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The Assessment of the Significance of Impacts of Development on Historic Landscape (ASIDOHL) is a detailed process for assessing, as objectively as possible, how much change a proposed development might bring to the fabric and appearance of the surrounding historic landscape. They are normally prepared as an integral part of the planning process, particularly where an Environment Statement is required.

The system was developed as an assessment tool for larger-scale developments effecting the sixty or so Historic Landscapes appearing in the Register of Landscapes of Historic Interest in Wales, but increasingly they are being requested for similar developments in landscapes outside these areas. The published methodolgy for the ASIDOHL process and information about the treatment of historic landscapes can be found by following this link.

For further information and competitive quotations on any of our services contact:

Bob Silvester, Deputy Director and Head of Field Services
Direct line 01938 552035

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