ADU Rules in Duxbury, MA
Yes. Duxbury allows ADUs by-right up to 900 sq ft. The friction is not zoning. It is septic capacity under Title 5, coastal flood rules, Conservation Commission filings, historic-district review, and the Planning Board Site Plan Review that Duxbury requires on every ADU.
Call BuildX: (781) 627-7000
Duxbury allows ADUs by-right
Special Town Meeting, June 16, 2025 · Articles 2 and 3Duxbury Town Meeting adopted its Protected Use ADU bylaw at the June 16, 2025 Special Town Meeting. Article 2 deleted the old Accessory Apartment Special Permit provision and replaced it with new Section 410.6, "Accessory Dwelling Units" [Bylaw §410.6] [STM 06/16/25]. Article 3 amended the Nonconforming Structures provision by adding Section 401.2(6), an exemption that makes it easier to add an ADU on a non-conforming lot [Duxbury Clipper, May 2025]. Detached, attached, and interior-conversion ADUs are allowed by-right on Duxbury single-family lots up to 900 sq ft or 50% of the principal dwelling, whichever is smaller.
Can I build an ADU in Duxbury, MA?
Yes. Duxbury allows detached, attached, and interior-conversion ADUs by-right on single-family lots up to 900 sq ft or 50% of the principal dwelling, whichever is smaller, under Section 410.6 (adopted June 16, 2025). All Duxbury ADUs are subject to Site Plan Review by the Planning Board, and short-term rentals are prohibited.
Show full bylaw basis and state law note
Duxbury's ADU rules live in new Section 410.6 of the Zoning Bylaw, adopted as Article 2 of the June 16, 2025 Special Town Meeting [Bylaw §410.6]. The Planning Board sponsored the article, and the Duxbury Clipper reported that the bylaw was modeled on a standard municipal template and confirmed by the interim Planning Director at a May 2025 hearing [Duxbury Clipper, May 2025].
State law sets the floor. The Massachusetts Affordable Homes Act (760 CMR 71.00, effective February 2, 2025) [760 CMR 71] [MGL 40A] already permits protected-use ADUs by-right in single-family residential zones statewide, up to 900 square feet, subject to the building code and septic capacity. Duxbury's June 2025 bylaw work added local objective standards within what state law allows. The 900 sq ft cap, the Planning Board Site Plan Review, and the short-term-rental prohibition all sit on top of that state floor.
Short-term rentals are prohibited. Duxbury's adopted bylaw explicitly bars using an ADU as a short-term rental as defined by MGL c. 64G [Duxbury Clipper, May 2025]. State law permits local short-term-rental restrictions, so Duxbury's prohibition is enforceable. Long-term rentals, in-law occupancy, multi-generational use, and aging-in-place applications are all permitted.
If your parcel sits in a sub-district or zoning variant and you are unsure whether the by-right path applies to it, confirm with the Duxbury Building Department at (781) 934-1100 ext. 6002 before you commit to design.
Duxbury allows ADUs on non-conforming lots
Even if your lot does not meet current zoning dimensional requirements, you may still be able to add an ADU without a special permit. Article 3 of the June 16, 2025 Special Town Meeting added Section 401.2(6) to the Nonconforming Structures provision, an exemption written specifically for ADU additions [Bylaw §401.2(6)] [Duxbury Clipper, May 2025]. Before this change, almost any alteration to a non-conforming single-family home required a Zoning Board of Appeals special permit. The new provision removes that step for ADUs.
This is unusual. Many South Shore towns still require a ZBA waiver for an ADU on a non-conforming lot, and Duxbury has a lot of older, undersized, pre-zoning parcels along the bay and in the village areas. If your parcel is one of them, confirm how the exemption applies to your specific lot with the Duxbury Building Department at (781) 934-1100 ext. 6002.
Garage conversion ADU
A common variation of either the detached or attached ADU paths, depending on the garage configuration. Duxbury's bylaw does not treat a garage conversion as a separate ADU category; it is classified based on whether the converted structure is structurally attached to the principal dwelling.
- If the garage is attached to the house: Treated as an attached ADU
- If the garage is detached from the house: Treated as a detached ADU
- Best for: Properties with a structurally sound existing garage; ability to reuse foundation, walls, and roof; faster framing than ground-up construction
- Watch for: Foundation adequacy, insulation upgrades, separate-entrance and bathroom plumbing additions, Title 5 septic capacity for the added bedroom, and parking layout if the original garage parking is lost
Duxbury ADU Rules at a Glance
The six things most homeowners ask first. Tap "View all rule details" for the complete data set.
View all Duxbury rule details
- ADU types allowed: Detached, attached, interior conversion
- Districts allowed in: All districts that allow single-family detached dwellings
- Bylaw section: Section 410.6 (ADU bylaw) and Section 401.2(6) (non-conforming lot exemption)
- Adopted: June 16, 2025 Special Town Meeting, Articles 2 and 3
- Owner-occupancy: Preempted by 760 CMR 71.00 for protected-use ADUs
- Long-term rental: Allowed
- Short-term rental: Prohibited (MGL c. 64G)
- Sewer status: Fully septic. No town-wide residential sewer
- Site Plan Review: Required by the Planning Board on all Duxbury ADUs
- Coastal flood: FEMA Zone V and Zone A common on the bay and Powder Point
- Setbacks: Conform to the principal-dwelling setbacks for the district. Confirm with the Duxbury Planning Department
- Max height: Per Section 410.6. Confirm with the Duxbury Planning Department at (781) 934-1100 ext. 6002
- Min lot: Per the district dimensional schedule. Confirm with the Duxbury Planning Department
Why BuildX Knows Duxbury ADUs
Duxbury is BuildX home territory. We are not a regional contractor visiting Duxbury, we are your neighbors. We know the Title 5 septic conversation, the coastal flood zones, the cranberry-bog wetland buffers, and the Planning Board Site Plan Review that shapes every Duxbury ADU.
Home Territory
Duxbury is part of BuildX's South Shore home territory. We work Duxbury because we live and build here, and we read the septic, flood, wetland, and historic constraints before we read the bylaw.
See One in Person
Walk through a real, finished BuildX ADU before you sign anything. Private showings are available by appointment.
Day 1 Property Review
Before quoting, we check zoning, septic capacity, FEMA flood zone, wetlands, cranberry-bog adjacency, and historic district status. In Duxbury, that order matters.
BuildX in Duxbury
Duxbury is BuildX home territory. We are not a regional contractor visiting Duxbury, we are your neighbors. BuildX is currently building and in pre-construction on four ADU projects in Duxbury:
- Levine: 900 GFA · 2-Bed, 1-Bath · Under Construction
- McCarthy: 900 GFA · 1-Bed, 1-Bath · Under Construction
- Mattern: 900 GFA · 1-Bed, 1-Bath · Pre-Construction
- Beaton: 900 GFA · 2-Bed, 1-Bath · Pre-Construction
Real families. Real builds. Real ADUs on the South Shore. See more BuildX ADU builds →
What Can Complicate a Duxbury ADU?
Duxbury's bylaw is the easy part. Your parcel's septic, flood, and wetland profile is what moves cost and timeline. The factors that come up most often:
Do I need septic approval for a Duxbury ADU? Septic
Likely affects you: Duxbury has no town-wide residential sewer, so almost every Duxbury ADU is a Title 5 conversation. Verify your specific parcel before design.
Almost certainly. Duxbury is fully septic for residential property, governed by Title 5 (310 CMR 15.000). Adding an ADU adds a bedroom, and a bedroom adds design flow, so your existing system's permitted capacity is what determines whether you can tie the ADU in or must upgrade.
Cost impact: $30,000 to $60,000 for a Title 5 upgrade or replacement when an older system cannot carry an additional bedroom, sometimes higher on a difficult coastal or wetland-adjacent site.
Order a Title 5 inspection first, before paying for design. If your lot is large enough, two separate septic systems may be allowed; if not, the existing system has to absorb the new flow. The Duxbury Board of Health enforces Title 5 locally.
What flood-zone rules affect Duxbury ADUs? Coastal flood
Likely affects you if: your parcel is on Duxbury Bay, Duxbury Beach, Powder Point, Green Harbor, or near a tidal creek or river. Pull the FEMA map for your address.
Duxbury sits on Cape Cod Bay, and FEMA Zone V and Zone A run along the bay, Duxbury Beach, Powder Point, and the coastal areas. Inland flood zones also extend deeper than people expect because of cranberry bogs, marshes, and tidal creeks.
Cost premium: 15% to 25% on top of base ADU cost in Zone V or Zone A for engineer-stamped flood compliance, elevated foundations, flood vents, flood-resistant materials, and breakaway walls in V-zones.
Many parts of "rural" inland Duxbury also map into a flood zone because of the wetland and bog network. Pull the FEMA map for your specific parcel before designing, not after.
Will cranberry bogs or wetlands affect my Duxbury ADU? Wetlands
Likely affects you if: your lot is within roughly 100 ft of a bog, marsh, brook, river, tidal water, or oyster flat. Many Duxbury lots are, even when they look dry.
Duxbury is the sixth-largest cranberry producer in Massachusetts and has many active and former bogs, oyster beds, tidal creeks, and rivers. A lot adjacent to any of these resources triggers a Notice of Intent filing with the Duxbury Conservation Commission under the Massachusetts Wetlands Protection Act (MGL c.131 §40), and likely a local wetlands bylaw as well.
Timeline impact: a Notice of Intent adds roughly 6 to 10 weeks. It is routine for a competent design team, but it is a step that surprises homeowners who did not know their lot had wetland adjacency.
The state wetland buffer is 100 ft. We pull the wetland map and the bog overlay for your parcel on Day 1 so we know early whether we are filing with the Conservation Commission.
Does a historic district affect my Duxbury ADU? Historic
Likely affects you if: your parcel is in or near the town common, Powder Point, Snug Harbor, or another historic or scenic coastal area, and your ADU is visible from a public way.
Duxbury is Pilgrim country. Myles Standish settled here in 1627, the John Alden House dates to about 1653, and the town carries deep historic and shipbuilding-era character. Some districts and scenic coastal areas apply design review, and a detached ADU visible from a public way may face additional design standards.
Cost impact: design review can add architectural cost on visible work in a historic area. The dollar premium depends on materials, fenestration, and the specific district.
Confirm whether your parcel is in a design-review area with the Building Department before you finalize the elevations.
What is Site Plan Review and does every Duxbury ADU need it? Process
Affects every Duxbury ADU: Section 410.6 requires Planning Board Site Plan Review on all ADUs, within the objective standards permitted by state law.
Duxbury requires Site Plan Review by the Planning Board for every ADU [Duxbury Clipper, May 2025]. This is a review against objective standards, not a discretionary special permit, so it does not make the ADU a special-permit project, but it is a step you have to plan for. Budget roughly 30 to 60 days for it.
If your parcel is in a Cluster or Planned Development, there is an additional layer: the Design Review Board and the homeowners association review the project, with about 21 days for HOA recommendations, before the Zoning Board of Appeals. Build that into the schedule if you live in one of those developments.
Does the MBTA affect Duxbury ADU parking? Transit
Lightly relevant: Duxbury has no commuter rail station within town limits, so most Duxbury parcels do not qualify for the state transit-parking exemption.
Duxbury does not have a commuter rail station in town. The closest is Kingston Station on the Kingston/Plymouth Line, in neighboring Kingston, roughly 2 to 4 miles from various Duxbury neighborhoods [MBTA]. The state designates Duxbury an MBTA "adjacent community" because of the Kingston border, which is what drove Duxbury to adopt its Multi-Family Overlay District at the same June 2025 Town Meeting.
The "adjacent community" status does not extend the state transit-parking exemption to most Duxbury parcels. Section 410.6 generally calls for one designated off-street parking space for the ADU. A parcel within roughly half a mile of public transit may have lighter parking requirements under state law; in Duxbury that is a small set of parcels. Confirm your parcel's distance before assuming the exemption applies.
What Does a Duxbury ADU Cost?
A Duxbury ADU should not be priced from square footage alone. Two 800 sq ft ADUs can price very differently depending on septic capacity, flood elevation, conservation review, and historic-district design requirements. Septic is the variable that moves the number most.
That is the full span of our 14 floor plans. Prices include the complete building package, foundation through move-in-ready finishes. Site work is priced separately after a lot evaluation.
Duxbury-specific cost premium factors
See full ADU pricing and floor plans. For a Duxbury-specific quote, call (781) 627-7000. We will not quote a Duxbury ADU until we know your septic status, your FEMA flood zone, and whether your lot has wetland adjacency.
How the Duxbury ADU Permit Process Works
In Duxbury the sequence starts underground. Septic capacity comes first, because it can change everything that follows.
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1
Title 5 septic capacity review
Week 1
Order a Title 5 inspection of the existing septic system first. It tells you whether the system supports an additional bedroom or whether a new or upgraded system must be designed. The septic answer is usually the gating cost item on a Duxbury ADU, $30,000 to $60,000 if an upgrade is needed.
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2
Site Plan Review (Planning Board)
Typically 30 to 60 days
Required by Section 410.6 for all Duxbury ADUs. The Planning Board reviews against objective standards within the parameters state law allows. If your lot is non-conforming, Section 401.2(6) generally removes the special-permit step that older bylaws required.
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3
Conservation Commission filing (if applicable)
Add 6 to 10 weeks when triggered
A Notice of Intent under the Wetlands Protection Act, and likely the local wetlands bylaw, for ADUs on lots adjacent to bogs, marshes, rivers, brooks, or tidal water. File this in parallel with Site Plan Review when the lot has wetland adjacency.
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4
Building permit (Building Department)
After Site Plan Review and septic are resolved
Submit to the Building Department, headed by Building Commissioner James B. Wasielewski [Building Dept]. Permits are picked up in person at Municipal Services, 2nd floor, 878 Tremont Street. The physical permit must be on site before work starts. Best windows to deal with the department: Monday before 7 PM (extended hours) or Tuesday through Thursday daytime; Friday is closed to the public.
Overall planning assumption: roughly 90 to 180 days from Title 5 inspection to issued building permit on a non-overlay parcel. Allow 120 to 240 days for a wetland-adjacent lot or a Cluster/Planned Development parcel.
After permits issue, construction inspections run through the Duxbury Building Department. Confirm current administrative posture at (781) 934-1100 ext. 6002.
What Duxbury Zoning Districts Allow ADUs?
Duxbury allows ADUs by-right in every district that allows a single-family detached dwelling, under Section 410.6. The dimensional schedule for each district lives in the Duxbury Zoning Bylaw. Where a specific number is not confirmed below, we route you to the Planning Department rather than guess, because a guessed setback or lot size can sink a design.
Residential districts Most Duxbury ADUs
- Min lot: Per district schedule. Confirm with Planning Dept
- Min frontage: Per district schedule. Confirm with Planning Dept
- Max coverage: Per district schedule. Confirm with Planning Dept
- Max height: Per Section 410.6. Confirm with Planning Dept
ADU rules: Detached, attached, and interior-conversion ADUs allowed by-right up to 900 sq ft or 50% of the principal dwelling, whichever is smaller. ADU setbacks conform to the principal-dwelling setbacks for the district.
What this means for your ADU: in Duxbury the district rarely decides feasibility. Septic capacity, flood zone, and wetland adjacency do. Confirm your district's lot, frontage, coverage, and height numbers with the Duxbury Planning Department at (781) 934-1100 ext. 6002 before design.
Cluster and Planned Developments
Lots inside a Duxbury Cluster or Planned Development carry an extra review layer. An ADU addition triggers Design Review Board and homeowners association review, with about 21 days for HOA recommendations, before the project reaches the Zoning Board of Appeals [Cluster/PUD].
What this means for your ADU: if you live in one of these developments, plan an additional 45 to 90 days for the HOA and Design Review Board steps. Everything else about the ADU rules is the same.
Overlay districts. Floodplain, Multi-Family, watershed
Duxbury maps a Floodplain Overlay over the FEMA-designated coastal and inland flood areas, and adopted a Multi-Family Overlay District (Section 440) at the same June 16, 2025 Town Meeting, at Island Creek Village on Tremont Street and the Village at Duxbury on Route 53 [STM 06/16/25]. Overlays modify, but do not by themselves prevent, ADU construction.
Overlay analysis happens on Day 1. We pull your parcel's flood, wetland, and overlay layers before quoting.
Septic, Not Sewer. Duxbury Is Fully Septic.
This is the single biggest cost variable in any Duxbury ADU project. Duxbury has no town-wide residential sewer. Almost every Duxbury home is on private septic governed by Title 5, so adding an ADU means a wastewater capacity conversation on essentially every parcel.
Show Title 5 detail and what it means for your ADU
- Sewer status: Fully septic. No town-wide residential sewer
- Title 5 trigger: Adding an ADU bedroom adds design flow, so a capacity check is required
- Septic upgrade cost: $30,000 to $60,000 typical, higher on difficult sites
- Tie-in option: Possible if the existing system has available permitted capacity
- Two-system option: A separate ADU system may be allowed if the lot is large enough
- Enforcement: Duxbury Board of Health under Title 5 (310 CMR 15.000)
Older Duxbury homes often have aging systems that cannot accept an additional bedroom without an upgrade. We do not quote a Duxbury ADU until a Title 5 inspection has answered the capacity question for your specific property. It is the first thing we order and the single most important number on the project.
Duxbury Is Five Markets in One
Duxbury is about 24 square miles of land and a lot of water, with three census-designated places and several distinct coastal and historic areas. The areas that come up most often in ADU planning each have their own septic, flood, and design context. A Powder Point ADU is a different project from an inland western Duxbury ADU.
Duxbury ADU Feasibility by Area (At a Glance)
| Duxbury Area | Common ADU Issue | BuildX Note |
|---|---|---|
| Duxbury center | Historic depth, septic, design review near the common | Title 5 plus design context near the John Alden House area drive decisions |
| Green Harbor | Coastal flood, septic, oyster and shellfish flats | FEMA Zone V or A plus wetland buffers dominate the design |
| South Duxbury | Septic, Halls Corner area, closer to Kingston | Closest to MBTA adjacency; still septic and Title 5 first |
| Powder Point | Coastal high-hazard, historic, scenic | The most layered: engineer certification, design review, and Title 5 stack up |
| The Island Creek and Tremont Street area carries the new Multi-Family Overlay District (Section 440) adopted in June 2025 and is also where the Building Department sits. See the neighborhood card below for context. | ||
Duxbury center Septic Historic
Town Hall area, the town common, and the John Alden House neighborhood. Deep Pilgrim-era and shipbuilding-era historic character, with design review for visible work in some areas.
Flood risk: Low to moderate, depending on proximity to the bay.
Green Harbor Septic Coastal flood
Coastal northern Duxbury, oyster and shellfish flats. FEMA Zone V and A are common, and wetland buffers along the flats are a routine factor.
Flood risk: High. Engineer-stamped flood compliance likely.
South Duxbury Septic Near transit
Halls Corner shopping district and coastal southern Duxbury. The GATRA SAIL bus stops at Halls Corner, and this is the part of town closest to Kingston Station.
Flood risk: Moderate near the coast.
Island Creek / Tremont Street Overlay
Site of the new Multi-Family Overlay District (Section 440) adopted at the June 16, 2025 Town Meeting, and the location of Municipal Services and the Building Department.
Flood risk: Varies by parcel; check the FEMA map.
Powder Point Septic Very high
Coastal headland with significant historic, scenic, and flood concerns. The most regulatory complexity in town: engineer certification, design review, and Title 5 often all apply on the same project.
Flood risk: Very high. Project cost premium 15% to 25%.
Duxbury Building Department
Duxbury Building Department
- Address878 Tremont Street, Duxbury, MA 02332 (Municipal Services, 2nd floor)
- Phone(781) 934-1100 ext. 6002 (main); ext. 5481 (Building Commissioner direct)
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Hours
Monday8:00 AM to 7:00 PMTuesday8:00 AM to 4:00 PMWednesday8:00 AM to 4:00 PMThursday8:00 AM to 4:00 PMFridayClosed to the public
- Building CommissionerJames B. Wasielewski [Building Dept] (direct ext. 5481)
- Electrical inspection windowMonday to Friday, 3:30 to 4:00 PM drop-in
- PermitsPicked up in person at Municipal Services, 2nd floor. The physical permit must be on site before work starts.
- Building Departmenttown.duxbury.ma.us/building-department
- Assessor databasetown.duxbury.ma.us/assessor
Monday extended hours until 7 PM are useful for working homeowners. The Friday in-person closure took effect July 1, 2025. The Zoning Board of Appeals is reachable at ext. 5491.
Questions to ask when you call Duxbury
- Is my parcel in a district that allows a single-family detached dwelling, and therefore an ADU under Section 410.6?
- My lot is non-conforming. Does Section 401.2(6) let me add an ADU without a special permit?
- Will Title 5 septic capacity be reviewed before or after the building permit?
- Is my parcel in a FEMA flood zone, a historic or design-review area, or a wetland buffer?
- What are the lot, frontage, coverage, and height numbers for my district?
- Am I in a Cluster or Planned Development that triggers Design Review Board and HOA review?
Explore Duxbury ADU Topics
Jump to deep-dive sections on this page.
Duxbury ADU FAQs
Can I build a detached ADU in Duxbury?
Yes, by-right. Duxbury adopted its Protected Use ADU bylaw (Section 410.6) at the June 16, 2025 Special Town Meeting (Article 2), and the same meeting added the non-conforming-lot exemption (Section 401.2(6), Article 3). Detached, attached, and interior-conversion ADUs are all allowed by-right on single-family lots up to 900 sq ft or 50% of the principal dwelling, whichever is smaller. All Duxbury ADUs go through Planning Board Site Plan Review.
Will I need to upgrade my septic system?
Possibly, and this is the major cost wildcard for a Duxbury ADU. Duxbury has no town-wide residential sewer; almost every home is on private septic governed by Title 5 (310 CMR 15.000). The new ADU bedroom counts into your system's permitted capacity. If your existing system has available capacity you may tie the ADU in; if not, you must design a new or upgraded system. Budget $30,000 to $60,000 for a Title 5 upgrade if one is needed, sometimes more on a difficult site. Always order a Title 5 inspection first, before design fees.
My Duxbury lot is non-conforming. Can I still add an ADU?
Yes, and Duxbury made this specifically easier. Article 3 of the June 16, 2025 Special Town Meeting added Section 401.2(6), an ADU exemption for non-conforming structures. Previously almost any change to a non-conforming single-family home required a special permit; the new provision removes that requirement specifically for ADU additions [Duxbury Clipper, May 2025]. Confirm how it applies to your specific lot with the Building Department.
Can I Airbnb my Duxbury ADU?
No. Duxbury's adopted bylaw (Section 410.6) explicitly prohibits using an ADU as a short-term rental as defined by MGL c. 64G [Duxbury Clipper, May 2025]. State law allows local short-term-rental restrictions, so Duxbury's prohibition is enforceable. Long-term rentals of 30 days or more, in-law occupancy, multi-generational use, and aging-in-place are all permitted.
How big can a Duxbury ADU be?
Up to 900 square feet, or up to 50% of the principal home's gross floor area, whichever is smaller. This matches the state by-right cap under 760 CMR 71.00, so Duxbury's local rule and state law align on size.
Do cranberry bogs or wetlands affect my Duxbury ADU?
They might. Duxbury is the sixth-largest cranberry producer in Massachusetts and has many active and former bogs, oyster beds, tidal creeks, and rivers. A lot adjacent to any of these triggers a Notice of Intent with the Duxbury Conservation Commission under the Wetlands Protection Act, which adds roughly 6 to 10 weeks but is routine for a competent design team. Many "rural" Duxbury lots have wetland adjacency owners do not realize, so pull your parcel's wetland map before designing.
What is the typical permit timeline for a Duxbury ADU?
Plan for roughly 90 to 180 days from Title 5 inspection to issued building permit on a non-overlay parcel, and 120 to 240 days for a wetland-adjacent lot or a Cluster or Planned Development. The sequence: Title 5 inspection first, then Planning Board Site Plan Review (30 to 60 days), then a Conservation Commission Notice of Intent if you are within 100 ft of a wetland (6 to 10 weeks), then the building permit. Best windows to reach the Building Department: Monday before 7 PM or Tuesday through Thursday daytime; Friday is closed to the public.
Who do I call about building an ADU in Duxbury?
For official town process questions (permits, fees, inspector availability, building code interpretation, Site Plan Review), call the Duxbury Building Department at (781) 934-1100 ext. 6002.
For parcel-level feasibility, septic strategy, cost estimates, design options, and construction planning, call BuildX at (781) 627-7000.
They are different conversations. The town can tell you what is administratively required. BuildX can tell you what is realistic on your specific Duxbury parcel, starting with septic, and what it will actually cost to build.
Sources Reviewed
Last verified: September 12, 2026. Grouped by source type so you can see which claims come from town law, state law, town process, local constraints, and media records.
View all 18 sources, grouped
- Town of Duxbury. June 16, 2025 Special Town Meeting, Article 1 (MBTA Communities Multi-Family Overlay District, Section 440). Adopted at the same Special Town Meeting as the ADU articles.
- Town of Duxbury. June 2025 Special Town Meeting Information (Planning Board). Covers Article 2 (ADU bylaw Section 410.6) and Article 3 (Nonconforming Structures Section 401.2(6) ADU exemption).
- Commonwealth of Massachusetts. Accessory Dwelling Units (760 CMR 71.00). Protected-use ADU regulations, effective February 2, 2025.
- Massachusetts General Laws. M.G.L. Chapter 40A, Section 3. Zoning Act as amended by the Affordable Homes Act.
- Town of Duxbury. Duxbury Building Department. Building Commissioner James B. Wasielewski (ext. 5481); main line (781) 934-1100 ext. 6002.
- Town of Duxbury. Municipal Services. 878 Tremont Street; Building Department on the 2nd floor.
- Town of Duxbury. Duxbury Planning Board. Sponsor of the ADU articles; conducts Site Plan Review for ADUs.
- Town of Duxbury. Cluster and Planned Developments (Zoning Board of Appeals). Design Review Board and HOA review steps.
- MBTA. Kingston/Plymouth Line, Kingston Station. Closest commuter rail station to Duxbury; Duxbury is an MBTA adjacent community.
- Wikipedia. Duxbury, Massachusetts. Population, area, history, geography, transit (general reference; verified against primary sources).
- U.S. Census Bureau / hometownlocator. Duxbury town profile. Coordinates and town profile.
- Massachusetts Demographics. Duxbury demographics. 2025 projected population and median household income.
- Duxbury Clipper. New accessory dwelling unit law considered. October 2024. Planning Board's first formal consideration of an ADU bylaw.
- Duxbury Clipper. First peek at STM. May 21, 2025. Ten-article warrant; Article 2 replaces the old provision with Section 410.6, Site Plan Review required, short-term rentals prohibited; Article 3 adds the Section 401.2(6) non-conforming-structures ADU exemption.
- Duxbury Clipper. Dwelling units on the agenda. May 27, 2025. Interim Planning Director confirms the bylaw template, the 900 sq ft cap or 50% of the principal dwelling, the short-term-rental prohibition, and the Title 5 capacity requirement.
- Duxbury Clipper. Selectboard votes to support MBTA bylaw. June 11, 2025. Coverage of the Multi-Family Overlay support vote ahead of the Special Town Meeting.
- Duxbury Clipper. Legal Notices, Public Hearing Notice. Public Hearing Notice for the May 12, 2025 Planning Board hearing on the ADU bylaw, the non-conforming exemption, and the Multi-Family Overlay.
- Alexis B. Levitt Law Office. ADUs and the Estate Planning Attorney. Documents the Duxbury Senior Center ADU education event held October 14, 2025.
Nearby South Shore ADU Rules
Duxbury borders Kingston to the southwest (location of the Kingston commuter rail station), Marshfield to the north, Pembroke to the west, and Plymouth to the southeast. All four are BuildX home territory.
ADU Rules by City in the BuildX Service Area
BuildX serves 40 towns across four areas of southeastern Massachusetts. Each city has its own ADU bylaw, sewer or septic split, overlay map, and Building Department contact. Jump to the rules for your town:
South Shore (22)
South Coast (9)
Bridgewater Area (5)
Thinking about an ADU in Duxbury?
BuildX can review your Duxbury parcel for septic capacity, FEMA flood zone, wetlands and cranberry-bog adjacency, historic district status, and zoning before you spend money on design or permitting. Duxbury is BuildX home territory, so we know the Title 5 conversation that drives the project and the Site Plan Review path the town requires.
See our ADU project portfolio or visit the ADU Home TourDisclaimer: The information on this page is drawn from live interviews, podcast episodes, municipal bylaws, planning board materials, town websites, and other publicly available sources, and reflects what was accurate as of the original recording or verification date. Pricing, timelines, materials, regulations, zoning rules, permit processes, fees, and overlay district boundaries can change -- sometimes without public notice -- and no two towns interpret or apply the rules the same way. This page is for informational purposes only and should not be relied upon as the basis for any purchasing, construction, or investment decision. BuildX makes no guarantee that the information is current or complete for your specific parcel. Before making any decisions, contact the town directly or call BuildX at (781) 627-7000 or schedule a Project Clarity Call to review your specific situation.