Permission for Deep Retrofit and Extension to Hampstead House
We have now received permission for a deep retrofit and extension to an interesting early c20 terraced house in Hampstead.
The house appears to be a typical Georgian terrace and is adjoined to two Grade II listed houses of similar appearance. The site is however not listed. Research undertaken by ourselves and heritage consultant Jon Lowe Heritage revealed the house to have been almost entirely rebuilt in the early twentieth century, explaining the lack of a listing.
We were able to use this to convince the local authority to permit a full replacement of doors and windows throughout with double-glazed timber equivalents, which is unusual in the Hampstead Conservation Area. We are also proposing full internal wall insulation, solar panels, a combined air and ground source heat pump, and a mechanical ventilation and heat recovery system throughout. Heating is provided by underfloor heating and active cooling by cooled ceilings. The refurbishment is expected to achieve or come close to achieving EnerPhit standards, and does not rely upon gas for heating or hot water.
Surprisingly, much of the proposed works were found to fall within the government’s extensive permitted development rights, meaning we did not need to apply for permission for much of the energy efficiency works.
To the rear we have also received permission for a fully-glazed extension and ground floor terrace, increasing the area of the house and quality of the internal spaces significantly.
Design work continues while construction work is already progressing swiftly.