ADU Pass
Clinton
ADU Pass helps homeowners in Clinton, Hunterdon County, New Jersey navigate the permit paperwork for building an accessory dwelling unit. This area covers 1 ZIP code.
Map
ADU details
ADU legality: allowed
New Jersey preempts most local ADU restrictions. Clinton permits ADUs by right in single-family zones per its zoning ordinance.
Cost scenarios
| Scenario | Sq ft | Permit | Build | Total |
|---|---|---|---|---|
| minimum | 150 | $2,900 | $47,250 | $50,150 |
| 600 | 600 | $2,900 | $189,000 | $191,900 |
| midpoint | 675 | $2,900 | $212,625 | $215,525 |
| maximum | 1,200 | $2,900 | $378,000 | $380,900 |
Fee breakdown (as of 2026-04)
Permitting process
- Highlands Act overlay screening (~14d)
Confirm parcel's status: Town of Clinton sits in Highlands Planning Area (less restrictive than Preservation Area). Determine if parcel falls in Highlands Open Waters buffer (300 ft from Spruce Run / South Branch Raritan River). Highlands Council Plan Conformance documents may apply. - Chapter 165 zoning permit (~21d)
Submit Zoning Permit application to Town of Clinton Zoning Officer at Town Hall, 43 Leigh Street. Confirm zone (R-Residence, B-Business, or BC-Business Center along Main Street); confirm setbacks, lot coverage, accessory-use limits. NJDCA model ADU rules apply by default if Chapter 165 silent. - Septic / water allocation review (non-sewered parcels) (~35d)
Parcels not on municipal sewer require Hunterdon County Health Department septic review under Highlands RMP density limits (typically 1 unit per 25-88 acres in Preservation Area; lower thresholds in Planning Area). Wells require Hunterdon County Health well permit. - UCC construction permit submittal (~1d)
Submit NJ UCC F-100 plus electrical, plumbing, fire subcode technical sections to Town of Clinton Construction Code Office (shared service with Lebanon Borough). NJ UCC permit triggers building, electric, plumbing, fire reviews concurrently. - UCC subcode plan review (~25d)
Building subcode reviews under IRC 2021 with NJ amendments. Small municipality - reviews handled by part-time subcode officials; statutory 20-business-day window applies. Highlands Planning Area parcels may need additional Highlands Council pre-construction review for major site disturbance. - Permit issuance and DCA fees (~7d)
Town of Clinton UCC fees: minimum permit + $0.040/cubic foot building volume; DCA training fee $1.70/$1000 valuation. Pay at Town Hall. - Construction with subcode inspections
Required UCC inspections: footing/foundation, plumbing rough, electrical rough, framing, insulation, fire stopping, plumbing final, electrical final, building final. Schedule via Town of Clinton Construction Code Office. - Certificate of Occupancy (~7d)
On final inspection, UCC Certificate of Occupancy issues. Required for legal occupancy and rental. Highlands Council may verify post-construction conformance for parcels under major project review.
Viability (permitted uses)
- Long-term rental: yes Long-term rental of ADU explicitly permitted; New Jersey owner-occupancy preemption (where applicable) makes ADU eligible for full landlord-tenant treatment.
- Short-term rental: with-restrictions STR rules vary by city. Clinton regulates STRs separately from ADU permitting; check local STR ordinance and HOA covenants.
- Office rental: with-restrictions Detached office rental requires home occupation permit or rezoning.
- Home office: yes Home occupation permitted with restrictions on signage and customer traffic.
- Studio / workshop: yes Personal artist studio is a permitted accessory use.
- Agriculture: with-restrictions Limited urban agriculture permitted in residential zones; livestock varies by district.
- Relative support: yes Family-occupancy ADU explicitly permitted in single-family zones.
Contacts
Staff: Town of Clinton Zoning Officer (Zoning Permit administration (Chapter 165)), Town of Clinton Construction Code Office (UCC Construction Official (shared service)), Hunterdon County Health Department (Septic / well permits (Highlands RMP)), NJ Highlands Council (Highlands Planning Area pre-construction review)
Utilities
- Water: Clinton Water Utility · 21d connect · $4,500
- Sewer: Clinton Sewer / Wastewater · 21d connect · $5,500
- Electric: Clinton Electric Utility · 14d connect · $1,800
- Gas: Clinton Gas Utility · 21d connect · $1,500
Property values & taxes
Construction timeline
Realistic total: best 7mo · typical 11mo · worst 17mo
Financing
Insurance impact
HOA prevalence & preemption
New Jersey has no HOA-ADU preemption; HOA covenants restricting ADUs are enforceable.
Technical envelope (climate & building code)
Climate & energy code
Building code
Amendments:
- Amendment
- Amendment
Legal history (timeline)
Current ordinance: Town of Clinton Municipal Code Chapter 165 - Land Use Regulations (Article VII Zoning Regulations, accessory-use provisions), adopted 2015-06-15, last amended 2025-11-13
- 1985-07-02 — New Jersey Fair Housing Act (N.J.S.A. 52:27D-301 et seq.) (state-law)
Mount Laurel-implementing statute requiring fair-share housing obligation; Clinton's small-municipality obligation set under Hunterdon County allocations.
Effect: ADU production now counts toward Clinton's Round 4 (2025-2035) fair-share credit; small-municipality formula reduces obligation but does not eliminate it. - 2004-08-10 — Highlands Water Protection and Planning Act (N.J.S.A. 13:20-1 et seq.) (state-law)
Created Highlands Council and the Highlands Preservation/Planning Areas. Town of Clinton sits within the Highlands Planning Area; nearby Spruce Run/Round Valley watersheds are highly protected.
Effect: All new development in Clinton (Town and adjoining Township) must conform to Highlands Regional Master Plan (RMP); Highlands Area Land Use Ordinance overlays Chapter 165 zoning. - 2015-06-15 — Town of Clinton Chapter 165 Zoning - Article VII update (city-ordinance)
Town of Clinton (separate municipality from Clinton Township) updated Article VII Zoning Regulations under Chapter 165; defined accessory uses including in-law suites within principal dwellings.
Effect: Set the present accessory-use envelope governing accessory dwellings on the Town's small lots along Main Street and Lower Center; Highlands Planning Area overlay applies. - 2024-04-04 — NJ A1671 / S705 ADU statewide enabling law (signed 2024) (state-law)
Statewide ADU framework requiring NJDCA model ordinance with 300-1200 sqft / 20-ft height / 5-ft setback / 1-parking-max standards. Town of Clinton must adopt or apply directly by 2025-04 window.
Effect: Town has not yet adopted local ADU ordinance; NJDCA model ordinance applies as default. Highlands RMP septic-density and water-allocation rules continue to control on parcels not on municipal sewer. - 2025-11-13 — Hunterdon County affordable-housing settlement update (city-ordinance)
Hunterdon County municipalities (including Town of Clinton and Clinton Township) negotiated Round 4 fair-share settlement; ADU credit framework integrated.
Effect: Clinton's fair-share obligation includes ADU-production credit; Town drafting Chapter 165 conformance amendment for 2026 adoption to formally codify NJDCA model ordinance terms.
New Jersey state — ADU law and programs
State financing programs
New Jersey Housing and Mortgage Finance Agency (NJHMFA), an in-but-not-of agency under the Department of Community Affairs (DCA), does not operate an ADU-specific homeowner loan or grant product as of 2026-04-26. ADU construction or rehab can be financed through NJHMFA's first-mortgage and down-payment-assistance products when the underlying primary-residence transaction qualifies: the Statewide Down Payment Assistance Program (DPA) provides up to $15,000 in DPA varying by county, with the First Generation DPA Program adding $7,000 in forgivable assistance for qualified first-generation buyers. NJHMFA's 100% Financing Program and Police and Firemen's Retirement System (PFRS) Mortgage Program are similar non-ADU-specific homeowner instruments. The federal Homeowner Assistance Fund administered by NJHMFA (NJERMA portal) provides delinquency-relief funding rather than ADU financing.
State housing programs
New Jersey's principal state-level ADU-touching program is the 2024 Mount Laurel reform (P.L.2024 c.2, the Affordable Housing Reform Act, signed 2024-03-20), which restructures the affordable-housing-obligation calculation and explicitly allows income-restricted ADUs to count toward a municipality's Round 4 Mount Laurel obligations. This is a financial incentive: a municipality that adopts an ADU-permissive ordinance and tracks income-restricted ADUs can offset its obligation calculation, reducing net new affordable-unit production demand. The Department of Community Affairs (DCA) administers the affordable-housing-obligation calculation; the Council on Affordable Housing (COAH, currently dormant) historically held that role. New Jersey does not operate a statewide pre-approved ADU plan catalog, statewide impact-fee waiver statute, or per-ADU rebate. The Aging in Place Council and DCA's Universal Design / accessibility-enhancement programs occasionally touch ADU-style 'in-law suite' projects.
Federal (United States) — ADU-relevant rules and programs
Federal ADU law
The United States has no federal statute that directly regulates accessory dwelling unit entitlement or design. Land-use authority over ADUs resides with states and local governments under the traditional police power. Federal engagement is limited to financing (Fannie/Freddie/FHA/VA/USDA), flood insurance (FEMA/NFIP), and discretionary housing programs (HUD), which are recorded in sibling sections of this file.
Federal financing programs
Federal housing-finance agencies and GSEs set nationwide underwriting rules that govern whether an ADU can be financed, appraised, and counted toward mortgage qualifying income. The relevant actors are Fannie Mae, Freddie Mac, FHA (HUD), VA, and USDA Rural Development.
Federal tax credits
There is no ADU-specific federal tax credit. ADUs may incidentally qualify for existing federal energy-efficiency and clean-energy tax credits when the ADU construction includes qualifying measures.
Federal housing programs
HUD administers several discretionary programs that can fund ADU-related activity at the grantee's election, but none is an ADU-specific program.
ZIP Code
- 08809
Post Office
- 24 E Main St, 08809