Mews House Deep Retrofit London

posted in: London architecture | 0

Mews House Deep Retrofit Building Project, London Home Refurb, English Low Carbon Architecture Photos

Mews House Deep Retrofit

25 November 2022

Retrofitted mews house shortlisted for RIBA House of the Year 2022

Mews House Deep Retrofit by Prewett Bizley Architects, in London, south east England:
Mews House Deep Retrofit in London
photograph © Tom Graham

RIBA House of the Year 2022 Winners

Mews House Deep Retrofit, London, England

This project extensively refurbished an existing end-terrace mews in London. As well as enabling the client’s family to remain in their community, the upgrade has radically improved the house’s carbon footprint and enhanced its local conservation area setting.

Mews House Deep Retrofit by Prewett Bizley Architects, in London
photograph © Andrew Meredith

Having previously lived in a draughty and energy-hungry house, the client wanted a low-energy, highly sustainable solution for their new home. So, they set about finding an architect who could fulfil their objectives and it is apparent that the solutions delivered by the architects have exceeded their initial expectations.

Mews House Deep Retrofit by Prewett Bizley Architects, in London
photograph © Andrew Meredith

The old mews was completely stripped out, allowing the external fabric’s thermal performance to be significantly upgraded. The external walls were lined with moisture-permeable insulating plaster (lime, cork and loam). New sash-and-case windows were installed, using efficient framing and evacuated glass, which has insulating properties close to the performance of triple glazing. The existing garage doors were retained, cleverly concealing bikes and other outdoor equipment.

The interior spaces have been boldly and confidently re-worked. Through a glazed entrance lobby, the open-plan ground floor is the hub of the house. The vertical circulation has been relocated to the darkest corner of the plan, replaced by a beautifully conceived and detailed timber staircase. It connects the three levels of accommodation, lit from above by a new roof light that allows light to penetrate all the way to the ground floor.

Mews House Deep Retrofit by Prewett Bizley Architects, in London
photograph © David Grandorge

On the middle floor, glazed screens maintain a visual connection back to the staircase, making it an active part of the house. The landing here leads to a ‘snug’ that doubles up as a spare bedroom. Despite the initial doubts of the client, this space is used every day as a home office, play area, and somewhere for the family to gather to watch TV. Elsewhere on this level is the primary bedroom and ensuite, along with a series of cupboards housing cleverly concealed laundry facilities.

The top attic floor comprises children’s bedrooms, a bathroom and an ensuite. A fully retractable roof light gives access to a roof-mounted air-source heat pump (ASHP).

The house is all-electric, with heating and, potentially, cooling provided by the ASHP. Its ventilation strategy is mixed-mode, with heat recovery in winter and natural ventilation in the summer.

Mews House Deep Retrofit by Prewett Bizley Architects
image © Prewett Bizley Architects

In-use data after a year of occupation demonstrated an 82% reduction in energy consumption, meeting LETI requirements and exceeding the RIBA’s 2025 targets for new-build houses.

Had planning constraints permitted the installation of PVs, the architects think that operational energy use would have beaten the RIBA’s 2030 targets as well.

Mews House Deep Retrofit by Prewett Bizley Architects, in London
photograph © Tom Graham

The project’s carbon footprint has been assessed over its whole lifecycle, with both the embodied carbon of the retrofit and the operational carbon realistically appraised. The operational carbon is low enough to give a three-year payback on the embodied carbon.

The building’s clear and simple reconfiguration, along with its carefully specified and well-detailed fabric upgrade, delivers an exemplary family home with outstanding energy efficiency.

Mews House Deep Retrofit by Prewett Bizley Architects, in London
photograph © Andrew Meredith

Mews House Deep Retrofit London – Building Information

Internal area: 195.80 m²
Contractor: Bow Tie Construction
Structural Engineer: Solid Geometry Structural Engineers
Quantity Surveyor: PT projects
Interior Design: Hannah Carter Owers
Environmental / M&E Engineer: Green Building Store and Enhabit
Joinery: Tom Graham Workshop

Mews House Deep Retrofit London images / information received 231122 from the RIBA

Location: London, south east England, UK

London House Designs

London

London Residential Architecture – recent selection on e-architect:

Casa del Sol, South London
Design: Sophie Nguyen Architects
Casa del Sol South London
photos by Hufton + Crow and Ruth Ward
Casa del Sol, South London

Chiswick House
Architects: Gregory Phillips Interior Design
Chiswick House West London Property Update
photo : Mel Yates
Chiswick House, West London Property

St Augustine, Camden, North London
Design: Square Feet Architects
St Augustine House Camden London
photo : Rick McCullagh
St Augustine House, Camden

London Building Designs

Contemporary East London Architecture Designs

ABBA Arena East London Building, close to Pudding Mill Lane DLR
Design: STUFISH Entertainment Architects
ABBA Arena East London Building
photo © Dirk Lindner courtesy Stufish
ABBA Arena East London Building

LFA Co-designing Equity in the Public Realm Competition 2022
LFA Co-designing Equity in the Public Realm Competition
photo : Mark Allan
LFA Co-designing Equity in the Public Realm Competition

Whitechapel Elizabeth Line Station, Whitechapel Market Conservation area, east London
Design: BDP
Whitechapel Elizabeth Line Station entrance
image © BDP
Whitechapel Elizabeth Line Station Building

Homerton High Street Development, Hackney, north east London
Design: CZWG Architects
Homerton High Street Hackney London building
visualisation : CZWG Architects
Homerton High Street Hackney Regeneration

A House for Artists, 36 – 40 Linton Road, Barking, east London
Design: APPARATA
A House for Artists Barking Town Centre

London Architecture

Contemporary London Architecture Designs

London Architecture Designs – chronological list

London Architecture Walking Tours – tailored UK capital city walks by e-architect

London Architects Offices

London Architecture News

Comments / photos for the Mews House Deep Retrofit London designed by Prewett Bizley Architects page welcome