Fraser Bond are the leading lettings and property management agents for Brook Valley Gardens - London EN5. Brook Valley Gardens is a residential development from Countryside in the garden suburb Chipping Barnet in Greater London EN5. Built in five phases over seven years, the development will create ca 600 high-quality new homes by 2025. New Homes The new homes are two and three-storey terraced houses with private gardens, with details from full-height French doors and dormer windows to the buff brick as well as crown and mansard roof styles. Sustainability Integrated passive and active measures will.