SLOANE HOUSE

Featured Project · Aylesbury A 62-home development delivered as main contractor — including an entire new storey raised on a structural steel frame above the existing building.

12 May 2026, 10:30 Aylesbury, Bucks 2022–2023 62 Apartments Main Contractor

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Apartments

Floors

2022–23

Year

Aylesbury

Location

The Brief

A Residential Scheme, Built Upward

Town-centre sites rarely give you a blank canvas. At Sloane House, the brief was to grow a residential scheme up from a structure that was already standing — turning it into 62 one and two-bedroom apartments across four floors.

Appointed as main contractor, Kojo coordinated every package on site: from the heavy structural engineering at roof level down to the final coat of paint in each apartment. The headline challenge was an entirely new top floor, raised on a structural steel frame and Metsec framing system above the three existing storeys.

Add floors to a live structure in a built-up location and the margin for error is small. Deliveries have to be timed, the crane choreographed around the working street, and the new structure has to land precisely on the old.

On Site

Building Up: The Steel Frame

The additional storeys were formed using a structural steel frame and Metsec framing system, erected directly above the existing building. Here's how it came together.

Steel Delivery

Primary steel sections arrive on site and are craned into position — every delivery timed around the working street.

Frame & Floors

The new top-floor steel frame is erected above the existing three storeys, paired with engineered timber joists to form the floor plate.

SFS & Weatherproofing

Light-gauge SFS framing forms the new walls; terrace decks are membrane-laid and external walls weatherproofed at high level.

Internal Fit-Out

Drylining, plumbing, electrical and carpentry delivered in-house, in sequence, to a handover-ready finish.

Mobile crane lifting structural steel sections from a delivery lorry into position at Sloane House — Primary steel craned into position from the street to form the new floor structure.

New top-floor steel frame and timber floor joists silhouetted against a dusk sky above Aylesbury — The new top-floor steel frame and timber joists catch the last light over Aylesbury.

Interior view of steel beams and engineered timber joists forming the new floor build-up — Steel beams with engineered timber joists form the floor build-up — ready for decking and services.

SFS metal stud framing forming new apartment walls beneath the steel and timber floor structure — SFS stud framing to the new floor — the skeleton of each new apartment.

Membrane-laid roof terrace deck with weatherproofed external walls and edge protection at high level — A membrane-laid terrace deck and weatherproofed walls — the future roof terraces take shape.

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Adding a floor to a building that's already standing is all about precision — the new structure has to land exactly on the old.

The Result

62 Finished Homes

The result is 62 bright, contemporary apartments. Inside, open-plan kitchen and living spaces are finished in a clean, neutral palette designed to feel light and easy to live in, with quality fixtures carried through to the bathrooms.

Open-plan kitchen and living space inside a completed Sloane House apartment, with wood flooring and large windows — Open-plan kitchen and living space — neutral tones, wood flooring and generous glazing.

Contemporary fitted bathroom in a Sloane House apartment with a glass shower screen over the bath — A contemporary bathroom, fitted as part of the full internal package.

Aerial view of Sloane House showing private rooftop terraces on the third floor of the apartment development — The additional floor created private roof terraces on the upper level — hard-won amenity on a town-centre site.

Today

Sloane House Now

Completed, Sloane House is a collection of one and two-bedroom apartments in central Aylesbury. According to the development's own marketing, residents enjoy on-site amenities alongside the private terraces on the upper floor — with the shops, cafés, markets and theatre of an established town centre right on the doorstep, and London Marylebone within easy reach by train. (Sales and marketing of the finished homes are handled independently of Kojo Construction.)

Residents' Gym "The Hub" Lounge Private Roof Terraces Town-Centre Location

Sloane House apartment development illuminated at night, showing the full street elevation — The completed development at night — the white render and red brick lit along the full elevation.

Have a Project Like This?

From structural steel and additional floors to a complete internal fit-out, Kojo delivers developments across London and the Home Counties as a single, accountable main contractor.

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