Introduction
The Angel Building, 407 St John Street, is a new speculative development comprising approximately 245,000 sqft (22,800sqm) of high specification office and retail accommodation over 6 floors and 5,920 sqft (550 sqm) of retail space at ground floor. Located in a conservation area of the London Borough of Islington it is bounded by St John Street and Pentonville Road to the east and north respectively.
The building is principally accessed from street level via an open public area from St John Street. The new alignment of the St John Street facade has allowed for the creation of public realm on the primary elevation of the building and creation of a significant entrance space and new retail frontage.
The development is ideally located for access to transport routes in and out of London. Angel underground station is situated opposite the building on the corner of City Road and Upper Street, overland and underground stations of Kings Cross and Farringdon are also only a short journey from the building.
The office floor plates are designed to maximise flexibility of use by various business sectors in a variety of space planning configurations that are based in a 1.5 meter planning grid. The office accommodation has been designed to allow up to four tenancies per floor.
Building Description
The proposed building comprises a high quality 6 storey office building, with mixed use located at the Ground floor to accommodate A1, A3, B1 or D1 use.
The building comprises a major refurbishment and extension of an existing six storey office building constructed in circa 1980.
In gaining planning permission the building has considered the height of the building in relation to the surrounding structures, the impact on the conservation area and providing new public space. The new building utilises the existing building structure and adds approximately 105,000 sq/ft additional area by providing three new primary extensions in the following areas:
• A curved extension to the east facade (St John Street)
• A linear extension to the south
• A courtyard infill to the centre forming new accommodation and glazed atrium
The building has been designed to incorporate the latest initiatives in limiting energy consumption and saving natural resources, resulting in a sustainable project that reduces the carbon footprint of the whole development by the following measures:
•Refurbishment of the existing building frame and retention of thermal mass
• Low energy displacement ventilation
• High performance facade with openable windows for greater occupant comfort.
• Variable speed drives on pump fans
•Daylight balanced efficient lighting and advanced lighting control system
•Heat recovery (up to 65%) via recirculation air
• Advanced BMS controls
• Hydraulic interface units which provide domestic hot water from LTHW system
• Water cooled chillers for higher system efficiency
• Water conservation measures including, rainwater harvesting and waterless urinals
• Green Lifts - regeneration drives on lifts
• Incorporating renewable energy, bio-mass boilers
• BREEAM rating - Very Good
