Bolthole Index

Nantucket County, Massachusetts

Building permits, zoning and land rules in Nantucket County, Massachusetts

57Index Score / 100
#5 of 14 in Massachusetts

Nantucket County, Massachusetts requires a building permit to erect, construct, alter or move a structure.1 The consolidated Town and County also has zoning, and the rules for a particular property depend on its zoning district and any overlay.2 Start with Planning & Land Use Services for building and zoning, then involve Health & Human Services if the project uses or changes an on-site septic system.34

At a glance

Building permit
Required to erect, construct, alter or move a structure1
Zoning
Countywide through the consolidated Town and County; district and overlay rules vary2
Septic
Health & Human Services issues permits; Board of Health or MassDEP approval may apply54
RV living
Not confirmed; ask Planning & Land Use Services before relying on RV occupancy6
Tiny home
Local permission is not confirmed; seasonal-community tiny-house rules require local bylaws76
Owner-builder
An owner-occupant appears exempt from supervisor licensing, but a permit remains required81
Minimum home size
Local zoning cannot regulate a single-family home's interior area; building-code rules still apply9

Who to call

Building permits

Planning & Land Use Services (PLUS)

Building permits and permit-related matters through the Building division

508-325-7587

[email protected]

2 Fairgrounds Road, Nantucket, MA 02554

Online permits →

Zoning

Planning & Land Use Services (PLUS)

Planning, zoning and land-use questions

508-325-7587

[email protected]

2 Fairgrounds Road, Nantucket, MA 02554

Online permits →

Septic permits

Health & Human Services Department

Permits related to septic systems and public-health inspections

508-228-7200 Ext. 7009

131 Pleasant Street, Nantucket, MA 02554

Online permits →

Also useful

Citizen Self Service Portal

Online permit and plan applications and application-status tracking

508-228-7200

16 Broad Street, Nantucket, MA 02554

Online permits →

Contact details are copied from each office’s official page and were checked against it on September 28, 2026.

Do you need a building permit in Nantucket County, Massachusetts?

Yes. Nantucket County requires a building permit to erect, construct, alter or move a structure, and the Building Department enforces the Massachusetts State Building Code.1 The local zoning framework applies across the consolidated Town and County, so building-code approval does not replace zoning review.2

An owner-occupant of a one- or two-family dwelling appears eligible to perform work without a construction supervisor license, but the building permit is still required.8 Ask the Building division which affidavit, trade licenses and inspections apply before planning self-performed work.3

Who issues building permits in Nantucket County?

Nantucket's Planning & Land Use Services department includes the Building, Planning and Zoning departments and the Historic District Commission, creating one point of contact for permit-related matters.3 The office is at 2 Fairgrounds Road, Nantucket, MA 02554, and its main number is 508-325-7587.3

The Town's Citizen Self Service portal accepts permit and plan applications for the Health Department, Sewer Department, and electrical, gas/plumbing and zoning work handled through PLUS.10 Use the portal to begin an application and view its status, but call PLUS with building- or zoning-code questions.10 Planning application fees vary by application type, so confirm the applicable fee with the office before submitting.11

Does Nantucket County have zoning?

Yes. The consolidated Town and County of Nantucket regulates land through its zoning chapter, and parcel permissions and dimensional controls depend on the zoning district and any overlay.2 Official GIS materials show commercial and residential zones along with multiple overlay districts, so identify the parcel on the zoning map before designing a house or accessory structure.12

The available material does not establish one countywide minimum lot size, setback, lot-coverage limit or building-height limit. Ask Planning & Land Use Services to identify every base district and overlay affecting the parcel before relying on a listing or survey.6 Massachusetts zoning bylaws may not regulate the interior area of a single-family residential building, although state building-code requirements remain in force.9

How do septic permits work in Nantucket County?

Nantucket Health & Human Services issues permits related to septic systems, and septic approval is a prerequisite when a building project uses or changes an on-site system.4 Depending on the system and circumstances, the approving authority may be the Nantucket Board of Health or MassDEP.5

When a Title 5 or local inspection is required, an authorized Board of Health agent who is certified as a Massachusetts system inspector and soil evaluator must witness it; the system must be uncovered, a tape-survey sketch included, and results submitted to the approving authority within 30 days.13 USDA soil data rate 0% of county soils as free of severe limitations for a conventional drain field, so budget for site evaluation rather than assuming a conventional layout will work.14 Parcels abutting a public way where the town has provided both a drain and sewer must connect sewage as directed by the sewer authority.15

Can you live in an RV or tiny home in Nantucket County?

We could not confirm a Nantucket rule that allows or prohibits living in an RV on private land, or a countywide rule for temporary camping. Ask Planning & Land Use Services about the parcel's zoning and proposed duration before buying land for that use.6

Massachusetts requires designated seasonal communities, including municipalities in Nantucket County, to adopt local bylaws before qualifying tiny houses can be built; a qualifying tiny house is detached, contains a dwelling unit no larger than 400 square feet excluding lofts, is designated for year-round housing, and must meet state and local building codes.7 The available Nantucket material does not confirm the local tiny-house permission needed for a specific parcel, so bring PLUS a site plan and the intended foundation or movable-unit details.6 A manufactured home may temporarily replace an owner-occupied residence destroyed by fire or another natural disaster for no more than 12 months while rebuilding, subject to the state sanitary code.16

Building a home in Nantucket County: what are the steps?

  1. Identify the parcel's base zoning district and every overlay in the official GIS materials, then ask Planning & Land Use Services to confirm allowed use and dimensional controls.126
  1. If the land is being divided, contact the Planning Board because it reviews residential subdivisions and may require a Subdivision Lot Release Form before the building-permit process.17
  1. Determine whether the site will connect to sewer or use an on-site system; Health & Human Services issues septic permits, while the Board of Health or MassDEP may be the approving authority.45
  1. Submit the building and related trade or zoning applications through the permit system and confirm fees with PLUS because fees vary by application type.1011
  1. Schedule the inspections required for the building work and, when applicable, the witnessed septic inspection.113

What should you check before buying land in Nantucket County?

Confirm zoning before closing: Nantucket has commercial and residential districts plus overlays, and parcel-specific permissions come from the applicable map and code.12 Ask PLUS for the controlling setbacks, lot coverage, height, flood-hazard overlay requirements and any Historic District Commission review because the available material does not supply one parcel-wide answer.6

Treat wastewater feasibility as an early design constraint because USDA data rate 0% of county soils as free of severe limitations for conventional drain fields.14 Confirm whether the parcel has sewer access or needs an approved on-site system with Health & Human Services.5 Also verify legal access and subdivision status; the Planning Board reviews residential subdivisions.17 For carrying-cost context, the county's median property-tax bill is $2,985 per year and the typical home-insurance premium estimate is $15,638 per year, but parcel and policy quotes can differ.1819

Watch-outs

  • Do not assume a small house bypasses local review: Nantucket requires building permits, while parcel rules vary by zoning district and overlay.12
  • RV occupancy and temporary camping on private land remain unconfirmed; ask Planning & Land Use Services about the exact parcel and intended duration.6
  • Conventional septic feasibility is a major due-diligence issue because 0% of county soils are rated free of severe drain-field limitations.14
  • Planning application fees depend on application type, so verify the amount directly and be wary of payment requests received after filing.113

Sources

  1. Town of Nantucket - Permits (2026 county census)
  2. Town of Nantucket Bylaws, quoted and re-checked
  3. Planning & Land Use Services (PLUS) (nantucket-ma.gov)
  4. Town of Nantucket, MA Building Permit and Certificate of Occupancy Process, quoted and re-checked
  5. Health & Human Services, quoted and re-checked
  6. Planning & Land Use Services (PLUS) (nantucket-ma.gov)
  7. Massachusetts General Laws Chapter 23B, Section 32 (Massachusetts statewide rule), quoted and re-checked
  8. Massachusetts 780 CMR Homeowner Construction Supervisor License Exemption Affidavit (2026 county census)
  9. General Law - Chapter 40A, Section 3 (Massachusetts statewide rule), quoted and re-checked
  10. Citizen Self Service Portal (nantucket-ma.gov)
  11. FAQs, quoted and re-checked
  12. GIS Maps, quoted and re-checked
  13. Septic System Inspection Report, quoted and re-checked
  14. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  15. Massachusetts General Laws Chapter 83, Section 5 (Massachusetts statewide rule), quoted and re-checked
  16. Massachusetts General Laws Chapter 40A, Section 3 (Massachusetts statewide rule), quoted and re-checked
  17. Planning Board, quoted and re-checked
  18. Median property tax bill: Bolthole Index county data
  19. Typical home insurance premium: Bolthole Index county data

Written September 28, 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.

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County locator

Nantucket County in Massachusetts

57
County map
Nantucket County highlighted among the Massachusetts counties · colored by Index score

How Nantucket County scores

Seclusion50100% ev.
Self-Sufficiency5499% ev.
Admin Boringness42100% ev.
Durability58100% ev.
Property Autonomy44100% ev.
Carry Cost32100% ev.

Evidence strength: 100%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$3172kTypical home
0.2%Property tax
$14,302Land / acre
43.7"Annual rain
2.7% of yrsSevere drought
0 / yr (+0)Mid-century 100°F days
13.1 daysMid-century dry spell
2.26" (+9.2%)Mid-century 1-day rain
1.25×Wildfire change factor
100%Forward climate coverage
$15,638Home insurance / yr
4.1% / yrInsurance growth
0.4%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
12,493People within 30 min
13,021Radius comparison (15 mi)
312.7People / sq mi
0%Federal land
96.3%Land at 15% slope or less
0%Septic soil without severe limits
0 acWorkable land screen
30.5%Wooded land
25.7 tonsBiomass / forest ac
50.7°FAvg temp

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Answers from the rulebook for Nantucket County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Nantucket County rules

  • County-wide zoningPresent (with conditions)

    The consolidated Town and County of Nantucket zoning framework.

    • The official Town and County site identifies Chapter 139 as the Town of Nantucket Zoning chapter; Nantucket is a consolidated town-county jurisdiction.
    • Specific zoning permissions and dimensional controls depend on the applicable zoning district and overlay.
    “The code of the Town of Nantucket (including Chapter 139 Zoning, Chapter 136 Wetlands, Chapter 137 Wharves and Waterways)”
  • Zoning districtsPublished (with conditions)

    Nantucket zoning districts and overlay districts shown in official Town GIS materials.

    • The official GIS page provides maps; parcel-specific applicability must be determined from the zoning map and code.
    • The page identifies commercial and residential zoning areas and multiple overlay districts.
    “Island Zoning Districts (PDF) -Shows the commercial and residential zones of Nantucket”
  • Who permits septicMixed (with conditions)

    On-site sewage systems in Nantucket.

    • The Nantucket Health & Human Services Department issues septic permits and the Nantucket Board of Health administers local inspections; Massachusetts Title 5 and DEP approval-authority provisions also apply.
    • The applicable approving authority may be the Board of Health or DEP depending on the system and circumstances.
    “Approving Authority (Board of Health or DEP)”
  • Septic permitRequired

    Projects requiring septic approval in Nantucket.

    • The official building-process document lists septic permit approval from the Health and Human Services Department among approvals to complete before beginning the building-permit process.
    • Requirements depend on whether the project uses or changes an on-site system.
    “The Health & Human Services Department issues permits related to food establishments, pools, septic systems”
  • Septic inspectionRequired

    Title 5 and Nantucket Board of Health septic inspections when an inspection is required for the system or transaction.

    • Inspections must be witnessed by an authorized Board of Health agent certified as a Massachusetts system inspector and soil evaluator.
    • Systems must be uncovered and a tape survey sketch included; inspection results must be submitted to the approving authority within 30 days.
    • The cited materials do not establish that every septic system requires inspection in every circumstance.
    “ALL INSPECTIONS SHALL BE WITNESSED BY AN AUTHORIZED AGENT OF THE BOARD OF HEALTH”
  • Subdividing landRegulated (with conditions)

    Residential subdivision and subdivision-related development in Nantucket.

    • The Planning Board reviews residential subdivisions.
    • A Subdivision Lot Release Form (Form J) from the Planning Board is listed among applicable prerequisites to the building-permit process.
    • The exact subdivision standards and deadlines may vary by application type.
    “The Planning Board’s mission is to review residential subdivisions”
  • Permit feesVariable (with conditions)

    Planning Board application fees in Nantucket.

    • The official FAQ states that fees depend on the type of application; no complete current fee schedule was established in the opened pages.
    • The Nantucket Zoning Bylaw is sold by the Town Clerk for $50.00, which is a document fee rather than a general permit fee.

    zoning bylaw copy: 50 USD (Town Clerk sale price stated on the FAQ page)

    “Fees are based upon the type of application you are presenting.”
  • Building permitRequired

    The consolidated Town and County of Nantucket runs its own Building Department (2 Fairgrounds Road) enforcing the Massachusetts State Building Code (780 CMR); a building permit is required to erect, construct, alter, or move a structure.

    Town of Nantucket - Permits ↗Scouted from the county site, not yet independently re-checked

  • Owner-builder exemptionAvailable

    Under the statewide Massachusetts State Building Code (780 CMR homeowner provision), an owner-occupant of a one- or two-family dwelling may perform work without a construction supervisor license, though a permit is still required.

    Massachusetts 780 CMR Homeowner Construction Supervisor License Exemption Affidavit ↗Scouted from the county site, not yet independently re-checked

Massachusetts rules that apply here

  • Minimum dwelling sizeNone

    Local zoning ordinances and bylaws statewide, as to the interior area of a single-family residential building.

    • This finding concerns zoning regulation; state building-code requirements are not eliminated.
    • The cited statute separately permits reasonable bulk and height, yard-size, lot-area, setback, open-space, parking, and building-coverage regulations for land or structures used for specified religious or educational purposes.
    “No zoning ordinance or by-law shall regulate or restrict the interior area of a single family residential building”
  • Tiny homesLimited

    Tiny-house dwelling occupancy in municipalities designated as Massachusetts seasonal communities.

    • A tiny house must be a detached structure containing a dwelling unit of 400 square feet or less, excluding lofts.
    • The seasonal community must adopt bylaws or zoning ordinances permitting construction of tiny houses.
    • Tiny houses must be designated for year-round housing and meet all state and local building-code requirements.
    • Any qualifying undersized-lot housing may not be used as a seasonal home or short-term rental of less than 6 months and must be used as year-round housing.
    • A movable tiny house must be registered with the Registry of Motor Vehicles, as applicable.
    • The municipality must be in a designated seasonal community; the statute requires designation for municipalities in Dukes and Nantucket counties and specified municipalities in Barnstable and Berkshire counties, and permits additional designations.

    maximum floor area: <= 400 square feet excluding lofts · minimum year-round occupancy period: >= 10 months per year (The statute defines year-round housing as principal-residence occupancy for not less than 10 months a year.)

    “A seasonal community shall: [...] adopt by-laws to permit the construction of tiny houses provided that such tiny houses are designated for use as year-round housing units”
  • Manufactured homesLimited

    Placement and occupancy of a manufactured home on the site of a Massachusetts residence destroyed by fire or another natural holocaust while the residence is being rebuilt.

    • The person must be the owner and occupier of the destroyed residence.
    • The manufactured home must be placed on the site of that residence.
    • Occupancy may not exceed 12 months while the residence is being rebuilt.
    • The manufactured home remains subject to the Massachusetts state sanitary code.

    maximum occupancy period: <= 12 months (While the residence is being rebuilt.)

    “period not to exceed twelve months while the residence is being rebuilt.”
  • Accessory dwellingsAllowed (with conditions)

    A single accessory dwelling unit, or its rental, in a single-family residential zoning district in Massachusetts cities and towns.

    • The use may be subject to reasonable regulations, including applicable 310 CMR 15.000 requirements, site-plan review, dimensional setbacks, and bulk and height regulations.
    • Municipal restrictions or prohibitions on short-term rental may apply.
    • Owner occupancy of either the accessory dwelling unit or principal dwelling is not required.
    • No more than one additional parking space may be required.
    • No additional parking space may be required for an accessory dwelling unit located not more than 0.5 miles from a commuter rail station, subway station, ferry terminal, or bus station.
    • More than one accessory dwelling unit, or rental thereof, in a single-family residential zoning district requires a special permit.
    • The unit must otherwise satisfy the statutory definition, including sleeping, cooking, and sanitary facilities, a separate entrance, and a maximum gross floor area of the lesser of one-half the principal dwelling's gross floor area or 900 square feet.

    maximum gross floor area: the lesser of 50% of the principal dwelling's gross floor area or 900 square feet · additional parking spaces: <= 1 space per accessory dwelling unit (No additional space may be required within 0.5 miles of a commuter rail station, subway station, ferry terminal, or bus station.)

    “No zoning ordinance or by-law shall prohibit [...] a single accessory dwelling unit”
  • Off-grid sanitationLimited

    Alternative or off-grid sewage handling on parcels abutting a public sewer in a Massachusetts town.

    • When a town has provided both a drain and a sewer in a public way, sewage must be connected to the sewer as directed by the responsible sewer authority.
    • This claim does not establish a statewide rule for parcels without access to a public sewer.
    “When a town has provided both a drain for waters and a sewer for sewage in a public way, the owner of every parcel of land abutting on such way or connected with such drain or sewer shall arrange his plumbing so that the waters shall be kept separate from the sewage; and shall make such connections with the drain and sewer respectively that the waters shall pass into the drain and the sewage into the sewer in accordance with the directions of the board or officer having charge of the repair and maintenance of sewers in such town.”
  • Agricultural exemptionAvailable (with conditions)

    Commercial agriculture, aquaculture, silviculture, horticulture, floriculture, and viticulture land uses and related structures under Massachusetts local zoning law.

    • The statutory protection applies when, during June, July, August, and September or during the harvest season of the primary crop, 25 percent of products for sale based on gross sales dollars or volume were produced by the owner or lessee on the parcel; alternatively, 25 percent were produced on the parcel and at least an additional 50 percent were produced in Massachusetts on other qualifying land.
    • Activities may be limited to parcels of 5 acres or more, or to parcels of 2 acres or more in areas not zoned for the listed agricultural uses when annual sales generated from the use are at least $1,000 per acre based on gross sales dollars.
    • Land divided by a public or private way or waterway is construed as one parcel for this section.
    • The exemption does not exempt land or structures from floodplain or wetlands regulations established under the General Laws.
    • Agriculture has the meaning given in Chapter 128, Section 1A; horticulture includes growing and keeping nursery stock and its sale.
    • Agriculture, aquaculture, floriculture, and horticulture do not include marijuana-related growing, cultivation, distribution, or dispensation as described in the cited statutes, although a municipality may allow commercial marijuana growing and cultivation by zoning on land used for commercial agriculture, aquaculture, floriculture, or horticulture.

    on-parcel production threshold: >= 25 percent (During June, July, August, September, or the primary crop’s harvest season; measured by gross sales dollars or volume.) · additional Massachusetts production threshold: >= 50 percent (Alternative test requiring at least 25 percent on-parcel production and additional production elsewhere in Massachusetts.) · minimum parcel size: >= 5 acres (Activities may be limited to parcels of 5 acres or more.) · alternative minimum parcel size: >= 2 acres (In areas not zoned for the listed agricultural uses, only if annual sales are at least $1,000 per acre based on gross sales dollars.) · annual sales threshold: >= 1000 USD per acre (Applies to the 2-acre alternative in areas not zoned for the listed agricultural uses.)

    “nor shall any such ordinance or by-law prohibit, unreasonably regulate, or require a special permit for the use of land”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Minimum lot size — Minimum lot-size requirements in Nantucket zoning districts.
  • Setbacks — Required setbacks in Nantucket zoning districts.
  • Lot coverage — Lot-coverage requirements in Nantucket zoning districts.
  • Building height — Building-height requirements in Nantucket zoning districts and overlay districts.
  • Living in an RV — RV occupancy on private land in Nantucket.
3 more unanswered
  • Camping on your land
  • 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.

Living off-grid in Nantucket County, Massachusetts

Is Nantucket County a good place to live off-grid or homestead?

Nantucket County scores 57/100 on the Bolthole Index, a solid county profile. Watch-outs: higher long-term carry cost.

Do you need a building permit in Nantucket County, Massachusetts?

Nantucket County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Nantucket Board of Health (Title 5 / 310 CMR 15, MassDEP State Environmental Code). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Nantucket County, Massachusetts?

Land in Nantucket County runs about $14,302 per acre, based on the latest county data.

What is the water situation in Nantucket County?

Nantucket County gets about 43.7" of rain a year, with severe drought in roughly 2.7% of years.

How remote is Nantucket County?

A typical private-land location has about 13,021 people within 15 miles and 7,462,034 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

Off-grid gear

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

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How Nantucket compares in Massachusetts

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