Harrison, Hudson County · New Jersey

Can you build an ADU in Harrison, NJ?

An accessory dwelling unit (ADU), a granny flat, in-law suite, or backyard home, can add rental income or family space. Whether Harrison 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.

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Harrison zoning & ADU rules

We have not sourced Harrison's zoning ordinance or its ADU rules yet, so we cannot say what Harrison permits on your lot. That is our gap, not Harrison's. Run your address to see what we hold for it today.

Harrison’s ADU rules, cited

Harrison does not currently permit ADUs by right, so a variance may be needed.

Sources: Town of Harrison Code Title 17 (Land Development Ordinance), Section 17-4 (Prohibited Uses), Section 17-81.4 with Zoning Schedule II-A (Use Regulations, Residential Districts) and Section 17-82.7 (Accessory Structures and Uses). Read 2026-10-03 from the zoneomics mirror of the Municode text and from the 2026-02-17 Mayor and Council agenda carrying Ordinance No. 1555. Section 17-4: 'the establishment of any use not expressly permitted by this Chapter shall be prohibited.' Schedule II-A permits detached single-family dwellings in SF-1 to 3-F, two-family in 2F-1, 2F-2 and 3-F, and lists as residential accessory uses only boarders, sheds and pools, signs, parking and family day care. The replacement Schedule I in Ord. 1555 (introduced 2026-02-17, adding 100% affordable housing) likewise lists no accessory dwelling unit. No ADU or accessory apartment use exists.

See exactly what your lot allows

Accessory dwelling units (ADUs) in Harrison, New Jersey

New Jersey has no single statewide ADU law. Each of the state's 564 municipalities, Harrison (Hudson County, NJ) included, sets its own zoning for accessory dwelling units (granny flats, in-law suites, backyard homes). Whether you can build one in Harrison, how big, and how tall depends on the town's ordinance and your specific lot. We have not sourced Harrison's zoning ordinance yet, so we cannot tell you what Harrison permits on your lot. That is a gap in our record, not a finding about Harrison. What we can do today is measure the lot itself: its dimensions, what already sits on it, and its flood exposure.

Backyard homes that could fit a Harrison lot

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ADU FAQ

Can I build an ADU in Harrison, NJ?

Harrison sets its own ADU rules under New Jersey's home-rule system. Many NJ towns allow ADUs by right in residential zones; some require a variance. We have not sourced Harrison's ordinance yet, so we cannot confirm what it permits. Run your Harrison address and we will show you what we do hold for that lot, and say plainly what we do not.

How much does an ADU cost in Harrison?

A detached ADU in Harrison 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.

Do I need to live on-site to build an ADU in Harrison?

Some NJ towns require owner-occupancy; others (like Jersey City) don't. We check Harrison's specific ordinance for you when you run your address.

See exactly what your Harrison lot allows

Enter your address and we read Harrison’s zoning against your parcel and tell you if an ADU fits, how big, and what it could earn. Free.