Hornsea One
Located 120km off Yorkshire coast. O&M from East Coast Hub, Grimsby.
Status
Operationallifecycle stage
Ownership
Ørsted — 37.55% ◆
Equitix — 14.85% ◆
Brookfield — 12.45% ◆
Greencoat UK Wind — 10.55% ◆
TRIG — 10.15% ◆GIGLIL Infrastructure — 6.25% ◆
Octopus Energy Generation — 6.25% ◆SGSchroders Greencoat — 1.95% ◆
Location
United KingdomNorth Sea
Technology
Capacity
1,218 MW ◆
Turbines
174 × 7 MW ◆
Model
Siemens Swt 7-0-154 ◆
Foundation
Monopile ◆
Site & conditions
Site rights
Seabed rights held ∴
Origination
Crown Estate Round 3 · 2010 ·
Water depth
20–40 m ◆
Distance from shore
120 km ◆
Wind speed
10.0 m/s @ 100 m ≈
Revenue & grid
Offtake
CfD · FIDeR ◆
Grid
Connected ◆
Connection
Grid connection secured. Landfall at Horseshoe Point. Onshore … ◆
Schedule
FID
2016 ◆
COD
Dec 2019 ◆
Project timeline & ownership verified milestones on the spine · ownership from Hafrok's transactions record
7 dated milestones on the spine, each with its source · 10 recorded ownership deals from Hafrok's transactions record · the developer's announced-COD history
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Revenue & offtake contract terms, price levels and the route to market
the contract terms on record · price over time in money of the day · the routes to market and the next visible round
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Installation how the build is going · from sourced statements and Hafrok's registers
construction status and turbines standing · vessel and port contracts · the grid connection and whether it is ready in time
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Sources & verification
Rests on 19 sources (22 primary) · ◆ 14 documents held
◆Verified≈Modelled◇Sourced∴Inferred⌁Convention○Unverified∅No source·Derived
Numbers are stable citation ids — grouped by source class, so they are not consecutive.
Regulator3
[1]
Planning Inspectorate / DECC (UK Government)2014-12-10◆ Hornsea One Offshore Wind Farm variation…
“On 10 December 2014, the Secretary of State for Energy and Climate Change granted a Development Consent Order (DCO) for Hornsea One Offshore Wind Farm.”
supportsConsentConsent appliedConsent granted
[16]
Department for Energy Security and Net Zero2026-05-06◆ Renewable Energy Planning Database (REPD…
“REPD Q1 2026 quarterly extract — Ref ID 2525: Site Name "Hornsea 1 - Heron & Njord", Development Status "Operational", Installed Capacity 1218 MWelec, Operator "Orsted (formerly Dong Energy)"”
supportsRegister entry
[28]
The Planning Inspectorate (PINS)2026-08-23◆ PINS national infrastructure application…
“Project reference EN010033: "Hornsea Offshore Wind Farm (Zone 4) - Project One"; applicant "SMart Wind Limited"; Stage "Post-decision"; applied 2013-07-30; accepted 2013-08-22; decision 2014-12-10.”
supportsConsentConsent appliedConsent granted
Operator5
[4]
Ørsted2019-02-22◆ The worlds biggest offshore wind farm Ho…
“2019-02-15T08:00:00.0000000Z ... The first turbine at the world's biggest offshore wind farm has been installed and is now producing electricity.”
supportsFirst power
[5]
Ørsted2019-06-01◆ Our Offshore Wind Farms
supportsCommercial operationStatusConnection pointO&M base (East Coast Hub)
[9]
National Audit Office2014-06◆ Early contracts for renewable electricit…
"Administrative strike prices by commissioning date and technology (2012 GBP/MWh)" - Offshore wind: 2016-17 150; 2017-18 140; 2018-19 140. FIDeR strikes are CPI-indexed; the same strike applies to all…
supportsMechanismDetail
[17]
National Energy System Operator (NESO)2026-07-21◆ NESO Transmission Entry Capacity (TEC) R…
“NESO TEC Register, edition 21 July 2026 - PRO-000315: "Hornsea Power Station 1A", Status "Built", MW Connected 400, Effective From n/a, Customer "HORNSEA 1 LIMITED"; PRO-000331: "Hornsea Power Station…”
supportsRegister entry
[21]
Octopus Energy2022-08-03◆ Octopus Energy and Nest form joint ventu…
“Octopus Energy Generation's fund management team is investing £200m in Hornsea One on behalf of Nest, one of the UK's largest pension schemes representing a third of the UK workforce. Through a joint …”
supportsfinancial
Financier4
[8]
Ørsted / Brookfield2024-10-30
“Brookfield ... 12.45% minority stakes in four of Ørsted's operational U.K. offshore wind farms. ... Ørsted will retain a 37.55% ownership interest in the four assets.”
supportsoperatorfinancial
[18]
Equitix2024-07-01◆ Equitix — Hornsea One (portfolio page, s…
“The asset is operated by Orsted. The shareholders are Orsted (50%), Equitix (14.85%), TRIG (10.15%), Greencoat (12.5%), GLIL (6.25%) and Octopus (6.25%).”
supportsfinancial
[22]
Greencoat UK Wind plc (RNS via Investegate)2025-07-30◆ Sell-down of interests in three wind far…
“The Company will also today dispose of a 1 per cent interest in Hornsea 1 offshore wind farm for a gross asset value of £69 million. This includes £39 million of UKW's proportional share of limited re…”
supportsfinancial
[23]
Greencoat UK Wind plc (RNS via Investegate)2026-02-26◆ Greencoat UK Wind plc Final Results Anno…
“In Q3 2025, the Group disposed of 32.7 per cent interests in Andershaw and Bishopthorpe onshore wind farms as well as a 1.95 per cent interest in Hornsea 1 offshore wind farm for £181 million of which…”
supportsfinancial
Auction results1
[30]
Low Carbon Contracts Company (LCCC)2026-07-31◆ lccc-portfolio-status-2026-07
Investment Contract units, all 'Live (Post-FIC)': INV-BUR-001 Burbo Bank Extension; INV-DUD-001/002/003 Dudgeon; INV-WAL-001/002 Walney Extension; INV-BEA-001/002 Beatrice; INV-HOR-001/002/003 Hornsea…
supportsInvestment contract · FID Enabling for Renewables (FIDeR) investment contracts
Trade press6
[6]
Tethys (Pacific Northwest National Laboratory)◆ Hornsea 1 | Tethys
“1218 MW. 174 turbines. SWT-7.0-154. Monopile.”
supportsTurbinesModelUnit capacityTotal capacityFoundation+2 more
[7]
Power Technology
Press report — cited, not quoted; read it at the source link.
supportsFinal investment decisionCoordinates
[10]
offshoreWIND.biz2016-11-03
Press report — cited, not quoted; read it at the source link.
supportsOnshore constructionOffshore construction
[11]
offshoreWIND.biz2018-01-26
Press report — cited, not quoted; read it at the source link.
supportsOnshore constructionOffshore construction
[12]
offshoreWIND.biz2020-01-30◆ World's Largest Offshore Wind Farm Fully…
Press report — cited, not quoted; read it at the source link.
supportsCommercial operationCOD history
[13]
Early access