Garwood, Union County · New Jersey

Can you build an ADU in Garwood, NJ?

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

See what we hold for your Garwood lot, free

Garwood zoning & ADU rules

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

Garwood’s ADU rules, cited

Garwood does not currently permit ADUs by right, so a variance may be needed.
The owner must live on the property.

Sources: Borough of Garwood Code Chapter 106 (Land Use), Article VIII (Zone Regulations), Section 106-105 (Accessory senior citizen apartments), with the RA, RA-1 and RB zone use lists. Read 2026-10-03 from search-index snippets of ecode360.com/10089816 and ecode360.com/10089216 only (ecode360 returns 403 to a direct fetch; no mirror of 106-105 was found). Says: accessory apartments for senior citizens conforming to 106-105 are permitted accessory uses to single-family dwellings in the RA, RA-1 and RB zones; the unit is a second housing unit within (not detached from) a single-family residence; the qualified senior (head of household over 60 who meets the section's financial conditions) must be the owner-occupant of the primary unit; no additional off-street parking is required, but no unit is permitted where there is no off-street parking; an annual accessory unit license with building and fire inspections is required.

Accessory dwelling units (ADUs) in Garwood, New Jersey

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

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ADU FAQ

Can I build an ADU in Garwood, NJ?

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

A detached ADU in Garwood 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 Garwood?

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

See exactly what your Garwood lot allows

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