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    Home » Living In » Planning » Affordable Housing » Calculating Affordable Housing

    A guide to calculating affordable housing



    This page provides information and documents for calculating affordable housing requirements for new housing development schemes in Pembrokeshire Coast National Park.  On this page you will find templates for agreements, a copy of the Development Appraisal Toolkit that Pembrokeshire Coast National Park Authority use for calculating contributions.

    How to calculate affordable housing contributions

    Windfall Sites

    Where a financial contribution, at a rate of pounds per square meter gross internal area (this is the area from the internal wall surfaces),is required please see Appendix 4 of our Affordable Housing SPG.

    Local Development Plan site allocations

    If your site was allocated in our Local Development Plan please see Appendix 5 of the Affordable Housing SPG for a revised percentage affordable housing provision.  Green cells indicate where the Authority considers a proposal would be viable.  The Authority anticipates that schemes can expect a contribution of 55% Acceptable Cost Guidelines from housing associations where properties are transferred across.


    Affordable Housing Viability Assessment

    Pembrokeshire Coast National Park Authority use the Wales-wide Development Appraisal Toolkit (DAT) for the purposes of calculating affordable housing contributions.  This toolkit is a bespoke version for Wales and is based on the Andrew Golland Associates: 3D Toolkit, which is the industry model used in England.  Applicants can also submit an economic viability assessment of there scheme using this toolkit, a copy of the toolkit and other resources that help applicants to produce economic viability assessments can be found in the resources list below.




    Unilateral Agreement

    PCNPA has produced a unilateral agreement template for financial contributions, along with some guidance notes.

    Help and inquiries

    If you have any questions about the resources provided on this web page or if you are experiencing any technical issues please contact us.