
Portland House
The development at Portland House will comprise circa 300,000ft² of primary office led accommodation together with retail and amenity space.


St Jame’s Market Phase 2 will comprise an approximate 300,000ft² mixed use development. At the basement and ground floor will be retail and restaurant units together with two office receptions. Levels 1 to 7 will comprise new office accommodation served by two separate cores in order to provide flexibility for future leasing options. There will be two levels of basement housing plant, waste facility, cycle stores, changing room and shower facilities together with the usual building management space. Further plant areas are provided at roof level including for retail and office tenant’s use. At various levels of the building will be external terraces with a combination of private and communal use.
Sustainability is very high on both Client’s agenda including the team targeting BREEAM ‘Outstanding’ rating for the office accommodation and ‘Excellent’ rating for the retail space, along with a WELL Gold rating. The Crown Estate Development Sustainability Principles are being adopted throughout together with maximising amenity, biodiversity and renewable energy solutions.
The MEP services strategy for heating and cooling in all areas aligns with The London Plan in terms of utilising air source heat pumps with no burning of fossil fuel. In addition, the project is the “pioneer” related to the Design for Performance initiative and NABERS UK rating.

The development at Portland House will comprise circa 300,000ft² of primary office led accommodation together with retail and amenity space.

Watkins Payne reviewed a number of mechanical and electrical options with the team, focusing on retention of key central plant, overhaul and replacement of plant where required, and LED lighting to reduce energy and improve the office environment.

Premier Inn has recently invested in the redevelopment of its Uxbridge hotel to provide increased accommodation options and better facilities for guests.

The building at 20 St James’ Street has been refurbished to offer 53,295ft² of high quality office accommodation, for which Watkins Payne supplied building services engineering, vertical transportation engineering, BREEAM duties and energy consultancy to achieve an BREEAM ‘Very Good’ and EPC B rating.

The development Pegasus Mayfair is targeting a B rated EPC, BREEAM ‘Outstanding’ and WELL ‘Gold’ and Watkins Payne is providing these services.

The exposed services strategy implemented at Fortess Grove compliments the industrial nature of the building. Cycling facilities are provided along with showers and lockers at ground floor level accessed directly from the rear of the building along Railey Mews. The development achieved a WiredScore certification of ‘Gold’ and a B rated Energy Performance Certification.