2 Best ADU Builders in Princeton, New Jersey
Verified ADU contractors and builders in Princeton, NJ
Showing 1–2 of 2 listings
GardenStateADU
New Jersey ADU Builder offering 48-hour zoning check, permit-ready plans, and turn-key construction. They navigate New Jersey zoning boards and master the municipality-specific rules for ADU projects.
R.B. Homes
R.B. Homes is a family-owned business founded by Roman Barsky in 1995. In that time, we have built more than 200 homes in the Princeton, NJ. area. We also buy and sell residential and commercial property throughout New Jersey, with a focus on Princeton, Princeton Junction and Hopewell.
Frequently Asked Questions — ADU Builders in Princeton
How much does it cost to hire an ADU builder in Princeton?
ADU construction costs in Princeton, New Jersey vary widely depending on size, type, and site conditions. Detached ADUs typically range from $150,000–$400,000+, while garage conversions and attached ADUs can be more affordable. Contact multiple builders in Princeton to get accurate quotes for your specific project.
How long does it take to build an ADU in Princeton?
In Princeton, the ADU construction timeline typically ranges from 6 to 18 months from permit application to move-in. Permitting alone can take 2–6 months depending on New Jersey local regulations. Prefab and modular ADUs often have faster timelines than site-built units.
Do I need a permit to build an ADU in Princeton?
Yes, a building permit is required for ADU construction in Princeton, New Jersey. Your ADU builder will typically handle the permit application as part of their service. New Jersey has adopted streamlined ADU permitting laws in recent years, which may reduce wait times.
What types of ADUs can be built in Princeton?
Common ADU types in Princeton include detached ADUs (backyard cottages), attached ADUs, garage conversions, basement conversions, and prefab/modular ADUs. The best type for your property depends on lot size, zoning, and budget. A local Princeton ADU builder can advise on what's allowed on your specific parcel.