Charles Darwin House offers unique modern office accommodation extending to 17,794 sq ft (1,653.3 sq m) NIA arranged over ground and four upper floors. The building underwent a major refurbishment in 2010, following which it was awarded a sought after BREEAM excellent rating. A BREEAM excellent rating means this building is in the top 10% of UK non-domestic buildings, not only in terms of environmental practice but of overall performance in all of the scoring categories. These include health and wellbeing, management, materials and typical environmental measures such as pollution, energy, waste and water. There is a strong focus on green initiatives in the building, with 100% of the energy utilised being renewable. 90% of the building's waste is recycled or returned to the supplier for re-use and therefore energy efficiency initiatives have been brought to the fore. There is also a rear yard which is currently utilised for 3 car parking spaces and bicycle storage.