Bolthole Index

Hunterdon County, New Jersey

Zoning, building permits and septic rules in Califon, New Jersey

The Borough of Califon, in Hunterdon County, New Jersey, has its own zoning, handled by the Borough Planning Board1. Building permits inside Califon are enforced by the Township of Tewksbury Construction Department under the state Uniform Construction Code2. Septic permits in Hunterdon County come from the county Office of Environmental Health3; we could not confirm who covers septic inside Califon itself.

At a glance

Zoning
Yes, borough zoning; the Planning Board hears applications and variances1
Building permit
Required for most construction work; ordinary maintenance needs none4
Who issues building permits
Township of Tewksbury Construction Department, the enforcing agency for Califon2
Septic
County Environmental Health reviews septic plans in Hunterdon County; Califon-specific authority unconfirmed3
RV living
In flood hazard areas, only fully licensed, highway-ready RVs placed for fewer than 180 consecutive days; elsewhere unconfirmed5
Owner-builder
State registration exception for building your own home; permits, inspections and an owner affidavit still apply67
Property tax (county)
Hunterdon County's effective rate is about 2%8

Who to call

Zoning

Califon Borough Hall and Planning Board Secretary

Zoning applications, variances and subdivision applications in Califon; start with the Planning Board Secretary

908-832-7850

39 Academy St. Califon, NJ 07830

Septic permits

Hunterdon County Health Department, Office of Environmental Health

Septic design review, installation inspections and certification of completed systems in Hunterdon County

908-788-1351

314 State Route 12, Building # Flemington, NJ 08822

Contact details are copied from each office’s official page and were checked against it on October 24, 2026.

Off-grid gear

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

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

Yes. The Borough of Califon has its own zoning, and the Borough Planning Board considers applications that conform to it as well as non-conforming proposals that may need a variance1. Hunterdon County does not zone: New Jersey counties have no zoning grant under the Municipal Land Use Law9.

We could not read the borough's district schedule, so we cannot give minimum lot sizes, setbacks, minimum home size, accessory-dwelling rules or tiny-home rules for Califon. State law lets each municipality set those by district1011. Ask the Planning Board Secretary at Borough Hall which district your parcel is in and check it against the zoning map on the borough site.

Subdivisions are regulated in Califon, and a proposal starts with an application to the Planning Board Secretary12.

Do you need a building permit in Califon, and who issues it?

Most construction work in Califon needs a permit. New Jersey's Uniform Construction Code separates full permits, "minor work" permits and ordinary maintenance, which needs no permit4. The enforcing agency for Califon is the Township of Tewksbury Construction Department, not a Califon office2.

Califon's construction fees follow the Tewksbury fee schedule, plus a State-required surcharge13. Applications go on the State's construction permit forms to the local enforcement office, and the type of project decides which subcode sections apply14. Inspections happen at stages during construction15, and a certificate of occupancy follows only after final inspections pass16.

Zoning approval and septic certification come first in practice: no building permit can issue until required State, county and local approvals are in place17.

How do septic permits work in Califon?

In New Jersey, a building permit cannot issue until the board of health having jurisdiction certifies the septic and water plans18. In Hunterdon County, the Office of Environmental Health reviews septic designs, inspects installations and certifies completed systems3, and offers the application to construct, alter or repair a system19.

We could not confirm whether the county office or Califon's own board of health handles septic permits and perc tests for addresses inside the borough, and the borough's site points perc-test questions to the municipal offices. Call Borough Hall and the county Office of Environmental Health before you pay for a design. Septic tanks must be inspected before they are covered20.

County-wide soil ratings suggest planning for a site evaluation: USDA rates only about 9.8% of Hunterdon County soils as not limited for a conventional drain field21.

Can you live in an RV or tiny home on your land in Califon?

We could not confirm a general RV-living, camping or tiny-home rule for Califon, so ask the Planning Board Secretary before parking anything you plan to sleep in.

The one rule we confirmed is in the borough's flood ordinance. RVs are not allowed in coastal high hazard areas or floodways, and elsewhere in flood hazard areas they must be fully licensed, ready for highway use and on site fewer than 180 consecutive days5. Manufactured homes in flood hazard areas must be elevated and anchored22. Statewide, HUD manufactured homes are limited to single-family use group R-523.

Building a home in Califon: the steps, in order

  1. Call the Planning Board Secretary at Borough Hall to confirm your zoning district and whether any variance or subdivision approval is needed112.
  2. Check the flood hazard area; development there needs a permit from the borough's Floodplain Administrator, possibly in addition to a building permit24.
  3. Get septic and well plans approved through the health authority; Hunterdon County Environmental Health is the starting call19.
  4. File the State construction permit forms with the Tewksbury Construction Department14.
  5. Pass the staged inspections15.
  6. For an owner-built home, file the owner affidavit with the construction official before a certificate of occupancy can issue7.
  7. Obtain the certificate of occupancy16.

What stays with Hunterdon County, and what to check before you buy in Califon

The county handles septic review and subdivision review that precedes municipal approval325. For land outside the borough, see the Hunterdon County page.

County-level numbers: the typical home value is about $644,39626, the effective property tax rate is about 2%8, and the median property tax bill is about $10,001 a year27. A driveway onto a State highway needs a State access permit28.

Watch-outs

  • Califon's zoning district schedule (lot sizes, setbacks, accessory dwellings, tiny homes) was not available to us; confirm with the Planning Board Secretary before buying1.
  • Who administers septic inside Califon, borough board of health or county, is unconfirmed; call Borough Hall and Hunterdon County Environmental Health3.
  • Building the home yourself does not waive permits: the owner-builder exception covers builder registration only6.
  • Flood hazard areas add a Floodplain Administrator permit and RV limits24.

Sources

  1. Califon Borough Planning Board (Borough of Califon), quoted and re-checked
  2. New Jersey Department of Community Affairs: New Home Warranty for Consumers (Borough of Califon), quoted and re-checked
  3. Septic Disposal Systems, quoted and re-checked
  4. New Jersey Department of Community Affairs: Construction Permit Application Packet & Related Forms (Borough of Califon), quoted and re-checked
  5. Borough of Califon Flood Damage Prevention Ordinance 2023-02 (Borough of Califon), quoted and re-checked
  6. New Jersey Department of Community Affairs — Construction Code FAQs for New Home Buyers, quoted and re-checked
  7. N.J.A.C. 5:23, Uniform Construction Code (New Jersey statewide rule), quoted and re-checked
  8. Effective property tax rate: Bolthole Index county data
  9. P.L. 2013, c.106 — Municipal Land Use Law amendments (New Jersey statewide rule), quoted and re-checked
  10. P.L. 2013, c.106 (Municipal Land Use Law amendments) (New Jersey statewide rule), quoted and re-checked
  11. P.L. 2013, c.106 (Municipal Land Use Law amendments) (New Jersey statewide rule), quoted and re-checked
  12. Califon Borough Planning Board (Borough of Califon), quoted and re-checked
  13. Township of Lebanon, Chapter 178: Construction Codes, Uniform (Borough of Califon), quoted and re-checked
  14. New Jersey Department of Community Affairs: Construction Permit Application Packet & Related Forms (Borough of Califon), quoted and re-checked
  15. nj.gov (Borough of Califon), quoted and re-checked
  16. nj.gov (Borough of Califon), quoted and re-checked
  17. New Jersey Uniform Construction Code, N.J.A.C. 5:23 (New Jersey statewide rule), quoted and re-checked
  18. New Jersey Statutes, R.S. 58:11-23 through 58:11-43 (New Jersey statewide rule), quoted and re-checked
  19. Septic Disposal Systems, quoted and re-checked
  20. New Jersey Statutes, R.S. 58:11-23 through 58:11-43 (New Jersey statewide rule), quoted and re-checked
  21. 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
  22. Borough of Califon Flood Damage Prevention Ordinance 2023-02 (Borough of Califon), quoted and re-checked
  23. Manufactured/Modular Buildings Program (New Jersey statewide rule), quoted and re-checked
  24. Borough of Califon Flood Damage Prevention Ordinance 2023-02 (Borough of Califon), quoted and re-checked
  25. County Land Development Standards, quoted and re-checked
  26. Typical home value (Zillow): Bolthole Index county data
  27. Median property tax bill: Bolthole Index county data
  28. Major Access Permits (New Jersey statewide rule), quoted and re-checked

Written October 24, 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 Califon

Borough of Califon’s own rules

  • Local zoningPresent (with conditions)

    Land within Califon borough.

    • Conforming and non-conforming land-use proposals are considered by the Borough Planning Board; non-conforming proposals may require a variance.
    “Applications which conform to the Borough’s zoning are considered by the Planning Board. Non-conforming land use proposals are considered by the Planning Board.”
  • Living in an RVLimited

    Recreational vehicles in flood hazard areas inside Califon borough.

    • Placement is prohibited in coastal high hazard areas and floodways.
    • In other flood hazard areas, vehicles must be fully licensed, ready for highway use, and placed for fewer than 180 consecutive days; longer or non-highway-ready placement must meet habitable-building requirements.

    temporary placement: < 180 consecutive days (Vehicle must be fully licensed and ready for highway use.)

    “The placement of recreational vehicles shall not be authorized in coastal high hazard areas and in floodways. Recreational vehicles in flood hazard areas shall be fully licensed and ready for highway use and shall be placed on a site for less than 180 consecutive days.”
  • Manufactured homesLimited

    Manufactured homes installed, relocated, replaced, or substantially improved in flood hazard areas inside Califon borough.

    • The floodplain ordinance requires elevation, compliant foundations, and anchoring.
    • This claim does not establish the zoning status of manufactured homes outside flood hazard areas.
    “All new, relocated, and replacement manufactured homes to be placed or substantially improved in a flood hazard area shall be elevated such that the bottom of the frame is elevated to or above the elevation specified in Section 801.2.”
  • Subdividing landRegulated (with conditions)

    Subdivision proposals inside Califon borough.

    • A proposal begins with an application to the Planning Board Secretary; the Planning Board hears applications and makes subdivision decisions.
    “Adopt a Master Plan, hear applications and make decisions on Subdivisions, Site Plans and Conditional Uses”
  • Building in a floodplainRequired

    Any development in a flood hazard area inside Califon borough.

    • The applicant must apply to the Floodplain Administrator and obtain the required permit before development.
    • The administrator may require floodplain approval in addition to a building permit depending on the nature and extent of development.
    “Any person, owner or authorized agent who intends to conduct any development in a flood hazard area shall first make application to the Floodplain Administrator and shall obtain the required permit. Depending on the nature and extent of proposed development that includes a building or structure, the Floodplain Administrator may determine that a floodplain development permit or approval is required in addition to a building permit.”

Rules another office applies inside Borough of Califon

Borough of Califon does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

  • Building permitLimited

    Construction work inside Califon borough.

    • The State page distinguishes full permits and minor-work permits from ordinary maintenance, for which it identifies no permit; permit requirements therefore depend on the work category.
    • The Township of Tewksbury Construction Department is the enforcing agency for Califon.
    “Permit Required, N.J.A.C. 5:23-2.14 (full permit) * Minor Work, N.J.A.C. 5:23-2.17A (permit "lite") * Ordinary Maintenance, N.J.A.C. 5:23-2.7 (no permit)”
  • Building code adoptedAdopted (with conditions)

    Construction inside Califon borough, which is subject to New Jersey's Uniform Construction Code enforcement.

    • Califon's enforcing agency is the Township of Tewksbury Construction Department under the cited shared-service ordinance.
    “All construction work performed in the State is regulated by the Uniform Construction Code (UCC), which contains rules relating to the administration and enforcement of the code as well as four basic technical subcodes: building, electrical, fire protection, and plumbing.”
  • InspectionsRequired

    Permitted construction inside Califon borough.

    • The local enforcing agency for Califon is the Township of Tewksbury Construction Department.
    “Rather, the UCC requires that inspectors carry out periodic inspections during the progress of work to ensure that the work inspected conforms to the UCC.”
  • Certificate of occupancyRequired

    Completed construction projects inside Califon borough that require a certificate of occupancy under the UCC.

    • The project must pass final inspections before the construction official issues the certificate.
    “Once a construction project passes final inspections, the builder certifies that the project complies with the UCC and the construction official issues a Certificate of Occupancy.”
  • Permit feesVariable (with conditions)

    Uniform Construction Code permits for work inside Califon borough.

    • The construction-permit fee is the sum of current Tewksbury subcode fees and may be amended or revised.
    • An additional State-required surcharge is collected from Califon applicants.
    “The fee for a construction permit shall be a sum equal to the sum of the subcode fees listed in the current fee schedule of the Township of Tewksbury ordinance establishing a state uniform construction enforcing agency and construction fee schedule pursuant to the State Uniform Construction Code Act and Title 5, Chapter 23 of the New Jersey Administrative Code, and as such ordinance may be amended and revised from time to time.”
  • Permit processPublished (with conditions)

    Construction-permit applications inside Califon borough.

    • Submit the applicable State construction-permit forms to the local construction-code enforcement office; the project type dictates applicable technical sections.
    • For Califon, the shared enforcing agency is the Township of Tewksbury Construction Department.
    “Please note that the nature of the construction project you are undertaking will dictate which of the subcode technical sections apply. Also, when submitting these forms to your Local Construction Code Enforcement Office, please provide one original plus three photocopies of each completed applicable form.”

Still unanswered

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

  • Owner-builder exemption — Owner-builders inside Califon borough.
  • Zoning districts — Zoning districts inside Califon borough.
  • Minimum dwelling size — Residential districts inside Califon borough.
  • Minimum lot size — Residential districts inside Califon borough.
  • Setbacks — Residential districts inside Califon borough.
14 more unanswered
  • Lot coverage
  • Building height
  • Camping on your land
  • Tiny homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • 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 Califon publishes no rule on the point, not that none exists. Hunterdon County’s page lists the county offices to call.

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