ANDENNIS

Extension, Renovation & Retrofit
Location: St Mawes, Cornwall

A Comprehensive Transformation of a Coastal Home

Andennis is a substantial family home situated in St Mawes, with far-reaching views towards Falmouth. The project involved an extensive renovation, retrofit and extension of the existing property, transforming it into a more functional and energy-efficient six-bedroom family home. The works included a complete internal refurbishment, improvements to the building fabric and a reconfiguration of the existing accommodation.

Reworking the Existing Home

The removal of the existing swimming pool and first-floor terrace created the opportunity for a new two-storey extension, providing two bedrooms and a media room at ground floor level, with a new kitchen and utility space above. An outdoor dining terrace extends the living space into the garden, creating a direct connection between the new kitchen and its surroundings.

Internally, the house has been extensively reconfigured to improve the flow and functionality of the accommodation, incorporating a redesigned entrance, open-plan kitchen and dining area, and a dedicated home gym with sauna.

Materiality & Architectural Character

The extension has been designed to complement the scale and proportions of the existing house, drawing on its established gabled roofline to create a cohesive architectural form. The addition improves the overall balance of the property when viewed from the water.

External materials have been carefully selected to complement the original dwelling, creating a cohesive architectural character while allowing the new accommodation to establish its own identity.

Improving Energy Performance

A key aspect of the project was the retrofit of the existing building to improve thermal performance and reduce energy consumption. Insulation upgrades throughout the property were combined with the replacement of the existing oil-fired heating system with a ground source heat pump and the introduction of roof-mounted solar panels.

The removal of the swimming pool further reduces the property's energy demand, contributing to a more efficient and sustainable family home.

A Renewed Family Home

The project brings together a substantial extension, comprehensive internal refurbishment and significant improvements to the building's energy performance. By retaining and adapting the existing property, the scheme creates a contemporary family home that makes better use of its coastal setting while delivering improved comfort, functionality and long-term efficiency.