Garden Annexes in Mayfair designed for discreet luxury and everyday practicality. Create a self-contained space with bedroom, bathroom and kitchenette, fully insulated and professionally serviced. Fine Landscaping manages design, build and planning support from start to finish.
Response within 24 hours
Mayfair homes demand additions that feel intentional, not improvised. Our garden annexes are built as fully self-contained spaces—ideal for guests, staff accommodation or a private studio—without compromising the look of your outdoor setting. We regularly work near Berkeley Square and along Mount Street, where privacy and finish quality matter. Every annex includes insulation, electrics and plumbing, with options for a kitchenette, bathroom and bedroom layout.
The Mayfair property mix—Georgian mansions, palatial townhouses and luxury apartments—often comes with compact gardens, mews access and strict expectations on detailing. We tailor foundations, heights and external finishes to suit period architecture and premium landscaping schemes. If you’re close to W1, St James’s or Hyde Park, we can match materials to existing stonework, brickwork and garden structures. Our team understands how to deliver modern comfort while respecting heritage character.
We start with a site survey, access plan and a clear specification for services, insulation and internal layout. You’ll receive a staged programme, tidy working practices and a dedicated point of contact throughout the build. Fine Landscaping is based in Norbury, around 40 minutes away, so we can respond quickly for surveys, deliveries and inspections. Homeowners trust us for careful workmanship, transparent communication and a 10-year warranty on the build.
In the Mayfair area, access can be tight and parking controls are strict, so we plan deliveries and waste removal around local restrictions. Many W1 gardens sit behind listed or heritage-sensitive façades, which influences height, glazing and external materials. We also account for neighbouring party walls, noise limits and considerate working hours typical of City of Westminster. The result is a refined annex build that fits the property and avoids avoidable delays.
Rated 4.9/5 from over 280 verified reviews
Costs vary with size, specification and service connections. In Mayfair, a high-quality insulated annex with electrics typically starts around £45,000–£70,000. A fully self-contained build with kitchenette, bathroom, plumbing runs more commonly £75,000–£140,000+, especially with premium cladding, bespoke glazing and higher-end interiors. Groundworks, access constraints and longer service runs can increase budgets; we provide a detailed breakdown after survey.
A straightforward build can take 8–12 weeks from groundworks to final fit-out, depending on size and finishes. Self-contained annexes with bathroom and kitchenette often take 10–16 weeks because plumbing, ventilation, tiling and joinery add stages. Timescales are also affected by access in W1, service connection complexity, bespoke manufacturing lead times and any planning or party wall requirements. We agree a programme before work begins.
Some garden buildings can fall under permitted development, but a self-contained annexe (especially with sleeping accommodation, plumbing and independent facilities) may trigger planning considerations. In City of Westminster, listed buildings, conservation areas and design constraints are common, which can limit height, placement and appearance. We review your property, advise on the likely route, and provide planning support—drawings, documents and liaison—so you proceed with confidence.
We provide a 10-year warranty covering the structural build and workmanship, including key elements such as the frame, insulation installation, roof and external weatherproofing. Manufacturer warranties apply separately to products like windows, doors, membranes, electrical components and sanitaryware. We also document the specification and sign-off stages so you know what’s covered. If an issue arises, we respond promptly and arrange remedial work where required.
We offer contemporary or heritage-sensitive designs to suit Mayfair townhouses and Georgian properties. Popular options include timber or composite cladding, brick slips, zinc-style roofs, large sliding doors, acoustic upgrades and underfloor heating. Internally, you can choose fitted storage, premium flooring, compact kitchenettes and spa-style bathrooms. We guide you through layouts, finishes and service positioning so the annexe feels spacious, practical and aligned with your garden scheme.
Get your free, no-obligation quote today.