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Blossom Court – St Ann’s Hospital, Haringey

Client: Barnet, Enfield & Haringey Mental Health Trust

Architect: Medical Architecture

Contractor: IHP

Value: £22 million

Expanding on their existing services, St. Ann’s Hospital is undergoing an overall site development, which included a new mental health residential facility. Perega was appointed as civil and structural engineers for the new building under the Department of Health’s new ProCure22 (P22) Construction Procurement Framework.

The facility comprises two storeys of ward space with a roof top plantroom. The first floor features three general mental health wards with the ground floor including an eating disorder ward.

Due to the limited capacity of local sewers and the impermeability of the soil, extensive underground surface water attenuation was needed. The attenuation was designed to fit around the extensive underground services as this meant the large cost of moving the other services was avoided. The drainage had to be designed and coordinated to work around the phased development programme without adversely affecting the on-going use of the wider site. Integrating the drainage into the phased built programme meant that the Trust had less ‘out of phase’ waiting and disruption to their activities. It also saved money by reducting fragmentation of the work site.

Along with the new building, the redevelopment involves improving pedestrian access to the site, adapting existing roads to suit the new building layout as well as accommodate future renovations and site extensions.

To support the sale of part of the site for residential development, Perega created a sustainable drainage strategy and initial road design for planning consent.

Image credit: © Tim Crocker