Zoning, building permits and septic rules in Town of Stow, Massachusetts
Town of Stow is a town in Middlesex County, Massachusetts. Town of Stow adopts its own zoning, so inside its limits Town of Stow’s rules apply, not the county’s. 7 rules below are quoted from official sources and independently re-checked, most recently on October 29, 2026. Rules for unincorporated land are on the Middlesex County page.
Answers from the rulebook for Town of Stow
Town of Stow’s own rules
Local zoningPresent
Land inside Stow town limits: the Town of Stow administers its own zoning bylaw
The bylaw is titled 'Town of Stow Zoning Bylaw'; the PDF states it includes amendments through December 2, 2024 and the town zoning page lists a version as amended through October 27, 2025. The PDF version is the one opened and the October 2025 version was not opened.
“the zoning bylaw is the primary land use regulation in stow.”
Zoning districtsPublished
Land inside Stow town limits
Section 2.1.1 lists recreation-conservation, residential, business, compact business, commercial, industrial, lower village business, and refuse disposal districts; overlay districts are listed in section 2.1.2. The district map is incorporated by section 2.2 and was not opened.
“for the purposes of this bylaw, the town of stow is divided into the following zoning districts and overlay districts: 2.1.1 zoning districts recreation-conservation district residential district business district compact business district commercial district industrial district lower village business district refuse disposal district”
Minimum lot sizeSpecified
Land inside Stow town limits in the Residential district (the main residential district of the bylaw; table row 'res')
Table of dimensional requirements, section 4.4: 'these requirements shall be satisfied entirely within each district.'
The frontage column is followed by footnote (2): the minimum frontage on Route 117 (Great Road) is 200 feet except within the lower village business district. The residential row shows 200 ft frontage.
Recreation-conservation district (40,000 sq ft) and other districts are separate claims and are not covered here. The bylaw does not list a separate agricultural or rural-residential district.
Text extraction of the PDF table is column-ambiguous; the residential row reads as lot area 65,340 sq ft, frontage 200 ft, then front 30 ft, side 25 ft, rear 40 ft, open space 10%, floor area ratio not regulated ('nr'). Verify against the printed table.
minimum lot area: 65340 sq ft · minimum lot frontage: 200 ft (footnote (2) Route 117 frontage rule)
“res 65,340 200 (2) 30 25 40 10% nr bus 40,000 150 (2)”
SetbacksSpecified
Land inside Stow town limits in the Residential district (table row 'res')
Side and rear yards abutting a residential or recreation-conservation district from a nonresidential district are increased under footnote (1); that footnote does not govern the residential district row.
Section 4.4: 'these requirements shall be satisfied entirely within each district.'
minimum front yard: 30 ft · minimum side yard: 25 ft · minimum rear yard: 40 ft
“res 65,340 200 (2) 30 25 40 10% nr bus 40,000 150 (2)”
Manufactured homesProhibited
Mobile homes moved onto any lot inside Stow town limits for use as a dwelling
Exception stated in the sentence: 'except as provided in mgl ch. 40a, s.3.' The exception was not read.
“no trailer or mobile home shall be moved onto any lot within the town for use as a dwelling except as provided in mgl ch. 40a, s.3.”
Accessory dwellingsLimited
Accessory apartments / accessory dwelling units on the same lot as a principal dwelling inside Stow town limits
Definition: subject to otherwise applicable dimensional and parking requirements, and must have a separate entrance meeting state building code egress requirements.
Subject to additional restrictions in section 8.1 (Accessory Apartments), which was not opened.
maximum gross floor area: one-half of principal dwelling GFA or 900 sq ft, whichever is smaller
“is not larger in gross floor area than one-half (1/2) of the gross floor area of the principal dwelling or nine hundred (900) square feet, whichever is smaller”
Subdividing landRegulated (with conditions)
Subdivisions of land inside Stow town limits, administered by the Stow Planning Board
The page refers to 'approval not required' subdivisions in section 2 of the subdivision rules; the Subdivision Control Law (MGL c.41) applies, as the Planning Board Handbook describes, but that handbook was not opened.
“subdivision rules and regulations (pdf) for all subdivisions in stow”
Still unanswered
We looked and could not find an official answer yet. Silence is not permission; ask Town of Stow or Middlesex County directly.
Building permit — Building permits for new residential construction inside Stow town limits
Owner-builder exemption — Owner-builder construction inside Stow town limits
Building code adopted — Building code in force for construction inside Stow town limits
Inspections — Building inspections inside Stow town limits
Certificate of occupancy — Certificates of occupancy for new dwellings inside Stow town limits
15 more unanswered
Minimum dwelling size
Lot coverage
Building height
Camping on your land
Tiny homes
Who permits septic
Septic permit
Septic inspection
Off-grid sanitation
Well permit
Mandatory utility hookup
Agricultural exemption
Driveway access
Short-term rentals
Permit fees
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 Stow publishes no rule on the point, not that none exists. Middlesex County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Town of Stow means bringing your own water and power. The kit we’d start with:
