Bolthole Index

Washington County, Rhode Island

Building permits, zoning and septic rules in the Town of Westerly, Rhode Island

Building work in the Town of Westerly, Rhode Island needs a permit from the town's own building office, and permits for single-family dwellings, garages, decks, sheds and pools need zoning approval first1. Westerly adopts and administers its own zoning chapter2. Septic permits for Westerly come from the state Department of Environmental Management, not the town3.

At a glance

Building permit
Required; issued by the Westerly building office1
Zoning
Westerly's own zoning chapter (Chapter 260)2
Building code
Rhode Island State Building Code, adopted by the town4
Septic permits
Rhode Island DEM, statewide OWTS program3
Permit fee
Valuation-based, $50 minimum5
Applications
Submitted online6
Owner-builder
Available on a single-family home you will occupy; a permit and inspection still apply7

Who to call

Building permits

Town of Westerly Building Office

Building, electrical, plumbing, mechanical and demolition permits and inspections inside the Town of Westerly

401-348-2547

45 Broad Street Westerly, RI 02891

Septic permits

Rhode Island DEM, Office of Water Resources, OWTS Program

Onsite wastewater treatment system (septic) permits, site evaluations and inspections statewide, including Westerly

(401) 222-3961

[email protected]

235 Promenade Street, Providence, RI 02908-5767

Contact details are copied from each office’s official page and were checked against it on October 14, 2026.

Off-grid gear

Going off-grid in Town of Westerly means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Westerly, Rhode Island?

Yes. Building work inside the Town of Westerly requires a permit, and the town issues it through its own building office1. Rhode Island's State Building Code is the code the town enforces, and the town adopted it as its building code4. State law requires an application in writing to the building official before work begins; only ordinary repairs that involve no code violation are exempt8.

The town's building office issues building, electrical, plumbing, mechanical and demolition permits9. Starting work before the permit adds a late filing fee1.

Who issues building permits in Westerly and how do you reach them?

The Westerly Building Office, in the lower level of Town Hall at 45 Broad Street, handles building permits for the town9. Its phone number is 401-348-25479. Permit applications are submitted online, not on paper at the counter6.

Fees are based on the value of the work: $10 per $1,000 up to $10,000, then $100 plus $8 per $1,000 over $10,000 up to $50,000, then $420 plus $6 per $1,000 over $50,000, with a $50 minimum5. The building office page also lists a $10 e-permit fee and a state levy fee5. Inspections are scheduled by phone with the building office, not by email10.

Does Westerly have zoning, and what does it mean for your lot?

Yes. The Town of Westerly adopts and administers its own zoning in Chapter 260 of the town code, run by the zoning official, planning board and zoning board of review2. Washington County has no county zoning of its own; Rhode Island has no county government structure11.

The code divides the town into zoning districts, and a use table and zoning map set what is allowed in each12. Setbacks, lot size and permitted uses depend on your parcel's district, so find the district before you buy. Dividing a lot is regulated too: Chapter 260 covers development plan review, land development projects and subdivision of lots13. Where state law allows an accessory dwelling, one is allowed by right per lot in specific cases, including a residential lot of at least 20,000 square feet14.

How do septic permits work in Westerly?

Septic permits for Westerly are state permits. The Rhode Island Department of Environmental Management runs the statewide septic (onsite wastewater treatment system) permitting program3. Nobody may install, alter or repair a system without the DEM Director's written approval of the plans first15, and DEM staff inspect at key stages of siting and installation16.

The town does not issue septic permits, but local building officials may have additional building-permit requirements for the same project3. We could not confirm whether Westerly's sewer service reaches a particular address; ask the town building office or DEM's OWTS program at (401) 222-396117. Composting-toilet and holding-tank arrangements are limited to specific cases and are not blanket approval for off-grid sanitation18.

Can you live in an RV or tiny home on your land in Westerly?

We could not confirm Westerly's rules for living in an RV or a tiny home on private land. Ask the Westerly Building Office at 401-348-2547 and the zoning official before you buy or park anything9.

The state's camping statute covers recreational vehicle parks and campgrounds; it does not answer whether you can live in an RV on your own lot, and municipal zoning and location controls still apply19. Manufactured homes are regulated through the state building-code system20. Westerly's town code has a separate chapter on mobile home and trailer parks, which we did not read, so confirm with the town.

Building a home in Westerly: the steps, in order

  1. Find the zoning district and dimensional rules for your parcel with the town zoning official12.
  2. Get septic approval from Rhode Island DEM before building; the state's own process reviews system plans before a building permit is issued21.
  3. If the lot is near wetlands, a floodplain or storm-flowage areas, check for state approval from DEM22.
  4. If the driveway meets a state highway, get a RIDOT Physical Alteration Permit first23.
  5. Get zoning approval, then apply online for the building permit1.
  6. Call the building office to schedule inspections as work proceeds10.
  7. Obtain a certificate of use and occupancy before anyone moves in24.

What stays with Washington County, and what should you check before you buy in Westerly?

Rhode Island has no county government, so the town and the state decide nearly everything about a Westerly lot11. Our Washington County page covers the other towns in the county.

Wells: new private wells need a licensed Rhode Island well driller, a completion report filed with the Department of Health within 10 days, and possibly a municipal permit, so check with the town first25. A home on a private well also needs water-test documentation before a certificate of occupancy24.

Taxes: Washington County's effective property tax rate is about26% of value, with a median bill of $4,954 a year27.

Watch-outs

  • Some building permits, including single-family dwellings, garages, decks, sheds and pools, need zoning approval before the building office will issue them1.
  • Septic approval is a state permit, separate from the town's building permit; start with the DEM OWTS program at (401) 222-396117.
  • We could not confirm Westerly's rules on RVs, tiny homes, private wells, floodplain development or short-term rentals; ask the Westerly Building Office at 401-348-25479.
  • Rhode Island requires state registration of short-term rentals advertised on a hosting platform, and a town may add its own registration28.

Sources

  1. Town of Westerly Code, Chapter 90 Building Construction, Article I State Building Code (eCode360) (Town of Westerly), quoted and re-checked
  2. Town of Westerly Code, Chapter 260 Zoning (eCode360) (Town of Westerly), quoted and re-checked
  3. Onsite Wastewater Treatment Systems (OWTS), quoted and re-checked
  4. Town of Westerly Code, Chapter 90 Building Construction, Article I State Building Code (eCode360) (Town of Westerly), quoted and re-checked
  5. Town of Westerly Code, Chapter 90 Building Construction, Article I State Building Code (eCode360) (Town of Westerly), quoted and re-checked
  6. Westerly Building Office (Town of Westerly), quoted and re-checked
  7. R.I. Gen. Laws § 23-27.3-113.3.2 — Applications for work requiring registered workers (2026 county census)
  8. R.I. Gen. Laws § 23-27.3-113.1 — When permit is required, quoted and re-checked
  9. Town of Westerly Building Office (westerlyri.gov)
  10. Westerly Building Office (Town of Westerly), quoted and re-checked
  11. State of Rhode Island and Providence Plantations, quoted and re-checked
  12. Town of Westerly Code, Chapter 260 Zoning (eCode360) (Town of Westerly), quoted and re-checked
  13. Town of Westerly Code, Chapter 260 Zoning (eCode360) (Town of Westerly), quoted and re-checked
  14. webserver.rilegislature.gov, quoted and re-checked
  15. Rules Establishing Minimum Standards Relating to Location, Design, Construction and Maintenance of Onsite Wastewater Treatment Systems, quoted and re-checked
  16. Onsite Wastewater Treatment Systems (OWTS), quoted and re-checked
  17. Rhode Island DEM, Office of Water Resources, OWTS Program (dem.ri.gov)
  18. OWTS Guidance for Repairs in Critical Erosion Areas, quoted and re-checked
  19. webserver.rilegislature.gov (Rhode Island statewide rule), quoted and re-checked
  20. RISBC-1 Rhode Island Building Code (Rhode Island statewide rule), quoted and re-checked
  21. RIDEM Septic & Onsite Wastewater Treatment Systems (2026 county census)
  22. Rules and Regulations Governing the Administration and Enforcement of the Freshwater Wetlands Act, quoted and re-checked
  23. State Highway Right-of-Way Regulations, quoted and re-checked
  24. R.I. Gen. Laws § 23-27.3-120.1 — New buildings, quoted and re-checked
  25. Private Well Care, Repairs, and Construction, quoted and re-checked
  26. Effective property tax rate: Bolthole Index county data
  27. Median property tax bill: Bolthole Index county data
  28. Short-Term Rentals Frequently Asked Questions, quoted and re-checked

Written October 14, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Answers from the rulebook for Town of Westerly

Town of Westerly’s own rules

  • Building permitRequired

    Building work inside Westerly town

    • Some building permits (single-family dwellings, garages, decks, sheds, pools) require zoning approval before issuance
    • Late filing fee if work starts before the permit
    “permit types are building, electrical, plumbing, mechanical, and demolition. there are some types of building permits that require zoning approval before being issued such as single-family dwellings, garages, decks, sheds and pools.”
  • Building code adoptedAdopted

    Construction inside Westerly town

    • Town adopts the Rhode Island State Building Code and the State Property Maintenance Code
    • Town fine of $50 per day per violation of the property maintenance code
    “§ 90-2 adoption of state building code. [amended 6-4-2018 by ch. no. 1917] a. the state building code is hereby adopted as the building code for the town.”
  • InspectionsRequired

    Permitted construction inside Westerly town

    • Inspections scheduled by phone with the building office, not email
    “in order to ensure that no violations exist, routine, daily, on site inspections are made while work is in progress.”
  • Local zoningPresent

    Land inside Westerly town; the town adopts and administers its own zoning chapter

    • Administered by zoning official, planning board and zoning board of review per chapter 260 articles VI-VIII
    “chapter 260 zoning [history: adopted by the town council of the town of westerly 10-16-1998 by ch. no. 1242; readopted 5-12-2003 by ch. no. 1439. amendments noted where applicable.]”
  • Zoning districtsPublished

    Zoning districts inside Westerly town

    • Zoning district use tables (Attachment 11) and zoning map exist as attachments
    “article iii district regulations and maps § 260-10 division into districts. § 260-11 zoning district boundaries. § 260-12 zoning districts.”
  • Subdividing landRegulated (with conditions)

    Subdivision of land inside Westerly town

    • Separate appendix chapter A261 land development and subdivision regulations exists but was not read
    “§ 260-45 development plan review. § 260-45.1 land development projects. § 260-45.2 subdivision of lots or parcels of land. § 260-45.3 unified development review.”
  • Permit feesPublished

    Building permit fees inside Westerly town

    • Valuation-based: $1-$10,000 at $10 per $1,000; $10,001-$50,000 $100 + $8 per $1,000 over $10k; $50,001+ $420 + $6 per $1,000 over $50k; $50 minimum
    • Late filing fee if work starts before permit
    • Building office page also lists a $10 e-permit fee and a state levy fee

    minimum building permit fee: >= 50 USD

    “§ 90-4 fees. [amended 8-26-2024 by ch. no. 2065] a schedule of fees for all permits necessary in compliance with the building code is hereby established as follows”
  • Permit processPublished

    Building permits inside Westerly town

    • Applications are submitted online
    • Some permits need zoning approval first
    “all permit applications are submitted online.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Town of Westerly or Washington County directly.

  • Owner-builder exemption — Owner-builders inside Westerly town
  • Certificate of occupancy — Occupancy of new buildings inside Westerly town
  • Minimum dwelling size — Dwellings inside Westerly town
  • Camping on your land — Temporary camping inside Westerly town
  • Tiny homes — Tiny homes inside Westerly town
11 more unanswered
  • Manufactured homes
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Driveway access
  • Building in a floodplain
  • Short-term rentals

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 Westerly publishes no rule on the point, not that none exists. Washington County’s page lists the county offices to call.

← All of Washington County: county rules, score and offices