Bolthole Index

Morris County, New Jersey

Building permits, zoning and septic rules in Mendham Borough, New Jersey

Building in the Borough of Mendham, New Jersey (Morris County) requires a building permit filed with the borough's Construction Official1. Mendham adopted its own zoning ordinance2, so the borough, not Morris County, decides use and lot rules. Septic permits fall under the Mendham Borough Board of Health, which contracts its septic inspections to the Bernards Township Health Department3.

At a glance

Building permit
Required; apply to the Construction Official before work begins1
Who issues it
Mendham Borough Construction Department4
Zoning
Borough zoning ordinance, with 5-acre down to 1/4-acre residence districts25
Septic
Borough Board of Health, with inspections contracted to Bernards Township Health Department3
Subdivision
Regulated by borough chapter on subdivision and site plan review6
Flood hazard areas
Development permit required7
RV or tiny-home living
Not confirmed; ask the Zoning Office8

Who to call

Building permits

Mendham Borough Construction Permits & Inspections

Building permit applications, plan review and inspections under the Uniform Construction Code inside Mendham Borough

973-543-7152

6 West Main Street, 2nd Floor, Mendham, NJ 07945

Zoning

Mendham Borough Zoning Office

Zoning compliance review and zoning permits for work on property inside Mendham Borough

973-543-7152 ext. 26

zoning@mendhamnj.org

Bowers Building, 6 West Main Street, Mendham, NJ 07945

Septic permits

Mendham Borough Board of Health (septic inspections through Bernards Township Health Department)

Septic and new well inspection services for Mendham Borough, contracted by the Board of Health to the Bernards Township Health Department

908-204-3070

health@bernards.org

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 Borough of Mendham means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Mendham Borough, NJ?

Yes. Anyone placing, erecting, constructing, altering or adding to a building or structure inside the Borough of Mendham must file an application for a building permit with the Construction Official before work begins1. The application is filed in quintuplicate9. The borough generally acts on it within 20 business days, and structures the Uniform Construction Code does not regulate, or questions about zoning compliance, go to the Zoning Officer1.

New Jersey's statewide Uniform Construction Code applies in Mendham, and a permit must be obtained before covered work begins10. Permit fees are the subcode fees in the borough's fee chapter and must be paid before the permit is issued11.

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

The Mendham Borough Construction Department is the borough's own State Uniform Construction Code enforcing agency, made up of a Construction Official and building, plumbing, electrical and fire protection subcode officials4. Contact the Construction Permits & Inspections office at the borough's Bowers Building12.

Morris County does not issue building permits for land inside Mendham; the county's building-code answer is the same statewide code, enforced by municipal construction officials13.

Does Mendham Borough have zoning, and what does it mean for RVs, tiny homes and lot size?

Mendham Borough has its own zoning ordinance, adopted by the Mayor and Council2. The borough divides land into districts, including 5-Acre Residence, 3-Acre Residence, 1-Acre Residence, 1/2-Acre Residence and 1/4-Acre Residence, plus business, historic and affordable-housing overlay districts5. The zoning map is on file in the Borough Clerk's office5. Lot size, setbacks and coverage depend on the district your parcel sits in, so check the map before you plan.

We could not confirm Mendham's rules on RV occupancy, temporary camping, tiny homes, manufactured homes or accessory dwellings. Ask the Zoning Office before you buy or plan any of these8. The Zoning Office states that zoning compliance review is generally required for work in and around your property8.

How do septic permits work in Mendham Borough?

Septic is not handled by the construction office. In New Jersey, local health departments oversee single-family septic systems with design flows below 2,000 gallons per day14. In Mendham Borough the Board of Health contracts septic and new well inspection services to the Bernards Township Health Department3.

The Morris County Division of Public Health serves Mendham Township, not the borough, so do not send a Mendham Borough address there15. Before a construction permit issues for a building on a septic system, the construction official must receive the health department's approval of the system plan, and a Certificate of Compliance is needed before a certificate of occupancy16. We could not confirm the borough's current septic permit steps or well permit rules; ask the Board of Health3.

Building a home in Mendham Borough: the steps, in order

  1. Confirm your district and what the zoning allows with the Zoning Office, and get zoning compliance review8.
  2. If you are dividing land, expect subdivision and site-plan review under the borough's subdivision chapter6.
  3. Get septic plan approval from the health department having jurisdiction, which the construction official requires before a permit issues16.
  4. File the building permit application with the Construction Official1.
  5. Schedule the required inspections as work proceeds17.
  6. Obtain a certificate of occupancy after final inspection; all required utilities, including water, sewer, electric and gas, must be in service first18.

What stays with Morris County and the state, and what to check before you buy

Subdivision applications in Morris County go to the County Planning Board as well as the borough, though minor subdivisions that do not front on county roads are exempt from formal county review19. A driveway onto a Morris County road needs a county right-of-way permit applied for 10 days before construction20. A driveway onto a state highway needs a state access permit21.

In areas of special flood hazard inside Mendham, a development permit is required under the borough's flood damage prevention chapter7. Where borough sewer service is available, the code requires connection22. For land outside the borough, see the Morris County page.

Watch-outs

  • The Morris County septic office handles Mendham Township, not Mendham Borough; a search for "Mendham" can send you to the wrong health department15.
  • We could not confirm Mendham's owner-builder, RV, tiny-home, driveway and well rules; call the Construction Office, Zoning Office or Board of Health before relying on a neighbor's experience12.
  • The mendhamboro.org site belongs to the Mendham Borough school district; the borough government is at mendhamnj.org12.

Sources

  1. Article XIII Enforcement - Borough of Mendham, NJ (Borough of Mendham), quoted and re-checked
  2. Chapter 215: Zoning - Borough of Mendham, NJ (Borough of Mendham), quoted and re-checked
  3. Mendham Borough Board of Health (septic inspections through Bernards Township Health Department) (mendhamnj.org)
  4. Chapter 90: Construction Codes, Uniform - Borough of Mendham, NJ (Borough of Mendham), quoted and re-checked
  5. Article II: Zoning Districts - Borough of Mendham, NJ (Borough of Mendham), quoted and re-checked
  6. Chapter 195: Subdivision of Land and Site Plan Review - Borough of Mendham, NJ (Borough of Mendham), quoted and re-checked
  7. Chapter 110: Flood Damage Prevention - Borough of Mendham, NJ (Borough of Mendham), quoted and re-checked
  8. Mendham Borough Zoning Office (mendhamnj.org)
  9. Article XIII Enforcement - Borough of Mendham, NJ (Borough of Mendham), quoted and re-checked
  10. N.J.A.C. 5:23-2.14, Construction permits—when required (New Jersey statewide rule), quoted and re-checked
  11. Chapter 90: Construction Codes, Uniform - Borough of Mendham, NJ (Borough of Mendham), quoted and re-checked
  12. Mendham Borough Construction Permits & Inspections (mendhamnj.org)
  13. Bureau of Construction Project Review, quoted and re-checked
  14. NJDEP Permitting Information, quoted and re-checked
  15. Health Departments – Morris County, NJ, quoted and re-checked
  16. DCA Bulletin 79-7: Septic Systems, quoted and re-checked
  17. New Jersey Department of Community Affairs, New Home Warranty—Consumer Information (New Jersey statewide rule), quoted and re-checked
  18. N.J.A.C. 5:23-2.23 Certificate requirements, quoted and re-checked
  19. Land Development Review, quoted and re-checked
  20. Morris County Land Development Standards, quoted and re-checked
  21. Major Access Permits (New Jersey statewide rule), quoted and re-checked
  22. Chapter 168: Sewerage System - Borough of Mendham, NJ (Borough of Mendham), quoted and re-checked

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 Borough of Mendham

Borough of Mendham’s own rules

  • Building permitRequired

    Placing, erecting, constructing, altering, or adding to a building, structure, or sign in Mendham borough.

    • Application is filed with the Construction Official before work begins.
    • Application must be in quintuplicate and provide information needed to determine zoning conformity.
    • Permit or refusal is generally due within 20 business days; structures not regulated by the Uniform Construction Code or compliance questions are referred to the Zoning Officer, who issues a permit or refusal within 10 days.
    “shall file with the Construction Official an application for a building permit.”
  • Building code adoptedAdopted (with conditions)

    Construction-code enforcement inside Mendham borough.

    • Elevator subcode enforcement and inspections are relinquished to the New Jersey Department of Community Affairs pursuant to N.J.A.C. 5:23-4.3.
    • Officials must be qualified under P.L. 1975, c. 217 and N.J.A.C. 5:23; an on-site inspection agency may be retained by contract.
    “There is hereby established in the Borough of Mendham a State Uniform Construction Code enforcing agency to be known as the "Mendham Borough Construction Department," consisting of a Construction Official, Building Subcode Official, Plumbing Subcode Official, Electrical Subcode Official, Fire Protection Subcode Official and such other subcode officials for such additional subcodes as the Commissioner of the Department of Community Affairs, State of New Jersey, shall hereafter adopt as part of the State Uniform Construction Code.”
  • Local zoningPresent

    Land inside Mendham borough.

    “Adopted by the Mayor and Council of the Borough of Mendham 12-18-1978 by Ord. No. 18-78”
  • Zoning districtsPublished

    Zoning districts inside Mendham borough.

    • The zoning map is on file in the Borough Clerk's office and available for public inspection during office hours.
    • Listed districts include 5-Acre Residence, 3-Acre Residence, 1-Acre Residence, 1/2-Acre Residence, 1/4-Acre Residence, East Business, Historic Business, Limited Business, Historic District Overlay, Affordable Housing Overlay, and East Business Affordable Housing.
    “the Borough of Mendham is hereby divided into several classes of districts or zones”
  • Mandatory utility hookupSewer (with conditions)

    Homes and properties inside Mendham borough where Borough sewer service is available.

    • The code separately lists connection requirements when sewer service becomes available and requires a building sewer or lateral permit.
    “§ 168-4 Connection required as sewer service becomes available.”
  • Subdividing landRegulated (with conditions)

    Subdivision of land and site-plan review inside Mendham borough.

    • The chapter contains separate procedures for minor subdivisions, preliminary approval of major subdivisions, final approval of major subdivisions, and site-plan approval.
    “Chapter 195 Subdivision of Land and Site Plan Review”
  • Building in a floodplainRequired

    Development in areas of special flood hazard inside Mendham borough.

    • A development permit application is required under Chapter 110.
    • The chapter includes local administration, variance procedures, and flood-hazard-reduction standards.
    “Development permit required; application.”
  • Permit feesPublished (with conditions)

    Uniform Construction Code permits issued inside Mendham borough.

    • Permit fees are the subcode fees listed in Chapter 102 and must be paid before the permit is issued.
    • A surcharge fee is collected under N.J.A.C. 5:23-4.19(b).
    “The fee for a permit shall be the subcode fees listed in Chapter 102, Fees”
  • Permit processPublished (with conditions)

    Building permit applications inside Mendham borough.

    • File with the Construction Official before commencing work.
    • Application is in quintuplicate.
    • Permit or refusal is due within 20 business days; UCC-unregulated structures or zoning questions are referred to the Zoning Officer, who acts within 10 days.
    “The application shall be in quintuplicate”

Still unanswered

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

  • Owner-builder exemption — Owner-builders in Mendham borough.
  • Inspections — Building inspections inside Mendham borough.
  • Certificate of occupancy — Certificates of occupancy inside Mendham borough.
  • Minimum dwelling size — Residential dwellings inside Mendham borough.
  • Living in an RV — RV occupancy on private land inside Mendham borough.
11 more unanswered
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Driveway access
  • 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 Borough of Mendham publishes no rule on the point, not that none exists. Morris County’s page lists the county offices to call.

← All of Morris County: county rules, score and offices