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Island Development Plan Focused Review


The information site for the IDP Focused Review, with links to the public consultation and supporting documents, is at



The Island Development Plan was adopted by the States in 2016. It sets out all the land planning policies for the island in one document and is used to determine whether planning applications can be accepted or not.

A key part of the IDP is the map showing which areas of Guernsey are designated as main or local centres where development may be possible. Permission to develop land that lies outside of a main or local centre can only be achieved if you are converting an existing structure or sub-dividing a home. Concentrating development within “the black lines” that delineate the main and local centres is deliberate. It ensures that new houses are built where infrastructure already exists and it reduces ribbon development (houses lining the roads).

The Development and Planning Authority (DPA) is required to conduct an interim review of the IDP after five years. This should have happened in 2020 but was paused because of the pandemic. The DPA has just published a ‘IDP Focused Review’, concentrating on specific policies, for public consultation. Closing date for your comments is 29 July 2024.

The new Proposals Map that the consultation is based is here. Guidance notes on how to use it are here.

Note that the IDP must conform with the States Strategic Land Use Plan (SLUP). The SLUP was agreed in 2011 and sets out the framework for development in Guernsey for the next 20 years in order to achieve the States’ agreed economic, social and environmental objectives.


Calculating how much housing land Guernsey needs

In October 2022, the States agreed that, for the purpose of planning future infrastructure and services, net migration will average up to +300 per year over the next thirty years.  This degree of net migration is needed to maintain the working population at 2020 levels. See: Population and Immigration Review.

In February 2023, the States debated and agreed the States Strategic Housing Indicator which assessed that Guernsey needed to create 844 units of private accommodation and 721 units of affordable accommodation over the next five years – a total of 1565. These figures were based on +300 net migration.

In September 2023, the DPA issued a Call for Sites to find out whether there were sufficient developable sites in the island to meet the private and affordable targets (after adding 15% for private and 25% for affordable to take into account that not all sites will be developed). It found that there were sufficient sites within the main and local centres to meet the private housing target. But there weren’t sufficient to meet the affordable housing target. It is therefore proposed to add six affordable housing sites that border the current ‘black lines’. Proposals Map.


Other proposed changes

1. Remove GP11, which is the requirement to include 20-30% affordable housing within large developments. The States suspended GP11 a couple of months ago, this change would remove it completely. More about GP11.

2. Increase the land designated as an Areas of Biodiversity Importance (ABI) by 140 hectares to 334 hectares. [Note, this is very low level protection, the land can still be developed. However, the biodiversity of the area should be protected or where possible enhanced, and any negative impacts mitigated].

3. Extend the L’Aumone Local Area to include Castel Hospital.

Additional changes are summarised in these graphics:



The main pushback on the plans has come from Committee for Environment and Infrastructure. E&I is responsible for the high-level Strategic Land Use Plan (SLUP), whereas the Development and Planning Authority is responsible for the practical operational document, the Island Development Plan (IDP).

E&I are not happy that some of the six additional sites for affordable housing are greenfield sites and they don’t believe this meets the spirit of the SLUP which stresses the desirability of developing urban and brownfield sites. E&I signed off on the IDP so as not to delay the next stage, which is a planning inquiry. But they intend to object at that inquiry.

Deputy Falla has objected to the inclusion of new greenfield sites rather than using old glasshouse sites.




Next stages

1. Public consultation, responses required by 29 July. Go to

2. Livestreamed online Q&A, date to be confirmed.

3. More public consultation in August but only on the issues raised in the initial consultation.

4. Planning inquiry in mid-October, lead by independent planning inspector.

5. States debate in March 2025.



More than 50 new areas of biodiversity importance (25 Jun, Guernsey Press)
Plans for 2000 homes over the next five years (25 Jun, Guernsey Press)
Comment: Has red tape tied up the IDP? (25 Jun, Guernsey Press)
Deputies and public urged to have say on proposed planning reforms (25 Jun, Bailiwick Express)
More than 1,700 local homes could be built across 17 sites (26 Jun, Guernsey Press)
Landowner gets planning shock but welcomes affordable homes (26 Jun, Guernsey Press)
Churches and quarries could be recognised for biodiversity (26 Jun, Bailiwick Express)
Political concerns about DPA’s affordable housing sites (27 Jun, Bailiwick Express)
DPA faces backlash over plans to rezone green fields (28 Jun, Guernsey Press)
Planning authority steeling itself for IDP representations (1 Jul, Guernsey Press)
DPA’s review of IDP ‘flawed’ according to Deputy (4 Jul, Bailiwick Express)

Guernsey’s iconic women of the future?

Thank you for nominating a young woman or girl for our future iconic Guernsey women campaign to celebrate International Women’s Day!

Nominations close on Sunday 6 March at 17.00.

Please fill in the details below.


Miriam Makeba - South Africa

Nominated by: Christine James

Zenzile Miriam Makeba (1932 to 2008), nicknamed Mama Africa, was a South African singer, songwriter, actress, United Nations goodwill ambassador, and civil rights activist. Associated with musical genres including Afropop, jazz, and world music, she was an advocate against apartheid and white-minority government in South Africa. In 2020 she was named one of Time magazine’s 100 women of the century. 

South Africa is ranked 12th in the world for percentage of women in national parliament: 45.8% (source: 

Are you from South Africa? Please email if there is a social or cultural group for people from South Africa in Guernsey.

Want to learn more about public office vacancies in Guernsey? 

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The original image “The Hague Jazz 2008 – Miriam Makeba” by Haags Uitburo is licensed under CC BY-NC-SA 2.0. 


Jacinda Ardern - New Zealand

Nominated by: Martin Lock

Jacinda Ardern (born 1980) has served as prime minister of New Zealand and leader of the Labour Party since 2017. In 2019, she led the country through the aftermath of the Christchurch mosque shootings, rapidly introducing strict gun laws in response, and throughout 2020 she directed the country’s widely praised response to the COVID-19 pandemic. Ardern was the world’s second elected head of government to give birth in office when her daughter was born in 2018. ‘An inspiring Prime Minister who brought a nation together with true leadership, empathy and compassion.’

New Zealand is ranked 4th in the world for percentage of women in national parliament: 48.3% (source: 

Other iconic women: Dame Whina Cooper, nominated by Claire Fisher, and Kate Sheppard, nominated by Anna Cooper.

Are you from New Zealand? You may be interested in joining the ANZACs in Guernsey Facebook group

Want to learn more about public office vacancies in Guernsey? 

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