Bayonne, Hudson County · New Jersey

Can you build an ADU in Bayonne, NJ?

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

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

Bayonne’s ADU rules, cited

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

Sources: City of Bayonne Code Chapter 35 (Zoning Regulations), Section 35-4.12 (Accessory Buildings and Structures) and Sections 35-5.2 to 35-5.4 (R-1, R-2, R-3 districts). Read 2026-10-03 from the City's own 'Zoning Permit Information for Accessory Buildings and Structures' PDF (bayonnenj.org), which reproduces Section 35-4.12 verbatim, and from the ordinance.com mirror of the R-1/R-2/R-3 district text. Section 35-4.12a.5: 'No accessory building structure or part thereof, shall be used for dwelling purposes' (Ord. No. O-95-12). The R-1, R-2 and R-3 use lists enumerate no accessory apartment or accessory dwelling unit; R-1 accessory uses are sheds, pools and private garages only.

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Accessory dwelling units (ADUs) in Bayonne, New Jersey

New Jersey has no single statewide ADU law. Each of the state's 564 municipalities, Bayonne (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 Bayonne, how big, and how tall depends on the town's ordinance and your specific lot. We have not sourced Bayonne's zoning ordinance yet, so we cannot tell you what Bayonne permits on your lot. That is a gap in our record, not a finding about Bayonne. 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 Bayonne lot

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ADU FAQ

Can I build an ADU in Bayonne, NJ?

Bayonne 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 Bayonne's ordinance yet, so we cannot confirm what it permits. Run your Bayonne 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 Bayonne?

A detached ADU in Bayonne 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 Bayonne?

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

See exactly what your Bayonne lot allows

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