Zoning, building permits and septic rules in Town of Windsor, Massachusetts

Town of Windsor’s own rules

• Building permitRequired

  New construction, moving, alteration or change of use of buildings and structures inside Windsor town.

  • Permits are not required for repair or alteration that does not alter the exterior shape or dimensions and does not change the use (section 10.2).
  • Percolation tests under 310 CMR 15.00 are excepted from the site-work prohibition.
  • Section 10.2 also requires a wetlands determination check before site work on any lot.

  “no construction on a building or structure shall be commenced, or building or structure moved, altered or changed until a building permit for the proposed construction, moving, alteration or change shall be properly applied for and granted”

• InspectionsRequired

  Construction inside Windsor town, including electrical, gas and plumbing work.

  • Town page says many inspections are described in the zoning bylaws; the inspection sequence and fees were not read.
  • Health-related inspections include septic and water.

  “windsor requires inspections for many aspects of construction including electric, gas & plumbing, and various health related activities such as septic and water.”

• Certificate of occupancyRequired

  Buildings or structures erected, altered or relocated inside Windsor town.

  • The occupancy permit is issued by the inspector of buildings and is granted only if the use complies with the zoning by-law.
  • Section 11.1 also applies to changes of use of buildings or premises.

  “11.1 no building or structure hereafter erected, altered or relocated shall be used, and no change shall be made of any buildings or structure or of any premises and not water shall be impounded behind any dam designed to impound more than three million gallons of water unless an occupancy permit has been granted by the inspector of buildings to the owner or occupancy of such premises, buildings or structure.”

• Local zoningPresent (with conditions)

  All land inside Windsor town limits: the Town of Windsor adopts and administers its own Zoning By-laws under M.G.L. c. 40A.

  • The zoning by-law text on file is dated 'revised February 26, 2026'; that is a revision stamp, not a stated effective date, so effective_at is left null.
  • Zoning is enforced by the inspector of buildings (section 10.1).

  “zoning bylaws [pdf] of the town of windsor revised february 26, 2026. these are the zoning bylaws that relate to construction of all kinds.”

• Zoning districtsPublished (with conditions)

  Land inside Windsor town limits. The bylaw establishes a single base district, the residential-agricultural district.

  • Section 2.2 allows commercial, industrial and other uses only by special permit from the Zoning Board of Appeals.
  • The bylaw names no separate rural-residential or commercial base district in the sections read; sections 8 and 24 were not fully read for further district schedules.

  “2.1 for the purposes of this bylaw, a residential-agricultural zoning district in the town is hereby established with other uses permitted as set forth in section 2.2.”

  One more reviewed finding on this topic

  • Published — Residential-agricultural district inside Windsor town: single-family homes and usual accessory structures are a permitted use.

    “the following uses are permitted under this by-law: 5.1 single family residences and usual accessory structures.”

• Minimum lot sizeSpecified

  Residential-agricultural district (the only base district in the bylaw) inside Windsor town: every lot carrying a dwelling or principal use.

  • Section 8.5: no lot may be changed in size so as to violate lot area, frontage or yard requirements.
  • Section 8.7: a building with more than one dwelling unit needs at least 3 acres for each dwelling unit.
  • Section 3.6: non-conforming lots of record or lots shown on a planning-board-endorsed plan are exempt to the extent provided in M.G.L. c. 40A, section 6.
  • Section 8.3 frontage requirement applies as a second dimensional rule (see the frontage parameter).

  minimum lot area: >= 3 acres (Non-conforming lots of record under section 3.6 are exempt to the extent provided by M.G.L. c. 40A, s. 6.) · minimum frontage: >= 250 feet (Frontage on a public way or a way approved under the subdivision control law.)

  “8.2 the lot area shall not be less than 3 acres. 8.3 frontage for any lot shall not be less than 250 feet on a public way or a way approved under the provisions of the subdivision control law.”

• SetbacksSpecified

  Residential-agricultural district inside Windsor town: buildings used for dwelling or commercial purposes and any building housing a principal permitted use.

  • Front setback is measured from the street line where a plan of the way is on file with the registry of deeds; otherwise from a line 25 feet from the centre line of the travelled way (section 8.4).
  • Section 8.6: an accessory building must be no closer to a lot line and street line than the minimum distance required for a principal building.
  • Section 6.2 allows the ZBA, on a special permit, to require yards greater than these minimums.
  • Setback relief is by variance under the Zoning Board of Appeals (section 14); this claim did not read the variance section.

  minimum front setback: >= 35 feet (Measured per section 8.4 from street line or the line 25 feet from centre line of travelled way.) · minimum side yard: >= 50 feet · minimum rear yard: >= 50 feet

  “8.4 minimum front setback shall be 35 feet, side yard 50 feet, and rear yard 50 feet.”

• Building heightSpecified

  Any structure in Windsor town that is more than 2 1/2 stories or 35 feet high, and any structure with more than one dwelling unit.

  • These structures are special-permit uses under section 6.3 (item g) and need a special permit from the Zoning Board of Appeals.
  • Silos and steeples are excepted from the height limit.
  • Section 6.1 criteria apply to the special permit.

  maximum height without special permit: > 35 feet (Silos and steeples excepted. Structure height above 2 1/2 stories also requires special permit.)

  “g. structure with more than one dwelling unit; any structure of more than 2 ½ stories of 35 feet; excepting silos, steeples;”

• Living in an RVLimited

  Travel trailers registered for road travel, parked on another person's property inside Windsor town.

  • Limit is 60 days in one calendar year.
  • If the trailer is occupied it must have self-contained sewage storage capacity or adequate sanitary facilities (section 9.5).
  • A resident may store a registered or unregistered travel trailer on his own premises when not in use (section 9.6).
  • Long-term RV occupancy as a dwelling is governed by section 9.1 mobile-home rules.

  maximum days per calendar year on another's property: <= 60 days (Resident storage on own premises when not in use is allowed under section 9.6.)

  “9.5 travel trailers registered for travel on the public way may be parked on property of another within the limits of the town for period not to exceed 60 days in one calendar year. said travel trailer, if occupied, must have self-contained sewage storage capacity or adequate sanitary facilities provided.”

• Camping on your landLimited

  Temporary placement of a trailer or mobile home for camping or interim housing inside Windsor town.

  • Travel trailer parking on another's land is capped at 60 days per calendar year (section 9.5).
  • A mobile home placed under special permit runs at most six months per permit, renewable after public hearing in six-month intervals (section 9.2).
  • Board of appeals must have assurance the use ends on a triggering event such as completion of a house (section 9.4).

  special permit term for mobile home: <= 6 months (Renewable by the board of appeals after a public hearing, in additional intervals of up to six months each.)

  “9.2 such permits shall not exceed six months, and may be renewed by the board of appeals after a public hearing and issuance of a special permit for additional intervals of up to six months each.”

• Manufactured homesLimited

  Mobile homes (the bylaw's term; manufactured homes are not separately defined in the sections read) inside Windsor town.

  • Permitted only by special permit from the Zoning Board of Appeals, or as provided by M.G.L. c. 40A, s. 3.
  • Board of Health must approve the sanitary sewer disposal system (section 9.3).
  • Permit term limited to six months, renewable (section 9.2); owner must give reasonable assurance the use will end (section 9.4).

  “9.1 no mobile home shall be parked placed or installed within the limit of the town, except as provided by chapter 40a, section 3 or with a special permit issued by the board of appeals”

• Who permits septicMixed (with conditions)

  Septic systems on land inside Windsor town limits.

  • State Title 5 (310 CMR 15.00) sets how systems are installed, used and maintained (cited by zoning section 10.2 for percolation tests).
  • The Windsor Board of Health requires that Title 5 inspections be witnessed by a Board of Health agent; scheduling is through the Berkshire Public Health Alliance.
  • Windsor Board of Health's own septic regulations were not located or read; this claim rests on the town inspections page.

  “it is the policy of the windsor board of health that all title 5 septic system inspections must be witnessed by an agent of the board of health.”

• Septic inspectionRequired

  Title 5 septic system inspections for homes inside Windsor town.

  • Witnessing is by a Board of Health agent, arranged through the Berkshire Public Health Alliance.
  • Installation inspection and perc witness requests follow the same route, per the town page.
  • Inspection cadence beyond the witnessing policy was not read.

  “it is the policy of the windsor board of health that all title 5 septic system inspections must be witnessed by an agent of the board of health.”

• Permit processPartial

  Building permit applications inside Windsor town.

  • Application must be made by the landowner or agent in writing on the form approved by the Select Board, with three copies of a site plan (section 10.4).
  • Appeals of an inspector's refusal go to the town clerk with an appeal fee set by the Select Board, within 30 days (section 10.9).
  • The application form, fee schedule and review timeline were not located, so the process is only partly published.

  “an application for a building permit shall be made by the landowner or his agent in the name(s) of the landowner in writing, on a form approved by the board of selectmen”

Still unanswered

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

• Owner-builder exemption — Owner-builder permit exemption inside Windsor town.
• Building code adopted — Which building code applies to construction inside Windsor town.
• Minimum dwelling size — Minimum floor area for a dwelling inside Windsor town.
• Lot coverage — Maximum lot coverage inside Windsor town.
• Tiny homes — Tiny home occupancy inside Windsor town.

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.