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Annexe project · Heritage Living Group

A three-bedroom family annexe in Newark by Heritage Living Group

A 107sqm SIPs annexe on a farm near Newark, with three bedrooms, a family bathroom, a large open-plan living space and a ramp built into the deck for step-free access on sloping ground.


Published 5 November 2026 · 5 minute read · Written by The Garden Room & Annexe Guide

Heritage Living Group three-bedroom annexe with black batten-on-board cladding, a curved fascia and a wide composite deck
Heritage Living Group  three-bedroom annexe, near Newark

This three-bedroom annexe by Heritage Living Group is a permanent family home on a farm near Newark, Nottinghamshire. It’s all on one level, and a long ramp built into the deck gives step-free access from the garden, even though the ground slopes away from the building.

At 12.6m x 8.5m, it’s one of the largest annexes we’ve featured. Inside there’s an open-plan kitchen, dining and living space, a double bedroom, two children’s bedrooms, a family bathroom with a bath, and a separate utility entrance.

At a glance

  • Size: 12.6m x 8.5m, about 107sqm, with an overall height of 2.89m. Three bedrooms, an open-plan kitchen, dining and living space, a family bathroom and a utility entrance.
  • Built for: a family living full time on a farm near Newark, Nottinghamshire.
  • Construction: structural insulated panels (SIPs) for the floor, walls and roof, on ground screw foundations, built to full residential standard with planning permission and Building Control sign-off.
  • Finishes: Millboard batten-on-board cladding in Burnt Cedar, a curved fascia over an oak-toned soffit and a Golden Oak deck with a ramp outside; plastered walls and oak-effect floors inside.
  • Company: Heritage Living Group, Doncaster.

See more three- and four-bedroom annexes →

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A self-contained annexe
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— a home from day one
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Outside

Cladding with an agricultural feel

The walls are clad in Millboard’s Board & Batten in Burnt Cedar. Millboard is a composite resin board with a real wood-grain texture, and the Burnt Cedar finish is black, with the reddish brown of cedar coming through. Narrow battens stepped over wider boards give the walls a deep vertical profile that echoes the barns and timber buildings on the farm around it. Unlike timber, it doesn’t need oiling to hold its colour, which matters on a building that’s somebody’s home.

Curved roof corner on the Heritage Living Group annexe, with an oak-toned soffit over black Millboard cladding
The curved corner  oak-toned soffit over Burnt Cedar

The roof oversails the walls by 750mm, and the soffit underneath is lined in golden oak-toned boards, four deep. Against the black cladding the contrast is strong, especially after dark when the soffit and the tall wall lights are lit. The fascia curves round each corner instead of meeting at a right angle. That takes more work to build than a square corner, and it gives the building much of its architectural character.

The Heritage Living Group annexe at night, with its soffit and tall wall lights lit above a rain-wet deck
After dark  the soffit and wall lights lit
Access

A ramp built into the deck

The ground slopes across the plot, so the deck stands higher at one end. In place of steps, Heritage Living Group built a long ramp into the deck, with railings along its edge, rising from the lawn to the entrance. It’s laid in Millboard’s Lastagrip boards, which have a slip-resistant surface, and the deck itself is Millboard in Golden Oak. Because the ramp is built as part of the deck, not bolted on afterwards, it reads as one piece with the building.

Ramp with metal railings rising across sloping ground to the Heritage Living Group annexe during construction
The ramp  rising across the slope

Inside, every room is on the same level, and French doors from the dining area and the main bedroom, along with a wide set of sliding doors beside the kitchen, all open onto the deck.

Railed Golden Oak deck running past French doors on the Heritage Living Group annexe, with fields beyond
The deck  Golden Oak, with French doors onto it
Layout

How the layout works

Floor plan of the 12.6m x 8.5m Heritage Living Group annexe: open-plan living, three bedrooms, bathroom; side view 2.89m high
The plan  12.6m x 8.5m, with the side elevation

The plan divides the annexe into two parts. The kitchen, dining and living space takes one end, about 6.5m across and the full 8m depth of the building. The rest is arranged around a short hallway, with the two children’s bedrooms and the bathroom along the back wall, and the utility entrance and main bedroom along the front. It keeps the bedrooms away from the kitchen and living space, which matters in a home with young children.

The roof has a gentle fall, and the side elevation gives the building an overall height of 2.89m at its highest point. That leaves room for a good ceiling height inside, which helps the open-plan space feel light and airy.

Inside

An open-plan room for the whole family

Open-plan living space in the Heritage Living Group annexe, with sofa, armchairs and a dining table by sliding doors
The open-plan room  sitting, dining and kitchen in one

Glazing on two sides brings in daylight from the fields, and the family have arranged the room as three areas. The sitting room at the far end is set against a deep teal wall that holds the television, which gives that end a calmer, more enclosed feel than the pale walls around the rest of the room.

Sitting area in the Heritage Living Group annexe, set against a deep teal wall with a wall-mounted television
The sitting room  against a deep teal wall

A long oak dining table sits by the French doors, looking out across the fields.

Oak dining table beside French doors looking onto farmland in the Heritage Living Group annexe
The dining area  by the French doors
Inside

One of the biggest kitchens we’ve seen in an annexe

The kitchen is L-shaped, with a long peninsula that forms a breakfast bar facing into the living space. The hob is set into the peninsula, so whoever is cooking faces the room, not a wall, and the stools on the other side make it the natural place to sit and talk.

Breakfast bar with oak stools and an induction hob in the Heritage Living Group annexe kitchen, hallway beyond
The breakfast bar  with the hob facing the room

A bank of tall units holds a pair of built-in ovens at eye level, and cream Shaker-style doors with a dark worktop run along both walls.

L-shaped kitchen in the Heritage Living Group annexe with cream Shaker doors, a dark worktop and two built-in ovens
The kitchen  L-shaped, with a tall oven bank
Inside

Three bedrooms and a family bathroom

An oak-doored hallway leads from the kitchen to the bedrooms. The main bedroom is a 3.6m x 3.8m double with its own French doors to the deck.

Main double bedroom in the Heritage Living Group annexe with a wall-mounted television and bedside lamps
The main bedroom  3.6m x 3.8m, with French doors

The two children’s rooms are 3m x 2.5m each, one fitted with bunk beds and the other with a single bed, and both have a window to the back of the building.

Children’s bedroom with white bunk beds and a road-map rug in the Heritage Living Group annexe
A children’s room  3m x 2.5m, with bunk beds

The bathroom, at 3m x 2m, is big enough for a freestanding bath under the window, a grey vanity unit with drawers and a tall heated towel rail. Most annexes have a shower room; this one has a full family bathroom.

Family bathroom in the Heritage Living Group annexe with a freestanding bath, grey vanity and heated towel rail
The family bathroom  with a freestanding bath
Inside

A utility entrance

The front door opens into a utility, not straight into the living space. Full-height cupboards match the kitchen, a worktop runs over the washing machine, and oak peg rails take coats. On a working farm, it means muddy boots and wet coats stop here, away from the rest of the house.

Utility entrance in the Heritage Living Group annexe with tall cupboards, a washing machine and oak peg rails
The utility  where muddy boots stop
Construction

Built to full residential standard

Heritage Living Group built the annexe with SIPs for the floor, walls and roof, on ground screw foundations, to full residential standard. The project went through planning permission and Building Control sign-off, so it’s approved as a permanent home rather than occasional accommodation. For a building this size, lived in full time by a family, that’s the route to look for.

The company

A family-run group in Doncaster

Heritage Living Group are a family-run construction group based in Doncaster, building garden rooms, annexes, extensions and lodges to residential standards across Yorkshire and beyond. Each building is designed to order, with 3D visuals and mood boards so clients can see how it will look before work starts.

Planning an annexe?

Learn more about Heritage Living Group

To find out more about Heritage Living Group’s garden rooms and annexes, visit heritageliving.co.uk, call 01709 865392, or email hello@heritageliving.co.uk.

See their garden annexes More Heritage Living Group projects
More projects like this Three- and four-bedroom annexes Building on a sloping site
Read the guides SIPs construction Annexe planning routes

Published 5 November 2026 · Photographs and plan courtesy of Heritage Living Group.

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A self-contained annexe
in your garden
No planning permission
required in most cases
Kitchen, bathroom & bedroom
— a home from day one
Fully fitted & insulated,
built in weeks
Based in Brighton & Hove,
building across England
Explore annexes →
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