Your property
Checking what the rules allow in your town. This takes a few seconds.
An accessory dwelling unit (ADU), a granny flat, in-law suite, or backyard home, can add rental income or family space. Whether Alpha allows one, and how big, comes down to the town’s zoning and your specific lot. Here’s what we know, and how to check yours.
We've mapped Alpha's residential zoning. An ADU on your lot follows the town's accessory-structure standards: check your specific address for the exact size, height, and setback it allows.
Source: Chapter 410 Article III Section 12 · https://ecode360.com/6790739 (via Composite Zoning 2024 (NJ), ArcGIS FeatureServer, accessed 2026-08-11)
New Jersey has no single statewide ADU law. Each of the state's 564 municipalities, Alpha (Warren County, NJ) included, sets its own zoning for accessory dwelling units (granny flats, in-law suites, backyard homes). Whether you can build one in Alpha, how big, and how tall depends on the town's ordinance and your specific lot. We've mapped Alpha's residential zoning: buildings are capped around 35 ft / 2.5 stories, with a minimum lot area near 9,375 sf. Your ADU follows the town's accessory-structure standards on top of that.
Our proven designs, each fitted to your lot, then made yours (trim, color, layout). Photorealistic renderings of the real thing, not stock photos.
Explore all modelsAlpha sets its own ADU rules, and we've mapped its residential zoning. Whether your specific lot qualifies, and how big an ADU it allows, comes down to your parcel's size, setbacks, and the accessory-structure standards. Check your Alpha address to see for sure, free.
A detached ADU in Alpha typically runs $150,000 to $300,000+ all-in depending on size, site, and finishes. Because the build is financed, you can add rental income to your Alpha property without paying the build cost up front, and the rent helps carry the loan.
Some NJ towns require owner-occupancy; others (like Jersey City) don't. We check Alpha's specific ordinance for you when you run your address.
Enter your address and we read Alpha’s zoning against your parcel and tell you if an ADU fits, how big, and what it could earn. Free.
Check if your Alpha lot qualifies, free
