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Bedroom and metal staircase of the new-built smart passive house as an architectural garage conversion in Royal Borough of Kensington and Chelsea of London

9 Lexham Gardens Mews

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Services:

London, UK

9 Lexham Gardens Mews,

London, W8 5JQ

Royal Borough of Kensington

and Chelsea

Magnificent Basement Co Ltd

January 2021

65 m2

£ 350,000.00

£1,000,000.00

Studio Greenstone

Michael Baldwin, Hadi Sarmadi,

Arsalan Tahouni

Magnificent Basement Co. Ltd

Duffy Associates, Ground Sun, Solarcrest

Vario, Green Building Store, Truss Tec

Arsalan Tahouni, Michael Baldwin

New Build,

Garage Conversion and Outbuilding,

Basement Conversion
Architectural Consultation and Design,

Quantity Surveying,

Tender Drawings Package,

CGIs and 3D Printed Models,

Development Construction and Turn Keys

Bird view of Front garden of smart passive house in Royal Borough of Kensington and Chelsea of London

History

Originally serving as a storage workshop, the existing structure was a modest timber clad building atop a brick wall. However, its worn-out condition and lack of utility necessitated a transformative approach. Recognizing the site's significance as a visual link between terrace houses and the mews, the Planning office mandated that the replacement development must mirror the design, footprint, scale, and above-ground massing of the original garage. In essence, the aim was to construct a sleek and eco-friendly passive house that seamlessly integrated with the surrounding architectural context while resembling a garage.

Before Refurbishment

Facade elevation and Front garden of smart passive house in Royal Borough of Kensington and Chelsea of London

Smart Passive House
Introduction

In the quest to overcome planning restrictions, the Architect of this project took a bold approach, infusing an urban industrial style into the traditional elements of a garage. By seamlessly integrating materials commonly found in the historic west London Mews, such as brick, timber, and steel, they achieved a remarkable result. The combination of these materials, expertly crafted in a modern manner, has given rise to a distinctive building that effortlessly stands out amidst its architectural counterparts. The traditional London stock brick facade immediately catches your eye, boasting a magnificent large 3-leaf timber door. Adding a touch of history, the door proudly rests beneath a rugged oak beam lintel that once graced a Shropshire train station. The timber cladding, meticulously cut to match the dimensions of the brickwork, merges flawlessly with the reclaimed brickwork at the corner. From the captivating facade to the meticulous integration of brick and timber, every detail has been carefully considered.

Bedroom and Workplace of new-built smart passive house as an architectural garage conversion in Royal Borough of Kensington and Chelsea of London

Bedroom

Kitchen and Living Room of a smart passive house as an architectural garage conversion in Royal Borough of Kensington and Chelsea of London

Kitchen and Living Room

Smart Passive House
Attributes

Upon entering through the main door, you'll be greeted by a captivating view of the entire ground floor, setting the tone for the rest of the house. The open living space boasts generous dimensions, allowing for a seamless transition between different areas. One of the most notable features of this passive house is the abundance of natural light that fills the interior. Strategically incorporated, four new openings maximize the influx of daylight. With two openings in the walls and two large rooflights, a perfect balance is achieved between the indoors and outdoors. A slim steel staircase adorned with oak steps and handrails beckons you to explore the levels below, located beneath the largest rectangular rooflight. The staircase's slender design ensures that the overhead daylight accompanies you as you descend, creating a captivating interplay of light and shadow. The bedroom's large windows provide a delightful view of a serene and inviting lightwell. Positioned to offer tranquillity and a connection with nature, the lightwell serves as a peaceful haven within the house. Adding to the allure, a spiral staircase leads to the lightwell, inviting you to step outside and immerse yourself in the beauty of the surroundings.

Smart Passive House
Characteristics

Step through the hall and enter an oasis of tranquillity. Behind the opaquely glazed door lies a spacious bathroom designed to impress. Its heated marble floor creates a welcoming ambiance, while the minimalistic walk-in shower adds a touch of modern elegance. Positioned beyond the hand cast concrete basin, you'll find the heart of this bathroom, a state-of-the-art services room that serves as the nerve centre for the passive house.

The services room is where an Austrian engineered air source heat pump takes centre stage, efficiently producing all the heating and cooling required for the building. It not only caters to the hot water needs but also powers a series of coils in the ceiling. These coils play a crucial role in regulating the temperature of the fresh air circulated by the ventilation system. The services room, strategically tucked away at the rear of the bathroom, remains hidden from sight. Concealed by a series of acoustic walnut timber panels, it blends seamlessly with the overall design while providing effective noise insulation.

Bathroom

2D Drawing Proposed Plan of Basement floor for new-built smart passive house with one Bedroom and Bathroom in Royal Borough of Kensington and Chelsea of London

Basement Plan

3D visualization of wardrobe finishes in smart passive house in Royal Borough of Kensington and Chelsea of London
Drawing plan of bathroom layout with dimensions in smart passive house in Royal Borough of Kensington and Chelsea of London
2D Drawing Proposed Plan of Ground floor for Smart Passive house with Living room and Kitchen in Royal Borough of Kensington and Chelsea of London

Ground Floor Plan

2D Drawing Designed Section of Basement conversion as an architectural new-built in Royal Borough of Kensington and Chelsea of London

Section B-B

2D Drawing Proposed Section of Basement conversion as an architectural new-built in Royal Borough of Kensington and Chelsea of London

Section A-A

Isometric view of external stairs in smart passive house in Royal Borough of Kensington and Chelsea of London
Isometric view of external staircase in smart passive house in Royal Borough of Kensington and Chelsea of London
2D Drawing Isometric Section of a Passive House Basement design as an architectural new-built in Royal Borough of Kensington and Chelsea of London
Eye level 3D Visualisation of living room and Kitchen of a luxurious smart passive house as an architectural new build Interior design in Royal Borough of Kensington and Chelsea of London

Smart Passive House
Construction

Sustainability was pivotal in constructing this exceptional passive house, aiming to minimize environmental impact and maximize energy efficiency. The eco-friendly choice of a timber frame as the structural backbone supports lightweight and space-saving posi-joists for the ground floor and roof. Glass wool insulation, made from 86% recycled glass, enhances energy efficiency within the carefully filled joists. Natural and recycled materials were prioritized, including disassembled bricks from the existing garage and reclaimed bricks from London's demolition sites. The exterior timber cladding achieves structural integrity without synthetic resins through high-temperature steaming and compression. Multiple layers of rigid insulation boards fill the timber frame, optimizing performance by reducing heat loss and maximizing thermal efficiency. The crowning element of the passive house is the roofing system. An EPDM membrane, renowned for its longevity and recyclability, was chosen as the optimal solution. This roofing material has a minimal environmental impact throughout its life cycle, ensuring durability, waterproofing capabilities, and reduced waste.