Bolthole Index

Hampden County, Massachusetts

Building permits, zoning and septic in the Town of Southwick, MA

The Town of Southwick, Massachusetts handles building applications through its Building Department and administers its own zoning bylaw.12 Southwick’s Board of Health handles individual septic systems and private wells.3 Living in a trailer requires Building Inspector authorization and a Board of Health permit, so storing an RV is not permission to live in it.4

At a glance

Building applications
Town Building Department; online through PermitEyes1
Zoning
Town zoning bylaw and district map25
Septic and private wells
Southwick Board of Health3
RV living
Building Inspector authorization and Board of Health permit required for trailer occupancy4
Small homes
Single-family interior area cannot be restricted by zoning; building-code requirements still apply6
Accessory dwelling
A qualifying accessory dwelling is protected in single-family residential districts, subject to reasonable regulations7

Who to call

Building permits

Town of Southwick Building Department

Building applications and inspection requests; contact for zoning enforcement and proposed home construction.

413-569-1211

454 College Highway, Southwick, MA 01077

Online permits →

Zoning

Town of Southwick Planning Board

Land division, site-plan review and applicable special permits.

413-569-6056

454 College Highway, Southwick, MA 01077

Septic permits

Town of Southwick Board of Health

Individual septic systems, private wells and sanitation questions.

413-569-1212

454 College Highway, Southwick, MA 01077

Septic permits

Town of Southwick Board of Health online permitting

Online health applications and application status.

Online permits →

Building permits

Town of Southwick home-project application checklist

Minimum application documents for home projects.

Floodplain permits

Town of Southwick Conservation Commission

Wetland and resource-area review; ask Building Department about floodplain zoning.

413-569-6907

454 College Highway, Southwick, MA 01077

Contact details are copied from each office’s official page and were checked against it on October 12, 2026.

Off-grid gear

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

These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.

Do you need a building permit in the Town of Southwick, MA?

For a proposed home in Southwick, start with the town Building Department: Southwick publishes a minimum building-application checklist for construction, reconstruction, additions, alterations and repairs to family homes.8 Southwick’s building inspectors enforce state building codes within the town.1 Submit building applications through the town’s PermitEyes system, and call the Building Department for inspection requests rather than using the portal chat.1 For minor work, the building official may waive the requirement to file plans; that provision concerns plans, so ask the Building Department separately whether your specific project needs a building permit.8

Does the Town of Southwick have zoning, lot-size rules and setbacks?

Southwick administers its own zoning bylaw, and the zoning map is on file with the Town Clerk.25 Ask the Planning Board to identify the parcel’s district and any applicable special-permit review; the Board reviews land divisions and grants special permits for flexible residential developments and projects within the Wellhead Protection District.9

Southwick’s Flexible Residential Development table sets minimum lot areas of 40,000 square feet in R-40 FRD and 30,000 square feet in R-20 FRD, subject to table exceptions for estate and flag lots.10 In R-40 FRD, listed minimum yards are 40 feet front, 50 feet rear and 20 feet side, with a side-yard exception.11 These are flexible-development standards, not a townwide lot-size or setback answer.1011

How do septic permits and private wells work in the Town of Southwick?

Southwick’s Board of Health has primary responsibility for individual septic systems and private wells; contact that town office for a proposed system or the sanitary suitability of a parcel.3 Massachusetts applies statewide environmental-code minimum requirements to individual sewage disposal systems, with local health authorities administering septic permits within their authority.12 Southwick requires new and renewal health applications through its online permitting system.13

Before committing to a building layout, discuss the proposed well and septic locations with the Board of Health: Southwick’s building checklist calls for those locations on the plot plan when applicable.38 Massachusetts requires well-driller certification and allows towns to require a private-well site permit; ask Southwick’s Board of Health which local requirements apply.143

Can you live in an RV or tiny home in the Town of Southwick?

Southwick allows an owner to store a trailer in the rear yard of a lot the owner occupies as a permanent residence, but sleeping, living or cooking in a trailer requires Building Inspector authorization and a Board of Health permit.4 Southwick’s casualty-related trailer permits can last up to 24 months, with hardship extensions; that provision does not establish a general right to live in an RV while building on vacant land.4

We could not confirm a Southwick-specific tiny-home occupancy rule; take the proposed foundation, wheels and dwelling use to the Building Department and Board of Health.13 Massachusetts prohibits zoning restrictions on the interior area of a single-family residential building, while building-code requirements still apply.6 Southwick’s 500-square-foot minimum applies to apartment-house units in R-20-A under the cited special-permit provision, not every house in town.15

Building a home in the Town of Southwick: what should you do first?

Start by asking the Planning Board about the parcel’s zoning district, land division and any special-permit review relevant to the proposal.59 Next, discuss wastewater and private-water plans with Southwick’s Board of Health, and ask the Conservation Commission about proposed work in or near wetlands or resource areas.316

Prepare the building application using Southwick’s home-project checklist: scaled drawings must describe the proposed work, and the plot plan identifies the property, district, overlays, well and septic locations, curb cut and driveway.8 Submit the building application through PermitEyes and arrange inspections by calling the Building Department.1 We could not confirm the complete inspection sequence or general certificate-of-occupancy procedure; ask the Building Department to specify those requirements for your project.1

What should you check before buying land in the Town of Southwick?

Use Southwick’s parcel-specific zoning answer when evaluating land inside town; for land elsewhere, consult the Hampden County guide because municipal zoning rules differ across the county.217 Southwick’s Board of Health is the local contact for individual septic systems and private wells, and the Conservation Commission reviews work near wetlands and resource areas.316

If a small second dwelling is part of the purchase plan, Massachusetts protects a qualifying accessory dwelling in a single-family residential district, subject to reasonable regulations including septic, setbacks, bulk and height.7 That protected accessory use does not answer whether a standalone tiny home is allowed on an otherwise vacant lot.7 Ask the Building Department about current building fees, driveway approvals and floodplain zoning before pricing the project; we could not confirm a complete local checklist for those questions.1

Watch-outs

  • Southwick’s trailer storage allowance does not authorize sleeping or living in the trailer without Building Inspector authorization and a Board of Health permit.4
  • Southwick’s published Flexible Residential Development lot sizes and setbacks apply to those developments, not automatically to every residential parcel.1011
  • We could not confirm Southwick-specific composting-toilet or other off-grid sanitation approval; ask the Board of Health before choosing a system.3
  • Request Southwick building inspections by phone, rather than through the e-permitting chat system.1

Sources

  1. Town of Southwick Building Department (southwickma.gov)
  2. Chapter 185 Zoning (Town of Southwick), quoted and re-checked
  3. Town of Southwick Board of Health (southwickma.gov)
  4. ecode360.com (Town of Southwick), quoted and re-checked
  5. Article III Establishment of Districts (Town of Southwick), quoted and re-checked
  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. Town of Southwick home-project application checklist (southwickma.gov)
  9. Town of Southwick Planning Board (southwickma.gov)
  10. Table I Dimensional and Density Requirements Flexible Residential Developments (Town of Southwick), quoted and re-checked
  11. Table I Dimensional and Density Requirements Flexible Residential Developments (Town of Southwick), quoted and re-checked
  12. Massachusetts General Laws Chapter 111, Section 31E (Massachusetts statewide rule), quoted and re-checked
  13. Town of Southwick Board of Health online permitting (southwickma.gov)
  14. Massachusetts General Laws Chapter 21G, Section 20 (Massachusetts statewide rule), quoted and re-checked
  15. Article IV Use Regulations (Town of Southwick), quoted and re-checked
  16. Town of Southwick Conservation Commission (southwickma.gov)
  17. Massachusetts General Laws Chapter 40A, Section 1A, quoted and re-checked

Written October 12, 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 Southwick

Town of Southwick’s own rules

  • Local zoningPresent

    Southwick town adopts and administers its own zoning bylaw, Chapter 185 Zoning.

    • The code states that zoning districts and boundaries are established by the Town zoning bylaw and map.
    “HISTORY: Adopted by the Special Town Meeting 12-20-1950 by Art. I, as amended through STM 3-29-1977 by Art. 1. Subsequent amendments noted where applicable.”
  • Zoning districtsPublished

    Zoning districts and boundaries inside Southwick town.

    • The zoning map is incorporated by reference and is on file with the Town Clerk.
    • The code lists 13 districts, including AC, R-40, R-20, R-20-A, R-20-B, B, BR, I, IR, FH, Wellhead Protection, FRD, and Adult Entertainment.

    number of zoning districts: 13 districts

    “For the purpose of this Zoning Bylaw, the Town of Southwick is hereby divided into 13 zoning districts to be known as:”
  • Minimum dwelling sizeSpecified

    Residential apartment houses in the R-20-A district.

    • The R-20-A apartment-house use requires a special permit.
    • Each dwelling unit must contain at least 500 square feet of living space and at least two rooms exclusive of bathroom.
    • Each additional room requires 125 square feet of living area; no more than three bedrooms may be provided under the cited provision.

    minimum dwelling unit area: >= 500 square feet · minimum rooms exclusive of bathroom: >= 2 rooms · additional living area per additional room: per 125 square feet

    “Each dwelling unit shall contain at least 500 square feet of living space and at least two rooms exclusive of bathroom. For each additional room, 125 square feet of living area shall be provided. In no case shall more than three bedrooms be provided, and when provided this type of dwelling unit shall not comprise more than 5% of the dwelling units proposed.”
  • Minimum lot sizeSpecified

    Flexible Residential Development districts: R-40 FRD, R-20 FRD, R-20-A FRD, and R-20-B FRD.

    • The table is specifically for flexible residential developments.
    • The minimum lot areas are subject to the table notes, including exceptions for estate lots and flag lots.

    R-40 FRD minimum lot area: 40000 square feet (except for estate lots and flag lots) · R-20 FRD minimum lot area: 30000 square feet (except for estate lots and flag lots) · R-20-A FRD minimum lot area: 180000 square feet (except for estate lots and flag lots) · R-20-B FRD minimum lot area: 180000 square feet (except for estate lots and flag lots)

    “R-40 FRD 40,000 40 100 40 50 20 40 20 35 R-20 FRD 30,000 40 75 40 40 10 20 20 35 R-20-A FRD 180,000 40 150 40 40 35 50 20 35 R-20-B FRD 180,000 40 150 40 40 35 50 20 35”
  • SetbacksSpecified

    Flexible Residential Development districts identified in Table I.

    • Table I provides minimum front, rear, and side yards by FRD district.
    • The side-yard column is subject to the table's exception in § 185-23H(7).

    R-40 FRD yards: front 40; rear 50; side 20 feet (side-yard exception in § 185-23H(7)) · R-20 FRD yards: front 40; rear 40; side 10 feet (side-yard exception in § 185-23H(7)) · R-20-A FRD yards: front 40; rear 40; side 35 feet (side-yard exception in § 185-23H(7)) · R-20-B FRD yards: front 40; rear 40; side 35 feet (side-yard exception in § 185-23H(7))

    “Minimum Yards (feet) Zone Type Lot area1 (square feet) Minimum Common Open Space3 (percent) Minimum Frontage (feet) Front Rear Side2”
  • Lot coverageSpecified

    Flexible Residential Development districts identified in Table I.

    • Table I states maximum impervious-surface coverage of buildable land.

    maximum impervious surface coverage: <= 20 percent of buildable land

    “Maximum Impervious Surface Coverage of Buildable Land (percent)”
  • Living in an RVLimited

    Occupancy of trailers or recreational vehicles on land inside Southwick town.

    • A trailer may be stored by its owner in the rear yard of a lot occupied by the owner as a permanent residence.
    • Sleeping, living, cooking, or business use requires Building Inspector authorization and a Board of Health permit.
    • Casualty-related permits may last up to 24 months, with hardship extensions up to six months at a time.
    • Business trailers may receive successive permits up to 365 days subject to loading, parking, setback, hazardous-material, and zoning-use conditions.
    • Trailer parks or trailer camps of two or more are prohibited except under the commercial-recreation provision.

    casualty permit maximum: 24 months (hardship extensions may be up to six months at a time) · business trailer permit maximum: 365 days (subject to stated conditions)

    “A trailer, excluding mobile homes, may be stored by its owner in the rear yard of a lot occupied by him as his permanent residence, but no trailer may be occupied or used for sleeping, living, cooking or carrying on a business in any district in the Town of Southwick, unless authorized by the Building Inspector and a permit issued by the Board of Health.”

Still unanswered

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

  • Building permit — Building permits for construction inside Southwick town.
  • Owner-builder exemption — Owner-builder exemptions inside Southwick town.
  • Inspections — Building inspections inside Southwick town.
  • Certificate of occupancy — Certificates of occupancy for buildings inside Southwick town.
  • Tiny homes — Tiny-home occupancy inside Southwick town.
8 more unanswered
  • Manufactured homes
  • Accessory dwellings
  • Off-grid sanitation
  • Agricultural exemption
  • 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 Southwick publishes no rule on the point, not that none exists. Hampden County’s page lists the county offices to call.

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