New Jersey's Accessory Dwelling Unit Bill: What Monmouth County Homeowners Need to Know About S1786

By Ryan Skove, ABR, SRS, PSA | Middletown Township Housing Commissioner | Published August 2026

New Jersey has a bill on the table that would change how every homeowner in Monmouth County thinks about their basement, garage, and backyard. Senate Bill S1786 — the Accessory Dwelling Unit Development Act — would require most New Jersey municipalities to allow homeowners to build a second, independent living space on their existing lot, and to approve compliant applications without a public hearing. It has cleared its first Senate committee with amendments and is now sitting in the Senate Budget and Appropriations Committee. It is not law yet. But it's moving, and the version currently under consideration is different — and more homeowner-friendly — than the one first introduced. Here's what's actually in it, where it stands, and what it would mean for towns like Red Bank, Middletown, Rumson, Little Silver, Fair Haven, Oceanport, Shrewsbury, and Long Branch if it passes as written.

Where the Bill Stands Right Now

S1786 is sponsored by Senators Troy Singleton (D-7) and Britnee Timberlake (D-34), with Senator Wimberly as co-sponsor. On June 1, 2026, the Senate Community and Urban Affairs Committee reported the bill out favorably with amendments — the "First Reprint" version, which is what this article is based on. It was then referred to the Senate Budget and Appropriations Committee, where it currently sits. As of this writing, there is no companion bill in the Assembly.

Milestone	Status
Introduced	Pre-filed for the 2026 session
Senate Community & Urban Affairs Committee	Reported with amendments, June 1, 2026 (First Reprint)
Senate Budget and Appropriations Committee	Pending
Full Senate vote	Not yet scheduled
Assembly companion bill	Not yet introduced
Governor's signature	N/A — bill has not reached the Governor

In plain terms: this is a real bill with real momentum, but it still needs to clear Senate Budget and Appropriations, pass a full Senate floor vote, move through a companion bill in the Assembly, and be signed by the Governor before any of this is enforceable. Bills move on their own schedule — sometimes for months, sometimes they stall entirely. I'll update this page as it moves; treat everything below as "what's proposed," not "what's the law today."

What Counts as an ADU Under This Bill

The bill defines an accessory dwelling unit as a residential unit that provides complete independent living facilities — living, sleeping, eating, cooking, and sanitation space — for one or more people, on the same lot as a primary single-family or two-family home. That's a real, self-contained home, not a bedroom with a hot plate.

Under the bill, an ADU can take four physical forms:

Configuration	What It Looks Like
Internal	A basement, attic, or in-law suite built inside the existing home
Extension	An addition built onto the primary dwelling
Accessory Structure	Space carved out of an existing garage, barn, or outbuilding
Detached	A standalone structure built elsewhere on the same lot

Why Trenton Is Pushing This

The bill's own findings lay out the reasoning plainly: New Jersey has a housing shortage that spans every income level, affecting the ability of young adults, seniors, veterans, people with disabilities, students, and workers to find homes near family and jobs. ADUs are framed as an underused tool to add housing on land that's already developed — without changing a neighborhood's basic character — while giving homeowners a way to house a parent or adult child, or generate rental income, without giving up their privacy or their single-family lot.

It's a straightforward trade the state is making: in exchange for standardized, statewide rules, municipalities give up most of their discretion to say no.

The Rules Every Covered Town Would Have to Follow

This is the heart of the bill. If your municipality is "covered" (more on that below), it cannot prohibit or restrict ADUs — full stop — and its local ordinance is required to include these baseline standards:

Standard	Requirement Under S1786
Lot eligibility	Must be zoned for single-family or two-family use, unless local zoning permits ADUs elsewhere too
Minimum size	Whatever square footage the State Uniform Construction Code sets as the minimum for complete independent living facilities
Height	Cannot exceed the height of the primary dwelling
Setback	At least 5 feet from side and rear property lines
Parking	Municipalities cannot require any additional off-street parking
Fire sprinklers	Not required for an internal or extension ADU if the primary home itself isn't required to have them
Rental term	Cannot be rented for less than 30 days — short-term rentals are banned outright

What Your Town Can Still Decide

Municipalities aren't stripped of all control. A local ordinance may still include:

• Reasonable landscaping standards for detached ADUs
• Architectural review for properties in a designated historic district, if new construction or exterior changes are involved
• The same dimensional controls — setbacks, lot coverage, and the like — that already apply to the primary dwelling, except density controls, which cannot be used to block an ADU

Worth noting: an earlier version of the bill would have capped a detached ADU at 60% of a lot's "buildable area." That cap was removed in the current draft.

The Fast-Track Approval Process

This is where the bill really changes the experience of building an ADU. Under current law, plenty of towns route additions like this through a zoning board, a public hearing, and months of uncertainty. S1786 replaces that with what's called ministerial review — think of it less like asking a board's permission and more like renewing a driver's license. The reviewer isn't deciding whether you should be allowed to build; they're confirming your paperwork meets the checklist. No public hearing, no discretionary judgment call.

Once you submit a complete application — a description of the unit, a floor plan, and (for detached units or additions) a property survey — the municipality has 60 days to issue a written decision. Miss that window, and the application is automatically deemed approved unless you agreed to extend it. If it's denied, the town has to explain exactly why and how to fix it.

And if a town denies an application, or tacks on conditions that go beyond what the bill allows, the current draft gives homeowners something the original version didn't: a direct appeal to the Commissioner of the Department of Community Affairs. If the Commissioner agrees the municipality was out of line, the town — not the applicant — pays the legal costs. That's real teeth behind the ministerial-review requirement.

Rental Rules and Utility Costs

Issue	What S1786 Says
Short-term rentals	Prohibited — units built under the Act cannot be rented for less than 30 days
Utility hookup (internal/extension ADU)	No separate connection or fee required, unless built alongside a brand-new primary home
Utility hookup (detached ADU)	A separate connection can be required, but the fee cannot exceed half of what a new primary dwelling would be charged
Existing nonconforming conditions	A town cannot hold your ADU application hostage to an unrelated zoning violation elsewhere on the property
Certificate of occupancy	Can't be issued for the ADU before the primary home has its own CO

If You're in an HOA or Planned Community

Homeowners in a planned real estate development aren't exempt, but the rules bend a bit. Your municipality or your HOA/common interest association can still enforce reasonable regulations around stormwater, utility capacity, fire and emergency access, parking allocation on private streets, protection of common elements, architectural standards consistent with your governing documents, and a fair allocation of any added common expenses. What they can't do is use those powers to prohibit, unreasonably restrict, or materially delay an ADU that otherwise complies with the Act.

What This Means for Monmouth County

Here's the piece that actually determines whether your town has a choice in the matter: population density. Under S1786, a municipality with fewer than 9,000 people per square mile must authorize ADUs — no local opt-out. A municipality at or above that line only has to allow them if it already adopted a qualifying ADU ordinance before the bill takes effect.

Red Bank is the densest of the towns I work in day-to-day — roughly 12,900 residents packed into 1.75 square miles, which works out to about 7,400 people per square mile. That's still comfortably under the 9,000 threshold. Every other town in my core coverage area — Middletown, Little Silver, Rumson, Fair Haven, Oceanport, Shrewsbury, and Long Branch — is less densely built than Red Bank. Unless one of these towns already has a qualifying ADU ordinance on the books from before January 1, 2025 (worth a call to your municipal clerk to confirm), it's a safe bet that essentially every town on the Bayshore and along the Navesink and Shrewsbury Rivers would fall into the "must allow" category if this passes as written.

The PSA Perspective: What I'd Tell a Client Today

Frequently Asked Questions

Is New Jersey Senate Bill S1786 law yet?

Not yet. As of August 2026, S1786 has been reported out of the Senate Community and Urban Affairs Committee with amendments and referred to the Senate Budget and Appropriations Committee. It still needs to pass a full Senate vote, move through a companion bill in the Assembly, and be signed by the Governor before it takes effect. Its progress should be confirmed before relying on any specific provision.

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What qualifies as an accessory dwelling unit under S1786?

A residential unit with its own complete independent living facilities — living, sleeping, eating, cooking, and sanitation space — located on the same lot as a single-family or two-family primary home. It can be built inside the primary home, as an addition, inside an existing accessory structure like a garage, or as a new detached structure.

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Will my Monmouth County town be required to allow ADUs?

Almost certainly, if the bill passes as currently written. Any municipality with fewer than 9,000 people per square mile must authorize ADUs, and most Monmouth County shore towns — including denser boroughs like Red Bank — fall well under that line. Denser municipalities elsewhere in the state only have to comply if they've already opted in with their own qualifying ordinance.

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Can I rent out an ADU as an Airbnb or short-term rental?

No. S1786 explicitly bans renting an ADU built under the Act for less than 30 days, and municipalities are permitted to set their own penalties for violations.

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How long would municipal approval take under the new rules?

Once a complete application is submitted, the municipality has 60 days to issue a written decision. If it doesn't act in that window, the application is automatically deemed approved. Approval is meant to be a ministerial, paperwork-verification process rather than a public hearing.

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Does my town still get to require extra parking or a public hearing?

No, on both counts. Municipalities are barred from requiring additional off-street parking for an ADU, and applications are reviewed as a ministerial action without a public hearing — review is limited to confirming the application meets the bill's standards.

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How much value could an ADU add to a home in Monmouth County?

It depends heavily on the specific property, configuration, and local demand for multi-generational or rental flexibility, so there's no single number to point to. What I can say is that buyers are increasingly asking about exactly this kind of flexibility, and a legal, well-built ADU is a genuine differentiator in a listing regardless of where this bill ends up.

This article summarizes pending New Jersey legislation for informational purposes and is not legal advice. Bill status, provisions, and municipal density figures should be independently confirmed before you act on them — check with your municipal clerk or an attorney for guidance specific to your property.