Zoning, building permits and septic rules in Town of Blackstone, Massachusetts
Town of Blackstone is a town in Worcester County, Massachusetts. Town of Blackstone adopts its own zoning, so inside its limits Town of Blackstone’s rules apply, not the county’s. Septic permits inside Town of Blackstone come from the county and state together. 7 rules below are quoted from official sources and independently re-checked, most recently on October 23, 2026. Rules for unincorporated land are on the Worcester County page.
Answers from the rulebook for Town of Blackstone
Town of Blackstone’s own rules
Local zoningPresent (with conditions)
Land inside Blackstone town limits: the Town administers its own Chapter 123 Zoning.
Only the table of contents and the intensity-of-use schedule were read; the use-table footnotes, zoning map and full zoning text were not opened within the research budget.
“the intensity of use requirements shall be as follows: districts r-1 g r-2 r-3 i c minimum lot area (square feet)”
Minimum lot sizeSpecified
Single-family residence district R-1 inside Blackstone town (Chapter 123 intensity-of-use schedule).
Chapter 188 § 188-1 subsection f says the town raised the minimum lot size to 28,000 square feet and frontage to 140 feet; the R-1 schedule reads 35,000 square feet and 150 feet. The conflict is unresolved here; the zoning schedule is quoted as the operative figure.
Footnote a: access limitations may increase requirements; see § 123-12j, access and lots. Footnote e was not read.
No agricultural or rural-residential district was identified in the schedule text read.
minimum lot area: >= 35000 square feet (footnote a: access limitations may increase requirements; footnote e not read) · minimum lot frontage: >= 150 feet (Chapter 188 cites 140 feet; conflict unresolved)
“minimum lot area (square feet) a,e 35,000 65,000 120,000 30,000 15,000 minimum lot frontage (feet) 150 185 275 140 100 b”
Lot coverageSpecified
Single-family residence district R-1 inside Blackstone town (Chapter 123 intensity-of-use schedule).
Column mapping follows the table's left-to-right order with R-1 first.
maximum lot coverage: <= 30 percent
“maximum lot coverage (percent) 30 25 25 40 40”
Building heightSpecified
Single-family residence district R-1 inside Blackstone town (Chapter 123 intensity-of-use schedule).
Footnote h referenced in the height row was not read.
maximum building height: <= 35 feet (footnote h not read)
“maximum building height (feet) h 35 35 35 45 45”
Who permits septicMixed (with conditions)
Subsurface sanitary disposal (septic) for land inside Blackstone town: state Title 5 (310 CMR 15.00) applies with the Town's supplemental regulations adopted by the Board of Health (Chapter 188).
Title 5 is the state code; the town's supplement is stricter and is enforced together with it.
County or district health involvement and the Board of Health permit office were not verified beyond the Chapter 188 text.
“the laws and design standards of title 5, as well as these supplemental regulations, shall be strictly enforced.”
Septic permitRequired
Installing or altering a subsurface sanitary disposal system inside Blackstone town.
The permit is issued under the Town's Board of Health supplemental regulations alongside Title 5; the permit fee and form were not verified on an official page.
Maximum groundwater is determined by deep observation wells from February 15 to May 15 each year, revisable yearly by the Board of Health.
Chapter 188 says the groundwater order overrules Title 5's four-foot groundwater depth.
All components of a subsurface system must be readily accessible through a minimum 24-inch manhole.
minimum separation from maximum groundwater elevation to leaching system: >= 5 feet (Overrules Title 5 four-foot allowance)
“it shall be the responsibility of the individual(s) who(m) is applying for a permit to install or alter a disposal system to remain current with the dates that are applicable.”
Subdividing landRegulated (with conditions)
Division of land inside Blackstone town.
Only the table of contents was read; the subdivision chapter text (Chapter 191) was not opened.
“chapter 191 subdivision of land (§ 191-1 – § 191-19)”
Still unanswered
We looked and could not find an official answer yet. Silence is not permission; ask Town of Blackstone or Worcester County directly.
Building permit — Building permits for new homes inside Blackstone town.
Building code adopted — Building code adoption inside Blackstone town.
Inspections — Building inspections inside Blackstone town.
Certificate of occupancy — Certificate of occupancy for new homes inside Blackstone town.
14 more unanswered
Minimum dwelling size
Living in an RV
Camping on your land
Tiny homes
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 Town of Blackstone publishes no rule on the point, not that none exists. Worcester County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Town of Blackstone means bringing your own water and power. The kit we’d start with:
