after them. The Modern Tudor aesthetic that will eventually define this home above grade starts with decisions made below grade, where no one will ever see.

That is exactly how we think about every phase of this build.

What comes next

With excavation complete and footings poured, the next phase is foundation walls. The shape that currently exists as a carefully formed hole in the ground will soon begin to rise. The Duxbury Project is moving.

Follow along on Instagram for real-time updates as each phase unfolds.

Somma Builders is a licensed general contractor serving Greater Boston and the South Shore, specializing in custom homes, full renovations, and design-build projects. Follow The Duxbury Project series for a behind-the-scenes look at a ground-up Modern Tudor build in Duxbury, MA.