Rear façade of No Ordinary House with a glazed extension opening onto the garden

No Ordinary House, Muswell Hill, London

How we made No Ordinary House


SAP Energy Rating improved from E(41) to B(84)
Floor area increased by 45%
New basement supports multi-generational living

Mulroy Architects transformed this 1920s house in Muswell Hill, north London, improving its SAP energy rating from E(41) to B(84) while increasing the floor area by 45%. The redesign added a light-filled basement – currently used as a gym, screening room and bar – designed to support multi-generational living in the future.

Like many 1920s houses, this double-fronted home in Muswell Hill had been extended haphazardly over the years, preventing any natural flow and blocking light from a large part of the footprint. Our clients wanted more space – and better space – for their family.

Rear view of No Ordinary House with a glazed ground-floor extension and garden

Open-plan kitchen and dining area at No Ordinary House, with glazed doors opening onto the garden

<p>Our first move was to unlock the ground floor by clearing two sight lines. One leads straight through the house from the front door to the bottom of the garden, and the second looks up – with the help of a new galleried staircase – though the upper storeys to the sky. Inspired by Horace Gifford’s airy east-coast beach houses, we allowed the extended open-plan living areas to link and overlap, giving room to circulate without compromising on space. We’d already set out these core moves when our clients asked us to push the project further. Could we add a basement too?</p>

Our response was to challenge them back: what exactly would they use the space for, and how would the extra area justify the considerable expense? Having tested a few different scenarios we all agreed that this was a great opportunity to embed social sustainability into the design. We could future-proof the house so Nicola and Stanford, and their extended family, can continue to live in it indefinitely no matter how their lifestyle might change.

Glazed corner and brick exterior at No Ordinary House

Living area and kitchen beside full-height glazing at No Ordinary House

Open-plan kitchen and dining area overlooking the garden at No Ordinary House

The new basement, although it’s currently used as a gym, screening room and bar, can potentially become a self-contained apartment in the future, allowing multiple generations to live under the same roof. It has its own bathroom and, via a sunken courtyard garden sandwiched between the original house and timber-framed extension, outside space and plenty of natural light. And, as the couple’s sons gain more independence, a pair of self-contained bedrooms inserted into the second-floor loft space offer a similar degree of privacy.

Glazed exterior beside the planted garden at No Ordinary House

Double-height stairwell with pendant lights at No Ordinary House

Living room viewed through glazed doors at No Ordinary House