Former Anglesey Aluminium Site

A strategic, 91-hectare (224 acres) site where work has started on a £1bn ecopark with a 300 MW biomass power station as its core development. On the former Anglesey Aluminium smelting site.

Bryn Cefni Industrial Estate

An existing 63-hectare (155 acres) industrial estate with mix of office and light industrial uses, close to the A55 with design and build opportunities for the low carbon energy supply chain. Suggested uses for potential new development include housing and employment.

Creamery Land north of Lledwigan Farm

With easy access via the A55, this 25-hectare (61 acres) site has potential to accommodate industrial and office uses with its allocated employment use (currently in agricultural use).

Gaerwen Industrial Estate

A 56-hectare (138 acres) site close to the A55 including existing industrial and office uses with capacity for low carbon energy businesses and manufacturing. Bordering housing, the site comprises an existing industrial area to the west, the central Welsh Farm Foods site and potential greenfield expansion site to the east.

Marine Zone

The Marine Zone has been identified by the Crown Estate in consultation with statutory and other stakeholders as being a suitable location for the installation of marine energy devices in the short to medium term. This is founded on the Zone’s good tidal current resource and low wave regime. 

Menai Science Park

M-Sparc supports businesses to develop and grow, and aims to diversify and support the region’s economy. Companies in the low carbon, energy and environment, ICT and life science sectors are brought into a community of like-minded businesses at the park, provided with business support to enable them to grow, and are able to access research excellence at Bangor University. M-SParc and its tenants continues to provide well-paid careers and are working alongside others in the region to support a skilled workforce.

Parc Cybi

The island’s premier business site with direct access onto the A55 north Wales expressway, full infrastructure and a development masterplan. 53 hectares (130 acres), with fast links to Bangor, Chester and the wider UK motorway network and close to both the Port of Holyhead and Wylfa Newydd.

Penrhos Industrial Estate

5.35 hectares (13 acres) on this existing estate close to Junction 2 on the A55, to key energy projects and the Port of Holyhead. Ripe for development with all the necessary infrastructure in place and offering a good location to supply chain firms. Fast links to Bangor, Chester and the wider UK motorway network.

Port of Holyhead

Deep water port facilities, existing accommodation and development plots on a 98-hectare (242 acres) site. The Inner Harbour, Salt Island and the Outer Harbour offer marine, leisure, transport, energy, cruise and other business opportunities at the main gateway to Ireland. The main gateway to Ireland for freight and passengers, and active in the cruise market. Good road and rail links. 


An 82-hectare (202 acres) brownfield site in a rural location, around six miles from Wylfa Newydd, offering potential for supply chain firms and supporting development. At 3.2km (1 mile) south west of Amlwch, access junctions into the site are well-scaled for industrial use, while there is scope to remodel the site for any future redevelopment to improve access to land.

Amlwch Industrial Estate

A 15 hectare site, in close proximity to Amlwch town centre, allocated for light industrial, industrial and manufacturing, warehousing and distribution (B1, B2 & B8) uses. Much of the site has already been developed however, some parcels of land, allocated within the Joint Local Development Plan (Anglesey & Gwynedd), are yet to be developed for employment land.

Former Octel Site


A 19.3 hectare, vacant, coastal site, with the potential to accommodate general industrial and storage and distribution (B2 & B8) uses.

Coleg Menai

Grŵp Llandrillo Menai has outline plans for a major development and investment for Coleg Menai’s Llangefni Campus. The intention is to extend the existing Campus to develop a specialist Technology and Energy Centre serving Ynys Môn and Gwynedd, and also to create Business Incubator Units to support the wider economy.  Coleg Menai already houses an Energy Centre, a Construction Centre and a Heavy Plant Training Centre at Llangefni, and this development will also include a new Engineering Centre for the College.

Wylfa Nuclear Power Station

The 500 hectares of developable land at Wylfa affords potential for new development as one of Europe’s best locations for new nuclear with its excellent geological conditions, coastal proximity, grid connections and importantly, strong local support. The site is adjacent to the former Magnox nuclear power station, which was the last and longest running Magnox site in the UK, when it came off grid in late 2015. The site is owned by Hitachi and, Welsh Government continue to work with the company, to bring forward new development as soon as possible, to exploit the site’s full potential.