My sister and brother are going to do a site survey. My sister is an architect and my brother a man of leisure with degrees in both engineering and architecture so this is not beyond their wit...
Here is what I am going to ask them to do.
1. A full measured survey of the existing site and buildings (with photographs as required - to explain junctions etc). This should be to enough detail that we can build with confidence from it - order a timber frame to exact dimensions etc - accuracy to 2mm.
2. Two ground condition trial pits with photographs. These should be at least 1m deep, outside of the location of the proposed foundations, one should be near the tree to check for how extensive the root ball is and to assess the potential for foundation disturbance. The other one should be somewhere else on the site. Look for and photgraph, soil type (sand or clay or gravel etc - my guess and hope is sandy gravel as its near the beach). Also note any other 'things' in the ground that may effect construction; rock, toxins (chemical leaks etc), artefacts, big holes, pipes, etc.
3. A heights survey of the land and surrounding roads. This will be used to assess drainage and foundation heights. It should be accurate to about 10mm. see following steps for more detail:
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