Bolthole Index

Sagadahoc County, Maine

Building permits, zoning and septic in the Town of Topsham, Maine

The Town of Topsham, Maine requires building permits for work covered by its zoning chapter and enforces the Maine Uniform Building and Energy Code.12 Topsham administers its own zoning and wastewater codes; septic-system permits come from the municipal Local Plumbing Inspector under Maine rules.34

At a glance

Building permit
Required for work covered by the town ordinance1
Zoning
Administered by Topsham Code Enforcement3
Septic permit
Local Plumbing Inspector issues approval under Maine rules4
Tiny homes
State placement protection applies subject to land-use requirements5
Dwelling size
Town table states 500 square feet; confirm current treatment of ADUs67
Owner-builder
Contract exemption does not waive building approval8
Occupancy
Certificate from the Code Enforcement Officer required as the building code requires9

Who to call

Building permits

Topsham Code Enforcement Office

Building-code, zoning, plumbing and wastewater-code administration; questions about shoreland and floodplain ordinances.

(207) 729-0908

[email protected]

100 Main Street, Topsham, Maine 04086

Planning & zoning

Topsham Planning Office

Land-use information, development proposals and planning records.

(207) 725-1724

[email protected]

100 Main Street, Topsham, Maine 04086

Septic permits

Maine CDC Subsurface Wastewater Program

Statewide subsurface wastewater rules, forms and fee schedule; the relevant municipal Local Plumbing Inspector issues the permit

(207) 287-2070

[email protected]

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 Topsham 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 Topsham, ME?

Topsham requires a building permit, plumbing permit and/or certificate of occupancy for activities covered by its zoning chapter; repairs and normal maintenance may be exempt when they do not involve structural elements or physical modifications requiring approval.1 Topsham enforces MUBEC, and the Code Enforcement Officer conducts on-site compliance inspections.210 Topsham building-permit fees are set by the Board of Selectmen; ask Code Enforcement for the current charge for your project.113

Who issues building permits in the Town of Topsham?

Start with Topsham Code Enforcement for building-code, zoning and plumbing questions, and ask the office which application your proposed work requires.3 The town directs applicants to download application forms and submit them by email, mail or delivery to the office.3 Topsham Planning maintains land-use ordinances, reviews development proposals and provides land-use information to the public; bring the parcel and proposed use to Planning when you need development guidance.12

Does the Town of Topsham have zoning and minimum home sizes?

Topsham Code Enforcement administers the town zoning ordinance, so a county-level answer about zoning does not resolve a Topsham parcel’s development requirements.3 Ask Planning to identify the parcel’s district and the applicable lot-area, setback and use requirements before choosing a house footprint.12 Topsham’s dimensional table states a minimum of 500 square feet of living space for individual dwelling units, including accessory dwelling units.6 Maine’s ADU statute provides conditional permission and a different minimum-size framework; ask Code Enforcement how the town applies the current rules to your ADU.73

How do septic permits work inside the Town of Topsham?

For proposed Topsham construction without public sewer, submit a valid plumbing permit or completed plumbing-permit application with a site evaluation approved by the Plumbing Inspector.13 Maine’s Local Plumbing Inspector issues the disposal-system permit, while Maine CDC oversees the statewide framework.4 New, expanded and replacement systems generally need approval before work begins, with normal maintenance and repair excepted.14 The system must pass site-preparation and pre-backfill inspections; arrange inspection timing with the Local Plumbing Inspector through the town’s codes office.153

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

We could not confirm permission for residential RV occupancy on an individual Topsham lot; ask Code Enforcement about your intended stay and wastewater arrangement before buying an RV for on-site housing.3 Maine requires municipalities to permit a legally defined tiny home on an individual house lot where single-family dwellings are allowed, or as an accessory structure, subject to applicable land-use requirements.5 That protection does not eliminate building, safety, septic or shoreland requirements, so obtain a project-specific answer from Topsham before ordering a unit.53

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

  1. Ask Topsham Planning for the parcel’s land-use requirements and any development review needed for your proposal.12
  2. For a lot without public sewer, arrange the site evaluation and plumbing application required for proposed construction.13
  3. Submit the applicable building application to Code Enforcement and confirm the town’s fee.311
  4. Coordinate construction inspections with Code Enforcement and septic inspections with the Local Plumbing Inspector.1015
  5. Obtain the required certificate of occupancy before using the completed home.9

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

Ask Topsham Code Enforcement to check the parcel against the town’s shoreland and floodplain ordinances before settling on a building site.3 We could not confirm a general private-residential-well permit requirement in Topsham; ask the codes office which approvals apply to your proposed water supply.163 Maine’s home-construction-contract exemption does not waive building permits or inspections for owner-builders.8 For land outside Topsham, use the Sagadahoc County guide for the county context; building and land-use questions inside Topsham belong with the town offices above.312

Watch-outs

  • Confirm how Topsham applies its published dwelling-size minimum to an ADU before purchasing plans.67
  • Topsham’s codes page says the newly adopted 2021 I-codes and corresponding standards became enforceable on April 7, 2025; confirm the applicable code edition before submitting plans.3

Sources

  1. Article VI: Zone Regulations - Town of Topsham, ME (Town of Topsham), quoted and re-checked
  2. Chapter 91 Building Construction - Town of Topsham, ME (Town of Topsham), quoted and re-checked
  3. Topsham Code Enforcement Office (topshammaine.com)
  4. Subsurface Wastewater System Permitting, quoted and re-checked
  5. Title 30-A, §4363: Regulation of tiny homes (Maine statewide rule), quoted and re-checked
  6. Schedule A - Town of Topsham Table of Dimensional Requirements (Town of Topsham), quoted and re-checked
  7. Maine Revised Statutes Title 30-A, §4364-B: Accessory dwelling units (Maine statewide rule), quoted and re-checked
  8. Title 10, §1489: Exemption (Maine statewide rule), quoted and re-checked
  9. Article IX: Administration, Enforcement and Penalties - Town of Topsham, ME (Town of Topsham), quoted and re-checked
  10. Article IX: Administration, Enforcement and Penalties - Town of Topsham, ME (Town of Topsham), quoted and re-checked
  11. Chapter 91 Building Construction - Town of Topsham, ME (Town of Topsham), quoted and re-checked
  12. Topsham Planning Office (topshammaine.com)
  13. Article IX: Administration, Enforcement and Penalties - Town of Topsham, ME (Town of Topsham), quoted and re-checked
  14. Subsurface Wastewater System Permitting (Maine statewide rule), quoted and re-checked
  15. Maine CDC Subsurface Wastewater Program (maine.gov)
  16. Significant Groundwater Wells, and smaller wells (Maine statewide rule), 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 Topsham

Town of Topsham’s own rules

  • Building permitRequired

    Buildings, land uses, and sanitary facilities inside Topsham town.

    • The zoning chapter states permits are required according to the chapter.
    • Repairs, replacement, normal maintenance not requiring structural elements, and decorative changes may be exempt if they do not involve physical modifications requiring a permit.
    “A plumbing permit, building permit and/or certificate of occupancy shall be required”
  • Building code adoptedAdopted

    Building-code enforcement inside Topsham town.

    • MUBEC is required by Maine law and the Town states that previously adopted building code is superseded.
    “utilize, implement and enforce the Maine Uniform Building and Energy Code (MUBEC)”
  • InspectionsRequired

    Construction and land-use compliance inside Topsham town.

    • The Code Enforcement Officer conducts on-site inspections to ensure compliance with applicable laws and approval conditions.
    • Entry requires owner, occupant, or agent consent unless an administrative warrant is obtained.
    “The Code Enforcement Officer shall conduct on-site inspection to ensure compliance with all applicable laws and conditions attached to approval. The Code Enforcement Officer may enter any property at reasonable hours and enter any structure with the consent of the property owner, occupant or agent to inspect the property or structure for compliance with the law or ordinances set forth in this section. If consent is denied, he should obtain an administrative warrant before entering the property.”
  • Certificate of occupancyRequired

    Use or occupancy of lots and structures inside Topsham town.

    • Required in advance of use or occupancy of any lot, change of use, newly erected structure, or change in use of an existing structure, as the building code requires.
    • The lot, building, or structure must comply with the zoning chapter and other local and state laws.
    “A certificate of occupancy issued by the Code Enforcement Officer is required”
  • Minimum dwelling sizeSpecified

    Individual dwelling units in Topsham town, including accessory dwelling units.

    • The table footnote applies to individual dwelling units and accessory dwelling units.

    minimum living space: >= 500 square feet

    “Individual dwelling units shall have a minimum of 500 square feet of living space.”
  • Septic permitRequired

    Proposed construction on property inside Topsham town that is not served by public sewer.

    • A valid plumbing permit or completed plumbing-permit application must be submitted.
    • The application must include a site evaluation approved by the Plumbing Inspector.
    “a valid plumbing permit or a completed application for a plumbing permit”
  • Permit feesVariable (with conditions)

    Town building-permit fees inside Topsham town.

    • Fees are established by the Topsham Board of Selectmen under Chapter 109.
    • Permit-fee computations are rounded to the nearest dollar.
    • Municipal property, including schools, is exempt from permit fees.
    “All fees shall be as established by the Topsham Board of Selectmen”

Still unanswered

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

  • Owner-builder exemption — Owner-builders performing construction inside Topsham town.
  • Tiny homes — Tiny-home occupancy inside Topsham town.
  • Accessory dwellings — Accessory-dwelling occupancy inside Topsham town.
  • Who permits septic — Septic administration inside Topsham town.
  • Septic inspection — Septic-system inspection inside Topsham town.
4 more unanswered
  • Well permit
  • Agricultural exemption
  • Building in a floodplain
  • Short-term rentals

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

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