Riverhead, New York

The owner of record and full market value of all 16,487 parcels in the Town of Riverhead, the Suffolk County seat on Long Island's East End, are free in New York State's open assessment-roll data; sale prices are reported on Form RP-5217 with each deed at the Suffolk County Clerk and published on the State's Sales Web.

9 buildings · 9 with an owner established · 12 sources · 4 tier B · 5 tier A · prepared 2026-11-03

Can you find out who owns it?

New York records title by deed. Deeds for land in the Town of Riverhead are recorded with the Suffolk County Clerk, and the sale price is reported on State Form RP-5217, filed with each deed and published for ten years on the State's Sales Web. In Suffolk County the Town Assessor values every parcel, and the State publishes each final roll as open data: owner of record, mailing address, property class and full market value for every parcel (16,487 on the 2025 roll, $13.95B full market value). Where the Town's Industrial Development Agency holds title under a tax deal, the roll names the agency, not the business. The State transfer tax is $2 per $500 of consideration.

Is ownership public?An open dataset names the owner
Cost of one title searchOwner of record free (NYS ORPTS 'Property Assessment Data from Local Assessment Rolls' on data.ny.gov). Suffolk County Clerk deed-search fees not read: suffolkcountyny.gov robots.txt disallows ClaudeBot and anthropic-ai
Bulk ownership dataNYS Department of Taxation and Finance (ORPTS), 'Property Assessment Data from Local Assessment Rolls' (data.ny.gov 7vem-aaz7), 2025 final roll for SWIS 473000, free API and download, owner names and mailing address included
Sale pricesEvery sale, with its address
1

The marquee buildings

The towers that set the tone of the core, and who holds them. A price is the price a document states, on the date it states — not an estimate of what the building is worth now.

BuildingUseOwner Owner typeLast price paid
Peconic Bay Medical Center
1 Heroes Way, Riverhead
Institutional Central Suffolk Hospital
The 2025 roll lists parcel 108.-3-22.1 (class 641 Hospitals) to Central Suffolk Hospital at full market value $333,264,706, the highest-valued parcel in the town; its parking lot (108.-3-17.1) is $612,745. A second hospital-class parcel at 1225 Ostrander Ave (82.-3-6, $44.1M) is held by Central Suffolk Hospital Fndn. The State Health Department lists Peconic Bay Medical Center (facility 938) with operator Central Suffolk Hospital and co-operator Northwell Healthcare, Inc., a not-for-profit corporation (s8).
Institution —B
Tanger Outlets Riverhead
1947 Old Country Rd (roll address), Riverhead
729,377 sq ft
Retail Tanger Properties LP
100% legal ownership (leasehold on ground lease)
Roll parcel 119.-1-38.1 (class 451 Regional Shopping Centers) is listed to Tanger Properties LP, Greensboro NC, full market value $176,807,598. Tanger's 2025 10-K (s5) lists the centre at 729,377 sq ft, 98.4% occupied, 100% legal ownership, and states it sits on a 47.0-acre ground lease expiring 2029, or 2039 with renewal options; Schedule III gross carrying amount $198.4M, built 1993. The ground lessor is not named in the filing.
REIT —A
Enterprise Park at Calverton (EPCAL) / Calverton Executive Airpark
4725 Middle Country Rd, Calverton
Land Town of Riverhead Community Development Agency
Roll parcel 135.-1-7.33 (class 700 Industrial) is listed to Community Dev Agency, full market value $134,857,843. The Town's EPCAL page (s10) says the CDA owns approximately 2,100 acres at EPCAL and records a 2018 agreement to sell ~1,643 acres to Calverton Aviation and Technology LLC. Wikipedia (s9): former Navy Grumman plant; 2,640 acres donated to Riverhead in 1998, 2,935 acres to NYS DEC. Search results (not opened) report the Town Board cancelled the $40M CAT contract in October 2023; that is not relied on here.
Government —A
Suffolk County government complex, Griffing Avenue
225 Griffing Ave, Riverhead
Civic County of Suffolk
Riverhead is the Suffolk County seat. Roll parcel 128.-3-25 (class 650 Government) is listed to County Of Suffolk at full market value $147,058,824, with adjoining County parcels at 211-219 Griffing Ave ($23.3M, Government), 137 Griffing Ave ($16.7M, Office Building) and 423 Griffing Ave ($8.1M, Office Building). The roll does not name the buildings.
Government —A
Riverhead Town Hall
4-6 W Second St, Riverhead
Civic Town of Riverhead
The Town's website gives its address as 4 West Second Street (s10 footer). Roll parcel 128.-5-9.1 (class 464 Office Building) at 4-6 Second St is listed to Town of Riverhead, deed book 12722 page 47, full market value $16,318,627, with a Town parking lot on Second St. The Town also still holds 200 Howell Ave (127.-5-28.2, class 650 Government, $10.4M) and 201 Howell Ave. The roll gives the class, not the building's name.
Government —B
Long Island Aquarium and Exhibition Center
431 E Main St, Riverhead
Mixed use Town of Riverhead Industrial Development Agency
Roll parcel 129.-4-21.3 (class 514 Auditoriums, Exhibition and Exposition Halls) at 431 Main St is listed to Town Of Riverhead IDA, full market value $65,438,725. In New York an IDA takes title while a project holds a tax deal, so the operator is not on the roll. Wikipedia (s11): the Town bought the land in 1995; the aquarium opened in 2000 at a $15M privately funded cost, with a $24M Exhibition Center expansion in 2011.
Government —A
Riverhead Centre
1550 Old Country Rd, Riverhead
Retail Riverhead Centre Owners LLC
Roll parcel 101.-2-11.1 (class 454 Large Retail Food Stores) is listed to Riverhead Centre Owners LLC, mailing address New York NY, deed book 13199 page 319, full market value $87,234,069, the third-highest commercial parcel in the town. The members of the LLC are not on the roll.
Private company —A
The Shops at Riverhead
1732-1762 Old Country Rd, Riverhead
Retail Brixmor Riverhead Dev LLC
Roll parcel 101.1-1-8.1 (class 453 Large Retail Outlets) is listed to Brixmor Riverhead Dev LLC, full market value $36,914,216. Brixmor's 2025 10-K Schedule III (s6) lists The Shops at Riverhead, Riverhead NY, built 2018, gross carrying amount $42.6M; matching the roll parcel to the filed centre is by the entity name and the Old Country Rd corridor.
REIT —B
Splish Splash Waterpark
2549 Splish Splash Dr, Calverton
Land Realty Income Corp
Roll parcel 118.-1-4.1 (class 532 Amusement Parks) is listed to Realty Income Corp, full market value $36,764,706; Realty Income also holds 2605 Splish Splash Dr and 218-222 Main St. Wikipedia (s12): 96-acre park opened 1991, owned and operated by Palace Entertainment 1999-2025 and sold to Herschend in early 2025 — the operator, while the roll keeps the REIT as owner of the land.
REIT —B
2

The core land

The most valuable ground in the city, and what the public record says about it.

The highest values in Riverhead are institutional and retail, not downtown offices: the hospital, two school campuses and the County complex outrank every commercial parcel except Tanger. Full market value = assessment ÷ the State equalization rate (8.16% for 2025, s2).

Highest-valued parcel$333.3M
Peconic Bay Medical Center, 1 Heroes Way (Central Suffolk Hospital), 2025 roll full market value (s1).
Highest commercial parcel$176.8M
Tanger Outlets Riverhead, 1947 Old Country Rd (Tanger Properties LP), 2025 roll (s1).
Town total full market value$13.95B
16,487 parcels, 2025 final roll, SWIS 473000 (s1).
Equalization rate8.16%
2025 State equalization rate for the Town of Riverhead (2024: 8.34; 2023: 9.29) (s2).
3

Who owns the town

At this scale the significant owner is rarely a trust or a fund: it is one or two local holding companies, a family in its second or third generation, and often the land around the town rather than the buildings in it.

Counts and full market values are from the 2025 State roll for the Town of Riverhead (16,487 parcels); the roll carries no acreage, so acres appear only where another source states them. Public ownership is broad: the Town (516 parcels) and Suffolk County (561) are the largest holders by count, the County largely in parkland and preserved farmland, and the utility estate of LIPA and its predecessors is the largest by value. 645 parcels are agricultural, 268 of them classed 'Acquired Development Rights' — farms whose building rights were bought by the County or Town, leaving the farmland in private hands.

NameTypeParcels (2025 roll)
County of Suffolk
All name variants on the roll (County Of/of Suffolk, Parks/Rec Dept, Treasurer, Suffolk County IDA). Includes the Griffing Ave government complex ($147.1M), County parkland along the Peconic and Wading River-Manorville Rd, Indian Island golf course (661 Riverside Dr) and 10 parcels of acquired farmland development rights.
Government 561 parcels, $383.5M full market valueA
Town of Riverhead
Town of Riverhead plus parking, sewer, park and dump variants; 76 are residential vacant land. Separately the Town's Community Development Agency holds 2 parcels ($135.0M, the EPCAL tract; about 2,100 acres per the Town, s10) and the Town IDA 4 parcels ($147.2M) held under tax deals, among them the aquarium and a hotel at 2012-2038 Old Country Rd ($45.8M).
Government 516 parcels, $115.1M full market valueA
Long Island Power Authority and predecessor utility entities
Long Island Lighting Co (65 parcels, $172.2M), Long Island Power Auth (13, $212.9M), Keyspan Energy Corp (13, $67.2M), Marketspan/Keyspan gas entities (4). Separately Verizon New York Inc holds 28 parcels ($27.9M).
Government 95 parcels, $494.7M full market valueA
Riverhead Central School District and other school bodies
Riverhead CSD under several roll spellings (incl. 700 Harrison Ave, $251.2M, and 927 Griffing Ave, $147.1M), Boces (10 parcels) and Central Sch Dist No 1 (Shoreham-Wading River). Fire districts (Riverhead, Wading River, Jamesport) hold 12 parcels ($30.3M); Riverhead Water District 12 ($10.4M); sewer districts 11.
Government 18 parcels, $440.7M full market valueA
State of New York
State of New York, NYS DEC, NYS DOT, Office of Mental Retardation and Wildwood State Park (2 parcels, $67.0M at 790 Hulse Landing Rd). Wikipedia (s9) says 2,935 acres of the former Navy plant went to the Department of Environmental Conservation in 1998 for wildlife management.
Government 47 parcels, $184.7M full market value; DEC received 2,935 acres at Calverton (s9)B
United States of America
United States of America (6 parcels) and United States Postal Serv (2). The Navy's residual Calverton acreage is from Wikipedia (s9), not the roll.
Government 8 parcels, $7.4M full market value; Navy held 358 acres at Calverton as of Jan 2006 (s9)B
Long Island Rail Road Co
Right-of-way parcels listed to Long Island Railroad Co.
Government 24 parcels, $6.9M full market valueA
The Nature Conservancy
Mostly conservation land (21 parcels classed 314 rural vacant). Peconic Land Trust Inc and its Peconic Land II/IV/V LLCs hold 13 more ($17.1M).
Institution 36 parcels, $6.4MA
Hometown Glenwood Vlg LLC, Hometown Foxwood Vlg LLC, Hometown Thurms Est LLC
Three manufactured-home communities — Glenwood Village (1661 Old Country Rd, $88.5M), Foxwood Village (1407 Middle Rd, $65.5M) and Thurm's Estates (Fresh Pond Ave, $37.5M) — with Chicago mailing addresses (common parent not stated on the roll); the largest private residential holder in the town by value.
Private company 9 parcels, $191.5M full market valueA
Farmland entities
Largest entity holders of agricultural-class parcels on the roll; RD Pilesgrove (11), Manor Farms (5) and Lewin Holdings/Lewin Capital (9) hold parcels classed 'Acquired Development Rights', i.e. farmland whose development rights have been sold. 101 such parcels are held by individuals, who are not named.
Private company Lewin Holdings LLC 18 parcels ($13.5M), RD Pilesgrove LLC 13 ($6.7M), Crossroads Atlantic LLC 11 ($10.4M), Manor Farms LLC 10 ($5.9M), DeLalio Sod Farms LLC 8 ($19.3M), IBF Farm LLC 6 ($16.8M)A
5

Who builds the houses

New-home building in this market: the volume, and the firms behind it. Ownership of a builder matters as much as its volume — a private-equity platform and a family firm behave differently.

Riverhead has no national-builder subdivisions of scale on the 2025 roll and no single-family-rental platform: no entity holds more than about 17 houses. New-home supply comes from small local LLCs building out approved subdivisions, apartments downtown and on Route 58, and manufactured-home communities. Counts are roll parcels, not starts — no official per-builder figures exist for Suffolk County.

NameTypeParcels (2025 roll)
Baiting Hollow Dev Group LLC
Largest entity holder of residential lots in the town on the roll.
Developer 29 parcels (22 residential vacant lots, 6 houses), $12.4MA
Villas at Roanoke LLC
Subdivision lots, Wading River mailing address.
Developer 17 parcels (13 vacant lots), $2.4MA
Mastro Road LLC
Lots and houses on the 2025 roll.
Developer 12 parcels (8 residential vacant), $4.7MA
Rental housing owners
Largest class-411 apartment parcels: John Wesley Village (Middle Rd), 221 Main St, 1145 Middle Rd, 1355 Roanoke Ave and 805-843 Main St. Bagshaw Rentals Inc is the largest entity holder of houses (17 parcels, $6.8M).
Private company John Wesley Village LP / II LP $56.4M; Riverhead Apartments LLC $23.0M; Riverhead Landing Apts LP $20.6M; Fairfield at Rvhd LLC $19.0M; Riverhead Housing LP $14.1MA
Hometown Glenwood Vlg / Foxwood Vlg / Thurms Est LLCs
Glenwood Village, Foxwood Village and Thurm's Estates manufactured-home parks; see landowners.
Private company 3 communities, $191.5MA
6

Commercial landlords

The commercial side, counted separately from housing: who holds the office, retail and industrial floor area.

Retail on the Route 58 / Old Country Rd corridor is the town's commercial core. Listed REITs own several centres outright; most others sit in single-asset LLCs whose members are not on the roll. Values are 2025 full market value.

NameTypeHoldings
Tanger Inc. (Tanger Properties LP)
Tanger Outlets Riverhead, 100% legal ownership on a 47.0-acre ground lease expiring 2029 (2039 with renewals), 98.4% occupied at end-2025 (s5). Roll parcel 119.-1-38.1.
REIT 729,377 sq ft; roll $176.8MA
Brixmor Property Group (Brixmor Riverhead Dev LLC; Centro Heritge Roanoke Plz LLC)
The Shops at Riverhead (built 2018, $42.6M) and Roanoke Plaza (built 2002, $25.7M), both acquired Jun-2011 per the 10-K (s6). On the roll: Brixmor Riverhead Dev LLC, 1732-1762 Old Country Rd ($36.9M) and Centro Heritge Roanoke Plz LLC, 1080 Old Country Rd ($33.0M) — Centro being Brixmor's predecessor name; the roll-to-filing match is by name.
REIT 2 centres; gross carrying $68.3M (Schedule III)B
Regency Centers (Wading River Regency LLC)
Regency's 10-K (s7) lists 'Wading River' (built 2002, acquired 2021, 99K sq ft, 94.7% leased; King Kullen, CVS, Ace Hardware) and 50% of 'Riverhead Plaza' (13K sq ft). The roll lists Wading River Regency LLC at 6225-6277 Route 25A ($27.5M).
REIT 99K sq ft; roll $27.5MB
Hogan-Riverhead LLC
Roll parcel 118.-3-4 at 1770 Main St, class 451 Regional Shopping Centers, deed book 12726 page 3 — the second-highest-valued shopping centre parcel in the town.
Private company 1 parcel, $128.9MA
Riverhead Centre Owners LLC
1550 Old Country Rd, class 454; see marquee.
Private company 1 parcel, $87.2MA
Riverhead PGC LLC
20 parcels classed Large Retail Outlets at 743 & 767 Old Country Rd (largest $25.8M), Great Neck mailing address.
Private company 26 parcels, $42.8MA
Owner-occupier big boxes
Costco Wholesale Corp, 1766-1774 Old Country Rd; Lowe's Home Centers Inc, 1461 Old Country Rd. Also UB Riverhead I LLC (1880 Old Country Rd, $43.1M) and E End Commons Assocs LLC (565-605 Old Country Rd, $35.5M) — the members of these LLCs are not on the roll.
Public company Costco $44.6M; Lowe's $35.5MA
?

Looked for and not found

Claims this page would have made if a source could be opened. They are left out rather than guessed.

  • The Town Board's October 2023 cancellation of the $40M EPCAL sale to Calverton Aviation & Technology, and the later dismissal of most of CAT's claims, appear in search results only (eastendbeacon.com, News12, Riverhead News-Review not opened); the roll still lists the Community Development Agency as owner.
  • The ground lessor under Tanger Outlets Riverhead's 47-acre lease is not named in Tanger's 10-K; the roll lists Tanger Properties LP.
  • Owners behind single-asset LLCs (Hogan-Riverhead LLC, Riverhead Centre Owners LLC, UB Riverhead I LLC, Riverhead PGC LLC) are not on the roll; Suffolk County Clerk deeds could not be read (suffolkcountyny.gov robots disallows ClaudeBot).
  • No sale prices: the State's Sales Web (RP-5217) is behind a CAPTCHA and the County Clerk is blocked.
  • Acreage is absent from the State roll; acres given come only from the Town EPCAL page and Wikipedia.
  • Whether Regency's 50% 'Riverhead Plaza' is the UB Riverhead I LLC parcel at 1880 Old Country Rd is not established.
§

Sources

  1. Property Assessment Data from Local Assessment Rolls (2025 roll, Town of Riverhead, SWIS 473000): owner of record, mailing address, property class, full market value, deed book/page; 16,487 parcels, total full market value $13,947,947,293, read 1 Nov 2026 — NYS Department of Taxation and Finance, Office of Real Property Tax Services (data.ny.gov) · openA
  2. Equalization Rates: Beginning Rate Year 1954 (Town of Riverhead, SWIS 473000: 2025 rate 8.16, 2024 8.34, 2023 9.29) — NYS ORPTS (data.ny.gov) · openA
  3. ORPTS Municipal Data Portal: Sales Web 'includes 10 years of property sales and transfers for all of New York State, except New York City'; the buyer or seller files the deed and Form RP-5217 with the county clerk — NYS Department of Taxation and Finance · openA
  4. Real estate transfer tax: 'two dollars for each $500, or fractional part thereof, of consideration'; 1% mansion tax on residences — NYS Department of Taxation and Finance · openA
  5. Tanger Inc. Form 10-K for 2025: Tanger Outlets Riverhead, Riverhead NY, 100% legal ownership, 729,377 sq ft, 98.4% occupied; ground lease of 47.0 acres expiring 2029 (2039 with renewal options); Schedule III gross carrying amount $198.4M, built 1993 — Tanger Inc. via SEC EDGAR · openA
  6. Brixmor Property Group Form 10-K for 2025, Schedule III: Roanoke Plaza, Riverhead NY (built 2002, acquired Jun-11, gross carrying $25.7M); The Shops at Riverhead, Riverhead NY (built 2018, acquired Jun-11, gross carrying $42.6M) — Brixmor Property Group via SEC EDGAR · openA
  7. Regency Centers Form 10-K for 2025: 'Wading River' (NY), acquired 2021, built 2002, 99K sq ft GLA, 94.7% leased, anchors King Kullen, CVS, Ace Hardware; 'Riverhead Plaza' 50% owned, acquired 2023, 13K sq ft — Regency Centers Corp via SEC EDGAR · openA
  8. Health Facility General Information: Peconic Bay Medical Center (fac_id 938), 1 Heroes Way, Riverhead; operator Central Suffolk Hospital; co-operator Northwell Healthcare, Inc.; Not for Profit Corporation — New York State Department of Health (health.data.ny.gov vn5v-hh5r) · openA
  9. Calverton Executive Airpark (Enterprise Park at Calverton, EPCAL): owned by the Town of Riverhead; 2,921 acres; former Naval Weapons Industrial Reserve Plant; 2,640 acres donated to Riverhead in Sept 1998, 2,935 acres to NYS DEC; Navy still held 358 acres as of Jan 2006 — Wikipedia · openA
  10. EPCAL Development: resolutions for the Town of Riverhead Community Development Agency (CDA) to transfer title to 'all of the acreage CDA owns at ... EPCAL, comprising approximately 2,100 acres' to facilitate sale of ~1,643 acres to Calverton Aviation and Technology LLC under an agreement dated Nov 19, 2018 — Town of Riverhead · openA
  11. Long Island Aquarium (formerly Atlantis Marine World): opened June 15, 2000; the Town of Riverhead bought the land in 1995; original cost $15 million from private developers; $24 million expansion with Exhibition Center in 2011 — Wikipedia · openA
  12. Splish Splash Waterpark, Calverton: 96 acres; opened May 1991; owned and operated by Palace Entertainment 1999-2025; sold to Herschend in early 2025 — Wikipedia · openA