Bolthole Index

Franklin County, Massachusetts

Building permits, zoning and septic rules in Deerfield, Massachusetts

The Town of Deerfield, Massachusetts requires a building permit for new homes, additions and garages, issued through the town's Inspection Services office1. Deerfield adopts and administers its own Zoning By-law (Chapter 179) rather than relying on Franklin County2. Septic systems follow the state Title 5 code and are permitted by the local Board of Health, not a county office3.

At a glance

Building permit
Required for new homes, additions and garages; apply through the town's online portal14
Zoning
Town Zoning By-law (Chapter 179) with several districts and overlay districts25
Septic
State Title 5 code, permitted locally by the Board of Health36
Accessory apartment
Allowed in owner-occupied houses, up to 900 sq ft under the town by-law7
RV or tiny home living
Not confirmed for Deerfield; ask the Planning Board8
Owner-builder
Homeowners may pull a permit for their own primary residence9
Minimum home size
State law bars zoning from regulating the interior area of a single-family home10

Who to call

Building permits

Town of Deerfield Inspection Services (Building Department)

Building, electrical, plumbing and gas permits and inspections inside Deerfield

413-665-1400 Ext. 108

8 Conway Street, South Deerfield, MA 01373

Online permits →

Zoning

Town of Deerfield Planning Board (Land Use)

Planning Board site plan review and special permits; zoning questions inside Deerfield

413-665-1400

[email protected]

8 Conway Street, South Deerfield, MA 01373

Septic permits

Town of Deerfield Board of Health

Septic (Title 5), private well and local health questions inside Deerfield

413-665-1400, ext. 109

8 Conway Street, South Deerfield, MA 01373

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

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Do you need a building permit in Deerfield, Massachusetts?

Yes. The Town of Deerfield states that all work to construct, repair, renovate or demolish a structure requires a building permit, and that new homes, additions and garages are on the list1. Storage sheds over 200 square feet need one too1. The state building code is the code for every building in a Massachusetts town and local inspectors enforce it11.

The town's Building Department has a maximum of 30 days to issue or deny a building permit1. Electrical, plumbing and gas work are permitted separately from the building permit1.

A homeowner building their own primary residence may apply for the permit without a construction supervisor license under the state homeowner exemption9. That exemption is about licensing, not about skipping the permit or the inspections12.

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

Deerfield issues its own building permits through Inspection Services1, which works from the municipal offices in South Deerfield1. Franklin County has no county government, so no county building department is involved4.

Applications are accepted through the town's electronic permitting portal, and staff will help in the office if you lack computer access1. Call the office at 413-665-1400 Ext. 1081.

A neighboring town's office will not help you here. Greenfield's building department, for example, serves only Greenfield, so use Deerfield's office for any Deerfield parcel.

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

Deerfield has its own zoning. The town adopts and administers its Zoning By-law (Chapter 179), not county zoning2. The by-law names Residential-Agricultural (RA), Center Village Residential (CVRD), Small Business (C-I), Commercial (C-II), Industrial (I), Planned Industrial (PI) and Expedited Permitting District (EPD) districts5. Overlay districts for watershed, flood plain, wireless, adult use and marijuana add further rules2.

Minimum lot sizes, setbacks, building height and lot coverage all vary by district and sit in the by-law's dimensional table1314. Find your parcel's district before you assume any number.

We could not confirm Deerfield's rules on living in an RV or a tiny home on your own lot. The by-law's camping provision covers only campgrounds in one district and does not set a rule for the rest of town15. Ask the Planning Board before buying for that purpose8.

Accessory apartments are allowed in owner-occupied houses and may not exceed 900 square feet7.

How do septic permits work in Deerfield?

Septic permits for Deerfield come from the local health authority, not the county. Massachusetts law makes the city, town or district board of health the permitting authority for residential systems serving no more than four dwelling units, and the board must act on a completed application within 45 days6. The Deerfield Board of Health lists Title 5 wastewater and septic rules on its page16.

Expect deep observation holes and percolation tests in the application6. USDA rates only about 1.4% of Franklin County soils as not limited for a conventional drain field, so most lots need a careful site evaluation and some need an engineered system17.

We could not confirm Deerfield's own septic permit procedure or fees. Call the Board of Health at 413-665-1400, ext. 10916. Parcels on the town's public sewer follow different rules: a building sewer permit is required before work, and an existing septic tank must be pumped, crushed, filled and inspected first18.

Building a home in Deerfield: the steps, in order

  1. Confirm the parcel's zoning district and dimensional rules in the Zoning By-law, then talk with the Planning Board about any special permit or site plan review58.
  2. If any part of the lot is in the flood plain overlay, the Planning Board is the special permit authority there19.
  3. Splitting a lot first means taking a plan to the Planning Board under the state subdivision control law20.
  4. Get septic design and Board of Health approval, or a building sewer permit if you connect to the town sewer618.
  5. Apply for the building permit through the town portal, with electrical, plumbing and gas permits separately1.
  6. Schedule final inspections through the portal to receive the certificate of occupancy1.

What stays with Franklin County and the state, and what to check before you buy in Deerfield

Franklin County runs no zoning or building permits for Deerfield land. For land outside Deerfield, see the Franklin County page, because each town sets its own zoning21.

Before buying, confirm the district, flood plain status and whether public sewer reaches the lot. Private well drilling needs a state-certified driller, and a town may require a local site permit22.

Countywide figures: farmland averages about $8,637 per acre23, and the effective property tax rate is 1.5%24, a median bill of $4,595 a year25. The county is about 86.6% wooded26.

Watch-outs

  • Deerfield's numeric lot size, setback and height limits depend on the zoning district, so read the dimensional table for your parcel before offering on land13.
  • We could not confirm whether Deerfield allows long-term RV or tiny-home living on a private lot; ask the Planning Board before you buy8.
  • Land in the flood plain overlay district needs a special permit from the Planning Board19.
  • Deerfield's septic permit procedure and fees were not confirmed; call the Board of Health first16.

Sources

  1. Town of Deerfield Inspection Services (Building Department) (deerfieldma.us)
  2. Chapter 179 Zoning Bylaws (approved 10/2023), Town of Deerfield (Town of Deerfield), quoted and re-checked
  3. MassDEP - 310 CMR 15.000 Septic Systems (Title 5) (2026 county census)
  4. Massachusetts State Building Code 780 CMR 51.00 (Residential Code) (2026 county census)
  5. Chapter 179 Zoning Bylaws (approved 10/2023), Town of Deerfield (Town of Deerfield), quoted and re-checked
  6. Massachusetts General Laws Chapter 111, Section 31E, quoted and re-checked
  7. Chapter 179 Zoning Bylaws (approved 10/2023), Town of Deerfield (Town of Deerfield), quoted and re-checked
  8. Town of Deerfield Planning Board (Land Use) (deerfieldma.us)
  9. Mass.gov - Massachusetts law about home improvement (homeowner exemption) (2026 county census)
  10. General Law - Chapter 40A, Section 3 (Massachusetts statewide rule), quoted and re-checked
  11. Massachusetts General Laws Chapter 143, Section 3A, quoted and re-checked
  12. Massachusetts General Laws, Chapter 142A, Section 14 (Massachusetts statewide rule), quoted and re-checked
  13. Chapter 179 Zoning Bylaws (approved 10/2023), Town of Deerfield (Town of Deerfield), quoted and re-checked
  14. Chapter 179 Zoning Bylaws (approved 10/2023), Town of Deerfield (Town of Deerfield), quoted and re-checked
  15. Chapter 179 Zoning Bylaws (approved 10/2023), Town of Deerfield (Town of Deerfield), quoted and re-checked
  16. Town of Deerfield Board of Health (deerfieldma.us)
  17. 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
  18. Sewer Use Regulations (Board of Sewer Commissioners, 12/03/2025), Town of Deerfield (Town of Deerfield), quoted and re-checked
  19. Chapter 179 Zoning Bylaws (approved 10/2023), Town of Deerfield (Town of Deerfield), quoted and re-checked
  20. Massachusetts General Laws c. 41, § 81O (Massachusetts statewide rule), quoted and re-checked
  21. Massachusetts General Laws Chapter 40A, Section 1A, quoted and re-checked
  22. Massachusetts General Laws Chapter 21G, Section 20 (Massachusetts statewide rule), quoted and re-checked
  23. Farmland value per acre (USDA census): Bolthole Index county data
  24. Effective property tax rate: Bolthole Index county data
  25. Median property tax bill: Bolthole Index county data
  26. Wooded share of land: Bolthole Index county data

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 Town of Deerfield

Town of Deerfield’s own rules

  • Local zoningPresent (with conditions)

    Land inside Deerfield town limits. The Town adopts and administers its own Zoning By-law (Chapter 179), not county zoning.

    • Zoning is administered under Chapter 179 Zoning Bylaws, which divides the town into districts (see zoning_districts claim).
    • Overlay districts (watershed, flood plain, wireless, adult use, marijuana) add further rules.
    “for the purposes of this by-law, the town of deerfield is hereby divided into the following districts:”
  • Zoning districtsPublished (with conditions)

    Land inside Deerfield town limits

    • Districts named in § 2110: Residential-Agricultural (RA), Center Village Residential (CVRD), Small Business (C-I), Commercial (C-II), Industrial (I), Planned Industrial (PI), and Expedited Permitting District (EPD).
    “for the purposes of this by-law, the town of deerfield is hereby divided into the following districts:”
  • Minimum lot sizeDistrict specific (with conditions)

    Land inside Deerfield town limits, by zoning district in the § 2320 dimensional table (RA, CVRD, C-I, C-II, I, PI, EPD). Numeric values per district were not reliably extracted and are not stated here.

    • Dimensional requirements apply to any structure erected or used, premises used, or lot changed in size or shape (§ 2310).
    • Numeric minimum lot sizes must be read from the § 2320 table for the applicable district (follow-up queued).
    “2320. table of dimensional requirements. [amended 4-26-2004 atm, art. 32; 4-26-2010 atm, art. 1; 10-28-2013 stm, art. 21; 10-4-2021 stm by art. 8]”
  • SetbacksDistrict specific (with conditions)

    Land inside Deerfield town limits, by zoning district in the § 2320 table (front, side, rear yard, perimeter setbacks). Numeric values per district not extracted.

    • Setbacks are in the § 2320 dimensional table; a perimeter setback row also appears there.
    “2320. table of dimensional requirements. [amended 4-26-2004 atm, art. 32; 4-26-2010 atm, art. 1; 10-28-2013 stm, art. 21; 10-4-2021 stm by art. 8]”
  • Lot coverageDistrict specific (with conditions)

    Land inside Deerfield town limits, by zoning district in the § 2320 table (maximum lot coverage by impervious surfaces, %).

    • Low impact development techniques such as pervious pavers are addressed in the table notes; the solar-system exemption in § 3862 refers to § 2320 maximum lot coverage.
    “2320. table of dimensional requirements. [amended 4-26-2004 atm, art. 32; 4-26-2010 atm, art. 1; 10-28-2013 stm, art. 21; 10-4-2021 stm by art. 8]”
  • Building heightDistrict specific (with conditions)

    Land inside Deerfield town limits, by zoning district in the § 2320 table (max. building height in feet). Numeric values per district not extracted.

    • Height limit is in the § 2320 dimensional table (row labeled max. building height (feet)).
    “2320. table of dimensional requirements. [amended 4-26-2004 atm, art. 32; 4-26-2010 atm, art. 1; 10-28-2013 stm, art. 21; 10-4-2021 stm by art. 8]”
  • Camping on your landLimited

    Campgrounds with tents and recreational vehicles in the district the bylaw calls the TOD (special permitted use there). Does not establish camping rules for the rest of the town.

    • Allowed only by special permit in the TOD.
    • Camping events are limited to no more than three times per calendar year and no more than four consecutive days per event.

    camping events per year: <= 3 events per calendar year (TOD special permitted campground use only)

    “campgrounds offering temporary accommodations for travelers and other transient guests including, but not limited to, the use of tents and recreational vehicles; provided, however, that camping events shall occur no more than three (3) times per calendar year, and for no more than four (4) consecutive days per”
  • Accessory dwellingsLimited

    Accessory apartments on lots inside Deerfield town limits under Zoning By-law § 3900

    • Accessory apartments are installed only in owner-occupied houses under § 3910.
    • Accessory unit is not larger than 900 sq ft, excluding unfinished attic and basement, garage and porch (§ 3920).
    • Must keep a separate entrance and meet state building code egress requirements (§ 3920(i)).

    maximum floor area: <= 900 square feet (excluding unfinished attic and basement, garage and porch)

    “is not larger in floor area than 900 square feet, excluding unfinished attic and basement, garage and porch;”
  • Mandatory utility hookupConditional

    Building sewer connection to the Town public sewer for work inside Deerfield town limits, under the Board of Sewer Commissioners' Sewer Use Regulations

    • A building sewer permit is required before work, and the applicant must notify the superintendent of public works before installation and before connection.
    • Existing septic tanks must be pumped, crushed and filled, then inspected by the superintendent of public works before any approval is granted.
    • No rule requiring a home to connect when public sewer is available was located; the mandatory-connection rule and any water-connection rule were not verified.
    “the applicant must notify the superintendent of public works a second time when the building sewer is ready for inspection and connection to the public sewer.”
  • Building in a floodplainRequired

    Development within the flood plain overlay district (§ 4300) inside Deerfield town limits

    • Planning Board is the special permit granting authority for the floodplain district.
    • In A1-30, AH and AE zones, recreational vehicles must be elevated and anchored, be on site for less than 180 consecutive days, or be fully licensed and highway ready (§ 4300 exemption text).
    “a. the planning board shall be the special permit granting authority for the floodplain district.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Town of Deerfield or Franklin County directly.

  • Building permit — Building permits for new homes inside Deerfield town limits
  • Owner-builder exemption — Owner-builder permit exemption inside Deerfield town limits
  • Building code adopted — State building code adoption for Deerfield town
  • Inspections — Building inspections inside Deerfield town limits
  • Certificate of occupancy — Certificate of occupancy for new homes inside Deerfield town limits
14 more unanswered
  • Minimum dwelling size
  • Living in an RV
  • Tiny homes
  • Manufactured homes
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • Short-term rentals
  • 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.

Unanswered questions are usually a sign that Town of Deerfield publishes no rule on the point, not that none exists. Franklin County’s page lists the county offices to call.

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