Bolthole Index

Middlesex County, Massachusetts

Building permits, zoning and land rules in Medford, Massachusetts

Medford, Massachusetts requires building permits for construction and other regulated work; work cannot begin until the building permit card is issued.1 Medford’s Building Department handles building permits and written zoning inquiries, while the city Health Department lists private sewage disposal and wells among its inspectional services.23 For land outside Medford, use the Middlesex County guide to orient your search for the applicable municipal rules.4

At a glance

Building permits
Required for construction and regulated work, with limited exemptions1
Zoning
City ordinance; submit legal zoning and proposed-use inquiries in writing to the Building Commissioner25
Homeowner building permit
Resident owner of a single- or two-family dwelling; licensed electrical, plumbing and gas work still required6
Septic and wells
City Health Department inspectional services; confirm the project-specific requirements3
Building application
Online submission; major projects need multiple departmental sign-offs7
Accessory dwelling unit
State protection in single-family residential districts, subject to building, sanitary and dimensional requirements8

Who to call

Building permits

Medford Building Department

Building applications, inspections and written zoning inquiries for Medford.

(781)-393-2509

85 George P. Hassett Drive

Online permits →

Zoning

Medford Building Department — zoning and development review

City zoning information and the development approval process.

Health department

Medford Health Department — Inspectional Services & Environmental Health

Environmental health inquiries about private sewage disposal and wells in Medford.

(781) 475-5648

[email protected]

85 George P. Hassett Drive

Contact details are copied from each office’s official page and were checked against it on October 11, 2026.

Off-grid gear

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

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Do you need a building permit in Medford, MA?

Medford requires a building permit for construction, reconstruction, alteration, repair, removal, demolition, changes in use or occupancy, and regulated equipment.1 Medford’s Building Department enforces the Massachusetts State Building Code and related plumbing, gas and electrical codes.9

The limited building-permit exemptions include one-story detached tool or storage sheds, playhouses and similar accessory buildings no larger than 200 square feet, plus qualifying ordinary repairs.1 Medford’s exemption for retaining walls applies only to walls retaining less than 4 feet of unbalanced fill that the building official determines pose no threat to safety, health or welfare.1 Ask the Building Department to classify the proposed work before relying on an exemption; Medford prohibits starting work until the required building permit card is issued.2

Who issues building permits in Medford, and can an owner apply?

Contact the Medford Building Department for building applications and inspections, and use the city’s online application process.7 A Medford homeowner’s building permit is available only to the owner of a single- or two-family dwelling who resides in the structure where the work is performed.6 A person constructing more than one home in a two-year period does not qualify as a homeowner under the city’s stated conditions.6

A homeowner’s building permit does not authorize unlicensed electrical, plumbing or gas work: Medford requires licensed persons for those trades under state law.6 For a new home or major project, plan for departmental sign-offs rather than treating online submission as permission to start construction.7

Does Medford have zoning, and how do you check lot requirements?

Medford’s Zoning Ordinance governs building dimensions and allowed business activities within the city.5 Submit questions about an existing building’s legal zoning status or a proposed future use in writing to the Medford Building Commissioner.2 Ask that office for the parcel’s district and applicable dimensional requirements before choosing a house footprint or assuming a lot can be divided.2

Medford’s Community Development Board administers the Subdivision Control Law and performs the planning-board functions described by the city.10 For major development, the Building Department determines whether the City Council, Board of Appeals or Community Development Board conducts site plan review.7 Keep the land-division question and the building-application question together: Medford assigns subdivision administration to the Community Development Board, while major building projects require multiple departmental sign-offs.107

How do septic, sewer and private wells work inside Medford?

The Medford Health Department lists private sewage disposal, sewage treatment under Massachusetts Title 5 regulations, and wells among its inspectional services.3 The department also publishes links to Well Permit Regulations and a Well Permit Application.3 We could not confirm Medford’s exact septic-permit requirement or private-well exceptions; ask the city Health Department what approvals the proposed system needs.3

Massachusetts requires certification for people engaged in the business of digging or drilling wells, and permits cities and towns to require a local site permit.11 Where a town has provided both a drain and a sewer in a public way, state law requires sewage connection as directed by the responsible sewer authority.12 That conditional sewer rule does not establish an off-grid sanitation option for a Medford parcel without sewer access; ask the Health Department before choosing a sanitation system.123

Can you live in an RV or tiny home on land in Medford?

We could not confirm a Medford rule authorizing private-land RV occupancy, temporary camping, or tiny-home occupancy; submit the intended use in writing to the Medford Building Commissioner before buying a vehicle or small dwelling for that purpose.2 Massachusetts’ tiny-house provision for designated seasonal communities requires local authorization and building-code compliance; that conditional provision does not establish permission for a Medford project.13

For a small additional dwelling on an existing residential lot, Massachusetts protects a single accessory dwelling unit in a single-family residential zoning district, subject to applicable building, sanitary and dimensional requirements.8 The statutory size limit is the smaller of half the principal dwelling’s gross floor area or 900 square feet, and the unit needs a separate entrance and sleeping, cooking and sanitary facilities.8 Ask the Building Commissioner to evaluate the proposed Medford use and dimensions together.2

Building a home in Medford: what are the steps, in order?

  1. Submit the proposed use and zoning-status questions in writing to the Medford Building Commissioner before settling the design.2
  2. For a proposed land division, bring the subdivision question to Medford’s Community Development Board.10
  3. Ask the Medford Health Department about private sewage disposal and well requirements if either system is part of the project.3
  4. Submit the building application online; Medford reviews new buildings and major projects at weekly development meetings and requires several departmental sign-offs before issuing a building permit.7
  5. Allow for the building official’s stated 30-day review-and-action period, and wait for the building permit card before beginning work.71

Site plan review may be conducted by the City Council, Board of Appeals or Community Development Board, as determined by the Building Department, so ask which review route applies to the proposed home.7

Watch-outs

  • A Medford homeowner’s building permit does not remove the licensed-person requirements for electrical, plumbing and gas work.6
  • We could not confirm Medford’s private-land RV or tiny-home occupancy rules; submit the proposed use to the Building Commissioner in writing.2
  • We could not confirm Medford’s exact septic-permit requirement; ask the city Health Department before committing to a private sewage disposal system.3

Sources

  1. Building Department - City of Medford (Medford), quoted and re-checked
  2. Medford Building Department (medfordma.org)
  3. Medford Health Department — Inspectional Services & Environmental Health (medfordma.org)
  4. General Law - Chapter 40A, Section 5, quoted and re-checked
  5. Medford Building Department — zoning and development review (medfordma.org)
  6. Building Department FAQ's (Medford), quoted and re-checked
  7. Permits and Licensing - City of Medford (Medford), quoted and re-checked
  8. Massachusetts General Laws Chapter 40A, Section 3 (Massachusetts statewide rule), quoted and re-checked
  9. Building Department - City of Medford (Medford), quoted and re-checked
  10. Community Development Board - City of Medford (Medford), quoted and re-checked
  11. Massachusetts General Laws Chapter 21G, Section 20 (Massachusetts statewide rule), quoted and re-checked
  12. Massachusetts General Laws Chapter 83, Section 5 (Massachusetts statewide rule), quoted and re-checked
  13. Massachusetts General Laws Chapter 23B, Section 32 (Massachusetts statewide rule), quoted and re-checked

Written October 11, 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 Medford

Medford’s own rules

  • Owner-builder exemptionConditional

    Owner-performed building work inside Medford city limits.

    • Only the owner of a single- or two-family dwelling may obtain a homeowner’s permit.
    • The owner must reside in the structure where work is performed.
    • A person who constructs more than one home in a two-year period is not considered a homeowner.
    • Electrical, plumbing, and gas work still requires licensed persons under state law.

    home construction frequency disqualifying homeowner status: > 1 home per two years

    “Only the owner of a single or two family dwelling may obtain a homeowner’s permit, and he/she must reside in the structure where the work is being performed.”
  • Subdividing landRegulated (with conditions)

    Subdivision applications and Approval Not Required plans inside Medford city limits.

    • The Community Development Board performs the planning-board functions described on the official city page.
    “The Board’s responsibilities include administration of the Subdivision Control Law”
  • Permit processPublished (with conditions)

    Building and major development permit process inside Medford city limits.

    • Building applications must be submitted online.
    • New buildings and major projects are reviewed at weekly development meetings and require sign-offs from several departments.
    • Site plan review is conducted by the City Council, Board of Appeals, or Community Development Board as determined by the Building Department.
    • The building official has 30 days to review and act on an application.

    building permit application review period: 30 days (The page states this as the building official's review/action period.)

    “These projects require sign-off from several departments before a building permit is issued.”

Rules another office applies inside Medford

Medford does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

  • Building permitRequired

    Construction, reconstruction, alteration, repair, removal, demolition, use or occupancy changes, and regulated equipment inside Medford city limits.

    • Exemptions include one-story detached accessory buildings of no more than 200 square feet, qualifying retaining walls retaining less than four feet of unbalanced fill, and ordinary repairs that do not affect listed structural, safety, utility, or code systems.

    detached accessory building exemption floor area: <= 200 square feet (One-story tool/storage sheds, playhouses, and similar uses.) · retaining wall exemption retained unbalanced fill: < 4 feet (Only where the building official determines it is not a threat to public safety, health, or welfare.)

    “No work on any project may commence until a building permit card is issued to the applicant.”
  • Building code adoptedAdopted

    State Building Code requirements enforced inside Medford city limits.

    • The Medford Building Department enforces the State Building Code and related state plumbing, gas, and electrical codes.
    “enforcement of the State Building Code, plumbing, gas, electrical codes, and all pertinent regulations of the Commonwealth of Massachusetts.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Medford or Middlesex County directly.

  • Minimum dwelling size — Dwelling units inside Medford city limits.
  • Living in an RV — Occupancy of recreational vehicles on private land inside Medford city limits.
  • Camping on your land — Temporary camping on private land inside Medford city limits.
  • Tiny homes — Tiny-home occupancy inside Medford city limits.
  • Manufactured homes — Manufactured-home occupancy inside Medford city limits.
6 more unanswered
  • Septic permit
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Driveway access
  • Building in a floodplain

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

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