ADU rules in Bennington

Section 4.2(B) says flatly that accessory apartments "may be sited as attached, detached, or interior units," so a standalone backyard cottage stands on the same footing as a basement conversion. Section 4.2(A) allows one accessory apartment within or appurtenant to a single-family dwelling in any district, reviewed by the Administrative Officer, and Table 2.7 for the Residential Form-Based-Design area confirms that accessory apartments "are located in attached and detached dwelling units." A detached unit still has to clear the same Section 4.2 conditions: owner occupancy, one bedroom, a two-person occupancy cap, the size cap, one added parking space, use of the single-family dwelling's existing driveway, setbacks and coverage, and demonstrated wastewater capacity. The Rural Residential, Rural Conservation, and Agriculture district tables list Accessory Apartment as an administrative zoning-permit use; only the Institutional/Professional (IP) district routes it to the Development Review Board, and that district sends every use, including a plain single-family dwelling, to the Board. If you are converting an existing detached nonresidential building such as a barn or a garage, 24 V.S.A. § 4412(1)(E) adds that the conversion criteria may not be more restrictive than those used for a single-family dwelling without an ADU.

The same Section 4.2 covers attached and interior units, and Section 3.5(A)(4) (Equal Treatment of Housing) separately bars the regulations from excluding "accessory apartments (“dwelling units”) as defined under the Act, which are constructed within or attached to a single family dwelling, subject to the standards set forth in Section 4.2." A basement, attic, or addition conversion is therefore the safest path in Bennington: it is protected twice over, once by Section 4.2 and once by the equal-treatment clause. Article 10 defines an Accessory Apartment as a secondary dwelling unit established in conjunction with and clearly subordinate to a single-family dwelling and retained in common ownership. Only one accessory apartment is allowed per single-family dwelling.

Section 4.2(A)(3) caps the accessory apartment at 30 percent of the total existing living area of the single-family dwelling or 900 square feet, whichever is greater, so 900 sq ft is the floor for a typical Bennington house and larger houses earn more. Two conditions bite harder than the square footage: Section 4.2(A)(5) limits the unit to one bedroom, and Section 4.2(A)(2) restricts occupancy to not more than two persons. Neither "floor area" nor "existing living area" is defined in Article 10, so confirm the measurement basis with the Zoning Administrator before drawing plans. On the plus side, Section 4.2(C) exempts accessory apartments from lot-area-per-dwelling-unit requirements, and in the Residential Form-Based-Design area Table 2.7(C)(1) exempts them from the 30 percent maximum building coverage and from the minimum-lot-area-per-unit and minimum-footprint rules.

Bennington's bylaw still says yes: Section 4.2(A)(1) requires that "the owner shall reside on the property in either the primary or accessory dwelling unit," written as a standing condition of the use rather than a one-time test at application, and Section 4.2(D) reinforces it by requiring the zoning permit itself to state that the apartment is accessory to the principal residential use. State law no longer supports it. Until 2026 the statewide ADU mandate ran only to "a single-family dwelling on an owner-occupied lot," which gave towns cover for local owner-occupancy conditions, but Act 179 of 2026 (S.328), Sec. 9 struck that phrase from 24 V.S.A. § 4412(1)(E) effective July 1, 2026 while keeping the sentence that requires a single-family dwelling with an ADU to be subject to the same review, dimensional, or other controls as one without. An owner-occupancy condition imposed only because there is an ADU is exactly such an extra control, and § 4412 applies "Notwithstanding any existing bylaw," so the statute controls over the unamended LUDR. Expect to have to raise the statute at the counter, because Bennington has not amended Section 4.2 and its Planning Commission only restarted the LUDR text update in July 2026. If you do comply, either unit may be the owner's, so living in the ADU and renting the main house is fine.

Section 4.2(A)(4) conditions the accessory apartment on "one on-site parking space ... for the residents of the accessory apartment," and Table 3.2 (Required Off-Street Parking Spaces) lists "Dwelling, Accessory Apartment: 1 additional per dwelling unit" against 2 spaces for a single-family dwelling and 1.5 for two-family or multi-family. Section 3.10(B) requires the space to sit on the same lot as the use it serves unless the Development Review Board approves otherwise. Section 4.2(A)(6) adds a design condition that reads like a parking rule in practice: the accessory apartment must be served by the same vehicle access and driveway as the single-family dwelling, so no second curb cut. One space per ADU sits exactly at the ceiling that 24 V.S.A. § 4414(4) now imposes in districts served by municipal sewer and water that allow residential uses.

Section 4.2(A) allows one accessory apartment in any district "subject to review by the Administrative Officer," which is the ministerial zoning-permit track in Section 9.3: an application and sketch plan to the Zoning Administrator, a decision within 30 days (the permit is deemed issued on the 31st day if staff does not act), posting for 15 days, and effect only after the 15-day appeal window in Section 9.5 closes. No hearing, no Development Review Board, no conditional-use findings. Bennington issues zoning and building permits together for most residential work, so budget for both. The single exception in the district tables is the Institutional/Professional (IP) district, where Table 2.8 lists Accessory Apartment under DRB approval, but that district requires DRB approval for every use including a single-family dwelling.

Nothing in the LUDR forbids renting the accessory apartment, and the regulations never mention a minimum lease term, so a normal long-term tenancy is fine, subject to the two-person and one-bedroom limits and to the owner-occupancy condition that the LUDR still carries but that state law has preempted since July 1, 2026 (see that field). What the LUDR does control is ownership: Section 4.2(D) requires the zoning permit to state that the apartment is accessory to the principal residential use and "shall be retained in single ownership," and it may be subdivided or conveyed as a principal dwelling only if it meets every current municipal regulation for a two-family dwelling, including district density and dimensional standards. Bennington has no short-term rental ordinance and no rental registry: the town's Planning and Permitting FAQ answers the STR question by pointing owners to the Vermont Rental Housing Code and offering a code enforcement inspection, and the town Book of Ordinances contains no STR article (Article 6, Housing, Building and Life Safety, is a maintenance and habitability code with no registration or licensing scheme). State-level short-term rental obligations still apply on top.