Seagreen 1A
Extension to operational 1.1GW Seagreen Phase 1 (operational 2023). Located 27km off Angus coast.
Status
Advanced Developmentlifecycle stage
LikelyHafrok delivery likelihood
Ownership
SSE Renewables — 49% ◆
TotalEnergies — 51% ◆Location
United KingdomNorth Sea
Technology
Capacity
500 MW ◆
Turbines
36 ◇
Foundation
Fixed-bottom (structure not recorded) ◆
Site & conditions
Site rights
Seabed rights held ∴
Origination
Crown Estate Round 3 · 2010 ·
Water depth
44–59 m ≈
Distance from shore
27 km ◇
Wind speed
10.4 m/s @ 150 m ≈
Revenue & grid
Offtake
—
Grid
Secured ◆
Connection
Cockenzie 400/275kV ◆
Schedule
FID
Not taken
COD · Hafrok
for registered readers
Delivery outlook modelled by Hafrok · calibrated on delivered projects
LikelyHafrok's delivery likelihood for Seagreen 1A
The developer has stated no date. Hafrok's year, the chance and the working are for registered readers.
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Project timeline & ownership verified milestones on the spine · ownership from Hafrok's transactions record
2 dated milestones on the spine, each with its source · 3 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 18 sources (8 primary) · ◆ 13 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.
Regulator7
[6]
Companies House2024-05-03◆ SEAGREEN 1A (HOLDCO) LIMITED persons wit…
“SEAGREEN 1A (HOLDCO) LIMITED (12570748): TotalEnergies Renewables UK Limited — Ownership of shares more than 50% but less than 75%, notified 2024-05-03. SSE Renewables Services (UK) Limited — Ownershi…”
supportsoperatorowner
[13]
Department for Energy Security and Net Zero2026-05-06◆ Renewable Energy Planning Database (REPD…
“REPD Q1 2026 quarterly extract — Ref ID 14144: Site Name "Seagreen Phase 1A", Development Status "Awaiting Construction", Installed Capacity 540 MWelec, Operator "SSE / Seagreen Wind Energy Ltd"”
supportsRegister entry
[14]
Scottish Government Marine Directorate (MD-LOT)2026-08-23◆ Scottish MD-LOT marine projects register…
“Register row "Seagreen 1A Export Cable Corridor" (key ml/seagreen-1a-export-cable-corridor): Application stage "Pre-application", type "Renewables - Wind".”
supportsRegister entry
[15]
Scottish Government Marine Directorate (Marine Scotland)2022-12-20◆ Seagreen Alpha Offshore Wind Farm genera…
“The substructure and foundation design for the WTGs and meteorological masts will consist of either one of, or a combination of, the following design options: Up to four legged steel jacket with drive…”
supportsFoundation
[16]
Scottish Government Marine Directorate (Marine Scotland)2022-12-20◆ Seagreen Bravo Offshore Wind Farm genera…
“The substructure and foundation design for the WTGs and meteorological masts will consist of either one of, or a combination of, the following design options: Up to four legged steel jacket with drive…”
supportsFoundation
[17]
Scottish Government Marine Directorate (MD-LOT)2025-11-26◆ Section 36 Variation - Seagreen Alpha an…
“Section 36 Variation - Seagreen Alpha and Bravo Offshore Wind Farm, Firth of Forth ... Application stage: Post-consent Applicant name: Seagreen Wind Energy Limited ... Date of application: 2025-06-26 …”
supportsStatus note
[18]
Seagreen Wind Energy Limited (via Scottish Government Marine Directorate)2025-06-26◆ Seagreen Project Section 36C Variation A…
“SEAGREEN PROJECT SECTION 36C VARIATION APPLICATION ... The proposed amendments included in the variation are: A shift of commencement for constructing the Seagreen 1A infrastructure within a construct…”
supportsStatus note
Operator3
[3]
NESO2026-06-12◆ NESO Transmission Entry Capacity (TEC) R…
“Seagreen Phase 1A,SEAGREEN 1A LIMITED,Cockenzie 400/275kV,,0,500,500,01/04/2028,Under Construction/Commissioning,Direct Connection,SPT,Wind Offshore,a1f4L000000EHHiQAO,PRO-000703,”
supportsTotal capacityStatusConnection point
[4]
SSE Renewables2022-10◆ Seagreen’s Renewable Energy Output to be…
“Scottish Ministers have granted a variation under section 36C of the Electricity Act 1989 to increase the potential installed capacity of the project's remaining 36 turbines from 360MW to up to 500MW.…”
supportsConsentTotal capacityConsent appliedConsent granted
[5]
SSE Renewables2021-12-13◆ Marine Licence milestone for Seagreen 1A…
“Scottish Government Ministers have approved the Marine Licence application for the Seagreen 1A project … The Marine Licence covers the offshore elements of the project, including an export cable appro…”
supportsStatus note
Auction pipeline1
[19]
DESNZ (gov.uk)2026◆ govuk-cfd-ar8
gov.uk AR8 collection — Allocation Framework, statutory framework and CIB documents published ahead of the round.
supportsCfD Allocation Round 8
Trade press5
[7]
ORE Catapult2026-01◆ Allocation Round 7 (AR7) Results and Ana…
“Wind Farm Name | Owner(s) | AR7 Eligible Capacity (MW) | AR7 Awarded Capacity (MW) | Seagreen 1A | | 500 |”
supportsStatus note
[9]
[10]
[11]
[12]
Unverified import2
[1]
[2]
SSE Renewables◆ Seagreen1A | SSE Renewables
“there is consent to install a total of 150 wind turbines, so the Seagreen1A project team are taking forward plans to install the remaining (up to) 36 wind turbines and develop appropriate connections …”
supportsTurbines
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