Bolthole Index

Barnstable County, Massachusetts

Building permits, zoning and septic in Town of Harwich, Massachusetts

Town of Harwich, Massachusetts building permits are handled locally, with applications submitted online to the Building Department.1 Harwich has its own zoning, while the Town Health Department handles septic permitting and inspections under Title 5.23 For land elsewhere in Barnstable County, use the Barnstable County guide; zoning is set town by town.4

At a glance

Building permits
Town Building Department; online applications1
Zoning
Town zoning applies; dimensions depend on district256
Septic
Town Health Department handles permitting and inspections under Title 53
Minimum home size
Residential net floor area is district-specific7
Driveway access
Access along legal frontage; alternate access needs a Planning Board special permit8
Floodplain
Development permit required in the Floodplain Overlay District9
Owner-builder
State homeowner registration exemption does not waive building permits10

Who to call

Building permits

Harwich Building Department

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

508-430-7506

[email protected]

Online permits →

Planning & zoning

Harwich Planning Department

Town zoning and Planning Board rules; alternate-access special-permit questions

Septic permits

Harwich Health Department

Local septic permitting and inspections; ask about wells and proposed sanitation

508-430-7509

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

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

Harwich routes building-permit applications through the Town Building Department, and all building-permit applications must be submitted online; paper building-permit applications are not accepted.1 Massachusetts local inspectors enforce the state building code within their own city or town.11 Before designing a new home, ask the Building Department to identify the application documents, inspections and occupancy approval needed for your project.1 A homeowner’s Massachusetts registration exemption does not establish an exemption from building permits, inspections or certificates of occupancy.10

Who is the Town of Harwich building department, and where do you apply?

Contact the Harwich Building Department at 508-430-7506 or [email protected] for building-permit application assistance.1 Use the town’s online application portal to submit a building-permit application.1 Harwich allows plumbing, gas and electrical permit applications to be submitted on paper, so the building application process should not be assumed to cover every trade application.1 The Harwich Planning Department oversees the town’s zoning by-laws and Planning Board rules; direct district and Planning Board application questions there.12

Does Town of Harwich have zoning, lot-size and setback rules?

Harwich has a municipal zoning chapter, and residential lot area, frontage, yard dimensions and minimum residential net floor area depend on the applicable district tables.257 Ask Planning to identify the parcel’s district and the applicable area, height and bulk tables before choosing a house plan.12 Harwich corner-lot structures must meet the district’s front-yard setback from every street.6 In Drinking Water Resource Protection Districts, the underlying district’s dimensional regulations apply.5 Harwich also limits single-family residences to 2 levels for human occupation, with a basement/cellar exception and building-code conditions for sleeping rooms.13

How do septic permits and wells work inside Town of Harwich?

The Harwich Health Department lists permitting and inspection of septic systems for compliance with Title 5 among its activities; start with Town Health for a septic proposal rather than the county building counter.3 Contact Town Health at 508-430-7509 to discuss the proposed sewage-disposal system and ask which application and site information are needed.3 Massachusetts permits towns to require a private-well site permit, but we could not confirm Harwich’s operative well-permit requirements; ask Town Health before commissioning drilling.143 We could not confirm a Harwich rule allowing off-grid sanitation; discuss the proposed system with Town Health.3

Can you live in an RV, tiny home or accessory dwelling in Town of Harwich?

We could not confirm permission to occupy an RV or camp on private land in Harwich; ask the Building Department about your intended location, duration and use before relying on that arrangement during construction.1 Harwich’s minimum residential net floor area is district-specific, so we could not confirm that a standalone tiny home qualifies on a particular lot.7 Massachusetts protects qualifying accessory dwelling units in single-family residential zoning districts, subject to reasonable regulations including setbacks and applicable sanitation requirements.15 A qualifying accessory unit must be on the same lot as a principal dwelling and no larger than half the principal dwelling’s gross floor area or 900 square feet, whichever is smaller.15

Building a home in Town of Harwich: what are the steps, in order?

  1. Ask Harwich Planning to identify the parcel’s zoning district and applicable dimensional tables before finalizing a building footprint.1256
  2. Check legal frontage and the proposed driveway: Harwich requires access along the required legal frontage, and alternate access across an adjacent property needs a Planning Board special permit.8
  3. Ask Town Health to review the septic proposal and identify the required application and inspection process.3
  4. Ask Building about the Floodplain Overlay District: Harwich requires a permit for construction and other development there, including grading, filling and sheds.9
  5. Submit the building-permit application online and ask Building to confirm inspections and occupancy requirements for the project.1

For a subdivision, Harwich requires necessary permits and approvals before site preparation; the rule allows preliminary surveys and required tests.16

Watch-outs

  • An easement is not enough by itself for alternate driveway access in Harwich: a Planning Board special permit is required.8
  • Harwich’s floodplain development-permit requirement includes manufactured homes, agricultural facilities, fences, sheds, filling and grading.9
  • We could not confirm Harwich residential building-permit fees or RV occupancy permission; ask the Building Department before budgeting or arranging temporary housing.1

Sources

  1. Harwich Building Department (harwich-ma.gov)
  2. Chapter 325: Zoning - Town of Harwich, MA (Town of Harwich), quoted and re-checked
  3. Harwich Health Department (harwich-ma.gov)
  4. Cape Cod Commission - Frequently Asked Questions (2026 county census)
  5. Article VI: Area, Height and Bulk Regulations - Town of Harwich, MA (Town of Harwich), quoted and re-checked
  6. Article VI: Area, Height and Bulk Regulations - Town of Harwich, MA (Town of Harwich), quoted and re-checked
  7. Article VI: Area, Height and Bulk Regulations - Town of Harwich, MA (Town of Harwich), quoted and re-checked
  8. Article VI: Area, Height and Bulk Regulations - Town of Harwich, MA (Town of Harwich), quoted and re-checked
  9. Article XVII: Floodplain Regulations - Town of Harwich, MA (Town of Harwich), quoted and re-checked
  10. Massachusetts General Laws, Chapter 142A, Section 14 (Massachusetts statewide rule), quoted and re-checked
  11. Massachusetts General Laws, Chapter 143, Section 3A: Enforcement of state building code (Massachusetts statewide rule), quoted and re-checked
  12. Harwich Planning Department (harwich-ma.gov)
  13. Article VI: Area, Height and Bulk Regulations - Town of Harwich, MA (Town of Harwich), quoted and re-checked
  14. Massachusetts General Laws Chapter 21G, Section 20 (Massachusetts statewide rule), quoted and re-checked
  15. General Law - Part I, Title VII, Chapter 40A, Section 3 (Massachusetts statewide rule), quoted and re-checked
  16. Article VI: Area, Height and Bulk Regulations - Town of Harwich, MA (Town of Harwich), 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 Harwich

Town of Harwich’s own rules

  • Local zoningPresent (with conditions)

    Land inside Harwich town limits.

    • The Chapter 325 history states it was adopted at the May 5, 2009 Special Town Meeting; amendments are noted where applicable.
    “Chapter 325 Zoning [HISTORY: Adopted by the Special Town Meeting of the Town of Harwich 5-5-2009 STM by Art. 2. Amendments noted where applicable.]”
  • Minimum dwelling sizeDistrict specific (with conditions)

    Residential development in each applicable Harwich zoning district.

    • The applicable values are set in the Table of Area Regulations and Table of Height and Bulk Regulations.
    • In Drinking Water Resource Protection Districts, the underlying zoning district regulations apply.
    “The regulations for each district pertaining to minimum lot area, minimum lot frontage, maximum front yard depth, minimum side yard width, minimum rear yard depth, and minimum residential net floor area shall be as specified in this article and set forth in the Table of Area Regulations and Table of Height and Bulk Regulations and subject to the further provisions of this article.”
  • Minimum lot sizeDistrict specific (with conditions)

    Residential development in each applicable Harwich zoning district.

    • The applicable values are set in the Table of Area Regulations and Table of Height and Bulk Regulations.
    • In Drinking Water Resource Protection Districts, the underlying zoning district regulations apply.
    “The regulations for each district pertaining to minimum lot area, minimum lot frontage, maximum front yard depth, minimum side yard width, minimum rear yard depth, and minimum residential net floor area shall be as specified in this article and set forth in the Table of Area Regulations and Table of Height and Bulk Regulations and subject to the further provisions of this article.”
  • SetbacksDistrict specific (with conditions)

    Structures in each applicable Harwich zoning district.

    • Applicable front, side, and rear yard dimensions are in the incorporated area and bulk tables.
    • Corner-lot structures must be set back from all streets by the front-yard setback applicable in their district.
    “Any structure located on a corner lot shall be set back from all streets a distance equal to the front yard setback requirement in the district.”
  • Lot coverageSpecified

    Lots used for hotel or motel purposes inside Harwich town limits.

    • Golf courses, putting greens, bowling greens, and similar amenities not involving impervious ground cover are excluded from the project ground-coverage computation.

    coverage by parking lots, roads, streets, tennis courts, swimming pools, and like amenities: <= 15 percent of lot area (Applies to lots used for hotel or motel purposes.)

    “On a lot used for hotel or motel purposes, parking lots, roads, streets, tennis courts, swimming pools and like amenities and facilities shall not cover more than 15% of the area of the lot. For the purpose of this subsection, golf courses, putting greens, bowling greens and similar amenities which do not involve covering the ground with any impervious material shall not be included for the purpose of computing the total ground coverage of a project.”
  • Building heightDistrict specific (with conditions)

    Buildings in each applicable Harwich zoning district.

    • Maximum heights are contained in Table 3, Height and Bulk Regulations.
    • A single-family residence may not contain more than two levels for human occupation, subject to the stated basement/cellar exception.

    single-family human-occupation levels: <= 2 levels (A basement or cellar may be a family or recreational room but cannot be sleeping quarters unless it complies with Building Code room-design and construction provisions.)

    “In no case shall a single-family residence contain more than two levels for human occupation, provided that the basement or cellar of a single-family residence can be used as a family room or recreational room but shall not be used as sleeping quarters unless it is made to comply with the provisions of the Building Code regulating the design and construction of such rooms.”
  • Subdividing landRegulated (with conditions)

    Subdivision development inside Harwich town limits.

    • Necessary permits and approvals must be obtained before site-preparation work in connection with a subdivision.
    • The rule does not prohibit land surveys or tests required before a permit or approval is issued.
    “There shall be no site preparation work done in connection with development of any use of land other than single-family or single-family with accessory apartment use and no such work in connection with development of any subdivision until all necessary permits and approvals have been obtained.”
  • Driveway accessLimited

    Lots with required legal frontage inside Harwich town limits.

    • Access must be taken along the required legal frontage.
    • Alternate access from another street, road, way, or an easement across adjacent property needs a Planning Board special permit.
    • For alternate access, the proposal must be superior to frontage access, cleared to at least 16 feet in width and 16 feet in height, and an easement-providing lot must retain required legal frontage.

    alternate-access clearing width: >= 16 feet (Finding required for Planning Board special permit.) · alternate-access clearing height: >= 16 feet (Finding required for Planning Board special permit.)

    “A lot with the required legal frontage must take access along the required legal frontage. No alternate access may be granted from other streets, roads, or ways, nor should access be taken from an easement across an adjacent property without the issuance of a special permit from the Planning Board.”
  • Building in a floodplainRequired

    Proposed construction or other development in Harwich's Floodplain Overlay District.

    • The requirement includes new construction, changes to existing buildings, manufactured homes, agricultural facilities, fences, sheds, storage facilities, filling, grading, drilling, mining, paving, and other development that may increase flooding or adversely affect other properties' flood risks.
    “The Town of Harwich requires a permit for all proposed construction or other development in the Floodplain Overlay District, including new construction or changes to existing buildings, placement of manufactured homes, placement of agricultural facilities, fences, sheds, storage facilities or filling, grading, drilling, mining, paving and any other development that might increase flooding or adversely impact flood risks to other properties.”

Still unanswered

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

  • Building permit — New residential construction inside Harwich town limits.
  • Owner-builder exemption — Owner-built residential work inside Harwich town limits.
  • Building code adopted — Construction inside Harwich town limits.
  • Inspections — Residential construction inside Harwich town limits.
  • Certificate of occupancy — Residential occupancy inside Harwich town limits.
11 more unanswered
  • Camping on your land
  • Tiny homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Agricultural exemption
  • Short-term rentals
  • Permit fees

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

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