The family-owned Lodge hotel in Putney, London, is to launch an extra 25 guest rooms and a newly developed events space in July 2015.
The rooms and the 1,800 sq ft events space - capable of catering for up to 200 guests - will build backwards into space previously occupied by a car park and garden, with development focused on sustainability and the use of environmentally friendly materials.
Bristol based architects AWW Inspired Environments and local interior designers Distinction Contracts have both been involved in bringing the project to fruition.
"To achieve the BREEAM Excellence accreditation we have had to engineer a building that is 40% more energy efficient than latest building regulations," said Hirschfield. "We have embraced best practice when it comes to sustainable build."
The installation of a green sedum roof has functioned to absorb rainwater reducing surface run off and helping to heat and cool the building. Solar panels run the air source heat pumps, which in turn use renewed air energy to produce hot water, channelling unwanted heat back into the system.
The additional use of large steel windows and reflective rain screen cladding in the build has contributed to the promotion of ecological benefits to the close environment.
When asked about the hotel's wider environmental policy, Hirschfield stated that the hotel is aiming to improve the biodiversity of the area by planting different grass species and that they use responsibly sourced materials, recycling building waste where possible.
The extension follows the recent opening of the hotel's Hide and Seed restaurant, which began serving customers in March.