Bowmanville, Ontario
Bowmanville stopped being a town of its own on 1 January 1974, when Durham Region was created and it was folded into what is now the Municipality of Clarington; Canada's names authority still carries it as an unincorporated place and Durham Region's own open data lists it as a community of type "Town" whose municipality is Clarington. Clarington governs, assesses and bills it, and the two largest things on its shoreline are owned outright by named entities: Ontario Power Generation owns the four-reactor Darlington Nuclear Generating Station, and St Marys Cement, a division of Brazil's Votorantim Cimentos, owns the quarry and cement plant beside it and wants to mine under Lake Ontario for the next hundred years. Everything smaller runs into Ontario's $37.10 parcel register and an assessment roll nobody may read.
6 buildings · 5 with an owner established · 14 sources · 5 tier A · 1 tier B · prepared 2026-10-03
Bowmanville is a community inside the Municipality of Clarington and has not been a municipality since 1974. Natural Resources Canada's geographical names database records it in Durham with the concise code UNP — an unincorporated place — and the generic code 200, "a separately named area within the limits of an incorporated municipality", with a decision date of 1 January 1974; the same database gives Clarington a decision date of 1 July 1993, when the Town of Newcastle took its present name. Durham Region's own open data names Bowmanville a community of type "Town" in the municipality "Clarington", and the regional boundary layer calls that municipality the "Municipality of Clarington". Clarington files the Financial Information Return, MPAC assesses the parcels and Clarington and Durham Region levy the taxes; no Bowmanville figure exists in any published Ontario municipal finance. Ownership follows the provincial rule: ServiceOntario states the land registry "contains the official records of property ownership and other legal interests such as mortgages, transfers and leases", "covers more than 7.4 million parcels of land in the province", is "only available online", and that on OnLand "You can do a self-search for a fee" — $37.10 per parcel register from 2 November 2026. There is no bulk ownership extract at any price, Teraview is for licensed users only, MPAC's values are behind three log-in-only products and still pegged to 1 January 2016, and Ontario publishes no price-paid file.
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.
| Building | Use | Owner | Owner type | Last price paid |
|---|---|---|---|---|
| Darlington Nuclear Generating Station 1 Holt Road South, Bowmanville — on the Darlington lakeshore in the Municipality of Clarington 4 CANDU reactors, 3,512 MW installed capacity |
Industrial | Ontario Power Generation The Canadian Nuclear Safety Commission's facility page states it outright: "Ontario Power Generation (OPG) owns and is licensed to operate the Darlington Nuclear Generating Station (NGS). The station is in the municipality of Clarington, on the north shore of Lake Ontario." Licensee: Ontario Power Generation; four CANDU reactors; 3,512 MW; all four units operating refurbished; licence issued 1 December 2025 and expiring 30 November 2045. Its postal address is Bowmanville but the station sits on the Darlington shoreline several kilometres west of the built-up town, so it is a Clarington asset that Bowmanville addresses rather than a building inside the community. |
Government | —A |
| St Marys Cement Bowmanville plant and quarry 400 Waverly Road South, Bowmanville (Municipality of Clarington) |
Industrial | St Marys Cement, a division of Votorantim Cimentos St Marys Cement's project description for the Bowmanville Underground Expansion, filed with Ontario's mining ministry, opens: "St. Marys Cement (SMC), a division of Votorantim Cimentos, is proposing to construct and operate the Bowmanville Underground Expansion Project … to be located contiguous with SMC's existing licenced quarry area situated on the shore of Lake Ontario within the Municipality of Clarington." Its figure 1 draws the "ST. MARYS CEMENT PROPERTY BOUNDARY" beside the OPG Darlington station. The company's own history page states "In 2001, the Votorantim Cimentos Group purchased St Marys Cement". No acreage or price is published. |
Public company | —A |
| Lakeridge Health Bowmanville Hospital 47 Liberty Street South, Bowmanville (Municipality of Clarington) |
Institutional | Lakeridge Health Lakeridge Health's release of 1 October 2025 states that it and Infrastructure Ontario, with the Government of Ontario, issued the Request for Proposals "to redevelop the Bowmanville Hospital", a rebuild that "will more than double the size of the current hospital", with two shortlisted teams — Bowmanville Health Partners led by Amico Design Build and PCL Partnerships led by PCL Constructors Canada — and on-site construction expected to begin in late 2026. Tier B on ownership: the release names Lakeridge Health as the hospital corporation procuring and running the site but does not use the word "owns", and no parcel register was opened. No cost or floor area is stated. |
Institution | —B |
| Canadian Tire Bowmanville 2000 Green Road, Bowmanville (Municipality of Clarington) 125,981 sq ft |
Retail | CT Real Estate Investment Trust CT REIT's 2025 Annual Information Form lists 2000 Green Road, Bowmanville in its Single-Tenant Properties table: year built 2011, last renovated 2022, Canadian Tire GLA 125,981 sq ft, no third-party GLA, lease expiring 2038. The REIT held 378 properties and 31,709,453 sq ft of GLA at 31 December 2025, 92.1 per cent of it leased to Canadian Tire Corporation. No price or acquisition date is given for this property. |
REIT | —A |
| Bowmanville Small Craft Harbour Smart Avenue at Lake Ontario, Port Darlington, Bowmanville (Municipality of Clarington) 1.70 ha |
Land | Government of Canada (Fisheries and Oceans Canada) Directory of Federal Real Property, property 23043, custodian Fisheries and Oceans Canada, interest type Crown Owned, 1.6977 ha, no buildings. It is the only piece of Bowmanville itself that the federal government owns, and the only waterfront land in the community in a published ownership register. Fisheries and Oceans also holds the Graham Creek lamprey barrier dam elsewhere in Clarington under a Lease or Licence. |
Government | —A |
| Bowmanville post office and the RCMP office on Lake Road 136 King Street East and 422 Lake Road, Unit 1, Bowmanville (Municipality of Clarington) 160 m² and 269 m² |
Retail | Not established a paid title search would answer it Both appear in the Directory of Federal Real Property with interest type "Lease or Licence": "PO Bowmanville ON" at 136 King St E, Canada Post, 160 m² in one building, and an RCMP "Office Site" at 422 Lake Road Unit 1, 269 m². The register therefore establishes the inverse of ownership — Canada occupies both and owns neither — and names no landlord. Unlike the post offices in Orono and Hampton, which Canada Post owns outright, Bowmanville's is rented. Each landlord would cost $37.10 per PIN to establish. |
Private company | —A |
The core land
The most valuable ground in the city, and what the public record says about it.
Nothing financial here is Bowmanville's. The Financial Information Return is filed by the Municipality of Clarington, which covers 613 square kilometres and four other communities — Courtice, Newcastle Village, Orono and a long list of hamlets — and publishes no breakdown. The figures below are Clarington-wide ceilings, not Bowmanville measurements, and the one thing they do show cleanly is that Clarington's upper-tier levy to Durham Region is half as large again as the levy the municipality raises for itself. The federal numbers were matched on the register's own Municipality field ("Clarington") and its Metro Area field ("Oshawa"), and the Bowmanville-specific rows were then separated by street address and coordinate.
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.
Bowmanville's land ownership is dominated by its shoreline, and the shoreline is divided between two industrial owners and a 1.7-hectare federal harbour.
| Name | Type | Holdings |
|---|---|---|
| Ontario Power Generation and St Marys Cement The CNSC establishes OPG's ownership of the generating station and St Marys' own filing establishes that its licensed quarry is contiguous with it on the Lake Ontario shore in Clarington. Neither document states an acreage, and Ontario publishes no roll from which one could be taken, so no hectare figure is claimed for either. |
Government | the Darlington shoreline, in two blocksA |
| Atomic Energy of Canada Limited Directory of Federal Real Property: the Port Granby waste-management lands on Lakeshore Road and Elliott Road near Newtonville, all Crown Owned, 78.0 ha on Lot 3 alone with a 1,783 m² building. Listed here precisely because a municipality-level federal figure for Clarington is mostly this, and attributing it to Bowmanville would be wrong. |
Government | 249.2 ha across seven parcels in Clarington — none of it in BowmanvilleA |
| Every private holder in Bowmanville There is no concentration measure for the community. Clarington's $567 million of assessed farmland and $14.7 billion of assessed housing are published as totals with no holder attached. Ontario has no open roll, no price-paid file and no bulk ownership extract. |
Private company | not establishedA |
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.
Bowmanville is one of the clearest demonstrations in Ontario of how the builder register can be read as a map. The province licenses a separate company for each subdivision and publishes each one's possessions, and five of the ten largest Bowmanville licensees are registered at a single Toronto address — 220 Duncan Mill Road in Don Mills, the Kaitlin Group's office — which between them account for 667 homes on and behind the Port Darlington waterfront under the Lakebreeze name. Alongside them sit three other Greater Toronto platforms with Bowmanville project companies and a handful of genuinely local firms, two of which have been licensed since the 1970s. The usual caveat holds and is visible here: the directory gives the licensee's REGISTERED address, not where the homes were built. Figures are cumulative province-wide possessions.
| Name | Type | Total possessions (cumulative, Ontario) |
|---|---|---|
| The Kaitlin Group — Lakebreeze and Modo Four licensees at 220 Duncan Mill Road, Toronto: Bowmanville Lakebreeze West Village Ltd. (B44903) 234 freehold, Bowmanville Lakebreeze Towns Ltd. (B44906) 177 (97 freehold, 80 condominium), Bowmanville Lakebreeze East Village Ltd. (B44904) 153 condominium, and Modo Bowmanville Towns Ltd. (B47594) 103 freehold. The first three were licensed in October 2015, Modo in May 2019. Together they are the largest new-housing programme in Clarington and they sit on the Port Darlington waterfront. |
Private company | 667A |
| Averton Homes (Bowmanville) Inc. 214 freehold, account B44103, umbrella Averton Residential, licensed 17 November 2014, registered at 161 Pennsylvania Avenue, Concord. |
Private company | 214A |
| Bowmanville Estates Inc. (Esquire Homes) 193 freehold, account B41595, umbrella Esquire Homes, licensed 20 September 2011, registered at 145 Royal Crest Court, Markham. |
Private company | 193A |
| Van Andel Holdings Ltd. 42 freehold, account B4527, licensed 22 August 1985 and registered at 2184 Bloor Street, Bowmanville. The largest locally registered builder in the community and one of the oldest licences in Durham. |
Private company | 42A |
| TH (Bowmanville) Developments Inc. (Treasure Hill) 21 freehold, account B62396, umbrella Treasure Hill, licensed 4 August 2023, registered at 101 Bradwick Drive, Vaughan. The newest of the Toronto platforms with a Bowmanville company. |
Private company | 21A |
| Marianna Developments, Div. of Veltri & Son Ltd. 19 freehold, account B4280, licensed 5 August 1976 and registered at 68 King Street East, Bowmanville — the oldest licence in the community. Two further long-standing Bowmanville licensees, Gay Company Limited and H.L. Gay Family Homes Limited at 55 King Street East, are licensed but the register returns no possession count for either. |
Private company | 19A |
| Municipality of Clarington — all builders The only official completion count that reaches Bowmanville, and it covers the whole municipality: Ontario's housing supply progress table, 899 homes in 2024 against a 1,083 target, 83.01 per cent, status "On track", and 2,135 since 2022 against a ten-year target of 13,000. |
Government | 899 in 2024A |
Commercial landlords
The commercial side, counted separately from housing: who holds the office, retail and industrial floor area.
Bowmanville's commercial property is small beside its two industrial giants, and both of those are owned by entities that say so in public documents — a provincial Crown corporation and a Brazilian cement group. The town's retail is a single REIT-owned big box plus a mall and plazas whose owners no opened source names, and the federal government, which rents in Bowmanville rather than owning.
| Name | Type | Floor area / capacity |
|---|---|---|
| Ontario Power Generation Canadian Nuclear Safety Commission: OPG "owns and is licensed to operate" the Darlington Nuclear Generating Station in the Municipality of Clarington, under a licence issued 1 December 2025 and expiring 30 November 2045. No site area or floor area is published by the CNSC and opg.com is 403 to both curl and WebFetch, so no acreage is claimed. |
Government | 4 CANDU reactors, 3,512 MWA |
| St Marys Cement (Votorantim Cimentos) From the company's own project description: the existing licensed quarry sits "on the shore of Lake Ontario within the Municipality of Clarington" and the proposed underground mine would extend "beneath the bed of Lake Ontario" at up to 4 million tonnes of limestone a year for approximately 100 years. The plant opened in 1969 and Votorantim Cimentos bought St Marys Cement in 2001. |
Public company | a licensed quarry and cement plant on the Lake Ontario shore; up to 4 million tonnes a year proposed for about 100 yearsA |
| CT Real Estate Investment Trust CT REIT 2025 Annual Information Form, Single-Tenant Properties table. The only retail property in Bowmanville whose owner an opened document names. |
REIT | 125,981 sq ft at 2000 Green RoadA |
| Lakeridge Health Lakeridge Health and Infrastructure Ontario issued the Request for Proposals for the Bowmanville Hospital redevelopment on 1 October 2025, with construction expected to start in late 2026. Tier B because the release names the corporation running and procuring the site rather than stating title. |
Institution | one hospital site, to be more than doubledB |
| Government of Canada as tenant — landlords not established Directory of Federal Real Property: the Bowmanville post office at 136 King St E (160 m²), an RCMP office at 422 Lake Road (269 m²) and the Graham Creek lamprey barrier dam. Canada rents all three and the register names no counterparty. |
Government | 429 m² leased in ClaringtonA |
| Bowmanville Mall and the King Street retail No REIT filing, annual report or company page opened in this research names an owner for Bowmanville's enclosed mall or its downtown retail. Ontario publishes no assessment roll, no price-paid file and no bulk ownership extract; the only route is the parcel register at $37.10 per PIN. The record leaves it blank. |
Private company | not establishedA |
Looked for and not found
Claims this page would have made if a source could be opened. They are left out rather than guessed.
- Any Bowmanville-only assessment, levy, population or housing figure. Clarington files one Financial Information Return for 613 km² and five communities, and the province sets one housing target for the municipality.
- The site area of the Darlington Nuclear Generating Station and of the St Marys Cement quarry. Neither the CNSC page nor the company's project description states an acreage, opg.com is 403 to both curl and WebFetch, and Ontario publishes no roll.
- Registered title to the Bowmanville Hospital site. Lakeridge Health's release names the corporation and Infrastructure Ontario as the parties redeveloping it but does not state ownership, which is why that entry is tier B.
- The landlords of 136 King Street East and 422 Lake Road, the two buildings Canada rents in Bowmanville. The federal register proves Canada does not own them and names no counterparty.
- The owner of Bowmanville Mall and of the King Street East retail frontage. No opened filing or company page names either.
- Any assessed value for any Bowmanville parcel. MPAC publishes no roll, its lookup is CAPTCHA-gated and the 2026 tax year still runs on 1 January 2016 values.
- Any per-sale price with an address in Ontario. Consideration appears only on the registered transfer instrument, per parcel, at the fee in s2.
- Whether any sitting member of Clarington Council holds property in Bowmanville relevant to a council decision. clarington.net serves 404 bodies with full site chrome on deep paths and no registry was reached; nothing was established and nothing is alleged.
Sources
- Land Registry — "the official records of property ownership and other legal interests", "more than 7.4 million parcels", services "only available online", "You can do a self-search for a fee" — ServiceOntario (Government of Ontario) · openA
- Bulletin No. 2026-04, Land Services Fee Changes effective November 2, 2026 — copy of parcel register including first page $9.70 + $24.25 + $3.15 = $37.10; adjacent parcel register per PIN $13.15; additional page $2.56; inactive parcel register $1.36 — Ministry of Public and Business Service Delivery and Procurement, Land Registry Services Branch · openA
- Directory of Federal Real Property — full XML dataset (custodian, interest type, land area, floor area, building count, parcel coordinates) — Treasury Board of Canada Secretariat · openA
- The Assessment Cycle — "Property assessments for the 2026 property tax year will continue to be based on fully phased-in January 1, 2016 current values." — Municipal Property Assessment Corporation · openA
- Canadian Geographical Names Database — "Bowmanville", Durham, concise code UNP, generic 200 ("a separately named area within the limits of an incorporated municipality"), decision date 1974-01-01; "Clarington", Durham, TOWN, generic 22, decision date 1993-07-01 — Natural Resources Canada · openA
- Financial Information Return, multi-year bulk data — Municipality of Clarington 2025, Schedule 26 taxable assessment by class and Schedule 22 levies — Ministry of Municipal Affairs and Housing (Ontario) · openA
- Ontario Builder Directory — licensee records and possession counts (api/builders, api/buildersummary) — Home Construction Regulatory Authority · openA
- Ontario's housing supply: January – December 2024 — Clarington 13,000 / 2,135 / 1,083 / 899 / 83.01% / On track — Ministry of Municipal Affairs and Housing (Ontario) · openA
- 2025 Annual Information Form — Single-Tenant Properties table, "2000 Green Road, Bowmanville", 125,981 sq ft, lease expiry 2038; portfolio 31,709,453 sq ft across 378 properties — CT Real Estate Investment Trust · openA
- Darlington Nuclear Generating Station — "Ontario Power Generation (OPG) owns and is licensed to operate the Darlington Nuclear Generating Station (NGS). The station is in the municipality of Clarington"; 4 reactors, 3,512 MW, licence 1 Dec 2025 to 30 Nov 2045 — Canadian Nuclear Safety Commission · openA
- Bowmanville Underground Expansion Project — project description summary: "St. Marys Cement (SMC), a division of Votorantim Cimentos … existing licenced quarry area situated on the shore of Lake Ontario within the Municipality of Clarington"; plus the company history page "In 2001, the Votorantim Cimentos Group purchased St Marys Cement" — St Marys Cement / Ontario Ministry of Northern Development and Mines · openA
- Request for Proposals Marks Another Major Step in the Bowmanville Hospital Redevelopment Journey — Lakeridge Health and Infrastructure Ontario, 1 October 2025; two shortlisted teams; "more than double the size of the current hospital" — Lakeridge Health · openA
- Durham Region open data — BDRY_Municipal_Boundaries ("Municipality of Clarington", 613.12 km²) and COMMUNITY_Durham_Communities ("Bowmanville", community type Town, municipality Clarington) — Regional Municipality of Durham · openA
- Bowmanville Hospital — location page giving 47 Liberty Street South, Bowmanville, ON L1C 2N4 — Lakeridge Health · openA