Bolthole Index

Barnstable County, Massachusetts

Building permits, zoning and septic rules in the Town of Chatham, MA

The Town of Chatham, Massachusetts requires building permits through its Building Division and administers its own Protective Zoning Bylaw.123 In Barnstable County’s Town of Chatham, septic permitting belongs to the town Health Division and Board of Health, and sewer or septic approval must precede a building permit unless the Board finds an existing system adequate for an alteration or addition.45

At a glance

Building permits
Required; apply through the town Building Division12
Zoning
Town Protective Zoning Bylaw applies3
Septic permits
Town Health Division and Board of Health; approval before building permits45
RV living
Floodplain placement is conditional; townwide occupancy is unconfirmed6
Owner-builder
Homeowner exemption paperwork available; building permits still required78
Off-grid sanitation
Non-sewer disposal cannot be approved where an adjoining sewer is accessible and entry permission is obtainable9

Who to call

Building permits

Town of Chatham Building Division

Building permit applications and construction-code questions; ask about floodplain review

508-945-5168

261 George Ryder Road Chatham, MA 02633

Online permits →

Planning & zoning

Town of Chatham Planning Division

Planning and subdivision questions; start here for parcel-specific zoning guidance

508-945-5168

261 George Ryder Road Chatham, MA 02633

Septic permits

Town of Chatham Health Division

Local septic permitting and inspection under town and state health rules

508-945-5165

261 George Ryder Road Chatham, MA 02633

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

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

The Town of Chatham requires residential building permits, and local inspectors enforce the Massachusetts State Building Code within the town.110 Chatham’s Building Division makes building, plumbing, gas and electrical permit applications available online.2 A qualifying homeowner can submit Chatham’s Homeowner Exemption Certificate and Affidavit, but the homeowner exemption does not remove the building-permit requirement.78 Ask the Building Division which application and exemption documents fit your proposed work before submitting a homeowner application.211

Who handles building permit applications in the Town of Chatham?

Start with the Town of Chatham Building Division at 508-945-5168, at 261 George Ryder Road, Chatham, MA 02633.2 Chatham allows building permit applications to be completed by the owner or a licensed professional; incomplete or inaccurate applications can increase processing time.11 The Building Division publishes a fee schedule identified as effective October 1, 2025, with fees varying by permit type and inspection.12 Use the town’s building application page and checklist to prepare the submission, and ask the Building Division for the fee applicable to your project.1112

Does the Town of Chatham have zoning and minimum home-size rules?

The Town of Chatham adopts and administers a Protective Zoning Bylaw; Massachusetts zoning districts and maps are locally adopted rather than supplied by a single statewide zoning map.313 Ask Chatham’s Planning Division to identify the parcel’s district and the applicable lot-area, frontage and setback provisions before settling on a house layout.143 We could not confirm Chatham-specific minimum dwelling floor area or general tiny-home occupancy authorization; ask the Planning Division and Building Division about the proposed dwelling.3142 Massachusetts law prohibits zoning minimum interior floor-area requirements for single-family residential buildings, but that protection does not eliminate state building-code requirements.15

How do septic permits work inside the Town of Chatham?

Chatham’s Health Division and Board of Health handle septic permitting and inspection under state and town rules.4 A Sewer Entrance Permit or Disposal System Construction Permit must precede building, foundation, special or plumbing permits unless the Board of Health or its agent finds the existing system adequate for a proposed alteration or addition.5 Chatham does not approve non-sewer sewage disposal where an adjoining common sanitary sewer is accessible and permission to enter it can be obtained.9 Discuss sewer access and any existing septic system with the Health Division before paying for a new onsite design.95

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

Chatham’s verified RV placement rule applies to floodplain zones A, AH, AE, VE and V: an RV must be elevated and anchored under the applicable zone rules, remain onsite for less than 180 consecutive days, or be fully licensed and highway ready.6 That floodplain rule does not establish townwide permission to occupy an RV on private land.6 We could not confirm general temporary camping, tiny-home occupancy or manufactured-home occupancy in Chatham; ask the Planning Division and Building Division about the exact parcel and proposed use.142 Massachusetts’ seasonal-community tiny-house pathway depends on municipal adoption and compliance with state and local building codes, so it is not automatic permission for a Chatham tiny house.16

Building a home in the Town of Chatham: what are the steps?

  1. Ask Chatham’s Planning Division to identify the zoning district and review the intended residential use.314
  2. Resolve sewer access or obtain the required sewage-disposal approval with the Health Division before the building permit.59
  3. Show existing and proposed driveway locations on the site plan when relocating a driveway; the town checklist calls for a Highway Department curb-cut permit on a town road and no curb-cut permit on a private road.17
  4. Submit a complete building permit application as the owner or through a licensed professional, including homeowner-exemption paperwork when applicable.117
  5. Ask the Building Division to confirm the inspections and occupancy documentation for your project; we could not confirm a general Chatham certificate-of-occupancy requirement.2

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

For a Chatham parcel, start with the town’s zoning, sewage-disposal approval and road-access requirements rather than assuming a buildable layout from acreage alone.3517 Massachusetts requires certification for commercial well diggers and drillers and allows municipalities to require private-well site permits; ask Chatham’s Health Division what local approval applies before arranging a well.1819 If your search extends beyond Chatham, use the Barnstable County guide for county context, then identify the municipal offices for the parcel: Massachusetts building-code enforcement rests with local city or town inspectors.10

Watch-outs

  • Chatham sewer or septic approval comes before the building permit, subject to the existing-system adequacy exception for alterations or additions.5
  • Chatham’s floodplain RV placement alternatives do not establish permission for townwide RV occupancy.6
  • Chatham short-term rentals require annual Building Department inspection; this is a rental-specific requirement.20

Sources

  1. Mass.gov - Massachusetts State Building Code (780 CMR) (2026 county census)
  2. Town of Chatham Building Division (chatham-ma.gov)
  3. Protective Zoning Bylaw 2025 (Town of Chatham), quoted and re-checked
  4. Health Division (Town of Chatham), quoted and re-checked
  5. Subsurface Disposal Regulations (Town of Chatham), quoted and re-checked
  6. chatham-ma.gov (Town of Chatham), quoted and re-checked
  7. Building Permit Application Checklist (Town of Chatham), quoted and re-checked
  8. Mass.gov - When is a Construction Supervisor License required? (2026 county census)
  9. Subsurface Disposal Regulations (Town of Chatham), quoted and re-checked
  10. Massachusetts General Laws, Chapter 143, Section 3A: Enforcement of state building code (Massachusetts statewide rule), quoted and re-checked
  11. Building Permit Applications (Town of Chatham), quoted and re-checked
  12. Building Division (Town of Chatham), quoted and re-checked
  13. General Law, Chapter 40A, Section 4 (Massachusetts statewide rule), quoted and re-checked
  14. Town of Chatham Planning Division (chatham-ma.gov)
  15. General Law - Chapter 40A, Section 3 (Massachusetts statewide rule), quoted and re-checked
  16. Massachusetts General Laws Chapter 23B, Section 32 (Massachusetts statewide rule), quoted and re-checked
  17. Building Permit Application Checklist (Town of Chatham), quoted and re-checked
  18. Massachusetts General Laws Chapter 21G, Section 20 (Massachusetts statewide rule), quoted and re-checked
  19. Town of Chatham Health Division (chatham-ma.gov)
  20. Building Division (Town of Chatham), 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 Chatham

Town of Chatham’s own rules

  • Owner-builder exemptionAvailable (with conditions)

    Residential construction permit applications inside Chatham town where the homeowner qualifies for the Massachusetts homeowner exemption.

    • The exemption is evidenced through a Homeowner Exemption Certificate and Affidavit; eligibility details were not fully extracted from the cited checklist.
    “Homeowner’s Exemption Certificate and Affidavit filled out and signed by Homeowner.”
  • InspectionsLimited

    Short-term rentals inside Chatham town.

    • The cited requirement is annual inspection for short-term rentals; the source does not establish inspection requirements for every type of construction.

    frequency: annual (short-term rentals)

    “requires short-term rentals to be inspected by the Building Department on an annual basis.”
  • Local zoningPresent

    Land inside Chatham town; the Town adopts and administers a Protective Zoning Bylaw.

    “This Zoning Bylaw is adopted pursuant to Chapter 40A, 40B and 41”
  • Living in an RVLimited

    Recreational vehicles placed on sites in Chatham floodplain zones A, AH, AE, VE, and V.

    • The vehicle must be elevated and anchored according to applicable zone regulations, or remain on site for less than 180 consecutive days, or be fully licensed and highway ready.
    • The cited rule is floodplain-specific and does not establish a townwide RV-occupancy rule.

    maximum unlicensed/unanchored duration: < 180 consecutive days (unless elevated and anchored or fully licensed and highway ready)

    “all recreational vehicles to be placed on a site must be elevated and anchored”
  • Who permits septicLocal

    Septic permitting and inspection inside Chatham town are handled by the Chatham Health Division and Board of Health under state and town rules.

    • The town enforces Massachusetts General Laws, State Environmental and Sanitary Codes, and Town of Chatham Bylaws and Regulations.
    “Permitting and inspection of septic systems”
  • Septic permitRequired

    New construction and applicable alterations inside Chatham town served by onsite sewage disposal.

    • A Sewer Entrance Permit or Disposal System Construction Permit must precede building, foundation, special, or plumbing permits unless the Board of Health or its agent determines the existing system is adequate for an alteration or addition.
    • A construction-permit fee may be charged at application or renewal.
    “No building permit, foundation permit, or special permit, or plumbing permit shall be issued until a Sewer Entrance Permit or Disposal System Construction Permit has first been obtained, unless the Board of Health or their Agent determines that the existing on-site subsurface sewage disposal system is adequate for a proposed alteration or addition to the existing dwelling. 2.6 FEES - A fee for the issuance of a construction permit may be charged by the Board of Health at the time an application is made for the permit or permit renewal.”
  • Off-grid sanitationLimited

    Onsite or other non-sewer sewage disposal inside Chatham town.

    • Non-sewer disposal is not approved where an accessible common sanitary sewer exists and permission to enter it can be obtained.
    • Where onsite disposal is pursued, town permitting and Title 5 requirements apply.
    “shall not be approved where a common sanitary sewer is accessible adjoining the property”
  • Driveway accessRequired

    New construction inside Chatham town involving a driveway or driveway relocation.

    • The site plan must show the existing and proposed driveway if the driveway is being relocated.
    • A curb-cut permit is required for a town road; a state-road curb cut is issued by MassDPW; no curb cut is required for a private road.
    “Town Road – Issued by Highway Dept [...] Private Road – No curb cut required”
  • Permit feesPublished

    Building permits and related permits inside Chatham town.

    • The Building Division page publishes a fee schedule identified as effective October 1, 2025; individual fees vary by permit type and inspection.

    fee schedule effective date: 2025-10-01

    “Building Division Fee Schedule_Effective 10.01.2025”
  • Permit processPublished (with conditions)

    Building permit applications inside Chatham town.

    • Applications may be completed by the owner or licensed professional.
    • Applications must be thorough and accurate; incompleteness may increase processing time.
    • The town provides online permit applications and checklists.
    “Applications should be completed by owner or his/her licensed professional.”

Still unanswered

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

  • Certificate of occupancy — Certificates of occupancy for land inside Chatham town.
  • Minimum dwelling size — Single-family dwellings inside Chatham town.
  • Camping on your land — Temporary camping on private land inside Chatham town.
  • Tiny homes — Tiny-home occupancy inside Chatham town.
  • Manufactured homes — Manufactured-home occupancy inside Chatham town.
1 more unanswered
  • Agricultural exemption

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 Chatham publishes no rule on the point, not that none exists. Barnstable County’s page lists the county offices to call.

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