It’s one of the most frequently asked questions in our industry, and also one of the most misunderstood. People use the terms ‘interior design’ and ‘interior decorating’ interchangeably, but they describe very different things. Understanding the distinction matters, because choosing the wrong type of professional for your project can mean ending up with a result that doesn’t quite work, no matter how beautiful the individual elements are.
In this guide, we explain exactly what separates interior design from interior decorating, where the two overlap, and how to decide which you actually need.
Defining Interior Decorating
Interior decorating is concerned with the surface and the aesthetic. A decorator’s role is to select the colours, materials, fabrics, furniture, and accessories that make a space look beautiful. Their work operates within an existing structure. They are not concerned with walls, architecture, spatial flow, or structural changes. They work with what’s there.
Decorators have a highly developed eye for colour, proportion, and style. They know how to compose a room so that it feels harmonious and considered. They understand which shades of white work in north facing rooms and which don’t, how to layer textiles to create warmth, and how to mix periods and styles in a way that feels intentional rather than accidental.
If the proportions are good, the layout works, and there are no structural issues to resolve, and you simply need someone with an exceptional eye to change how it looks, an interior decorator may be exactly what you need.
Defining Interior Design
Interior design encompasses everything that interior decorating does, and considerably more. An interior designer is trained to work with space itself, not just its surface appearance. They think about how people move through a building, how natural light changes through the day and through the seasons, how architecture and interior relate to each other, and how a space functions for the specific people who live or work in it.
Interior designers can and do work across the full scope of a construction project. They produce technical drawings and specifications that are handed to contractors for building. They can specify bespoke joinery, design built in furniture, resolve structural layouts, and coordinate the full construction and fit out process from design concept through to final installation.
In short: all interior designers can decorate, but not all interior decorators can design.
Where the Distinction Matters Most
The difference between the two becomes most consequential when a project involves any of the following:
Changes to the layout or spatial arrangement. If walls are being moved, openings created, a kitchen reconfigured, or a bathroom repositioned, you need an interior designer, someone who can work with the architecture and produce the technical drawings that contractors require.
Bespoke built in furniture. Wardrobes, joinery, shelving, kitchen cabinetry designed from scratch and built to the specific dimensions of your room: this requires technical specification that goes beyond decoration.
New construction or significant renovation. If you’re undertaking a full refurbishment, extending your home, or fitting out a commercial space, the complexity demands an interior designer’s training and technical capability.
Commercial projects. Office fit outs, hospitality spaces, retail environments, and other commercial interiors involve specific regulatory and functional requirements, including accessibility, fire strategy, and building regulations compliance, that require a qualified interior designer.
By contrast, if you’re refreshing a well proportioned room with new paint, updated furniture, fresh fabrics, and carefully chosen accessories, without touching the walls or structure, an interior decorator is well suited to that brief.
The Training Behind the Title
One reason the distinction matters practically is the training behind each profession. Interior designers in the UK typically hold a degree or equivalent qualification in interior design or interior architecture, a programme that covers spatial design, technical drawing, construction principles, materials science, lighting design, and project management alongside aesthetics.
Interior decorators may have formal training in colour, textiles, and design history, or may have developed their expertise through experience and an innate visual intelligence. Both are legitimate paths, but only one equips a practitioner to handle the technical and spatial demands of a complex design project.
It’s also worth noting that in the UK, ‘interior design’ is not a legally protected title in the way that ‘architect’ is. Anyone can call themselves an interior designer. This makes it all the more important to look carefully at a studio’s portfolio, training, and experience before engaging them, rather than assuming that a title alone tells you what they’re capable of.
Which Do You Need?
The honest answer depends on your project. Here are some guiding questions:
Is your space fundamentally well laid out? If you’re happy with where the walls, windows, and doors are, and the room simply needs refreshing aesthetically, decoration may be sufficient.
Are any structural or building works involved? If the answer is yes, and even minor works are involved, you need an interior designer who can produce the technical specifications required.
Do you want a cohesive result across multiple rooms or a whole property? A full interior design service considers the property as a whole: the flow between spaces, the consistency of palette and material, the way light moves through the building. This holistic perspective is more developed in interior design practice than in decoration.
Is the project commercial? Commercial interiors almost always require a qualified interior designer.
How complex is the project? The more complex the project, with multiple contractors, suppliers, bespoke elements, and design decisions to coordinate, the more valuable a designer’s project management capability becomes.
How BD Interiors Approaches This
At BD Interiors, we offer a genuine interior design service: one that extends from the spatial and architectural through to the finest decorative detail. We’re equally comfortable producing technical drawings for a new kitchen layout as we are selecting the exact shade of limewash for a bedroom wall or sourcing a unique piece of antique furniture.
For some clients, what they actually need is closer to a high end decorating service, and we’re honest about that. If a consultation reveals that a project is primarily about aesthetic refinement rather than structural or spatial redesign, we’ll tell you, and we’ll propose the service level that genuinely matches the brief.
What we never do is apply a full design service to a project that doesn’t need it, or a decorative solution to a project that requires something more rigorous.
A Final Note on Language
In everyday conversation, ‘interior design’ has become the default term for anything involving improving the look of a space, and that’s fine. When you’re talking to a professional, however, it’s worth being precise about what your project actually involves. The clearer you are about whether your project is structural or purely aesthetic, the easier it becomes to find the right person for the job, and to have an honest conversation about what they’ll charge and what they’ll deliver.
If you’re unsure which category your project falls into, we’re always happy to talk it through. Get in touch with BD Interiors and we’ll give you an honest steer.
