A west London house by designer Jessica Summer that is as serene as it is practical

Interior designer Jessica Summer's latest project in west London sensitively balances practicality and beauty, providing a sanctuary for its owners – and shows us why it's all in the detail

New came in the form of a soaring double-height barrel-vaulted glazed extension at the back of the house, which now accommodates the kitchen-dining area and runs across the lower ground and ground floors. ‘We talked right at the beginning about the pinch points and linearity typical to a London house,’ recalls Jessica, who worked closely with CKW Architects to bring her architectural interventions to life, including the addition of a roof terrace on the top floor. ‘Not only does the lower ground extension flood the house with light, but by pushing through the roof you’re exposed to this whole other volume,’ she explains. ‘It takes away any sense of low or narrow proportions.’ It also provided the ideal spot for 7 metres high worth of bookshelves, designed to accommodate the owner's vast collection of books. ‘Her husband joked that she had more books than the British Library and the space has filled up pretty quickly,’ says Jessica.

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The barrel-vaulted extension stretches from the lower ground to the ground floor. The dining table is by Heerenhuis, while the chairs are G Plan, sourced from eBay.

Jake Curtis

Elsewhere, new interventions, designed to create a serene, cohesive backdrop, were a little more subtle. Although few architectural details remained, Jessica reinstated what she could by adding deep cornices, architraves and elegant new doors to give the house a quiet grandeur. Aside from downstairs, the layout stayed largely the same, with a study and double living room on the raised ground floor and four bedrooms spread across the upper two floors. In the extension, Jessica deployed textures to soften the contemporary architecture. Hand-aged oak floors, laid as if they could have always been there, but crucially with gaps small enough to ensure a stray piece of spaghetti wouldn’t end up wedged there, ground the space, while beams were also added to the kitchen ceiling to create visual interest. Jessica had the idea of creating a black kitchen – but even in that there is texture, through the ebonised oak fronts and oak-topped island. ‘What’s great about the fronts is that unlike painted ones, they don’t chip,’ explains Jessica.

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The top of the barrel-vaulted extension, as seen from the raised ground floor sitting room. The built-in bookshelves extend to almost 7-metres in height.

Jake Curtis

Thanks to her skill you would never know, but the house is full of these practical considerations. Huge amounts of storage is carved in, from a pantry to the glazed wall unit that hangs above the kitchen cupboards, which Jessica had made based on an antique original and fitted with nice old glass. ‘I love how it gives another historic layer to the space,’ she adds.

When it came to decorating, it was about creating a restful space with soft colour. ‘It didn’t feel like a minimal house that would be all whites and neutrals,’ explains Jessica. As such, the raised ground sitting room glows in ‘Lute’ by Edward Bulmer. ‘At some point, we all realised that we had a love for mustard and it reminded the husband of a big squishy sofa that he grew up with.’ Jessica created the couple’s own version of that too, upholstering an Andrew Martin sofa in a loose cover made from a mustard velvet from George Spencer. ‘Using colour and pattern sparingly throughout just makes the space feel like it really speaks,’ explains Jessica. Contrary to her usual preference for colour drenching spaces, she has mixed that up a little here, painting the window frames in contrasting dark chocolates and blues. ‘I was inspired by old Spitalfields houses,’ she explains. ‘There was something that appealed to me and the clients about accentuating the windows.’

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In the sitting room on the raised ground floor, walls in Edward Bulmer's ‘Lute’ provides a cheerful backdrop. ‘It’s a nice fresh, sunny room that feels so comfortable,' explains Jessica. The sofa, upholstered in a loose cover made from a mustard velvet from George Spencer, is from Andrew Martin, while the ottoman was made bespoke and is upholstered in Guy Goodfellow's ‘Fez Weave' and The Cloth Shop's ‘Khaki Linen’ for the skirt.

Jake Curtis

For the main bedroom, she has created a particularly pretty environment, combining walls in Atelier Ellis’s ‘Garden Party Green’ with stonewashed linen drapes and a headboard – one of the few patterns in the house – upholstered in ‘Adhira’ by Alison Gee. The simple form of the iron four-poster bed belies the effort that went into creating it. ‘It was so complicated to make and there was a lot of co-ordination between the metal worker, builder and curtain maker to get it right,’ admits Jessica, with a smile. That knack for making things look effortless underpins a lot of what she does. The pair of wardrobes at the end of bed are a case point, based on a cabinet by the Secessionist period designer Koloman Mosser and built bespoke, along with much of the joinery in the house, by RNC Cabinetree. In the ensuite bathroom, the shower – framed by an arch that mirrors the barrel-vaulted extension – Jessica spent ages developing a bespoke shower drain that felt worthy of the beautiful, bespoke marble floor it was being fitted into. ‘My motto is that every detail should sing,’ says the designer.

One such detail is the hardware and hinges – those elements that are so often overlooked, but are vital to something working well. ‘I love expressing functional fittings and making them part of the design,’ she says, pointing out the knuckle of the brass pivot hinge on the bathroom vanity unit. ‘For me these micro details need as much attention as the macro elements.’ It is a lesson to learn from and the resulting interior is one that feels effortless, grounded and comfortable. It’s a win win.

jessicasummer.co.uk; ckwarchitects.co.uk