Accessory dwelling units

A modular ADU
for your property.

Explore a separate living space for family or another locally permitted use. Modbuildr helps connect an ADU's design with the site work, utilities, and approvals your property needs.

Completed single-story Modbuildr accessory dwelling in East Pennsboro Township, Pennsylvania

Completed Modbuildr ADU in East Pennsboro Township, Pennsylvania.

Make room for the people you love

A smaller home
with its own plan.

An accessory dwelling unit, often called an ADU, adds a separate living space to a property with an existing home. A modular design lets you explore a practical layout, personal finishes, and the relationship between the two homes.

Start with how the space will be used: a home for a parent, room for adult family members, or another use the municipality allows. Discuss bedrooms, bathrooms, privacy, entry access, and the way the home will fit into the existing property.

See our East Pennsboro ADU project
Start with feasibility

Three questions
to answer first.

What does the property allow?

Confirm the proposed use and the local zoning and permitting requirements. The home location, setbacks, and any restrictions on an additional dwelling need review before a layout is finalized.

How will the home connect?

Review water, sewer or septic, electrical service, and the foundation. Existing utilities may need additional work; the approach depends on the property and the relevant providers and approvals.

How will the modules arrive?

Consider the delivery route, crane access, trees, existing structures, and space needed around the home. Site access is part of planning the set and the work that follows it.

Owner-led coordination

Bring Jim
your property details.

Modbuildr serves Pennsylvania, Maryland, and Virginia, with Jim Spontarelli coordinating the manufacturer and agreed local work. The scope, cost, and schedule are developed around your particular property.

Share a survey or parcel information, the town and state, property photos, and your ideal layout. Mention whether you already have public utility service or a well and septic system so the right questions can be addressed early.

Understand the full modular building scope

Talk to Jim about an ADU
Your next step

Let’s talk about the home you have in mind.

Have a plan, a property, or just an idea? Start with a conversation with Jim.