Annexxa 845 One-Bedroom Annexe by Garden Annexes
Published: 14 March 2026
Reading Time: 3 minutes 40 seconds
Garden Annexes design and build self-contained garden living annexes across mainland UK, with four ranges — Annexxa, XB, St George and Ivyo — each available in 24 sizes. This example is an Annexxa 845: 9.3m wide by 5.5m deep externally (8.8m x 5m internally), giving 51.15 sqm of floor space arranged as a one-bedroom home. It is one of the larger annexes featured on the Guide; the Annexxa range runs from 4.9m x 3.8m externally up to 10.4m x 5.6m externally, so buyers can scale to the space they need.
A Considered Presence in the Garden
Despite its size, the annexe does not overpower the family garden. The exterior styling and mono-pitched roofline give a sharp, contemporary look that sits well with the landscaping. When viewed from the main house, the building reads as a considered extension of the house and garden rather than an afterthought. That balance matters for anyone weighing up a larger annexe: there is a right-sized annexe for every garden, and an experienced designer can help you find it.
Garden Annexes specify low-maintenance exterior materials, so the Annexxa keeps its appearance over the long term with little upkeep — an important consideration when committing to a garden annexe. Here, light grey walls are paired with dark grey door and window frames; the frames are white internally, which keeps the interior bright and consistent with the rest of the finish.
A Welcoming Entrance and Open-Plan Living
The annexe is entered through outward-opening French doors set within a portico that forms a welcoming porch. Beyond that, a large main living space runs along the full width of the building.
The owner chose a grey L-shaped kitchen with integrated appliances — a well-appointed kitchen with everything needed for cooking and baking. A wide slot window between the worktop and the wall units brings extra light and a clear view out. There is room for a dining table and chairs and a comfortable lounge area, with views of the garden through three full-height windows on the front wall.
Bedroom and En-Suite
To the rear of the building, a comfortable double bedroom allows space for storage while still leaving easy movement around the room. An en-suite shower room leads off the bedroom. The Garden Annexes team handle all plumbing, electrics and associated groundworks for connecting the kitchen and bathroom to mains services, so clients receive a fully commissioned, move-in ready home without having to coordinate separate trades.
Full Turn-Key From Design to Handover
Garden Annexes manage the whole project for clients: design, approval support (including Lawful Development Certificate where needed), manufacturing in their Suffolk factory, and installation by their in-house team. Their Site Pack — foundations, service trench, and connections for power, water, waste and data — is included in the turn-key service. The on-site build phase is typically complete within 5 to 10 days for both groundworks and annexe. Each building is engineered using Glulam framing and full insulation in floor, walls and roof, double-glazed throughout, for comfortable year-round use.
To explore the full range of sizes and options, request the Garden Annexes brochure pack. Their show site in Suffolk, near Bury St Edmunds, has three furnished show annexes (including an Annexxa 430) that can be viewed by appointment seven days a week.
Learn More
To learn more about Garden Annexes and their four ranges — Annexxa, XB, St George and Ivyo — visit www.gardenannexes.com. You can request their brochure pack for a full overview of sizes and personalisation options. Speak with the team on 01284 636 424 or 0800 368 9781, or email hello@gardenannexes.com.
