Bolthole Index

Franklin County, Massachusetts

Building permits, zoning and septic rules in Franklin County, Massachusetts

67Index Score / 100
#1 of 14 in Massachusetts

Franklin County, Massachusetts has no county government at all, so there is no county building department, zoning office or septic authority to call1. A building permit is required everywhere in the county under the statewide Massachusetts building code, but it is issued and enforced by each of the county's individual towns, not by the county1. Zoning is likewise adopted and enforced town by town under the state Zoning Act2, and septic systems statewide follow the Title 5 code (310 CMR 15.000) with permits issued by each town's Board of Health3. This guide uses Greenfield, the county's traditional county seat and largest city, as a worked example of what one Franklin County town requires; your own town's offices will differ.

At a glance

Building permit
Required statewide under 780 CMR, issued by each town, not the county1
Zoning
Rules, districts and dimensional controls vary by municipality4
Septic
State Title 5 code, permitted locally by each town's Board of Health3
Owner-builder exemption
Yes, for a homeowner's own primary residence under 780 CMR 110.R55
Minimum home size
No zoning ordinance statewide may regulate the interior area of a single-family home6
Accessory dwelling unit
Allowed by right in single-family zoning districts, but towns may restrict short-term rentals78
Example: Greenfield building permit office
City of Greenfield Building Inspections Department, 413-772-14049

Who to call

Building permits

City of Greenfield Building Inspections Department

Building, electrical, plumbing and gas permits and inspections for the City of Greenfield, used here as an example of one Franklin County town's building department

413-772-1404

20 Sanderson Street, Greenfield, MA 01301

Zoning

City of Greenfield Planning & Development Department

Zoning administration, the Planning Board and the Zoning Board of Appeals for the City of Greenfield, used here as an example of one Franklin County town's zoning office

413-772-1548

20 Sanderson Street, Greenfield, MA 01301

Health department

City of Greenfield Health Department (Board of Health)

Title 5 septic system review and other local health permitting for the City of Greenfield, used here as an example of one Franklin County town's Board of Health

413-772-1404

20 Sanderson St., Greenfield, MA 01301

Contact details are copied from each office’s official page and were checked against it on September 29, 2026.

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

Yes, a building permit is required everywhere in Franklin County under the statewide Massachusetts building code (780 CMR), but there is no county-level office that issues it — Franklin County has no county government, so permits are issued and enforced by each individual town's building inspector1. In Greenfield, the county's largest city and traditional county seat, the Building Inspections Department administers state building, electrical, plumbing and gas codes and enforces the city's own zoning ordinance on top of them9. If you buy land in a different Franklin County town, expect a similar process at that town's own building department rather than Greenfield's. Homeowners get one statewide break: an owner may apply for a permit on their own primary residence under a homeowner exemption in the building code, without needing a licensed construction supervisor, though a contractor cannot use this exemption5.

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

Because Franklin County has no county government, there is no single county building department to call1. Greenfield's Building Inspections Department is one working example: it is reachable at 413-772-1404, and permit applications can be mailed to City Hall at 14 Court Square or dropped off at the department's office at 20 Sanderson Street9. Zoning applications and land-use permit questions in Greenfield go to the separate Planning & Development Department, which assists applicants with land use permits and the municipal boards and commissions that review them10. Every one of Franklin County's other towns has its own equivalent building and planning offices; confirm the right town before you call, since Greenfield's numbers only apply inside Greenfield.

Does Franklin County have zoning?

Franklin County itself has no zoning power because it has no county government; Massachusetts cities and towns adopt the zoning ordinances and bylaws that regulate land, buildings and structures24. The zoning district, allowed uses, dimensional controls and enforcement authority therefore vary by municipality across Franklin County4. In Greenfield, the Planning & Development Department administers the city's own zoning ordinance and helps applicants with land-use permits10. Local zoning cannot regulate the interior area of a single-family home6. A single accessory dwelling unit is allowed by right in a single-family zoning district, subject to reasonable local rules and a maximum area of the lesser of half the main home's floor area or 900 square feet7. A town may also restrict or prohibit short-term rental of an accessory dwelling unit8.

How do septic permits work in Franklin County?

Septic systems throughout Franklin County follow the statewide Title 5 code (310 CMR 15.000), but the permit itself is issued and enforced locally by each town's own Board of Health rather than by any county or state office3. In Greenfield, the Health Department reviews and assesses septic systems and coordinates with the DPW on safe sewer and water supplies11. Soil is the practical constraint here: only about 1.4% of Franklin County's soils are rated without severe limits for a conventional septic drain field in USDA's survey, so plan on a percolation test and a real chance you will need an engineered, mound or other alternative Title 5 system rather than a standard gravity field123. One narrow statewide rule can override a septic plan: if your parcel abuts a street where the town has already installed both a public drain and a public sewer, state law requires you to connect your plumbing to that sewer instead of using a septic system — this does not create a general rule requiring a sewer connection on land with no public sewer nearby13.

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

The applicable zoning rules for an RV or tiny house vary by Franklin County municipality, including local districts and dimensional controls4. We could not confirm a Franklin County-wide rule for long-term RV occupancy, temporary camping or tiny-home occupancy, so ask the planning or zoning office in the town where the parcel lies. The statewide seasonal-community tiny-house provision is conditional on local adoption and does not by itself establish permission on a Franklin County parcel14. Massachusetts does allow an owner whose residence was destroyed by fire or another natural disaster to place and occupy a manufactured home on that site for up to 12 months while rebuilding, subject to the state sanitary code15. If the proposed tiny home is an accessory dwelling unit, a town may restrict or prohibit its use as a short-term rental8.

Building a home in Franklin County: the steps, in order

  1. Identify which Franklin County town your land is in, since building, zoning and septic rules are set entirely by that town, not by the county2.
  2. Contact that town's planning or zoning office for a preliminary consultation before you design anything; in Greenfield this is the Planning & Development Department10.
  3. Have your soil tested for septic suitability early — under 1.4% of Franklin County's soils are free of severe limits for a conventional drain field, so many properties need an engineered or alternative Title 5 system123.
  4. Apply for your septic (Title 5) permit through your town's Board of Health, such as Greenfield's Health Department11.
  5. Apply for your building permit through your town's building inspector once septic and zoning approvals are in hand; in Greenfield that is the Building Inspections Department9.
  6. If you are the homeowner, ask about the owner-builder homeowner exemption, which lets you pull your own permit without a licensed construction supervisor for your primary residence5.
  7. Schedule required inspections during construction and apply for an occupancy permit from the building inspector once work is complete.

What to check before you buy land in Franklin County

Soils and septic are the biggest practical constraint: fewer than 1.4% of Franklin County's soils are rated free of severe limits for a conventional drain field, so get a percolation test before you commit to a price12. The county is heavily wooded and mostly gentle, with about 86.6% forest cover and 62.1% of land at 15% slope or less1617. It gets about 49.1 inches of precipitation a year and sits in severe drought in roughly 5% of years1819. The nearest city of 100,000 or more people is about 28 miles away in straight-line distance20. Home values run high for a rural county, with typical homes around $379,656 and farmland averaging about $8,637 an acre2122. Budget for property taxes too: the effective rate runs about 1.5%, with a median annual bill around $4,595, and typical homeowners insurance runs about $1,435 a year232425. If you plan to farm or homestead commercially, Massachusetts's statewide agricultural-use protection can shield qualifying farm land and structures from unreasonable local zoning restriction, subject to minimum parcel size and sales thresholds26.

Watch-outs

  • Franklin County has no county government, so nothing here about Greenfield's offices, phone numbers or fees applies in any other Franklin County town; confirm the right town before you call1.
  • Under 1.4% of Franklin County's soils are rated free of severe limits for a conventional septic drain field, so a percolation test before you buy is not optional in most of the county12.
  • The state's tiny-house allowance for undersized lots only applies in municipalities designated "seasonal communities," and no Franklin County town is on that list, so it does not create a tiny-home right here14.

Sources

  1. Massachusetts State Building Code 780 CMR 51.00 (Residential Code) (2026 county census)
  2. Mass.gov - Massachusetts law about zoning (MGL Ch. 40A) (2026 county census)
  3. MassDEP - 310 CMR 15.000 Septic Systems (Title 5) (2026 county census)
  4. Massachusetts General Laws Chapter 40A, Section 1A, quoted and re-checked
  5. Mass.gov - Massachusetts law about home improvement (homeowner exemption) (2026 county census)
  6. General Law - Chapter 40A, Section 3 (Massachusetts statewide rule), quoted and re-checked
  7. Massachusetts General Laws Chapter 40A, Section 3 (Massachusetts statewide rule), quoted and re-checked
  8. Massachusetts General Laws Chapter 40A, Section 1A, quoted and re-checked
  9. City of Greenfield Building Inspections Department (greenfield-ma.gov)
  10. City of Greenfield Planning & Development Department (greenfield-ma.gov)
  11. City of Greenfield Health Department (Board of Health) (greenfield-ma.gov)
  12. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  13. Massachusetts General Laws Chapter 83, Section 5 (Massachusetts statewide rule), quoted and re-checked
  14. Massachusetts General Laws Chapter 23B, Section 32 (Massachusetts statewide rule), quoted and re-checked
  15. Massachusetts General Laws Chapter 40A, Section 3 (Massachusetts statewide rule), quoted and re-checked
  16. Wooded share of land: Bolthole Index county data
  17. Share of land at 15% slope or less: Bolthole Index county data
  18. Annual precipitation: Bolthole Index county data
  19. Share of years in severe drought: Bolthole Index county data
  20. Distance to the nearest metro area: Bolthole Index county data
  21. Typical home value (Zillow): Bolthole Index county data
  22. Farmland value per acre (USDA census): Bolthole Index county data
  23. Effective property tax rate: Bolthole Index county data
  24. Median property tax bill: Bolthole Index county data
  25. Typical home insurance premium: Bolthole Index county data
  26. General Law - Chapter 40A, Section 3 (Massachusetts statewide rule), quoted and re-checked

Written September 29, 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

Franklin County in Massachusetts

67
County map
Franklin County highlighted among the Massachusetts counties · colored by Index score

How Franklin County scores

Seclusion50100% ev.
Self-Sufficiency68100% ev.
Admin Boringness43100% ev.
Durability77100% ev.
Property Autonomy44100% ev.
Carry Cost59100% 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 →

$380kTypical home
1.5%Property tax
$8,637Land / acre
49.1"Annual rain
5% of yrsSevere drought
0.7 / yr (+0.7)Mid-century 100°F days
10.4 daysMid-century dry spell
2.04" (+9%)Mid-century 1-day rain
1.39×Wildfire change factor
100%Forward climate coverage
$1,435Home insurance / yr
0.8% / yrInsurance growth
0.59%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
16,359People within 30 min
4,920,108People within 2 hr
100,138Radius comparison (15 mi)
101.3People / sq mi
1%Federal land
62.1%Land at 15% slope or less
1.4%Septic soil without severe limits
6,040 acWorkable land screen
86.6%Wooded land
82 tonsBiomass / forest ac
47.1°FAvg temp

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Answers from the rulebook for Franklin County

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

Franklin County rules

  • Local zoningVaries (with conditions)

    Aggregate local zoning across Franklin County municipalities and towns; the county claim does not mean Franklin County administers each local ordinance.

    • Massachusetts law describes zoning as ordinances and by-laws adopted by cities and towns.
    • The applicable zoning rules, districts, dimensional controls, and enforcement authority vary by municipality.
    “''Zoning'', ordinances and by-laws, adopted by cities and towns to regulate the use of land, buildings and structures to the full extent of the independent constitutional powers of cities and towns to protect the health, safety and general welfare of their present and future inhabitants.”
  • Building permitRequired

    A building permit is required under the statewide Massachusetts State Building Code (780 CMR), enforced by MUNICIPAL building inspectors appointed under MGL Ch. 143; Franklin County has no county government, so permits are issued at the town level, not by any county.

    Massachusetts State Building Code 780 CMR 51.00 (Residential Code) ↗Scouted from the county site, not yet independently re-checked

  • County-wide zoningPresent

    Zoning in Massachusetts is adopted and enforced at the MUNICIPAL (town) level under the Zoning Act (MGL Ch. 40A); Franklin County has no county government, so zoning is purely town-level.

    Mass.gov - Massachusetts law about zoning (MGL Ch. 40A) ↗Scouted from the county site, not yet independently re-checked

  • Who permits septicMassDEP Title 5 (310 CMR 15.000), administered locally by each town's Board of Health

    Septic systems are governed by the statewide Title 5 code (310 CMR 15.000) promulgated by MassDEP; permits are issued and enforced locally by each town's Board of Health (no county authority exists in Franklin County).

    MassDEP - 310 CMR 15.000 Septic Systems (Title 5) ↗Scouted from the county site, not yet independently re-checked

  • Owner-builder exemptionAvailable

    Homeowners may apply for a building permit on their own primary residence under the homeowner exemption in 780 CMR (110.R5), exempting them from the construction supervisor licensing requirement; contractors cannot use this exemption.

    Mass.gov - Massachusetts law about home improvement (homeowner exemption) ↗Scouted from the county site, not yet independently re-checked

Massachusetts rules that apply here

  • Zoning districtsPartial

    Massachusetts zoning districts, including the statutory requirement applicable to MBTA communities and locally adopted zoning districts.

    • Zoning ordinances and bylaws are adopted by cities and towns; the statewide statute does not provide one uniform zoning map or complete statewide district inventory.
    • For an MBTA community, at least one reasonable-size district must permit multifamily housing as of right, without age restrictions and suitable for families with children.
    • The required MBTA-community district must have a minimum gross density of 15 units per acre, subject to limitations under chapter 131 section 40 and Title 5 of the state environmental code, and must be within 0.5 miles of a commuter rail station, subway station, ferry terminal, or bus station, if applicable.
    • Local zoning amendments generally require public hearings and a two-thirds vote, subject to statutory exceptions.

    minimum gross density: >= 15 units per acre (Subject to further limitations imposed by section 40 of chapter 131 and Title 5 of the state environmental code.) · maximum distance from applicable transit: <= 0.5 miles (Applies to the MBTA-community district when a qualifying commuter rail station, subway station, ferry terminal, or bus station is applicable.)

    “An MBTA community shall have a zoning ordinance or by-law that provides for at least 1 district of reasonable size in which multi-family housing is permitted as of right; provided, however, that such multi-family housing shall be without age restrictions and shall be suitable for families with children.”
  • 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”
  • Short-term rentalsLimited

    Short-term rental restrictions applicable to accessory dwelling units in Massachusetts, including Franklin County municipalities.

    • Municipalities may impose restrictions or prohibitions on short-term rental of an accessory dwelling unit.
    • This claim is limited to short-term rental of accessory dwelling units; it does not establish a countywide rule for all short-term rentals.
    “is subject to such additional restrictions as may be imposed by a municipality, including, but not limited to, additional size restrictions and restrictions or prohibitions on short-term rental, as defined in section 1 of chapter 64G”

Still unanswered

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

  • Building code adopted — Massachusetts building-code adoption applicable in Franklin County.
  • Inspections — Building inspections in Franklin County.
  • Certificate of occupancy — Certificates of occupancy in Franklin County.
  • Minimum lot size — Minimum lot-size requirements in Franklin County municipalities.
  • Setbacks — Setback requirements in Franklin County municipalities.
13 more unanswered
  • Lot coverage
  • Building height
  • Living in an RV
  • Camping on your land
  • Septic permit
  • Septic inspection
  • Well permit
  • Mandatory utility hookup
  • Subdividing land
  • Driveway access
  • Building in a floodplain
  • Permit fees
  • Permit process

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 Franklin County, Massachusetts

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

Franklin County scores 67/100 on the Bolthole Index, a strong county profile. Its strengths: mixed durability signals and strong self-sufficiency basics: 49.1″/yr rainfall plus 86.6% wooded land.

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

Franklin County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by MassDEP Title 5 (310 CMR 15.000), administered locally by each town's Board of Health. 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 Franklin County, Massachusetts?

Land in Franklin County runs about $8,637 per acre, based on the latest county data.

What is the water situation in Franklin County?

Franklin County gets about 49.1" of rain a year, with severe drought in roughly 5% of years.

How remote is Franklin County?

A representative private-land location has about 16,359 people within a 30-minute drive and 4,920,108 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

Off-grid gear

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

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How Franklin compares in Massachusetts

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