Two room garden room with washroom by Heritage Living Group
An 8m × 4m garden room in Gainsborough by Heritage Living Group, split into two separate rooms with a washroom, each room opening onto a shared composite deck.
This 8m x 4m project by Heritage Living Group in Gainsborough is a good example of a brief-led design process producing a genuinely flexible building. The family wanted a fully insulated garden room they could use throughout the year, with two independent spaces and a washroom, while still keeping a calm visual connection to the garden.
From the outset, the layout was shaped collaboratively around day-to-day use. Rather than defaulting to one large open-plan room, the design creates two separate rooms that work independently, with access and movement between them via the composite deck. The washroom is incorporated as part of the overall plan, keeping the footprint practical without compromising light or privacy.
At a glance
- Size and layout: 8m × 4m, divided into two rooms that work independently, with a washroom built into the plan and movement between the rooms via the deck.
- Garden views: The building sits to the side of the garden, and each room has its own aluminium bi-fold doors looking across the lawn.
- Exterior: Brown composite cladding with the warm tone of oak, set against Anthracite Grey composite decking, trims and door frames, all chosen to need little more than an occasional wash.
- Construction: Ground screw foundations, which cut down excavation in an established garden, under a SIPs floor, walls and roof with an EPDM roof covering.
- Company: Heritage Living Group, who connected the electrics and the washroom to the mains and had the work signed off through Building Control.
Positioned for garden views
Positioned to the side of the garden, the building looks across the lawn through large aluminium bi-fold doors serving each room. This keeps both spaces visually tied to the garden and brings in plenty of natural light without sacrificing the internal separation the brief called for.
That balance between privacy and openness is one of the most successful parts of the scheme. Each room has its own identity, but the shared external deck keeps the whole plan reading as one considered building.
Low-maintenance by design
The external specification is focused on durability and low upkeep: ground screw foundations, SIPs floor-wall-roof construction, EPDM roofing, composite cladding, and aluminium bi-fold doors. In practical terms, this is the kind of material palette intended to hold its appearance with little more than occasional soapy washdowns.
The brown composite boards are particularly well chosen. They carry the warm tone of natural oak, but without timber weathering to silver over time, and they sit neatly against the Anthracite Grey composite decking, trims and door frames.
Sustainable and buildable with minimal disruption
Ground screws are a useful choice on projects like this because they reduce excavation and site disturbance compared with full concrete foundation approaches. Combined with SIPs, they support a lower-impact construction method while still delivering a robust, highly insulated envelope for year-round use.
As shown in the construction-phase images, the Heritage Living Group on-site team also maintained a tidy working area as the build progressed. That attention to site discipline matters for homeowners, particularly when work is taking place within an established garden that still needs to function during installation.
Interior finish and washroom integration
Inside, both rooms are finished to a high standard, with plastered and decorated walls and ceilings, recessed lighting, and LVT flooring. LVT (luxury vinyl tile) is a durable flooring product designed to replicate the look of natural materials while being easy to clean and practical in everyday use.
Electrics are fully installed for lighting and power, and Heritage Living Group’s turnkey service includes final connection to the mains electricity supply. The washroom is similarly handled as part of the package, with mains service connections coordinated by the team and the works signed off through Building Control.
Learn more about Heritage Living Group
Heritage Living Group design and build SIP-based garden rooms and annexes across Yorkshire and beyond, with a turnkey service from design through to final service connections. To explore their work, visit heritageliving.co.uk, call 01709 865 392, or email hello@heritageliving.co.uk.
