ADU Pass
Warren
ADU Pass helps homeowners in Warren, Bristol County, Rhode Island navigate the permit paperwork for building an accessory dwelling unit. This area covers 1 ZIP code.
Map
ADU details
ADU legality: allowed
Warren explicitly forbids short-term rental use of an ADU as defined in state law — this is a notable Warren-specific constraint encoded directly in the new ordinance.
Cost scenarios
| Scenario | Sq ft | Permit | Build | Total |
|---|---|---|---|---|
| minimum | 150 | $2,300 | $46,950 | $49,250 |
| 600 | 600 | $2,300 | $187,800 | $190,100 |
| midpoint | 675 | $2,300 | $211,275 | $213,575 |
| maximum | 1,200 | $2,300 | $375,600 | $377,900 |
Fee breakdown (as of 2026-04)
Permitting process
Viability (permitted uses)
- Long-term rental: yes Long-term rental of an ADU is permitted by-right in the 9 qualifying zoning districts subject to the Section 32-133 Occupancy Restriction Agreement.
- Short-term rental: no Warren §§ 32-131 / 32-133 explicitly prohibit short-term rental use of an ADU as defined in state law. This is a Warren-specific zoning ban encoded directly in the ADU ordinance, beyond the general STR ordinance.
- Office rental: no ADUs are residential dwelling units only; commercial office rental is incompatible with the ADU classification.
- Home office: yes Standard home occupation use within the principal dwelling is permitted under Chapter 32.
- Studio / workshop: with-restrictions Owner-use studio space inside the ADU is fine; standalone studio rental to non-residents is not contemplated.
- Agriculture: with-restrictions Farm-conservation district excluded from ADU-eligible districts; limited urban agriculture permitted in residential districts.
- Relative support: yes Family-occupancy ADU permitted in the 9 ADU-eligible districts.
Incentives
Contacts
Utilities
- Water: Bristol County Water Authority (BCWA) · 21d connect · $4,500
BCWA serves Warren in addition to Bristol and Barrington from the Pawtucket interconnection. - Sewer: Town of Warren Wastewater Treatment Facility · 21d connect · $5,500
Warren operates its own wastewater plant on the Warren River. - Electric: Rhode Island Energy (PPL Corporation) · 14d connect · $1,800
- Gas: Rhode Island Energy (gas division) · 21d connect · $1,500
Property values & taxes
Construction timeline
Realistic total: best 7mo · typical 11mo · worst 16mo
Warren has a smaller historic-district footprint than Bristol; downtown Warren historic district adds review for visible exterior changes but most residential parcels are outside it.
Modular pathway inspectors are occasional with modular
Financing
Insurance impact
HOA prevalence & preemption
HOA penetration in Warren is very low — predominantly historic single-family and small multi-family stock without subdivision covenants. R.I.G.L. § 45-24-73 voids private-covenant ADU restrictions.
Regulatory overlays (3)
- coastal-commission
Warren River and Mt. Hope Bay frontage triggers Coastal Resources Management Council (CRMC) jurisdiction within 200 feet of coastal features. ADUs on coastal parcels require CRMC Assent. - flood-zone
Warren has FEMA Special Flood Hazard Areas along the Warren River and Mt. Hope Bay. Elevation certificates and flood-resistant construction required for SFHA parcels. - historic-district
Warren Waterfront Historic District (NRHP-listed downtown along Water Street, Main Street) triggers Historic District Commission review for visible exterior changes.
Technical envelope (climate & building code)
Climate & energy code
Building code
Amendments:
- Amendment
- Amendment
Legal history (timeline)
Current ordinance: Warren Code Chapter 32 (Zoning), Article XXIV — Accessory Dwelling Units, adopted 2026-01-13, last amended 2026-01-13
- 2024-06-25 — Rhode Island H 7062 / S 2998 signed by Governor McKee (state-law)
Statewide ADU enabling act amending R.I.G.L. § 45-24-37; mandates by-right ADU permitting on owner-occupied 1-3 family residential parcels.
Effect: Warren initiated Chapter 32 amendments to bring local code into compliance. - 2025-08-12 — Warren first-pass Chapter 32 amendments to reflect state ADU alterations (city-ordinance)
Warren Town Council adopted preliminary Chapter 32 amendments aligning local zoning with H 7062's by-right baseline. Planning Board flagged additional refinements needed.
Effect: Stop-gap conformance pending the comprehensive 2026 rewrite. - 2026-01-13 — Warren adopts revised ADU ordinance under Chapter 32 Article XXIV (city-ordinance)
Town Council adopted Planning Board recommendations rewriting §§ 32-47, 32-131 (ADUs by Right), and 32-133 (Occupancy Restriction Agreement). Establishes 1BR=900sf / 2BR=1200sf with 60%-of-principal cap; allows ADUs in 9 of 12 districts; adds explicit STR prohibition.
Effect: Comprehensive Warren-specific ADU framework operational; STR ban encoded in zoning rather than left to general STR ordinance.
Known issues (1)
- policy-review — Warren's outright STR prohibition for ADUs is novel and may face legal challenge. Investors planning STR-revenue-funded ADU should NOT rely on Warren as a viable jurisdiction.
Rhode Island state — ADU law and programs
State ADU law
Rhode Island enacted statewide ADU preemption in 2024 through H 7062 (chief sponsor Rep. June Speakman and colleagues; co-sponsored in the Senate as S 2710), which amended the Zoning Enabling Act (Title 45, Chapter 24). Municipalities must permit ADUs by-right on any lot containing a single-family dwelling, subject only to uniform minimum standards set by the statute. One of the most ADU-friendly state statutes in the country as of 2025.
- R.I.G.L. § 45-24-73 — Design standards required for accessory dwelling units; Consistent statewide treatment of accessory dwelling units required — Core ADU standards added by H 7062 (2024). Requires municipalities to permit ADUs by-right. Caps 1-bedroom and studio ADUs at 900 sqft or 60% of the principal dwelling's floor area, whichever is less. Caps 2-bedroom ADUs at 1,200 sqft or 60%, whichever is less. Prohibits owner-occupancy requirements. Caps additional parking at 1 off-street space per bedroom. Prohibits ADU-specific impact fees. Voids HOA, condominium, and similar private-covenant restrictions that conflict with the statute as against public policy.
- H 7062 (2024 RI General Assembly) — An Act Relating to Housing — Accessory Dwelling Units — The enacting bill. Also cited by municipalities adopting conforming ordinances (Providence 2024 Chapter 3584, East Providence 2024 ADU Ordinance, South Kingstown 2024-07-12 regulations).
State HOA preemption
R.I.G.L. § 45-24-73 explicitly voids homeowners' association, condominium association, or similar private-covenant restrictions on ADUs when those restrictions conflict with the statute's ADU minimums. The preemption is framed as a public-policy void, meaning the offending covenant is unenforceable rather than simply regulated. Pre-existing ADU-friendly covenants remain valid (the statute only void conflicting restrictions). Applies to all common-interest communities governed by the Rhode Island Condominium Act (R.I.G.L. Title 34, Chapter 36) and Rhode Island Condominium Ownership Act (Title 34, Chapter 36.1), as well as HOAs in planned-community subdivisions.
- R.I.G.L. § 45-24-73 (HOA preemption clause added by H 7062 (2024)) — Provides that private covenant restrictions imposed by condominium associations, homeowners' associations, or similar residential property governing bodies that conflict with the ADU provisions are void as against public policy. Drafted broadly — covers declarations, bylaws, rules and regulations, and recorded covenants.
State financing programs
RIHousing, the state's housing finance agency, operates an ADU financing program built around the FHA 203(k) loan product. Covers attached and interior ADUs for both purchase and refinance. Detached ADUs are NOT eligible. Requires mandatory homebuyer education, use of an FHA-approved 203(k) consultant, and a RI licensed and insured contractor. No state-specific grant program for ADUs is in effect as of 2026-04-21; the federal 203(k) rails are the production vehicle.
State housing programs
Rhode Island does not currently operate a single statewide pre-approved-ADU-plan catalog (as California's CalHFA and Washington's Commerce plan libraries). Implementation of the 2024 ADU law is happening municipality-by-municipality, with the Executive Office of Housing (EOH) coordinating technical assistance. Providence published a citywide ADU Guide (February 2025) as the leading model; East Providence adopted a conforming ordinance in 2024; South Kingstown published regulations in 2024. RIHousing runs the ADU financing side (see stateFinancing).
Federal (United States) — ADU-relevant rules and programs
Federal ADU law
The United States has no federal statute that directly regulates accessory dwelling unit entitlement or design. Land-use authority over ADUs resides with states and local governments under the traditional police power. Federal engagement is limited to financing (Fannie/Freddie/FHA/VA/USDA), flood insurance (FEMA/NFIP), and discretionary housing programs (HUD), which are recorded in sibling sections of this file.
Federal financing programs
Federal housing-finance agencies and GSEs set nationwide underwriting rules that govern whether an ADU can be financed, appraised, and counted toward mortgage qualifying income. The relevant actors are Fannie Mae, Freddie Mac, FHA (HUD), VA, and USDA Rural Development.
Federal tax credits
There is no ADU-specific federal tax credit. ADUs may incidentally qualify for existing federal energy-efficiency and clean-energy tax credits when the ADU construction includes qualifying measures.
Federal housing programs
HUD administers several discretionary programs that can fund ADU-related activity at the grantee's election, but none is an ADU-specific program.
ZIP Code
- 02885
Post Office
- 53 Child St, 02885