Bolthole Index

Kennebec County, Maine

Zoning, building permits and septic rules in Augusta, Maine

Inside Augusta city limits, the city's Code Enforcement bureau issues building, plumbing and septic permits1. Augusta also writes its own zoning in its Land Use ordinance, because Kennebec County has no county zoning23. Septic systems must meet Maine's statewide wastewater rules4. Tiny homes of up to 400 square feet must be allowed wherever single-family homes are5.

At a glance

Building permit
Required in Augusta; issued by the city's Code Enforcement bureau61
Zoning
Yes, the city's own Land Use ordinance (Chapter 300); Kennebec County does not zone23
Septic permit
Required; Maine CDC rules, permits handled through the city's Code Enforcement bureau41
Tiny homes
Maine municipalities must allow them where single-family homes are allowed, up to 400 sq ft5
Accessory dwellings
State law requires municipalities to allow at least one accessory dwelling unit on a single-family lot7
Owner-builder electrical
Allowed with a state single-family dwelling certificate and inspection8

Who to call

Building permits

City of Augusta Code Enforcement

Building, plumbing and septic permits, plus inspections of new construction and renovation inside Augusta

207-626-2365

16 Cony Street, Augusta, ME 04330

Septic permits

Maine CDC Subsurface Wastewater Program

Statewide septic (subsurface wastewater) rules, the HHE-200 permit form and technical support

(207) 287-2070

subsurface.wastewater@maine.gov

Contact details are copied from each office’s official page and were checked against it on October 24, 2026.

Off-grid gear

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

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Does Augusta, Maine have zoning, and what does it mean for lot size and setbacks?

Yes. Augusta zones land inside city limits through its own Land Use ordinance, Chapter 300, Part 3 Zoning2. Kennebec County has no county zoning ordinance, so the city's districts are the rules that matter here3. The ordinance publishes residential, commercial, industrial, rural and overlay districts9; the Code Enforcement page links the zoning map1.

Dimensions change by district. In the main single-family district RA, a lot needs 10,000 square feet on public sewer or 20,000 square feet on private sewer, with 100 feet of frontage, and side and rear setbacks of 10 feet for the house and 5 feet for accessory buildings1011. In the rural residential district RRES, single developments and minor subdivisions need 60,000 square feet, 200 feet of road frontage and 30,000 square feet of land per dwelling, with a 30-foot height limit1213. RRES front setbacks are 35 feet from arterial and collector streets and 20 feet from other streets14.

Do you need a building permit in Augusta, and who issues it?

Yes. Augusta requires building permits for construction inside the city, and the Code Enforcement bureau at 16 Cony Street issues them61. Bureau staff inspect new construction and renovation for compliance and enforce city ordinances1. The bureau's own page says its permits are building, plumbing and septic permits, so zoning questions, flood permits and street work may start at other city counters1.

Maine's statewide building code applies to every building constructed or renovated in the state, and enforcement is mandatory in municipalities of 4,000 or more residents15. Barns and other buildings used to house livestock, store harvested crops or cultivate crops are exempt from that code, but not necessarily from zoning, shoreland or septic rules16. Call Code Enforcement for current fees and application steps; we could not confirm them.

How do septic permits work inside Augusta?

A permit is required before installing a new, expanded or replacement septic system anywhere in Maine, and the permit is valid for work started within 24 months4. Applications generally need a site evaluation by a licensed site evaluator or professional engineer4. In Augusta, the Code Enforcement bureau handles septic permits alongside building and plumbing permits1, using the state's HHE-200 form17.

The state's scheduled fee for a complete non-engineered system is $250, plus listed surcharges18. The system must pass two inspections, one at site preparation and one before final backfilling19. Only about 4.3% of soils across Kennebec County rate as not limited for a conventional drain field, so expect a site evaluation and sometimes an engineered system20. For rules questions, the Maine CDC Subsurface Wastewater Program answers at (207) 287-207021.

Can you live in an RV or tiny home in Augusta?

Tiny homes have a clear state answer. Maine requires municipalities to permit a tiny home of no more than 400 square feet on a house lot where single-family dwellings are allowed, or as an accessory structure, subject to the same land use requirements as those buildings5. Manufactured housing must likewise be allowed in every zone where single-family homes are allowed22. A municipality must also allow at least one accessory dwelling unit on a single-family lot, with a minimum size of 190 square feet unless the state sets a different standard7.

Living in an RV on a lot is a different question. We could not confirm whether Augusta's zoning allows long-term RV occupancy, so ask Code Enforcement at 207-626-2365 before parking one on your land1.

Building a home in Augusta: the steps, in order

  1. Confirm the zoning district and its lot size, frontage and setbacks on the city's zoning map and in Chapter 30029.
  2. If you are dividing land, ask the city about subdivision review; Augusta distinguishes minor from major subdivisions in its zoning23.
  3. On a lot without public sewer, hire a licensed site evaluator and apply for a septic permit through Code Enforcement41.
  4. Apply for the building permit at Code Enforcement, 16 Cony Street1.
  5. Book the two septic inspections, at site preparation and before backfilling19.
  6. If you wire your own home, apply for the state single-family dwelling certificate and get the wiring inspected before it is enclosed24.
  7. Ask Code Enforcement for a certificate of occupancy before moving in; Maine bars occupancy in a municipality of more than 2,000 inhabitants until the building official issues one25.

What stays with Kennebec County and the state, and what to check before you buy

The county does not zone or issue building permits; septic rules come from the state's Subsurface Wastewater Program321. For land outside Augusta, see the Kennebec County page.

A driveway onto a state or state-aid highway needs a MaineDOT driveway or entrance permit for a new entrance or a change of use26. Development in a flood-prone area may need a Flood Hazard Development Permit where a local floodplain ordinance applies, so ask Code Enforcement whether a parcel is mapped27.

County-level figures: Kennebec County's effective property tax rate is 1.1%, and the median property tax bill is $2,510 a year2829. Typical home insurance runs about $1,137 a year30.

Watch-outs

  • We could not confirm Augusta's rules on long-term RV occupancy, minimum dwelling size, lot coverage or short-term rentals; ask Code Enforcement at 207-626-2365 before you rely on any of them1.
  • The ordinance's table of allowed land uses was not reviewed, so check the table for your district before assuming a use is allowed2.
  • RA and RRES dimensions are only two of Augusta's districts; look up your parcel's own district before buying9.
  • Shoreland and state wastewater rules can require more than the base district minimums10.

Sources

  1. City of Augusta Code Enforcement (augustamaine.gov)
  2. Article III: Zoning District Requirements - City of Augusta, ME (eCode360, Chapter 300 Land Use, Part 3 Zoning) (Augusta), quoted and re-checked
  3. Maine Revised Statutes Title 30-A (municipal land use enforcement) (2026 county census)
  4. Subsurface Wastewater System Permitting, quoted and re-checked
  5. MRS Title 30-A, §4363: Regulation of tiny homes, quoted and re-checked
  6. City of Augusta Code Ch. 134 Building Construction (2026 county census)
  7. Title 30-A, §4364-B: Accessory dwelling units, quoted and re-checked
  8. Title 32, §1102-D: Single-family dwelling exception; certificate required (2026 county census)
  9. Article III: Zoning District Requirements - City of Augusta, ME (eCode360, Chapter 300 Land Use, Part 3 Zoning) (Augusta), quoted and re-checked
  10. Article III: Zoning District Requirements - City of Augusta, ME (eCode360, Chapter 300 Land Use, Part 3 Zoning) (Augusta), quoted and re-checked
  11. Article III: Zoning District Requirements - City of Augusta, ME (eCode360, Chapter 300 Land Use, Part 3 Zoning) (Augusta), quoted and re-checked
  12. Article III: Zoning District Requirements - City of Augusta, ME (eCode360, Chapter 300 Land Use, Part 3 Zoning) (Augusta), quoted and re-checked
  13. Article III: Zoning District Requirements - City of Augusta, ME (eCode360, Chapter 300 Land Use, Part 3 Zoning) (Augusta), quoted and re-checked
  14. Article III: Zoning District Requirements - City of Augusta, ME (eCode360, Chapter 300 Land Use, Part 3 Zoning) (Augusta), quoted and re-checked
  15. Building & Energy Codes, quoted and re-checked
  16. Title 10, §9722: Technical Building Codes and Standards Board, quoted and re-checked
  17. Maine CDC Subsurface Wastewater System Permitting (2026 county census)
  18. Subsurface Wastewater System Permitting, quoted and re-checked
  19. Subsurface Wastewater System Permitting, quoted and re-checked
  20. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  21. Maine CDC Subsurface Wastewater Program (maine.gov)
  22. Title 30-A, §4358: Regulation of manufactured housing, quoted and re-checked
  23. Table of Contents - City of Augusta, ME (eCode360) (Augusta), quoted and re-checked
  24. Title 32, §1102-D: Single-family dwelling exception; certificate required, quoted and re-checked
  25. Title 25, §2357-A: No occupancy without certificate; appeal, quoted and re-checked
  26. Driveway and Entrance Permitting, quoted and re-checked
  27. Floodplain Ordinances & Permit Forms (Maine statewide rule), quoted and re-checked
  28. Effective property tax rate: Bolthole Index county data
  29. Median property tax bill: Bolthole Index county data
  30. Typical home insurance premium: Bolthole Index county data

Written October 24, 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 Augusta

Augusta’s own rules

  • Local zoningPresent (with conditions)

    Land inside Augusta city limits; the city's own zoning ordinance (Chapter 300 Land Use, Part 3 Zoning) governs use and dimensional rules there.

    • Zoning districts are shown on the Official Zoning Map adopted by reference (per the Article III and §300-302 text), and the land use table is an attachment to the chapter that was not retrieved.
    • Urban growth area, rural and overlay districts are each governed by separate sections of Article III.
    “see the table of land uses in the base zoning districts, included as an attachment to this chapter.”
  • Zoning districtsPublished

    Land inside Augusta city limits

    • Article III lists urban growth area residential districts (RA, RB1/RB2, RC, RD), capital-commerce, civic center, industrial, planned development, government services, Riggs Brook Village, medical/hospital, PD2, Kennebec Locks and Westside Professional districts; rural districts RR, RRES, RPDS, RV and RR2; and overlay districts. Only the RA, RRES and RBV/RD/RC dimensional sections were read.
    “§ 300-314.1 residential districts. § 300-314.2 capital-commerce districts.”
  • Minimum lot sizeSpecified

    Main single-family residential district RA (low-density residences), inside Augusta city limits

    • Dimensional figures are minimums; where the minimum lot size law, special shoreland standards, or state of Maine wastewater disposal rules impose greater requirements, those additional requirements shall be met.
    • Lot area is 20,000 sq ft where served by private sewer.

    minimum lot area (public sewer): >= 10000 square feet (20,000 square feet with private sewer) · lot area per dwelling unit: >= 5000 square feet · lot frontage: >= 100 feet · lot depth: >= 100 feet

    “(a) lot area: 10,000 square feet (public sewer); 20,000 square feet (private sewer). (b) lot area per dwelling unit: 5,000 square feet. (c) lot frontage: 100 feet. (d) lot depth: 100 feet.”
    One more reviewed finding on this topic
  • SetbacksSpecified

    Main single-family residential district RA, inside Augusta city limits

    • Front setback is governed by §300-515, which was not retrieved; front setback figure is therefore not stated here.
    • Side and rear setbacks are stated as minimums in the RA dimensional list.

    side and rear setback, principal structures: >= 10 feet · side and rear setback, accessory structures: >= 5 feet

    “(e) front setback: see § 300-515. (f) side and rear setback: [1] principal structures: 10 feet. [2] accessory structures: five feet.”
    One more reviewed finding on this topic
  • Building heightSpecified

    Rural residential district RRES (§300-315.2), single developments and minor subdivisions, inside Augusta city limits

    • Height limit listed for single developments and minor subdivisions; major subdivision height not separately read.

    maximum building height: <= 30 feet

    “(e) minimum building setbacks: [amended 12-5-2019 by ord. no. 19-192] [1] front: 35 feet from arterial/collector streets. 20 feet from all other streets or right-of-ways. [2] side/rear: see § 300-502, buffer yards. (f) maximum building height: 30 feet.”
  • Subdividing landRegulated (with conditions)

    Division of land inside Augusta city limits

    • Zoning text distinguishes single developments and minor subdivisions from major subdivisions with different lot sizes (RRES: 60,000 sq ft vs 40,000 sq ft).
    • Subdivision procedure in chapter 245 was not opened.
    “chapter 245 subdivision of land (§ 245-1 &ndash; § 245-3)”

Rules another office applies inside Augusta

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

  • Who permits septicState (with conditions)

    Private-sewer (septic) lots inside Augusta city limits, as far as the zoning lot-size text reaches

    • The zoning text makes Maine wastewater disposal rules an additional requirement for lot area where they are stricter; it does not name the permitting agency.
    • Local septic permit and inspection process was not located.
    “the following shall be considered minimums; where the minimum lot size law, special shoreland standards, or state of maine wastewater disposal rules impose greater requirements, those additional requirements shall be met:”

Still unanswered

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

  • Building permit — New construction inside Augusta city limits
  • Owner-builder exemption — Owner-builder construction inside Augusta city limits
  • Building code adopted — Building construction inside Augusta city limits
  • Inspections — Inspections of construction inside Augusta city limits
  • Certificate of occupancy — Occupancy of new dwellings inside Augusta city limits
18 more unanswered
  • Minimum dwelling size
  • Lot coverage
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Driveway access
  • Building in a floodplain
  • 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 Augusta publishes no rule on the point, not that none exists. Kennebec County’s page lists the county offices to call.

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