An ADU — accessory dwelling unit — is a smaller, self-contained living space on the same property as your main home, sometimes called an in-law suite or backyard cottage. ADUs work well for multigenerational families, guests, or anyone who needs separate space nearby.
What an ADU is — and is not
An ADU is a real, self-contained living space: its own entrance, living area, and amenities. It can be detached, like a backyard cottage, or attached to the main home.
For growing and multigenerational families, an ADU offers closeness without sharing every room — a common need in North and Central New Jersey households.
Is your property a fit?
Whether an ADU works depends on your property and your municipality's rules, which vary from town to town. The first step is a conversation about your lot and what you want the space to do.
Sampson Development Group builds accessory dwelling units across the region and can talk through what your property allows.
Explore an ADU for your property
Planning a renovation? Call Sampson Development Group at (908) 220-4681 or request an estimate. We serve Hillside and 16 surrounding communities across North and Central New Jersey — and you can save 10% in November and December 2026.
Frequently asked questions
Can I build an ADU in my town?
Rules vary by municipality. Tell us where you live when you request an estimate and we can discuss your property.
Who typically uses an ADU?
Multigenerational families, homeowners hosting long-term guests, and anyone needing a separate, self-contained space on their property.