Bolthole Index

Morris County, New Jersey

Building permits, zoning and septic rules in Denville Township, New Jersey

Denville Township, New Jersey requires a building permit from the Township Building Inspector before any building is erected, altered or moved1. Denville adopts and administers its own zoning in Chapter 600 Land Use2. Septic plans are reviewed by the health department and the permit is issued by the construction office3. Morris County does not issue building permits4.

At a glance

Building permit
Required; issued by the Township Building Inspector1
Zoning
Township zoning under Chapter 600 Land Use, varies by zone district2
Septic
Plans reviewed by the health department; permit issued by the construction office3
RV living
Parking of travel trailers generally prohibited; one guest trailer allowed up to two weeks a year5
Owner-builder
Owner of an owner-occupied one-family dwelling may sign plans6
R-2 lot size
15,000 sq ft minimum, 100 ft wide, 150 ft deep7

Who to call

Building permits

Township of Denville Construction Department

Building, plumbing, electric and fire permits and inspections; septic permits are issued here after health department plan review

(973) 625-8300

1 Saint Mary's Place, Denville, NJ 07834

Zoning

Township of Denville Zoning Department

Zoning approval for new construction, additions, decks, pools, sheds, fences and accessory buildings

(973) 625-8300

1 Saint Mary's Place, Denville, NJ 07834

Septic permits

Township of Denville Environmental Health Services

Health department that reviews septic system plans

973-625-8300

1 Saint Mary's Place, Denville, NJ 07834

Contact details are copied from each office’s official page and were checked against it on October 13, 2026.

Off-grid gear

Going off-grid in Denville Township means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Denville Township, NJ?

Yes. Denville's land-use code states that no building or part of one may be erected, constructed, altered or moved until the Building Inspector has issued a building permit1. Applications are filed by the owner or an agent and must state the intended use of the structure and land8. New structures need scaled plans and a plot plan from a licensed New Jersey land surveyor8.

Where site or plot-plan approval is required, Planning Board approval comes before the building permit, and permits expire one year after issuance8. Occupying a new or altered building also requires a certificate of occupancy from the Building Inspector9. Statewide, the New Jersey Uniform Construction Code governs the work itself10.

Who issues building permits in Denville, and how do you reach them?

The Township of Denville Construction Department has jurisdiction over building, plumbing, electric and fire changes or improvements3. It is at 1 Saint Mary's Place, Denville, NJ 07834, phone (973) 625-83003. Morris County has no county-level building department; each municipality has its own construction official4.

The owner of an owner-occupied one-family dwelling may sign the required plans instead of a licensed architect or engineer, and if someone else prepares them the owner files an affidavit under state law6.

Does Denville Township have zoning, and what does it mean for RVs and setbacks?

Yes. Denville has adopted and administers Chapter 600 Land Use, and what is allowed depends on the zone district2. The Zoning Department regulates the use of residential and commercial properties and has jurisdiction over the height, size and shape of all buildings, including accessory structures11.

In the R-2 One-Family Residence zone, the schedule lists a minimum lot of 15,000 square feet, 100 feet wide and 150 feet deep7. Required yards are 35 feet front, 17 feet side and 50 feet rear12, and maximum height is 35 feet13. Other zones have different numbers; ask the Zoning Department for your parcel's district.

Parking mobile homes and travel trailers is prohibited in every zone, except one unoccupied travel trailer owned by the property owner or one trailer occupied by nonpaying guests for no more than two weeks in a calendar year, parked within the yard setbacks5. Living in an RV on your lot while you build is therefore not allowed under that provision. We could not confirm a specific rule for tiny homes; ask the Zoning Department.

How do septic permits work in Denville Township?

Septic systems are among the projects the Construction Department lists as needing a permit: plans are reviewed and approved by the health department and the permit is issued by the construction office3. Statewide, the construction official must receive approval of the septic plan from the health department before issuing a construction permit, and a certificate of compliance before a certificate of occupancy14.

Morris County's list of health departments names the Morris County Division of Public Health for Denville15, while the Township also runs its own Environmental Health Services office16. We could not confirm which of the two reviews a given septic plan, so ask the Construction Department before you spend money on a soil test.

Can you build an accessory apartment or outbuilding in Denville?

Affordable accessory apartments are permitted as conditional uses in residential zones on properties with a residential use, provided the unit is affordable to very-low-, low- and moderate-income households17. The unit must be rented to a qualifying household for at least 10 years after initial occupancy17.

Accessory buildings in single- and two-family residential zones are capped by lot size; on lots of 81,000 square feet or more the limit is 2% of the lot, not exceeding 2,000 square feet18.

Building a home in Denville: the steps, in order

  1. Ask the Zoning Department which zone district your lot is in and what it allows11.
  2. If site or plot-plan approval is required, get Planning Board approval first8.
  3. If you need a septic system, have the plan reviewed by the health department3.
  4. File the building permit application with the Building Inspector, with scaled plans and a licensed land-surveyor plot plan8.
  5. Complete the work, which must have utilities such as water, sewer, electric and gas in service before a certificate of occupancy is granted19.
  6. Get the certificate of occupancy from the Building Inspector9.

What stays with Morris County, and what to check before you buy in Denville

The county page covers land outside Denville: see Morris County. Inside Denville, a driveway or utility work in a Morris County right-of-way needs a permit from the County Engineering Division after Planning Board approval20.

Morris County's effective property tax rate is 1.8%21, and the typical home value is about $717,39022. Only about 12% of county soils rate as not limited for a conventional septic field, so expect a site evaluation23. We could not confirm Denville's rules on wells, floodplain development or driveways onto township streets; ask the Construction Department.

Watch-outs

  • Denville's travel-trailer rule allows only one guest trailer for up to two weeks a year, so plan temporary housing during construction elsewhere5.
  • A building permit expires one year after issuance, so schedule inspections to keep it current8.
  • We could not confirm which office reviews septic plans for Denville; call the Construction Department before buying land that needs a septic system3.
  • Zoning numbers differ by district; the figures here are for the R-2 zone only7.

Sources

  1. Article XXVI: General Provisions (Denville Township), quoted and re-checked
  2. Chapter 600: Land Use (Denville Township), quoted and re-checked
  3. Township of Denville Construction Department (denvillenj.gov)
  4. Town of Morristown - Division of Building and Uniform Construction Code (2026 county census)
  5. Article XXVI: General Provisions (Denville Township), quoted and re-checked
  6. Article XXVI: General Provisions (Denville Township), quoted and re-checked
  7. Denville Township Schedule of Area, Yard and Bulk Requirements (Denville Township), quoted and re-checked
  8. ecode360.com (Denville Township), quoted and re-checked
  9. ecode360.com (Denville Township), quoted and re-checked
  10. Construction Code FAQs for New Home Buyers, quoted and re-checked
  11. Township of Denville Zoning Department (denvillenj.gov)
  12. Denville Township Schedule of Area, Yard and Bulk Requirements (Denville Township), quoted and re-checked
  13. Denville Township Schedule of Area, Yard and Bulk Requirements (Denville Township), quoted and re-checked
  14. DCA Bulletin 79-7: Septic Systems, quoted and re-checked
  15. Health Departments – Morris County, NJ, quoted and re-checked
  16. Township of Denville Environmental Health Services (denvillenj.gov)
  17. Article LVI: Accessory Apartments (Denville Township), quoted and re-checked
  18. ecode360.com (Denville Township), quoted and re-checked
  19. N.J.A.C. 5:23-2.23 Certificate requirements, quoted and re-checked
  20. Morris County Land Development Standards, quoted and re-checked
  21. Effective property tax rate: Bolthole Index county data
  22. Typical home value (Zillow): Bolthole Index county data
  23. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data

Written October 13, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Answers from the rulebook for Denville Township

Denville Township’s own rules

  • Building permitRequired

    Buildings or parts of buildings erected, constructed, altered, or moved inside Denville township.

    • Applications must state intended use; new-structure plans require scaled plans and a licensed New Jersey land surveyor plot plan.
    • Required plans must generally be signed by a licensed architect or engineer, but the owner of an owner-occupied one-family dwelling may sign.
    • Planning Board site or plot plan approval must precede a building permit when required.
    • Permits expire one year after issuance and may be revoked for nonconforming construction.
    “No building or part thereof shall be erected, constructed, altered or moved until a building permit has been issued by the Building Inspector.”
  • Owner-builder exemptionConditional

    Plans, specifications, and plot plans for an owner-occupied one-family dwelling in Denville township.

    • The owner may sign only for a one-family dwelling occupied by the owner.
    • If prepared by the owner or another person rather than the specified licensed professional, the owner must file an affidavit in accordance with state law.
    “All plans, specifications and plot plans required by this section and by any officer or body of the Township charged with the enforcement and administration of this article shall be signed by a duly licensed architect of the State of New Jersey or by a licensed professional engineer where permitted by law, or by the owner of a one-family dwelling only if occupied by the owner.”
  • Certificate of occupancyRequired

    Occupation or use of land and buildings inside Denville township, including buildings erected or altered and changes of use.

    • The certificate must state compliance with applicable Township and state requirements.
    • Certificates are to be granted or denied within one week after application is received.
    • A change in use requires a new certificate unless waived by the Planning Board.
    • A performance guarantee may support issuance when adverse weather delays certain site improvements.
    • Original certificate fee is 5% of the building permit fee or $5, whichever is larger; copies cost $1.

    original certificate fee: 5% of building permit fee or $5, whichever is larger USD · certificate copy fee: 1 USD

    “No land shall be occupied or used and no building hereafter erected or altered shall be occupied or used in whole or in part for any purpose whatsoever until a certificate of occupancy shall have been issued by the Building Inspector.”
  • Local zoningPresent (with conditions)

    Land inside Denville township; the Township has adopted and administers Chapter 600 Land Use, including zoning regulations.

    • Zoning and land-use requirements vary by zone district and applicable overlay or redevelopment provisions.
    “No land may be used and no structure may be erected, raised, moved, extended, enlarged, altered, demolished, or used, for any purpose other than that permitted herein for the zone in which it is located, and all construction shall be in conformity with the regulations provided for the zone in which such construction is located.”
  • Minimum lot sizeSpecified

    One-family residences in the R-2 Zone, Denville township.

    • The schedule identifies the primary use as One-Family Residence.

    minimum lot area: >= 15000 square feet · minimum lot width: >= 100 feet · minimum lot depth: >= 150 feet

    “R-2 One-Family Residence 15,000 100 150 35 17 50 35 2 No”
  • SetbacksSpecified

    One-family residences in the R-2 Zone, Denville township.

    • The schedule identifies the primary use as One-Family Residence.

    front yard: >= 35 feet · side yard: >= 17 feet · rear yard: >= 50 feet

    “R-2 One-Family Residence 15,000 100 150 35 17 50 35 2 No”
  • Lot coverageSpecified

    Accessory buildings and utility structures in all single- and two-family residential zones inside Denville township.

    • For lots under 7,500 square feet: up to 6%, not exceeding 450 square feet.
    • For lots from 7,500 to 40,249 square feet: up to 6%, not exceeding 1,000 square feet.
    • For lots from 40,250 to 80,999 square feet: up to 3%, not exceeding 1,600 square feet.
    • For lots of 81,000 square feet or more: up to 2%, not exceeding 2,000 square feet.
    • Barn structures on farm-assessed lots are excluded from maximum size limitations.
    “Within all single- and two-family residential zones, accessory building(s) and utility structure(s) shall meet the following coverage limitations:”
  • Building heightSpecified

    One-family residences in the R-2 Zone, Denville township.

    • The schedule identifies the primary use as One-Family Residence.

    maximum height: <= 35 feet

    “R-2 One-Family Residence 15,000 100 150 35 17 50 35 2 No”
  • Living in an RVLimited

    Parking or occupancy of mobile homes and travel trailers on land inside Denville township.

    • Parking of mobile homes and travel trailers is generally prohibited.
    • An exception exists for one unoccupied travel trailer owned by the property owner or one travel trailer occupied by nonpaying guests of the property owner for no longer than two weeks in any calendar year.
    • The trailer must be parked within the applicable zone yard setbacks.

    maximum guest occupancy period: <= 2 weeks per calendar year (one travel trailer occupied by nonpaying guests)

    “Notwithstanding any other provisions of this article, the parking of mobile homes and travel trailers in any zone is prohibited, except that the prohibition should not extend to one unoccupied travel trailer owned by the property owner or one travel trailer occupied by nonpaying guests of the property owner for a period not longer than two weeks in any calendar year, if parked within the yard setback requirements of the zone in which it is parked.”
  • Camping on your landLimited

    Temporary travel-trailer occupancy on land inside Denville township.

    • The provision addresses travel-trailer parking rather than camping generally.
    • Only one qualifying travel trailer is excepted.
    • Guest occupancy may not exceed two weeks in a calendar year and setback requirements apply.

    maximum period: <= 2 weeks per calendar year (nonpaying guests in one travel trailer)

    “Notwithstanding any other provisions of this article, the parking of mobile homes and travel trailers in any zone is prohibited, except that the prohibition should not extend to one unoccupied travel trailer owned by the property owner or one travel trailer occupied by nonpaying guests of the property owner for a period not longer than two weeks in any calendar year, if parked within the yard setback requirements of the zone in which it is parked.”
  • Accessory dwellingsAllowed (with conditions)

    Affordable accessory apartments on residential-use properties in all Denville residential zones.

    • Units must be affordable to very-low-, low-, or moderate-income households.
    • The unit must be rented to a qualifying household at initial occupancy and for at least 10 years.
    • Rents must be affordable under applicable FHA, COAH, and UHAC regulations.
    • A deed or declaration of covenants and restrictions must be approved by the Township Attorney and recorded before the building permit or certificate of occupancy, as applicable.
    • The appropriate utility authority must certify sufficient water and sewer capacity; well or septic locations must meet applicable NJDEP standards.
    • The program does not restrict the number of bedrooms.

    minimum affordability period: >= 10 years (after initial occupancy)

    “Provided the units are affordable to very-low-, low- and moderate-income households, accessory apartments shall be permitted as conditional uses in all residential zones provided the accessory apartment is located on a property with a residential use.”
  • Permit processPublished (with conditions)

    Building-permit process inside Denville township.

    • Applications are filed by the owner or agent and must state intended use.
    • New-structure applications require scaled plans and a licensed New Jersey land-surveyor plot plan.
    • Plans must conform to Chapter 600, other applicable Township ordinances, and state regulations.
    • Planning Board approval is required first where site or plot-plan approval is required.
    • Permits expire one year after issuance.
    “All applications for a building permit shall be filed by the owner or his agent and shall state the intended use of the structure and the land.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Denville Township or Morris County directly.

  • Inspections — Building inspection requirements for construction inside Denville township.
  • Minimum dwelling size — Minimum dwelling size inside Denville township.
  • Tiny homes — Tiny-home occupancy inside Denville township.
  • Who permits septic — Individual sewage disposal systems inside Denville township.
  • Septic permit — Locating, designing, constructing, installing, altering, repairing, or operating individual sewage disposal systems inside Denville township.
8 more unanswered
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Driveway access
  • Building in a floodplain
  • Short-term rentals

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Unanswered questions are usually a sign that Denville Township publishes no rule on the point, not that none exists. Morris County’s page lists the county offices to call.

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