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An accessory dwelling unit (ADU), a granny flat, in-law suite, or backyard home, can add rental income or family space. Whether Neptune Twp 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 Neptune Twp'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: Neptune Twp LDO Schedule B, zone R-1: min lot 12,500 sf, max density 3.40 du/acre, min width 100 ft, min depth 125 ft, front 35 ft, side 10 ft (combined 25 ft), rear 35 ft, building cover 25%, total…
Sources: Neptune Ord. 26-19, subsection C.1: 'Maximum ADU size shall not exceed 800 square feet or 50% of the primary dwelling's size, whichever is less.'; Neptune Ord. 26-19, subsection E.1: 'Detached ADUs may not exceed 24 feet in height.' E.2: 'Attached ADUs must not exceed the height of the primary dwelling.'; Neptune Ord. 26-19, definition 2: 'Accessory Dwelling Unit (ADU): A self-contained residential unit, either attached to or detached from a primary dwelling, that includes independent living, sleeping, cooking, and sanitation facilities.'
See exactly what your lot allowsNew Jersey has no single statewide ADU law. Each of the state's 564 municipalities, Neptune Twp (Monmouth County, NJ) included, sets its own zoning for accessory dwelling units (granny flats, in-law suites, backyard homes). Whether you can build one in Neptune Twp, how big, and how tall depends on the town's ordinance and your specific lot. We've mapped Neptune Twp's residential zoning: buildings are capped around 35 ft / 2.5 stories, with a minimum lot area near 12,500 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 modelsNeptune Twp 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 Neptune Twp address to see for sure, free.
A detached ADU in Neptune Twp typically runs $150,000 to $300,000+ all-in depending on size, site, and finishes. The build is financed and the rent helps carry the loan. You own the home.
Some NJ towns require owner-occupancy; others (like Jersey City) don't. We check Neptune Twp's specific ordinance for you when you run your address.
In Neptune Twp, an ADU can be up to 800 sq ft, or 50% of the main house, subject to your lot's size, coverage, and setbacks. (Source: Neptune Ord. 26-19, subsection C.1: 'Maximum ADU size shall not exceed 800 square feet or 50% of the primary dwelling's size, whichever is less.'.) Run your Neptune Twp address to see the exact size your lot allows, free.
Enter your address and we read Neptune Twp’s zoning against your parcel and tell you if an ADU fits, how big, and what it could earn. Free.
Check if your Neptune Twp lot qualifies, free
