ADU rules in East Providence

Detached ADUs are a permitted accessory use on any lot whose principal use is a legally established residential use, one ADU per lot, under Sec. 19-181 as rewritten by Ch. 944 (adopted 9-2-2025). Building a new detached ADU (or expanding a structure's footprint for one) requires a lot of at least 5,000 sq ft, far below the 20,000 sq ft lot the state statute guarantees by right; the council cut this from a proposed 7,500 sq ft. Converting an existing detached garage or accessory building within its footprint is allowed on any lot size, matching the state's existing-footprint circumstance in 45-24-73(a)(3). Following the Rhode Island directory convention, 'yes' is recorded because the city's own 5,000 sq ft gate sits well below the statutory 20,000 sq ft floor.

Internal and attached ADUs (a unit within, or added onto, the primary dwelling) are a permitted accessory use under Sec. 19-181(b)(1). A conversion inside the existing footprint of the house is allowed on any lot, as the state requires under 45-24-73(a)(3); an addition that expands the footprint to create the ADU needs a lot of at least 5,000 sq ft under Sec. 19-181(b)(2). ADUs are allowed with single-family and multifamily principal dwellings alike (Sec. 19-1 definition), and Sec. 19-139 exempts ADUs from the one-residential-structure-per-lot rule in the R-1 to R-4 and R-6 districts.

Sec. 19-181(b)(3) limits an ADU to two bedrooms and caps a two-bedroom unit at 1,200 sq ft or 60 percent of the principal dwelling's floor area, whichever is less. The studio and one-bedroom clause copies the state's floor language verbatim ("of at least 900 square feet, or 60 percent ... whichever is less"), so read literally it is a guaranteed minimum allowance rather than a cap; the evident intent and the state floor both point to 900 sq ft or 60 percent. These figures equal, and so meet, the minimum allowances in R.I. Gen. Laws 45-24-73(b)(1). For detached units, the Sec. 19-1 definition of accessory structure (no greater than 50 percent of the principal use's gross floor area) and the 20 ft accessory building height limit in Sec. 19-144(c) may also apply; the code does not say expressly how they interact with Sec. 19-181.

Neither Sec. 19-181 nor any other section of Chapter 19 requires the owner to live on the property; a Municode full-text search of the code for 'owner-occupied' finds only tax, foreclosure and live/work provisions. Ch. 944 (9-2-2025) repealed the old Sec. 19-202 accessory family dwelling unit regime, and the city's adoption release states that ADUs are not limited to family members. The only owner-occupancy test is voluntary: the ADU tax stabilization adopted as Ch. 971 on 7-7-2026 is open only to owner-occupied properties receiving the homestead exemption, and it ends on sale. That is a tax-incentive eligibility rule, not a zoning condition.

Sec. 19-181(b)(6) requires one additional off-street space, on the premises, when the ADU has more than one bedroom or when the property does not meet at least 50 percent of the minimum parking required for its existing use(s); otherwise no added space is required. The most the city can ever require is one space, which stays within the state cap of one space per ADU bedroom in R.I. Gen. Laws 45-24-73(b)(2)(viii). The city's Ch. 944 redline notes that the city chose this standard over the state maximum to limit impervious coverage.

An ADU is a permitted accessory use under Sec. 19-181(b)(1), so a conforming ADU needs only the zoning officer's zoning permit (Sec. 19-56) and a building permit, with no special use permit or board hearing. This matches R.I. Gen. Laws 45-24-37(e), which requires an administrative building permit process for ADUs in the statute's by-right circumstances, and the city extends the same ministerial path to detached units on lots of 5,000 sq ft or more. A project that fails a local standard (for example a new detached ADU on a lot under 5,000 sq ft) would need a dimensional variance from the zoning board of review.

R.I. Gen. Laws 45-24-73(b)(8) bars renting an ADU for tourist or transient use (occupancy under 30 consecutive days) or through a hosting platform, and the city's 2025 adoption release states that short-term rentals of ADUs are prohibited. Sec. 19-181 itself sets no tenant restriction, and state law bars family or age limits on ADU tenants. East Providence otherwise allows short-term rentals of dwelling units (stays under 28 days) in the R-1 to R-6, C-1 and C-2 districts with an annual temporary use permit under Sec. 19-103(b); that ordinance does not carve out ADUs, but the state bar controls for ADUs. Because the local definition stops at 28 days, a 28- or 29-day stay is outside the city regime but still transient use barred for ADUs by the statute.