123 Highbury New Park, London Data via plota.co.uk

Proposal

The eucalyptus tree is causing ongoing and progressive structural damage to the property. A structural engineer’s report (attached) confirms that the tree’s proximity to the building (approximately 2.44 metres from the rear extension) and its high water demand are resulting in significant soil moisture extraction from shrinkable London Clay beneath shallow foundations. This has led to repeated cycles of clay shrinkage and rehydration, causing differential ground movement that is manifesting as cracking to the rear extension, internal walls, external masonry and associated retaining walls. The cracking is structural in nature, has reappeared following previous repairs, and is actively worsening following seasonal weather changes, demonstrating that the underlying cause remains unresolved. The report further identifies deformation and cracking of the adjacent retaining wall, which is being exacerbated by ground movement and fluctuating soil moisture conditions associated with the tree. It concludes that remedial works to the building and retaining structures will not be effective unless the influence of the tree is removed, and that continued retention of the eucalyptus will result in ongoing and potentially increasing damage. On this basis, the structural engineer considers the tree to be a material and significant contributing factor to the damage currently occurring and recommends its removal as a necessary prerequisite to stabilising the property and preventing further deterioration. Species: Eucalyptus (gum tree) Quantity: One (1) Location: Rear garden of the property, positioned approximately 2.44m from the rear extension retaining wall and shallow foundations. Description: Mature eucalyptus tree with a substantial canopy and trunk diameter consistent with maturity (as shown and described in the attached structural engineer’s report). Proposed works: Removal of one mature eucalyptus tree. Method: Controlled and staged removal, commencing with crown reduction followed by phased removal of the main stem, in accordance with the recommendations set out in the attached structural engineer’s report. Stump treatment: The stump to be cut down to near ground level and treated to prevent regrowth. Full stump grubbing is not proposed at this stage to avoid sudden soil disturbance and rapid rehydration of shrinkable clay soils. Reasoning: The staged approach is intended to manage the risk of post-removal ground heave and to allow gradual rebalancing of soil moisture conditions. Data via plota.co.uk