Garden Annexes in Kensington designed for discreet luxury and everyday comfort. We build fully self-contained spaces with insulation, electrics, plumbing, a kitchenette, bathroom and bedroom. Ideal for guest stays, grown-up children, or a quiet home office with real separation.
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Kensington homeowners often need extra space without sacrificing the character of their garden. Our annexes are designed to sit comfortably behind mansion blocks and period conversions near Kensington High Street, with layouts that feel like a small home. Each build can include a kitchenette, bathroom and bedroom, so guests or family have genuine independence. We also plan for year-round comfort with proper insulation and ventilation.
Across W8 and W14, we regularly work with stucco townhouses, mansion blocks and sensitive rear gardens where access can be tight. In Holland Park and South Kensington, we tailor foundations, drainage and service routes to suit older properties and established planting. Finishes are chosen to complement traditional façades while keeping the annex contemporary inside. The result is extra living space that feels intentional, not bolted on.
We start with a measured survey, concept layout and a clear specification for electrics, plumbing and insulation. You’ll receive a staged programme, tidy site management and regular updates, with planning support where required. Our team coordinates trades so the kitchenette, bathroom and bedroom elements are delivered as one integrated build. Kensington clients value our careful detailing, considerate working practices and long-term workmanship warranty.
In the Royal Borough of Kensington and Chelsea, rear access, parking restrictions and neighbour considerations can shape how we deliver a build. We plan deliveries, waste removal and working hours to suit busy streets around Earl’s Court and Kensington Gardens. Ground conditions and existing drainage vary between older terraces and mansion blocks, so we assess levels and service runs early. Our designs also respect sightlines from elegant squares and mature gardens.
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Costs in Kensington typically range from £45,000–£120,000+, depending on size, specification and how “self-contained” you want it. A compact insulated room with electrics sits at the lower end, while a full annexe with kitchenette, bathroom, bedroom, upgraded glazing, underfloor heating and higher-end finishes moves the budget upward. Access constraints, groundwork complexity and utility connections can also influence the final figure.
Most garden annexes take around 6–12 weeks on site once designs and specifications are agreed. Simpler builds with straightforward access can be quicker, while full annexes with bathroom plumbing, kitchenette fit-out and bespoke joinery take longer. Timescales are also affected by groundwork, service connections, lead times for windows/doors, and any planning or party wall processes. We provide a realistic programme before work starts.
Some garden buildings can fall under permitted development, but a self-contained annexe with sleeping, bathroom and kitchenette facilities may trigger additional planning considerations in RBKC. Constraints such as conservation areas, listed buildings, height limits and proximity to boundaries can also apply. We review your site, advise on the likely route, and provide planning support with drawings and documentation so you proceed with confidence and compliance.
We provide a 10-year warranty covering workmanship and key construction elements of your garden annexe, giving you long-term reassurance. This includes the structural build-up, weatherproofing and installation quality, subject to normal use and maintenance. Manufacturer warranties also apply to specified components such as doors, windows and certain electrical products. We document the specification and handover details so you know exactly what’s covered.
Design options range from contemporary cedar or composite cladding to painted timber, brick slips or render to suit Kensington’s period settings. Internally, popular choices include engineered oak flooring, microcement or porcelain bathroom finishes, and compact kitchenette layouts with integrated appliances. We can specify high-performance insulation, acoustic upgrades and skylights for natural light. We guide you through options based on budget, maintenance preferences and how you’ll use the space.
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