Town Permit Guide

Home › Massachusetts › Hamilton › Sheds & Accessory Buildings

Do I need a permit for a shed in Hamilton, Massachusetts?

Hamilton, Essex County · Bylaws checked 2026-10-03 · Reviewed · 4 cited sections

Allowed

Yes. One small storage shed, no larger than 8 by 12 feet and no taller than 10 feet, can sit as close as 5 feet to the side and rear lot lines. Larger sheds and other accessory buildings must be at least 25 feet from the street line and at least 20 feet (or their height, if greater) from side and rear lot lines.

Small shed size limit8 ft x 12 ft, max 10 ft tall (one per lot) [1]
Small shed side/rear setback5 feet [1]
Other accessory buildings: street setback25 feet from the street line [1]
Other accessory buildings: side/rear setback20 feet or the building's height, whichever is greater [1]
Distance from house20 feet unless both meet fire-safety rules [1]
Max building coverage (R-1A, R-1B, RA)25% of the lot [3]
Max building height35 feet [3]

Sheds are an allowed accessory use

In the R-1A, R-1B and RA residential districts and the Downtown Residential sub-district, tool sheds, garden sheds, storage sheds and similar buildings are allowed as accessory uses, subject to the dimensional rules in Section 4.0 [2].

Setbacks

Section 4.1.5 sets the placement rules for accessory buildings, including detached garages [1]:

  • Street: at least 25 feet from the street line.
  • Side and rear lot lines: at least 20 feet, or the building's height if that is greater.
  • Small-shed exception: one storage shed no bigger than 8 x 12 feet and no taller than 10 feet may sit as close as 5 feet to the side and rear lot lines. The exception doesn't change the 25-foot street setback.
  • Distance from the house: at least 20 feet from the house or main structure, unless both buildings meet fire-safety rules.

Height and lot coverage

The Table of Dimensional Regulations caps building height at 35 feet and building coverage at 25% of the lot in the R-1A, R-1B and RA districts [3]. A shed counts toward that coverage limit.

Near wetlands

The general wetlands bylaw bans building construction of any kind, sheds included, in the no-build zone it sets near wetlands [4]. If your yard is within 100 feet of a wetland or 200 feet of a river or stream, talk to the Conservation Commission before placing a shed.

Building permit

The zoning bylaw doesn't say which sheds need a building permit. The State Building Code sets that threshold, and the zoning setbacks apply whether or not a permit is needed.

See how Hamilton compares with 8+ other Massachusetts towns on sheds & accessory buildings →

Next steps

  1. Measure your planned shed: an 8 x 12 ft (or smaller) shed under 10 ft tall can go 5 ft from side and rear lines; anything bigger needs 20 ft (or its height).
  2. Keep every accessory building at least 25 feet back from the street line and, ideally, 20 feet from the house.
  3. Ask the Building Department (978-626-5250) whether your shed needs a building permit, and bring a plot plan showing distances to lot lines.
  4. If the shed is near a wetland, pond or stream, contact the Conservation Commission before you build.

Common questions

Can I build a shed in Hamilton, Massachusetts?
Yes. One small storage shed, no larger than 8 by 12 feet and no taller than 10 feet, can sit as close as 5 feet to the side and rear lot lines.
How close to the property line can a larger shed be in Hamilton, Massachusetts?
Larger sheds and other accessory buildings must be at least 25 feet from the street line and at least 20 feet (or their height, if greater) from side and rear lot lines.
Do I need a building permit for a shed in Hamilton, Massachusetts?
Ask the Building Department whether your shed needs one, and bring a plot plan showing distances to lot lines.
How much of my lot can buildings cover in Hamilton, Massachusetts?
In R-1A, R-1B and RA districts, maximum building coverage is 25% of the lot.

Massachusetts building code rules for sheds

The Massachusetts State Building Code (780 CMR, 10th edition) sets when a shed needs a building permit. Your town's zoning sets where it can go.

  • No building permit needed for a one-story detached accessory structure used as a tool or storage shed, playhouse or similar, if the floor area is 200 sq ft or less (Residential Code R105.2).
  • Bigger sheds, or any with more than one story, need a building permit from your local building department.
  • Also exempt from a building permit: detached decks of 200 sq ft or less that are no more than 30 inches above grade, and greenhouses covered only in plastic film.
  • The exemption covers only the building permit. Electrical, plumbing or gas work in the shed still needs its own permits, and the shed still has to meet local zoning (setbacks, lot coverage, height). Many towns set accessory-structure setbacks even for small sheds.
  • Wetlands: putting a shed in a wetland resource area or within 100 feet of a wetland (or 200 feet of a river) may require Conservation Commission approval first, whatever its size.

The 10th edition took effect October 11, 2024 and has been the only code in force since July 1, 2025.

State sources: 780 CMR 10th ed., Residential Chapter 1, R105.2 (work exempt from permit) · BBRS, Tenth edition of the MA State Building Code 780 · MassDEP, Protecting Wetlands in Massachusetts

What the bylaw says

Exact text from Hamilton's published bylaws. Section numbers are as printed in the source.

  1. Sec. 4.1.5 Accessory Buildings, Zoning By-Law (first adopted 1954, including amendments up to December 9, 2025 STM), p. 32
    Accessory Buildings, including detached garages, shall not be located closer than twenty-five (25) feet from the Street line, nor any closer to any side or rear Lot line than the height of such accessory Building above the ground or twenty (20) feet, whichever is greater; provided, however, that one storage shed not larger than eight (8) feet by twelve (12) feet and not greater than ten (10) feet in height may be located not less than five (5) feet from the rear and side Lot lines. No accessory Building shall be located closer than twenty (20) feet from any Dwelling or main Structure on a Lot unless both Structures conform with regulations relative to fire safety.
  2. Sec. 3.2.2(3), Zoning By-Law (first adopted 1954, including amendments up to December 9, 2025 STM), p. 25
    Tool sheds, garden sheds, storage sheds, or other like Buildings are allowed as Accessory Uses subject to the dimensional requirements in Section 4.0.
  3. Sec. 4.1.2 Table of Dimensional Regulations, Zoning By-Law (first adopted 1954, including amendments up to December 9, 2025 STM), p. 31
    Maximum Building Height (ft.) 35 35 35 Maximum number of Stories 3 3 3 Maximum Building coverage of Lot (%) 25 25 25
  4. Ch. XVII General Wetlands Protection/Conservation Bylaw, Town By-Laws (updated May 1, 2024; through STM Nov 6, 2023, AG approved Feb 5, 2024), p. 39
    Building construction of any kind is prohibited in the no-building zone.
This page summarizes Hamilton's posted bylaws as of 2026-10-03. Bylaws are amended, and individual lots can have overlays, subdivision covenants, or HOA rules that are stricter. Confirm with Building Department (permits and inspections; online permit applications) (978-626-5250) before you build. Spot an error?