Decorating Open-Plan Spaces in London Homes: Colour Zoning and Palette Continuity

Open-Plan Decorating: The Core Challenge

The rear-extension open-plan kitchen-diner-living room has become the default renovation outcome for London Victorian and Edwardian terraces over the past two decades. Walk through any SW or W postcode and behind the period front elevations, the majority of ground floors have been opened up: walls removed, extensions added, bifold or sliding doors installed to the garden. The result is a spatial type that the original builders never anticipated — and one that presents specific decorating challenges.

The problem is not usually what colour to choose but how to handle colour across a space with multiple functions, different ceiling heights, varying light conditions across the length of the room, and transitions between the original fabric of the house and new build extension fabric.

The Single-Palette Approach

The simplest and most coherent strategy for an open-plan space is a single neutral palette carried throughout — walls, ceiling and joinery all working from the same family of tones. This avoids any jarring transition as the eye moves from kitchen to living zone to garden door, and it creates a sense of spatial generosity by not visually sectioning the space.

For this approach to work, the neutral must be warm enough to avoid reading as grey or clinical across a wide, varying surface. Our go-to choices for this application include Little Greene Bone (LRV 72), Farrow & Ball Pavilion Gray (LRV 68) and Dulux Trade Chic Shadow — all warm neutrals that read as settled and considered rather than institutional.

The risk of a single-palette approach is visual monotony, particularly in longer spaces (5 metres or more). The mitigation is variation in finish rather than colour: walls in eggshell, ceiling in flat emulsion, joinery in satinwood, creating tonal interest through surface quality rather than contrasting colour.

Colour Zoning

Where a client wants to define different functional areas within the open plan — typically distinguishing the kitchen from the sitting area — colour zoning is the appropriate approach. This involves applying different colours to different volumes within the space, using the architecture of the room to determine where one zone ends and another begins.

The most natural zone boundaries in a rear extension are:

• The junction between the original rear wall of the house and the extension — often marked by a RSJ or change in ceiling height
• The kitchen area, which has a different material palette (cabinetry, splashback tile, worktop) and can accept a more utilitarian or contrasting colour
• A reading or seating alcove, which can be treated as a distinct colour pocket without compromising the main space

For colour zoning to read as deliberate rather than unfinished, the colours in each zone must be clearly related — either from the same paint manufacturer's tonal family or selected to share the same undertone. Mixing a cool grey kitchen with a warm cream sitting room rarely works; both zones need to live in the same tonal temperature.

Feature Walls and Architectural Emphasis

Open-plan spaces often have single architectural moments that benefit from emphasis — a chimney breast that has been retained through an extension, a run of bespoke joinery, a vaulted or lantern ceiling over the rear section. These elements can carry a bolder colour or finish treatment without competing with the rest of the space.

A chimney breast in a deep, grounded tone — Farrow & Ball Down Pipe, Little Greene Obsidian, Papers and Paints Lamp Black — anchors a sitting area within a larger open-plan space effectively. The key is limiting this treatment to genuinely architectural elements; applying it to a mid-wall section of a long elevation simply looks arbitrary.

Ceiling treatment in the vaulted or lantern section of a rear extension can distinguish the more informal garden zone from the main reception. A fractionally warmer or deeper ceiling shade over the kitchen island and dining area, with a standard flat white over the living zone, divides the space subtly without any visible wall-to-wall colour change.

Transitions and Continuity

One of the most frequently misjudged elements in open-plan decorating is the transition from the decorated extension back into the rest of the ground floor — the hallway, the front reception, the utility room. The open-plan colour scheme tends to stop at the first door and a completely different scheme takes over. This creates a jarring experience moving through the house.

A better approach is to select the open-plan palette first, then carry at least one of its tones — usually the main neutral — into the adjacent rooms, even if the secondary colours differ. The connecting thread might be as simple as the same satinwood on all joinery throughout the ground floor, or the same ceiling colour carried from front to back.

Practical Notes on Finish

In kitchens — even within a more relaxed open-plan context — wall surfaces near cooking areas must be washable. We specify Class 1 or Class 2 washability emulsions (EN 13300) for walls within 1.5 metres of the hob, which means a trade eggshell or commercial matt rather than a standard estate emulsion. Dulux Trade Eggshell, Farrow & Ball Modern Eggshell and Crown Trade Clean Extreme all meet this standard.

For bifold and sliding door frames and the garden-facing elevation, external-grade finishes are required even for internal applications where the frame is exposed to weather when doors are open.

To discuss decorating your open-plan space in London, contact us here or request a free quote.